JP2008263295A - Radio communication terminal device and rfid module - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a radio communication terminal device of simple structure that can achieve compact and inexpensive device constitution, can divert a radio communication module such as an existent mobile phone radio communication module and an existent radio LAN module, and can suppress the number of terminals of a high-frequency line, and to provide an RFID module. <P>SOLUTION: The radio communication terminal device is provided with an antenna section 10, a wireless LAN communication section (or a mobile phone radio communication section) 20 for performing transmission and reception of wireless LAN communication (or mobile phone radio communication), and an RFID radio communication section 30 for performing transmission and reception of RFID radio communication, wherein the RFID radio communication section 30 is arranged between the antenna section 10 and wireless LAN communication section (or the mobile phone radio communication section) 20, and the radio communication terminal device uses an oscillator 21 of the wireless LAN communication section (or the mobile phone radio communication section) 20 to perform the transmission and reception of RFID radio communication by the RFID radio communication section 30 through the antenna section 10. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a wireless communication terminal device and an RFID module, and in particular, wireless communication capable of performing first wireless communication (for example, mobile phone wireless communication or wireless LAN communication) and second wireless communication (for example, RFID wireless communication). The present invention relates to a terminal device and an RFID module applied thereto.

  In recent years, an RFID (Radio Frequency Identification) system that performs RFID wireless communication using an RFID wireless communication method uses information written / read using an RFID reader / writer on an RFID tag attached to an object to be managed. Therefore, it is being widely used for production, distribution, distribution, inventory management, and the like.

  On the other hand, with the spread of mobile phone wireless communication systems that perform mobile phone wireless communication using mobile phone wireless communication methods and wireless LAN (Wireless Local Area Network) systems that perform wireless LAN communication using wireless LAN wireless communication methods. These communication systems and RFID systems are also used.

  For example, when two systems of an RFID system and a wireless LAN system are used in the physical distribution and distribution fields, as shown in FIG. 11, the management object Q from the RFID tag X acquired by the RFID wireless communication W1 is displayed. The read information is transmitted from the terminal device Y to the management processing unit Z by the wireless LAN communication W2 via the access point P, and the management target Q is managed by processing the transmitted read information by the management processing unit Z. Configured. In addition, when writing information to the RFID tag X, the write information is transmitted from the management processing unit Z to the terminal device Y via the access point P via the wireless LAN communication W2, and further to the RFID tag X via the RFID wireless communication W1. It is configured to write the transmitted writing information by transmitting. That is, when a wireless LAN system is used, information is transmitted / received by wireless LAN communication, while when an RFID system is used, information is transmitted / received by RFID wireless communication.

  The same applies to the case of using two systems, a mobile phone communication system and an RFID system. That is, when a mobile phone communication system is used, information is transmitted / received by mobile phone wireless communication, while when an RFID system is used, information is transmitted / received by RFID wireless communication.

  As described above, conventionally, at least two types of wireless communication are performed: first wireless communication (for example, wireless LAN communication or mobile phone wireless communication) and second wireless communication (for example, RFID wireless communication) different from the first wireless communication. In this case, there are the following problems. Hereinafter, two wireless communications, ie, wireless LAN communication (or mobile phone wireless communication) and RFID wireless communication will be described as an example. In the case of mobile phone wireless communication, it is shown in parentheses. The same applies to the following description.

  FIG. 12 shows a configuration example in the case where two antennas, ie, wireless LAN communication (or mobile phone wireless communication) and RFID wireless communication, are used to share an antenna using an antenna switch, and an RFID tag It is a block diagram which shows the example of a structure. FIG. 12 shows a case where two wireless communications of wireless LAN communication and RFID wireless communication are performed, or a case where two wireless communications of cellular phone wireless communication and RFID wireless communication are performed. In the case of mobile phone wireless communication, it is shown in parentheses.

  As shown in FIG. 12, a wireless LAN communication unit (or mobile phone wireless communication unit) 100 includes an oscillator 101, a modulator 102, a transmission amplifier 103, a transmission / reception switch 104 that switches between a transmission signal and a reception signal, and reception. An amplifier 105, a demodulator 106, a data input unit 107 to which data to be transmitted and the like are input, and a data output unit 108 to extract received data and the like are included.

  The wireless LAN communication unit (or mobile phone wireless communication unit) 100 also changes the signal processing unit for processing data to be input from the data input unit 107 to the modulator 102 and the frequency of the signal to be transmitted. In the case of performing frequency hopping, a synthesizer control unit for changing the frequency of the carrier wave transmitted by the oscillator 101 is included, but the illustration is omitted in FIG.

  The RFID wireless communication unit 200 includes an oscillator 201, an RFID modulator 202, a transmission amplifier 203, a signal separator 204 such as a directional coupler, a local amplifier 205, an RFID demodulator 206, and an RFID tag 2. The data input unit 207 to which the transmission data is input and the data output unit 208 to which the reception data from the RFID tag 2 are output are included.

  The RFID wireless communication unit 200 includes a signal processing unit that processes data to be input from the data input unit 207 to the RFID modulator 202, but is not illustrated in FIG.

  The antenna unit 301 shares an antenna that transmits and receives radio waves for wireless LAN communication (or mobile phone wireless communication) and an antenna that transmits and receives radio waves for RFID wireless communication. The antenna switch 302 switches between transmission / reception of wireless LAN communication (or mobile phone wireless communication) and transmission / reception of RFID wireless communication, and is, for example, a high-frequency switch.

  The RFID tag 2 includes a tag antenna 2x that receives a signal from the RFID wireless communication unit 200 and transmits a signal to the RFID wireless communication unit 200, and a tag IC 2y. The tag IC 2y includes a tag modulator 2a that modulates a signal transmitted to the RFID wireless communication unit 200, a tag demodulator 2b that demodulates a signal received by the tag antenna 2x, and a tag storage unit 2c that stores data and the like. It is out.

  In the configuration shown in FIG. 12, when information is transmitted using a wireless LAN communication system (or mobile phone wireless communication system), the data input unit 107 of the wireless LAN communication unit (or mobile phone wireless communication unit) 100 is used. The carrier wave transmitted from the oscillator 101 is modulated by the modulator 102 by the input information signal, and the modulated signal is transmitted from the antenna unit 301 via the transmission amplifier 103 and the transmission / reception switch 104 via the antenna switch 302. To do. On the other hand, when information is received, the received signal received by the antenna unit 301 is demodulated from the antenna switch 302 via the transmission / reception switch 104 and the reception amplifier 105 by the demodulator 106, and the demodulated information signal is converted into data. Take out from the output unit.

  The operation of the above wireless LAN communication system (or mobile phone wireless communication system) is the same as the operation of a generally well-known wireless LAN communication system (or mobile phone wireless communication system). Omitted.

  FIG. 13 is a diagram for explaining writing / reading of information in the RFID wireless communication system.

  When information is written to the RFID tag 2 using the RFID wireless communication system, as shown in FIG. 13A, the transmitter 201 transmits the information using the write information W from the data input unit 207 of the RFID wireless communication unit 200. The modulated carrier wave H is modulated into a modulated signal S by the RFID modulator 202 and transmitted from the antenna unit 301 to the RFID tag 2 via the antenna switch 302 via the transmission amplifier 203 and the signal separator 204. In the RFID tag 2, as shown in FIG. 13B, the modulation signal S received by the tag antenna 2x is demodulated (envelope detection) by the tag demodulator 2b, and the demodulated reception data D is stored in the tag storage unit 2c. Write.

  On the other hand, when reading the information of the RFID tag 2, the carrier wave H transmitted by the oscillator 201 of the RFID wireless communication unit 200 passes through the RFID modulator 202, the transmission amplifier 203, and the signal separator 204 via the antenna switch 302. Transmit from the antenna unit 301.

  In the RFID tag 2, when the carrier wave H transmitted from the antenna unit 301 is received by the tag antenna 2 x, power is supplied. As shown in FIG. 13C, the stored information T is read from the tag storage unit 2 c and the reading is performed. Based on the stored information T, the tag modulator 2a modulates the tag antenna 2x by changing the impedance (ASK modulation). This modulation is performed by giving strength to the radio wave reflected by the tag antenna 2x by the carrier wave H transmitted from the RFID wireless communication unit 200 via the antenna unit 301. The modulated signal S thus modulated is returned from the antenna unit 301 to the RFID wireless communication unit 200 via the antenna switch 302.

  Here, for the sake of simplification, transmission / reception of information such as write information W and accumulated information T has been described. However, in actual communication, transmission / reception of commands according to the RFID communication protocol is also performed. The command transmission / reception is executed in the same manner as the data transmission / reception, and is realized by a generally known method, and thus the description thereof is omitted.

  In the RFID radio communication unit 200, the modulation signal S received from the antenna unit 301 from the RFID tag 2 is input to the RFID demodulator 206 via the signal separator 204, and the input modulation signal S is input to the RFID demodulator 206. After demodulation, the data is output from the data output unit 208. Note that when the modulated signal S from the RFID tag 2 is demodulated by the RFID demodulator 206, the local amplifier 205 is used. That is, the RFID demodulator 206 amplifies the carrier wave from the oscillator 201 by the local amplifier 205 and inputs the amplified carrier wave together with the modulation signal S from the RFID tag 2. As a result, the RFID demodulator 206 can reliably demodulate the modulation signal S from the RFID tag 2.

The above-described operation of the RFID wireless communication system is the same as that of a generally well-known RFID wireless communication system, and detailed description thereof is omitted.
[Problems with many duplicate parts]
As described above, when two wireless communication units, the wireless LAN communication unit (or the mobile phone wireless communication unit 100) and the RFID wireless communication unit 200, are installed to realize both functions, the respective wireless communication units Are mounted with an oscillator of the same frequency band (for example, 800 MHz to 900 MHz band or 2.4 GHz band). Then, an oscillator with a large mounting area and circuit scale (that is, high cost) in the RF circuit overlaps, and communication control is performed in the case of wireless LAN communication (or mobile phone wireless communication) and in the case of RFID wireless communication. Each circuit also has its own problem, and there is a problem that miniaturization is hindered. Furthermore, since the number of parts increases, there is a problem that power consumption increases accordingly.
[Problem that local radio amplifier is required for RFID wireless communication unit]
Further, in receiving RFID, since the signal at the RFID demodulator 206 becomes weak, the local amplifier 205 is necessary, which prevents miniaturization. It is conceivable to use a receiving amplifier instead of the local amplifier 205. In this case, however, there is a problem that transmission waves of the same frequency wrap around and stable reception cannot be performed (a so-called null point occurs).
[Problem that wireless LAN (or mobile phone) cannot be received during RFID communication]
In addition, as in the configuration illustrated in FIG. 12, when the antenna unit 301 is shared by using the antenna switch 302 such as a switch for wireless LAN communication (or mobile phone wireless communication) and RFID wireless communication, the antenna unit 301 is used. If the antenna switcher 302 is switched to the RFID wireless communication unit 200 side, wireless LAN communication (or mobile phone wireless communication) transmission / reception (especially reception depending on the other party side) cannot be performed during RFID communication. There's a problem. That is, in the RFID wireless communication, there is a large proportion of transmissions without data added (unmodulated) for power supply to the RFID tag 2, and during such communication, wireless LAN communication (or mobile phone wireless) is performed. (Communication) transmission / reception (especially reception whose communication timing depends on the other party) cannot be performed.
[Problem of which antenna switch to put under control]
Further, in the case where the antenna unit 301 is shared, from the viewpoint of miniaturization, the antenna switch 302 is controlled under either control with respect to the wireless LAN communication unit (or mobile phone wireless communication unit) 100 and the RFID wireless communication unit 200. There is a problem of whether or not to put it.

  That is, compared to RFID wireless communication, wireless LAN communication (or mobile phone wireless communication) is more prevalent in general households, and from the viewpoint of downsizing and cost reduction, the wireless LAN communication unit (or A wireless LAN module (or a mobile phone wireless communication module) obtained by modularizing the mobile phone wireless communication unit) 100 as a single component is a general-purpose product, and the antenna switch 302 is incorporated on the RFID wireless communication unit 200 side. This is a desirable form in terms of cost reduction.

  On the other hand, from the viewpoint of switching control between the wireless LAN communication unit (or mobile phone wireless communication unit) 100 and RFID wireless communication, an antenna switch is provided on the wireless LAN communication unit (or mobile phone wireless communication unit) 100 side. It is desirable to incorporate 302. For example, the wireless LAN communication unit (or mobile phone wireless communication unit) 100 has a problem that it is difficult to determine transmission / reception timing by itself for cooperation with other wireless LAN communication (or mobile phone wireless communication) devices and access points. In the RFID wireless communication unit 200, it is easier to determine the transmission / reception timing by itself compared to the wireless LAN communication unit (or mobile phone wireless communication unit) 100. For this reason, an antenna switch 302 is incorporated on the wireless LAN communication unit (or mobile phone wireless communication unit) 100 side, and the wireless LAN communication unit (or mobile phone wireless communication unit) 100 includes the antenna switch 302 at the time of transmission / reception. In the RFID wireless communication unit 200, forcible switching and transmission / reception using the interval are easier to control.

  Therefore, when incorporating the antenna switch 302 on the RFID wireless communication unit 200 side, there is a problem in terms of switching control, while the antenna switch 302 is incorporated on the wireless LAN communication unit (or mobile phone wireless communication unit) 100 side. In this case, there is a problem in terms of miniaturization and cost reduction, and any problem remains.

  In contrast to the conventional technology as described above, the following Patent Document 1 discloses a transmission source, transmission / reception separation between a bidirectional wireless communication unit that communicates with another wireless communication device and an inquiry unit that communicates with a wireless tag. And a wireless communication device that shares a common antenna for bidirectional wireless transmission / reception and wireless tag transmission / reception have been disclosed.

Further, Patent Document 2 below discloses a wireless communication apparatus that combines an RFID tag reader function and a wireless LAN communication function with a common RF block.
JP 2002-353852 A JP 2005-64822 A

  However, in the wireless communication device described in Patent Document 1, the device configuration can be reduced in size by commonly using a transmission source, a transmission / reception separator, a bidirectional wireless transmission / reception / radio tag transmission / reception common antenna, and the like. However, there is room for further miniaturization.

  FIG. 14 is a block diagram equivalently representing the block diagram shown in FIG. 1 of Patent Document 1 in order to facilitate the explanation of the wireless communication device described in Patent Document 1. In FIG. 14, the wireless LAN receiver (or mobile phone wireless receiver) 100 ′ uses an oscillator 101 ′, a reception amplifier 105 ′, and a demodulator 106 ′. The RFID wireless communication unit / wireless LAN transmission unit (or mobile phone wireless transmission unit) 200 ′ includes an oscillator 201 ′, a modulator 202 ′, a transmission amplifier 203 ′, a signal separator 204 ′, a local amplifier 205 ′, and a demodulation. A device 206 ′ is used. Among these components, the antenna unit 301 ′ and the antenna switch 302 ′ are shared components for RFID wireless communication and wireless LAN communication (or mobile phone wireless communication). The oscillator 201 ′, the modulator 202 ′, and the transmission amplifier 203 ′ are common parts for RFID wireless communication and wireless LAN transmission (or mobile phone wireless transmission).

  As shown in FIG. 14, the wireless communication device described in Patent Document 1 requires a local amplifier 205 ′ in the RFID wireless communication unit 200 ′, which hinders downsizing and cost reduction of the device configuration. . Also, since the antenna switch 302 'is used to share the antenna unit 301', the wireless LAN cannot be received during RFID communication. However, if a different frequency is used for wireless LAN transmission and wireless LAN reception and the antenna sharing method by frequency (frequency division duplex method FDD) is used, wireless LAN reception can be performed during RFID communication. Since it is necessary to use a different frequency for wireless LAN reception, two oscillators 101 ′ and 201 ′ are necessary as shown in FIG.

  Further, the wireless communication device described in Patent Document 1 does not use an existing wireless LAN (or mobile phone wireless communication) module.

  That is, wireless LAN (or mobile phone wireless communication) is also popular in general households. Therefore, the wireless LAN communication unit (or mobile phone wireless communication unit) used for it is inexpensive as an ultra-small integrated module product. Easy to obtain. However, in the prior art as described in Patent Document 1, an RFID is placed in the middle part (inside) of the circuit of “existing wireless LAN module (or mobile phone wireless communication module)” (see the part surrounded by a broken line in FIG. 14). Since it is necessary to insert a circuit, the existing wireless LAN module (or mobile phone wireless communication module) cannot be used as it is, and a wireless LAN (or mobile phone wireless communication) + RFID module is newly developed. There is a need. That is, it cannot be realized unless both RFID wireless communication and wireless LAN communication (or mobile phone wireless communication) technologies are possessed.

  The development of integrated devices (modules) in recent years has progressed in the division of labor, and even though there are many manufacturers that have either technology, few manufacturers have both technologies. For this reason, it is difficult to develop a wireless LAN (or mobile phone wireless communication) + RFID module.

  Moreover, in the wireless communication device described in Patent Document 1, there is a concern about an increase in the number of terminals of the high-frequency line.

  That is, the wireless LAN receiver (or mobile phone wireless receiver) 100 ′ and the RFID wireless communication unit / wireless LAN transmitter (or mobile phone wireless transmitter) 200 ′ are separately developed as a single module. However, the number of interconnections of the high-frequency lines increases, and the number of terminals of each module increases. This increase in the number of terminals of the high-frequency line hinders downsizing. Further, since the impedance changes depending on the wiring distance in the middle of the circuit, circuit design becomes difficult.

  In the wireless communication device described in Patent Document 1, simultaneous transmission and reception communication is not performed in wireless LAN communication.

  That is, as shown in FIG. 14, a wireless LAN receiver (or mobile phone wireless receiver) 100 ′ and an RFID wireless communication unit / wireless LAN transmitter (or mobile phone wireless transmitter) 200 ′ are connected to an antenna switch 302. Since the switch is made with ', both transmission and reception cannot be performed simultaneously when using a wireless LAN. However, as described above, if the frequency division duplex FDD is used, both transmission and reception can be performed at the same time. However, as described above, the two oscillators 101 ′ and 201 ′ are necessary, and the configuration of the apparatus increases. .

  On the other hand, in the wireless communication device described in Patent Document 2, although the RFID tag reader function and the wireless LAN communication function can be shared by a common RF block, a transmission / reception separator is used to separate a transmission wave and a reception wave by applying a magnetic field. Since a circulator is used, ferrite and a part for generating a magnetic field are necessary, and the apparatus configuration is enlarged.

  Accordingly, the present invention provides a wireless communication terminal device and an RFID capable of executing at least two types of wireless communication: first wireless communication (for example, mobile phone wireless communication and wireless LAN communication) and second wireless communication (for example, RFID wireless communication). The module can reduce the device configuration in size and cost, and can be used for existing wireless communication modules (for example, existing mobile phone wireless communication modules and existing wireless LAN modules). An object is to provide a wireless communication terminal device and an RFID module with a simple structure capable of suppressing the number.

  Another object of the present invention is to provide a wireless communication terminal device and an RFID module that can receive second wireless communication (for example, RFID wireless communication) without using a local amplifier.

  The present invention further provides a wireless communication terminal device capable of preventing the occurrence of inconvenience when the antenna unit is shared between the first wireless communication (for example, wireless LAN communication or mobile phone wireless communication) and the second wireless communication (for example, RFID wireless communication). Another object is to provide an RFID module.

  In order to solve the above problems, the present inventor has found the following. That is, in a wireless communication terminal device capable of performing at least two wireless communications of a first wireless communication (for example, wireless LAN communication or mobile phone wireless communication) and a second wireless communication (for example, RFID wireless communication), an oscillator, modulation A second wireless communication unit (for example, an RFID wireless communication unit) including a demodulator is provided between a first wireless communication unit (for example, a wireless LAN communication unit or a mobile phone wireless communication unit) including a transmitter and a transmission amplifier and an antenna unit. Thus, the second wireless communication unit can transmit and receive the second wireless communication via the antenna unit using the oscillator of the first wireless communication unit. Therefore, the oscillator of the first wireless communication unit can be shared as the oscillator of the second wireless communication unit, and the number of overlapping parts can be reduced accordingly, thereby reducing the size and cost of the apparatus configuration. And a simple configuration.

  Further, by providing the second wireless communication unit between the first wireless communication unit and the antenna unit, the first wireless communication unit and the second wireless communication unit can be divided into circuits. Therefore, an existing wireless communication module (for example, an existing mobile phone wireless communication module or an existing wireless LAN module) can be used as the first wireless communication unit.

  Further, by providing the second wireless communication unit between the first wireless communication unit and the antenna unit, the components of the second wireless communication unit are scattered as components of the first wireless communication unit. The second wireless communication unit can be configured as a single component without causing it to occur. Therefore, the number of terminals of the first wireless communication unit can be reduced as much as possible, and the number of terminals of the high-frequency line can be reduced accordingly, thereby reducing the size and cost of the apparatus configuration.

  Furthermore, the second wireless communication unit is provided between the first wireless communication unit and the antenna unit, and the second wireless communication unit uses the oscillator and the transmission amplifier of the first wireless communication unit. When performing transmission / reception of the second wireless communication via the antenna unit, the oscillator and the transmission amplifier of the first wireless communication unit can be shared as the oscillator and the transmission amplifier of the second wireless communication unit. Therefore, it is possible to reduce the number of overlapping parts, thereby reducing the size and cost of the apparatus configuration. Furthermore, the transmission amplifier of the first wireless communication unit can be shared as a local amplifier of the second wireless communication unit. Therefore, the second wireless communication can be received without using a local amplifier.

  Furthermore, by providing the second wireless communication unit between the first wireless communication unit and the antenna unit, an antenna switch that shares the antenna unit in the first wireless communication and the second wireless communication is provided. Without providing, the antenna unit can share an antenna that transmits and receives radio waves of the first wireless communication and an antenna that transmits and receives radio waves of the second wireless communication. Therefore, it is possible to prevent inconvenience when the antenna unit is shared between the first wireless communication and the second wireless communication.

The present invention is based on such knowledge, and in order to solve the above-described problems, the following first to third wireless communication terminal apparatuses are provided.
(1) Radio communication terminal apparatus according to the first aspect A radio communication terminal apparatus capable of executing at least two radio communications of a mobile phone radio communication using a mobile phone radio communication method and an RFID radio communication using an RFID radio communication method An antenna unit, a mobile phone wireless communication unit for performing transmission / reception of the mobile phone wireless communication, and an RFID wireless communication unit for performing transmission / reception of the RFID wireless communication, the mobile phone wireless communication unit Includes an oscillator, a modulator, and a transmission amplifier. The RFID wireless communication unit includes an RFID demodulator. The RFID wireless communication unit is provided between the antenna unit and the mobile phone wireless communication unit. The RFID radio communication unit transmits and receives the RFID radio communication via the antenna unit using the oscillator of the telephone radio communication unit. A wireless communication terminal device.
(2) Wireless communication terminal apparatus according to the second aspect: A wireless communication terminal apparatus capable of executing at least two types of wireless communication: wireless LAN communication using a wireless LAN wireless communication method and RFID wireless communication using an RFID wireless communication method. And an antenna unit, a wireless LAN communication unit for performing transmission / reception of the wireless LAN communication, and an RFID wireless communication unit for performing transmission / reception of the RFID wireless communication, wherein the wireless LAN communication unit includes an oscillator, The RFID wireless communication unit includes an RFID demodulator, the RFID wireless communication unit is provided between the antenna unit and the wireless LAN communication unit, and the wireless LAN communication unit includes the RFID wireless communication unit. The RFID wireless communication unit transmits and receives the RFID wireless communication through the antenna unit using an oscillator. Communication terminal device.
(3) Radio communication terminal device according to the third aspect At least two radios of the first radio communication using the first radio communication method and the second radio communication using the second radio communication method different from the first radio communication method A wireless communication terminal device capable of performing communication, wherein an antenna unit, a first wireless communication unit for transmitting and receiving the first wireless communication, and a second wireless communication for transmitting and receiving the second wireless communication The first wireless communication unit includes an oscillator, a modulator, and a transmission amplifier, the second wireless communication unit includes a demodulator, and is disposed between the antenna unit and the first wireless communication unit. The second wireless communication unit is provided, and the second wireless communication unit transmits and receives the second wireless communication through the antenna unit by using the oscillator of the first wireless communication unit. Wireless communication terminal device.

  According to the wireless communication terminal device of the first aspect of the present invention, the RFID wireless communication unit is provided between the antenna unit and the mobile phone wireless communication unit, and the oscillator of the mobile phone wireless communication unit is used. Since the RFID wireless communication unit transmits and receives the RFID wireless communication via the antenna unit, the structure is simple and the number of overlapping parts can be reduced, thereby reducing the size and cost of the apparatus configuration. In addition, existing mobile phone wireless communication modules (for example, general-purpose modules) can be used, and the number of terminals of the high-frequency line can be suppressed.

  In the radio communication terminal device according to the first aspect of the present invention, the RFID radio communication unit transmits and receives the RFID radio communication via the antenna unit using the oscillator and the transmission amplifier of the mobile phone radio communication unit. Preferably it is done. By doing so, it is possible to further reduce the number of overlapping parts, thereby realizing a reduction in the size and cost of the apparatus configuration, and it is possible to perform RFID reception without using a local amplifier.

  In the wireless communication terminal device according to the first aspect of the present invention, the antenna unit shares an antenna that transmits and receives radio waves of the mobile phone radio communication and an antenna that transmits and receives radio waves of the RFID radio communication. There may be. In this configuration, since the antenna unit can be shared without using an antenna switch, it is possible to prevent the occurrence of inconvenience when the antenna unit is shared for mobile phone wireless communication and RFID wireless communication.

  In this case, the RFID wireless communication unit further includes an RFID modulator and a directional coupler, and one side of the main line in the directional coupler is connected to the mobile phone wireless communication unit via the RFID modulator. In addition, it is possible to exemplify a mode in which the other side is connected to the antenna unit, and two high-frequency lines of sub-lines in the directional coupler are mixed with the RFID demodulator. In this aspect, the RFID radio communication unit is located between the RFID modulator and the mobile phone radio communication unit on the one main line of the directional coupler and on the other side of the directional coupler. Preferably, the main line further includes a phase shifter inserted into at least one of the directional coupler and the antenna unit.

  According to the wireless communication terminal device of the second aspect of the present invention, the RFID wireless communication unit is provided between the antenna unit and the wireless LAN communication unit, and the oscillator of the wireless LAN communication unit is used. Since the RFID wireless communication unit transmits and receives the RFID wireless communication via the antenna unit, the structure is simple and the number of overlapping parts can be reduced, thereby reducing the size and cost of the apparatus configuration. Existing wireless LAN communication modules (for example, general-purpose modules) can be used, and the number of terminals of the high-frequency line can be suppressed.

  In the wireless communication terminal device according to the second aspect of the present invention, the RFID wireless communication unit transmits and receives the RFID wireless communication through the antenna unit using the oscillator and the transmission amplifier of the wireless LAN communication unit. It is preferable. By doing so, it is possible to further reduce the number of overlapping parts, thereby realizing a reduction in the size and cost of the apparatus configuration, and it is possible to perform RFID reception without using a local amplifier.

  In the wireless communication terminal device according to the second aspect of the present invention, the antenna unit shares an antenna that transmits and receives radio waves for the wireless LAN communication and an antenna that transmits and receives radio waves for the RFID wireless communication. May be. In this configuration, since the antenna unit can be shared without using an antenna switch, it is possible to prevent inconvenience when the antenna unit is shared for wireless LAN communication and RFID wireless communication.

  In this case, the RFID wireless communication unit further includes an RFID modulator and a directional coupler, and one side of the main lines in the directional coupler is connected to the wireless LAN communication unit via the RFID modulator. In addition, it is possible to exemplify a mode in which the other side is connected to the antenna unit, and two high-frequency lines of sub-lines in the directional coupler are mixed with the RFID demodulator. In this aspect, the RFID wireless communication unit is disposed between the RFID modulator and the wireless LAN communication unit on the one main line of the directional coupler and on the other side of the directional coupler. It is preferable that the main line further includes a phase shifter inserted into at least one of the directional coupler and the antenna unit.

  In the wireless communication terminal device according to the first and second aspects of the present invention, the RFID wireless communication unit is configured such that the two sub-lines in the directional coupler are connected to the RFID demodulator, and the directional coupler It is preferable to further include a phase shifter inserted between the RFID demodulator.

  In the wireless communication terminal device according to the first and second aspects of the present invention, the RFID wireless communication unit includes a balanced / unbalanced conversion unit that converts a balanced line from the antenna unit into an unbalanced line, and a high-frequency matching. And a matching unit connected between both paths of the balanced / unbalanced conversion unit, and the high-frequency line converted into the unbalanced line by the balanced / unbalanced converting unit is the direction. It is preferable that it is connected to the other main line in the sex coupler.

  In this case, it further includes a matching state detecting unit that detects a matching state between the antenna unit and the balanced / unbalanced converting unit, and the matching unit includes a variable capacitance diode that adjusts an impedance of the antenna unit, and the variable unit An example of correcting the impedance of the antenna unit by varying the voltage applied to the capacitor diode based on the detection result of the matching state detection unit can be exemplified.

  According to the radio communication terminal device of the third aspect of the present invention, the second radio communication unit is provided between the antenna unit and the first radio communication unit, and the first radio communication unit includes the first radio communication unit. Since the second radio communication unit transmits and receives the second radio communication via the antenna unit using an oscillator, the structure is simple and the number of overlapping parts can be reduced, thereby reducing the size and cost of the apparatus configuration. The existing wireless communication module (for example, a general-purpose module) can be used, and the number of terminals of the high-frequency line can be suppressed.

  In the wireless communication terminal device according to the third aspect of the present invention, the second wireless communication unit is configured to transmit the second wireless communication via the antenna unit by the second wireless communication unit using the oscillator and the transmission amplifier of the first wireless communication unit. It is preferable to perform transmission / reception. In this way, it is possible to further reduce the number of overlapping parts, thereby realizing downsizing and cost reduction of the device configuration, and receiving the second wireless communication without using a local amplifier.

  In the wireless communication terminal device according to the third aspect of the present invention, the antenna unit shares an antenna that transmits and receives radio waves of the first wireless communication and an antenna that transmits and receives radio waves of the second wireless communication. It may be. In this configuration, since the antenna unit can be shared without using an antenna switch, it is possible to prevent inconvenience when the antenna unit is shared between the first wireless communication and the second wireless communication.

  The radio | wireless communication terminal device which concerns on this invention can illustrate the aspect in which the said RFID radio | wireless communication part is comprised as a single component.

  The present invention further provides an RFID module that is applied as the RFID wireless communication unit configured as a single component in the wireless communication terminal device according to the present invention.

  As described above, according to the present invention, wireless that can execute at least two wireless communications of the first wireless communication (for example, mobile phone wireless communication and wireless LAN communication) and the second wireless communication (for example, RFID wireless communication). It is a communication terminal device and an RFID module, and the device configuration can be reduced in size and cost, and an existing wireless communication module (for example, an existing mobile phone wireless communication module or an existing wireless LAN module) can be used. In addition, it is possible to provide a wireless communication terminal device and an RFID module with a simple structure that can suppress the number of terminals of the high-frequency line.

  Furthermore, according to the present invention, it is possible to provide a wireless communication terminal device and an RFID module that can receive second wireless communication (for example, RFID wireless communication) without using a local amplifier.

  Furthermore, according to the present invention, wireless communication that can prevent the occurrence of inconvenience when the antenna unit is shared between the first wireless communication (for example, wireless LAN communication or mobile phone wireless communication) and the second wireless communication (for example, RFID wireless communication). A terminal device and an RFID module can be provided.

  Hereinafter, an embodiment according to the present invention will be described with reference to the drawings. FIG. 1 is a schematic perspective view showing a wireless communication terminal device and an RFID tag according to an embodiment of the present invention. FIG. 1A is a wireless communication terminal device capable of performing wireless LAN communication and RFID wireless communication. FIG. 1 is a diagram showing a state where RFID wireless communication is performed with respect to an RFID tag (here, a personal computer), and FIG. 1B is a wireless communication terminal capable of performing mobile phone wireless communication and RFID wireless communication It is a figure which shows the state which is performing RFID radio | wireless communication with respect to an RFID tag by the apparatus (here mobile phone).

  2 is a schematic block diagram of the wireless communication terminal device shown in FIG. 1, and FIG. 2 (a) is a block diagram showing the wireless communication terminal device shown in FIG. 1 (a), and FIG. FIG. 2 is a block diagram showing the wireless communication terminal apparatus shown in FIG.

  FIG. 3 is a block diagram schematically showing a wireless LAN communication unit (or mobile phone wireless communication unit) and an RFID wireless communication unit in the wireless communication terminal device shown in FIGS. 1 and 2. Note that FIG. 3 shows a schematic block diagram for performing two wireless communications of wireless LAN communication (or mobile phone wireless communication) and RFID wireless communication in one figure. In the case of mobile phone wireless communication, the figure is shown in parentheses. Show. The same applies to FIG. 4 described later. In the following description, mobile phone wireless communication is shown in parentheses.

  The wireless communication terminal device 1 transmits / receives RFID wireless communication to / from the antenna unit 10 and a wireless LAN communication unit (or mobile phone wireless communication unit) 20 for transmitting / receiving wireless LAN communication (or mobile phone wireless communication). RFID wireless communication unit 30 for this purpose.

  The wireless communication terminal device 1 further includes a control unit 40 for controlling the wireless LAN communication unit (or mobile phone wireless communication) 20 and the RFID wireless communication unit 30.

  The control unit 40 includes a DSP (Digital Signal Processor) 41 and a storage unit 42. The storage unit 42 stores various control programs such as communication control and system control, and includes a ROM (Read Only Memory) and a RAM (Random Access Memory).

  The control unit 40 is configured to read various control programs from the storage unit 42 by the DSP 41 and execute the read control programs to perform the operation of the wireless communication terminal device 1.

  The DSP 41 performs communication control of the wireless LAN communication control unit (or mobile phone communication control unit) 411 for performing communication control of the wireless LAN communication unit (or mobile phone wireless communication unit) 20 and the RFID wireless communication unit 30. It functions as an RFID communication control unit 412.

  In the present embodiment, the DSP 41 further functions as an image processing unit 413 that performs image processing. The wireless communication terminal device 1 further includes a display unit 50 and an input operation unit 60, and is powered by a battery (for example, a storage battery) B.

  Specifically, the display unit 50 shown in FIG. 2A is for displaying the image output data from the image processing unit 413 of the control unit 40 in a liquid crystal display, and includes a first liquid crystal display unit 51 and a second liquid crystal display. Part 52. The display unit 50 shown in FIG. 2B is a liquid crystal display unit that displays image output data from the image processing unit 413 of the control unit 40 on a liquid crystal display.

  An input operation unit 60 shown in FIG. 2A is used to input information to the control unit 40, and here includes a touch panel unit 61 and a key operation unit 62. An input operation unit 60 shown in FIG. 2B is a key operation unit that inputs information to the control unit 40.

  The wireless LAN communication unit (or mobile phone wireless communication unit) 20 and the RFID wireless communication unit 30 are connected to the control unit 40. The wireless LAN communication unit (or mobile phone wireless communication unit) 20 inputs / outputs data to / from the control unit 40 from the data input unit 29a and the data output unit 29b. In addition, the RFID wireless communication unit 30 is configured to input / output data to / from the control unit 40 from the data input unit 39a and the data output unit 39b.

  In the present embodiment, the display unit 50 is connected to the output system of the control unit 40 so that the image output data from the image processing unit 413 is output from the control unit 40. The input unit 60 is connected to the input system of the control unit 40 so that input data that has been input is input to the control unit 40.

  By providing such a configuration, the wireless communication terminal device 1 operates by being supplied with power by the battery B connected to the control unit 40, is given an instruction from the input operation unit 60, and displays the terminal status and the like on the display unit 50. Information is displayed.

  The wireless communication terminal device 1 performs wireless LAN communication (or mobile phone wireless communication) by the wireless LAN communication control unit (mobile phone communication control unit) 411 of the control unit 40 and RFID wireless communication by the RFID communication control unit 412. Is supposed to do.

  As shown in FIG. 3, the wireless LAN communication unit (or mobile phone wireless communication unit) 20 includes an oscillator 21, a modulator (hereinafter referred to as a wireless LAN (or mobile phone) modulator) 22, and a transmission amplifier 23. . The RFID wireless communication unit 30 includes an RFID demodulator 32. Here, the RFID wireless communication unit 30 further includes an RFID modulator 31.

  Also, an RFID wireless communication unit 30 is interposed between the antenna unit 10 and the wireless LAN communication unit (or mobile phone wireless communication unit) 20. In the present embodiment, the wireless LAN communication unit (or mobile phone wireless communication unit) 20, the RFID wireless communication unit 30, and the antenna unit 10 are connected in this order to form a daisy chain. The wireless LAN communication unit (or mobile phone wireless communication unit) 20 is here an existing wireless LAN communication module (or an existing mobile phone wireless communication module).

  In this embodiment, the wireless communication terminal device 1 uses the oscillator 21 (here, the oscillator 21 and the transmission amplifier 23) of the wireless LAN communication unit (or mobile phone wireless communication unit) 20 to use the RFID wireless communication unit 30. Thus, the RFID wireless communication 30 is transmitted and received through the antenna unit 10.

  Specifically, the data input unit 29 a is connected to the DSP 41 of the control unit 40. The wireless LAN (or mobile phone) modulator 22 has an input side connected to the data input unit 29 a and an oscillator 21, and an output side connected to the input side of the transmission amplifier 23.

  In the present embodiment, the wireless LAN communication unit (or mobile phone wireless communication unit) 20 includes a reception amplifier 24 and a demodulator (hereinafter referred to as a wireless LAN (or mobile phone) demodulator) 25 in addition to the above configuration. Contains.

  The wireless LAN (or mobile phone) demodulator 25 has an input side connected to the output side of the receiving amplifier and the oscillator 21, and an output side connected to the data output unit 29b. The data output unit 29b is connected to the DSP 41 of the control unit 40.

  In the present embodiment, the wireless LAN communication unit (or mobile phone wireless communication unit) 20 further includes a transmission / reception switch 26 that switches between transmission and reception of wireless LAN communication (or mobile phone wireless communication). The transmission / reception switch 26 includes an input terminal unit 261, an output terminal unit 262, and a switching unit 263 that switches between the input terminal unit 261 and the output terminal unit 262. The input terminal unit 261 is connected to the output side of the transmission amplifier 23. The output terminal unit 262 is connected to the input side of the reception amplifier 24. The switching unit 263 is connected to the RF input unit 38 a of the RFID wireless communication unit 30.

  The transmission / reception switch 26 can take a transmission state in which the switching unit 263 is switched to the input terminal unit 261 side and a reception state in which the switching unit 263 is switched to the output terminal unit 262 side under the instruction of the control unit 40. It is like that.

  The RF input unit 38 a is connected to the antenna unit 10 via the main line 330. The data input unit 39 a connected to the control unit 40 is connected to the RFID modulator 31. The RFID demodulator 32 can receive RFID data on the main line 330 between the RFID modulator 31 and the antenna unit 10 on the input side, and the data output is connected to the control unit 40 on the output side. It is connected to the part 39b.

  In the RFID modulator 31, for example, the high frequency current of the RF input unit 38a is in a passing state when the data input unit 39a is energized, and the high frequency current of the RF input unit 38a is in a non-energized state from the data input unit 39a. This can be realized with a high frequency switch. A typical example of the high frequency switch is a PIN (P-Intrinsic-N) diode.

  For example, the PIN diode has a function of passing a high-frequency current from the RF input unit 38a when a current is supplied from the data input unit 39a and blocking a high-frequency current from the RF input unit 38a when the current from the data input unit 39a is stopped. Therefore, it can be used as a simple ASK (amplitude) modulator.

  As another RFID modulation method, for example, the switch 26 in FIG. 3 can be used as an RFID modulator. In this case, the RFID modulator 31 is unnecessary, and the signal 263 of the switch 26 of the communication unit 20 and the signal 331a of the directional coupler 33 are connected without passing through the RFID modulator 31. In addition, ASK (amplitude) modulation can be performed by various means capable of changing the amplitude of the transmission wave, such as turning on / off the power of the transmission amplifier 23, the oscillator 21, and the modulator 22.

  A typical example of the RFID demodulator 32 is a high frequency detector including a Schottky barrier diode.

  In the present embodiment, the antenna unit 10 is a single unit that shares an antenna that transmits and receives radio waves for wireless LAN communication (or mobile phone wireless communication) and an antenna that transmits and receives radio waves for RFID wireless communication. . The RFID wireless communication unit 30 further includes a directional coupler 33.

  Of the main line 330 in the directional coupler 33, one side 331 is connected to the wireless LAN communication unit (or mobile phone wireless communication unit) 20 via the RFID modulator 31, and the other side 332 is connected to the antenna unit 10. It is connected. Specifically, among the terminals connecting the main line 330 in the directional coupler 33, one (hereinafter referred to as an IN terminal) 331a is connected to the RFID modulator 31 by the main line 331 on one side, and the other (hereinafter referred to as the following). 332a (referred to as OUT terminal) is connected to the antenna unit 10 by the main line 332 on the other side.

  The two high frequency lines 334 and 335 of the sub line 333 in the directional coupler 33 are mixed with the RFID demodulator 32. Specifically, a terminal (hereinafter referred to as a TRM terminal) 334 a for connecting one high frequency line 334 of the sub line 333 of the directional coupler 33 is connected to the input side of the RFID demodulator 32 by the high frequency line 334. A terminal (hereinafter referred to as a CPL terminal) 335 a for connecting the other high-frequency line 335 is connected to the input side of the RFID demodulator 32.

  The directional coupler 33 is a coupler in which the length of the coupling line 336 provided adjacent to the main line 330 of the sub line 333 is ¼ (λ / 4) of the input signal wavelength λ, and the wireless LAN communication unit (Or a mobile phone wireless communication unit) A part of a signal input from the antenna 20 or a part of a signal input from the antenna unit 10 can be taken out.

  That is, the directional coupler 33 is a four-terminal circuit including an IN terminal 331a and an OUT terminal 332a connected to the main line 330, and a TRM terminal 334a and a CPL terminal 335a connected to the coupling line 336. An input signal from the terminal 331a is output to the OUT terminal 332a and the CPL terminal 335a, but is not substantially output to the TRM terminal 334a, and an input signal from the OUT terminal 332a is output to the IN terminal 331a and the TRM terminal. While being output to 334a, it is a coupler that does not substantially output to CPL terminal 335a. By doing so, the signal from the wireless LAN communication unit (or mobile phone wireless communication unit) 20 and the signal from the antenna unit 10 are RFID demodulated through the high frequency line 334 on one side and the high frequency line 335 on the other side, respectively. Can be mixed in the vessel 32.

  As described above, the RFID wireless communication unit 30 mixes both outputs of the coupling line 336 in the directional coupler 33 with the RFID demodulator 32, so that the signal from the antenna unit 10 and the wireless LAN communication unit (or mobile phone) are mixed. It is possible to perform direct conversion reception by mixing the local oscillation signal from the telephone radio communication unit) 20 and extracting it directly as a received signal.

  FIG. 4 is a block diagram showing a schematic configuration of the RFID wireless communication unit 30 shown in FIG. In the present embodiment, the RFID wireless communication unit 30 is connected between the RFID modulator 31 and the wireless LAN communication unit (or mobile phone wireless communication unit) 20 on the main line 331 on one side of the directional coupler 33, and The main line 332 on the other side of the directional coupler 33 further includes a phase shifter that is inserted into at least one of the directional coupler 33 and the antenna unit 10.

  Here, the RFID wireless communication unit 30 includes a first phase shifter 34 a interposed between the IN terminal 331 a in the directional coupler 33 and the wireless LAN (or mobile phone wireless communication unit) 20, and the directional coupler 33. 2 further includes a second phase shifter 34b interposed between the OUT terminal 332a and the antenna unit 10.

  The first phase shifter 34 a is a phase shifter for preventing the reflected wave generated by the RFID modulator 31 from entering the transmission amplifier 23 in the wireless LAN (or mobile phone wireless communication unit) 20. The first phase shifter 34 a is adjusted so that the reflected wave generated by the RFID modulator 31 does not enter the transmission amplifier 23. For example, the electrical length from the input section of the transmission amplifier 23 to the RFID modulator 31 can be set to a length such as 0.75λ, 1.25λ, or 1.75λ.

  The second phase shifter 34b may be for preventing a transmission wave from being reflected by the antenna unit 10 and being mixed again into the directional coupler 33, or from the RFID tag 2 via the antenna unit 10. It may be for changing the phase of the received wave.

  When the second phase shifter 34b is for preventing remixing of the transmission wave into the directional coupler 33, the round trip waves cancel each other at the reception output (TRM terminal 334a) of the directional coupler 33. The second phase shifter 34b is adjusted. For example, the electrical length from the OUT terminal 332a of the directional coupler to the antenna unit 10 is set to a length such as 0.75λ, 1.25λ, or 1.75λ, so that the directional coupler 33 is directed to the antenna unit 10. The traveling wave and the reflected wave from the antenna unit 10 cancel each other, and the round-trip wave does not substantially leak to the TRM terminal side 334a of the directional coupler 33.

  On the other hand, when the second phase shifter 34b is for changing the phase of the received wave from the RFID tag 2, at the maximum communication distance of the RFID wireless communication unit 30 (see d (for example, 40 mm) in FIG. 5 described later). The second phase shifter 34b is adjusted so that there is no phase in which the transmitted wave and the received wave cancel each other (that is, the phase where the received wave from the RFID tag 2 cannot be read (null point)).

  In the present embodiment, the RFID radio communication unit 30 includes two high-frequency paths 334 and 335 in the directional coupler 33 connected to the RFID demodulator 32, and the directional coupler 33 and the RFID demodulator 32. And a third phase shifter 34c interposed between the first and second phase shifters.

  The third phase shifter 34 c is a phase shifter for improving the performance of the directional coupler 33. Specifically, the third phase shifter 34c is configured to isolate the local output (CPL terminal 335a) of the directional coupler 33 from the reception output (TRM terminal 334a) (leakage from the IN terminal 331a to the TRM terminal 334a or the OUT terminal). This is a phase shifter for ensuring leakage from 332a to the CPL terminal 335a. For example, when the electrical length from the CPL terminal 335a to the TRM terminal 334a in the directional coupler 33 is 0.25λ, the electrical length between the third phase shifter 34c and the RFID demodulator 32 is 0.25λ, By setting the length to .25λ or the like, the phase from the TRM terminal 334a to the CPL terminal 335a is canceled, so that the isolation of the directional coupler 33 can be increased.

  The lengths of the first to third phase shifters 34a to 34c can be adjusted as appropriate according to the dielectric constants of the components used and the substrate.

  Further, the first to third phase shifters 34a to 34c may be variable phase shifters configured so that the phase changes according to the voltage.

  For example, a variable phase shifter is used as the first phase shifter 34a and the phase is changed according to the length of the high-frequency line between the RFID wireless communication unit 30 and the wireless LAN communication unit (or mobile phone wireless communication unit) 20. Can do. In addition, a variable phase shifter can be used for the second phase shifter 34 b and the phase can be changed according to the length of the high-frequency line between the RFID wireless communication unit 30 and the antenna unit 10. In this way, the same RFID wireless communication unit 30 can be used with various terminal devices (models).

  By the way, the line of the RF circuit in the RFID wireless communication unit 30 is an unbalanced line that operates with a potential difference from GND (ground) on the substrate. Therefore, if the antenna is fed through the unbalanced line, the board GND and the antenna element are fed, and the antenna directivity (radiation direction) is largely governed by the board shape. For this reason, it is preferable that the RF circuit line in the RFID wireless communication unit 30 is a balanced line that does not depend on the potential difference between the power supply to the antenna and the GND of the substrate, and power is supplied to the two antenna elements in a balanced manner. From this point of view, in the present embodiment, the RFID radio communication unit 30 converts the unbalanced line (main line) 330 from the RFID modulator 31 into balanced lines 351 and 352 to the antenna unit 10. It further includes a conversion unit 35 and matching means 36 for performing high-frequency matching of the balanced / unbalanced conversion unit 35. A matching means 36 is connected between the paths 351 and 352 on the balanced side of the balanced / unbalanced conversion unit 35. A high frequency line 353 converted to an unbalanced line by the balanced / unbalanced conversion unit 35 is connected to the main line 330.

  In the present embodiment, the balanced / unbalanced conversion unit 35 is a balanced / unbalanced converter provided for balanced feeding (feeding with the same power and opposite phase) to the antenna unit 10. Specifically, the antenna unit 10 here is a dipole antenna in which two antenna elements 11 and 12 are respectively connected to two feeding points 10a and 10b along a predetermined linear direction. In the balanced / unbalanced conversion unit 35, two balanced lines 351 and 352 are connected to the feeding points 10a and 10b of the antenna unit 10, respectively, and the unbalanced line 353 is connected to the other side of the directional coupler 33. It is connected to the line 332.

  By the balanced power supply (same power and opposite phase power supply) by the balanced / unbalanced conversion unit 35, the radiation direction of the antenna unit 10 can be made perpendicular to the antenna elements 11 and 12 (arrow X direction in the figure). it can.

  This will be described in more detail with reference to FIG. 5. FIG. 5 shows an antenna unit 10, a wireless LAN communication unit (or mobile phone wireless communication unit) 20 and an RFID wireless communication unit mounted on the wireless communication terminal device 1. 30 is a schematic diagram illustrating an arrangement example of a tag antenna 2x and a tag IC 2y mounted on the RFID tag 2.

  As shown in FIG. 5, the antenna unit 10 and the tag antenna 2x are both configured as meander line antennas.

  The antenna unit 10 and the tag antenna 2x are fed from the center of the antenna to the two antenna elements 11 and 12 and the antenna elements 21x and 22x along the vertical direction in the figure. Thereby, the antenna directivity can be oriented in the horizontal direction X in the figure.

  For example, since the directivity of the wireless communication terminal device 1 is likely to change due to the influence of other functional components such as the liquid crystal display unit 50, the target directivity can be obtained by balanced feeding to the antenna.

  On the RFID tag 2 side, an auxiliary element 2z that is parallel to the meander-line antenna elements 21x and 22x and perpendicular to the antenna element surface may be mounted to adjust the impedance of the tag IC 2y. By doing so, the two elements 21x and 22x on the upper and lower sides act in the direction in which they are coupled, so that an effect equivalent to inserting a capacitor + inductor in parallel with the tag IC 2y is obtained. The meander line also operates as a series inductor, and the inductance can be set by changing the length. Further, the capacitance of the capacitor connected in series to the auxiliary element can be set by the distance between the meander line and the auxiliary element. Further, the auxiliary element acts as an inductor connected in series with this variable capacitor. In this way, the variable series inductor and the variable capacitor and inductor already connected in series are connected in parallel, so that the impedance can be freely set.

Next, transmission / reception operations of the wireless LAN communication unit (or mobile phone wireless communication unit) 20 and the RFID wireless communication unit 30 will be described below.
[Transmission operation of wireless LAN communication unit (or mobile phone wireless communication unit) 20]
When transmitting wireless LAN communication (or mobile phone wireless communication), the transmission / reception switch 26 is switched to the transmission amplifier 23 side according to an instruction from the control unit 40. A high-frequency signal having a predetermined frequency (for example, 2.4 GHz) is generated by the oscillator 21, and the wireless LAN is generated by data input from the wireless LAN communication control unit (mobile phone communication control unit) 411 via the data input unit 29 a. Modulation is performed by the modulator 22 (or mobile phone). The transmission signal modulated by the modulator 22 is transmitted (radiated) from the antenna unit 10 via the transmission amplifier 23, the transmission / reception switch 26, and the RFID wireless communication unit 30.
[Reception Operation of Wireless LAN Communication Unit (or Mobile Phone Wireless Communication Unit) 20]
When receiving wireless LAN communication (or mobile phone wireless communication), the transmission / reception switch 26 is switched to the reception amplifier 24 side according to an instruction from the control unit 40. The reception signal received by the antenna unit 10 is amplified by the reception amplifier 24 via the RFID wireless communication unit 30 and the transmission / reception switch 26. Further, the reception signal amplified by the reception amplifier 24 and a high frequency signal of a predetermined frequency (for example, 2.4 GHz) input from the oscillator 21 are mixed by the wireless LAN (or mobile phone) demodulator 25. The reception data mixed by the demodulator 25 is output to the wireless LAN communication control unit (cellular phone communication control unit) 411 via the data output unit 29b.

When the wireless LAN communication unit (or mobile phone wireless communication unit) 20 performs a transmission / reception operation, the RFID wireless communication unit 30 transmits a transmission signal from the wireless LAN communication unit (or mobile phone wireless communication unit) 20 and an antenna unit. The received signal from 10 is passed as it is. Thus, an existing module can be used as the wireless LAN communication unit (or mobile phone wireless communication unit) 20.
[Transmission operation of RFID wireless communication unit 30]
When transmitting the RFID wireless communication, the transmission / reception switch 26 is switched to the transmission amplifier 23 side in the wireless LAN communication unit (or mobile phone wireless communication unit) 20 according to an instruction from the control unit 40, The unmodulated wave is amplified by the transmission amplifier 23 via the modulator 22. The unmodulated wave amplified by the transmission amplifier 23 is input to the RF data input unit 38 a of the RFID wireless communication unit 30. The unmodulated wave input from the RF data input unit 38a is modulated by the RFID modulator 31 by the data input from the RFID communication control unit 412 of the control unit 40 via the data input unit 39a (here, ASK modulation). ). The transmission signal modulated by the RFID modulator 31 is transmitted (radiated) from the antenna unit 10 via the directional coupler 33.
[Reception Operation of RFID Wireless Communication Unit 30]
When receiving RFID wireless communication, the wireless LAN communication unit (or mobile phone wireless communication unit) 20 via the RF input unit 38a is used to supply power to the RFID tag 2 according to an instruction from the control unit 40. Unmodulated waves continue to be emitted. That is, both unmodulated transmission and reception from the RFID tag 2 are performed simultaneously. Therefore, when receiving the RFID wireless communication, the RFID wireless communication unit 30 receives an unmodulated wave from the RF data input unit 38a.

  As described above, the directional coupler 33 is a device that outputs a part of power input from the IN terminal 331a to the CPL terminal 335a and outputs a part of power input from the OUT terminal 332a to the TRM terminal 334a. is there. Therefore, in the directional coupler 33, the signal is amplified by the transmission amplifier 23 of the wireless LAN communication unit (or mobile phone wireless communication unit) 20 and input from the RF data input unit 38 a through the RFID modulator 31 without being modulated. A part of the unmodulated wave is output from the CPL terminal 335a. A part of the received signal received by the antenna unit 10 is output from the TRM terminal 334a.

  The unmodulated signal and the received signal output from the directional coupler 33 are mixed and demodulated (detected) by the RFID demodulator 32. The reception data of the RFID wireless communication demodulated by the RFID demodulator 32 is output to the RFID communication control unit 412 of the control unit 40 via the RF data output unit 39a.

  In the transmission / reception operation of the RFID wireless communication unit 30, the signal amplified by the transmission amplifier 23 (that is, a certain amount of power) is input to the RFID modulator 31. Therefore, the power amplified by the transmission amplifier 23 can be allowed. In the reception operation of the RFID wireless communication unit 30, the RFID demodulator 32 receives unmodulated waves amplified by the transmission amplifier 23 of the wireless LAN communication unit (or mobile phone wireless communication unit) 20 at the antenna unit 10. Since it is input together with the received reception signal, RFID reception can be performed without using a local amplifier.

The wireless communication terminal device 1 according to the embodiment of the present invention described above has the following advantages. That is,
[Realization of downsizing and cost reduction of equipment configuration]
The RFID wireless communication unit 30 can share and use blocks in the wireless LAN communication unit (or mobile phone wireless communication unit) 20 such as the oscillator 21 having a large circuit scale and the transmission amplifier 23. As a result, the development efficiency, size reduction, and cost reduction of the wireless communication terminal device 1 can be realized.
[Diversion of existing wireless LAN module (or mobile phone wireless communication module)]
By providing the RFID wireless communication unit 30 between the wireless LAN communication unit (or mobile phone wireless communication unit) 20 and the antenna unit 10, the wireless LAN communication unit (or mobile phone wireless communication unit) 20 and the RFID wireless communication unit 30 are provided. Therefore, the wireless LAN communication unit (or mobile phone wireless communication unit) 20 can be realized by an existing wireless LAN module (or mobile phone wireless communication module).
[Function blocks in the RFID wireless communication unit 30 can be configured with simple parts]
The RFID wireless communication unit 30 can be configured with only very simple functional blocks. As an example, as described above, the RFID modulator 31 includes, for example, a PIN diode, the RFID demodulator 32 includes, for example, a Schottky barrier diode, and the directional coupler 33 includes, for example, An RFID module of several mm square can be realized if it is configured by wiring in a multilayer substrate such as LTCC (Low Temperature Co-fired Ceramic) of about 1 mm square. Thereby, size reduction and cost reduction of an apparatus structure are realizable. In addition, a wireless LAN module (or a mobile phone wireless communication module) integrated with semiconductor technology and an RFID module with a multilayer substrate or mounting technology can be realized by division of labor.
[Minimization of high-frequency wiring]
The RFID wireless communication unit 30 can be inserted between the wireless LAN communication unit (or mobile phone wireless communication unit) 20 and the antenna unit 10, and is scattered as peripheral components of the wireless LAN communication unit (or mobile phone wireless communication unit) 20. Therefore, modularization of the RFID wireless communication unit 30 can be realized. Since the number of terminals of the wireless LAN module (or mobile phone wireless communication module) is very small, it does not hinder downsizing of the components of the RFID wireless communication unit 30. As a result, it is possible to reduce the size of the apparatus by reducing the number of terminals.
[Mountability to wireless communication terminals]
In the conventional wireless communication terminal device, in order to mount a plurality of modules on the substrate of the wireless communication terminal device, it is necessary to consider the design of the interconnected high-frequency wiring, and there is a sense of resistance for the system designer. . However, in the wireless communication terminal device 1 according to the embodiment of the present invention, the wireless LAN communication unit (or mobile phone wireless communication unit) 20, the RFID wireless communication unit 30, and the antenna unit 10 can be connected through one path. As a result, only two high-frequency wirings can be provided, and design considerations of the wireless communication terminal device 1 are drastically reduced. Thereby, the efficiency of the development of the wireless communication terminal device 1 can be improved.
[No need for local amplifier]
Since the local amplifier of the RFID wireless communication unit 30 is shared with the transmission amplifier 23 of the wireless LAN communication unit (or mobile phone wireless communication unit) 20, the local amplifier becomes unnecessary.
[Preventing abnormal output from the transmission amplifier]
In the conventional wireless communication terminal device, the high-frequency impedance changes when the amplitude is small in AM modulation, and the transmission amplifier may oscillate at this time. At this time, if the modulation is performed before the transmission amplifier, the oscillation of the transmission amplifier leaks to the outside. However, in the wireless communication terminal device 1 according to the embodiment of the present invention, for example, RFID modulation by an RFID modulator such as a high frequency switch is performed after the transmission amplifier 23. Therefore, even if the transmission amplifier 23 oscillates, the RFID modulator Since it does not leak outside when it is off, the impact on other communication devices can be mitigated.
[No power supply for RFID wireless communication unit 30 is possible]
The RFID wireless communication unit 30 uses a transmission signal of the wireless LAN communication unit (or mobile phone wireless communication unit) 20 at the time of transmission, and at the time of reception, the RFID demodulator is used as a high frequency detector (for example, a Schottky). Therefore, it is possible to realize no power supply for the high-frequency circuit unit of the RFID wireless communication unit 30. In addition, since the RFID wireless communication unit 30 can be powered off in this way, the number of terminals of the RFID wireless communication unit 30 can be reduced, and the RFID module can be downsized. In addition, the RFID wireless communication unit 30 that does not require a power supply does not require an external power supply even in a production inspection facility when performing a production inspection, and thus can reduce costs by reducing inspection items. Furthermore, since power is supplied only to the wireless LAN communication unit (or mobile phone wireless communication unit) 20 side, low power consumption can be realized. By sharing parts, the wireless LAN communication unit (or mobile phone wireless communication unit) 20 operates during operation of the RFID wireless communication unit 30, thereby reducing the number of redundant parts and reducing power consumption. It can be said that.
[A wireless LAN communication unit (or mobile phone wireless communication unit) 20 capable of simultaneous transmission and reception can be used]
Since there is no switch on the RFID wireless communication unit 30 side, the wireless LAN communication unit (or mobile phone wireless communication unit) 20 that can be executed simultaneously with transmission and reception can be supported.
[Receiving wireless LAN communication (or mobile phone wireless communication) in part during RFID wireless communication]
Transmission / reception of wireless LAN communication (or mobile phone wireless communication) can be performed while receiving RFID or supplying power to the RFID tag 2. Although the reception timing of wireless LAN communication (or mobile phone wireless communication) is irregular, the probability that wireless LAN communication (or mobile phone wireless communication) can be received in this way is improved. This leads to improved communication (or mobile phone wireless communication) performance.

  Next, a specific circuit configuration of the RFID wireless communication unit 30 will be described below with reference to FIG. 6 is a diagram illustrating an example of an electric circuit of the RFID wireless communication unit 30 illustrated in FIG.

  Here, the RFID modulator 31 includes a PIN diode 311. Specifically, the PIN diode 311 has an anode side connected to a main line 331 between the IN terminal 331a and the RF data input unit 38a via a capacitor C1, and a cathode side grounded. In the main line 331 on one side, a first phase shifter 34a is interposed between the IN terminal 331a of the directional coupler 33 and the RF input unit 38a.

  The data input unit 39a is connected to a line between the capacitor C1 and the PIN diode 311 via a resistor R1. One end of a capacitor C2 whose other end is grounded is connected to the line between the data input section 39a and the resistor R1.

  In the RFID modulator 31 configured as described above, when a voltage is applied to the data input unit 39a, the PIN diode 311 is short-circuited in terms of high frequency, and a high-frequency signal input from the RF input unit 38a is blocked to prevent the antenna from entering. The signal is not output from the unit 10. By this action, the amplitude of the high frequency signal can be modulated (ASK modulation).

  As described above, the directional coupler 33 is a device that outputs a part of power input from the IN terminal 331a to the CPL terminal 335a and outputs a part of power input from the OUT terminal 332a to the TRM terminal 334a. .

  Here, the RFID demodulator 32 includes a Schottky barrier diode 321. Specifically, the Schottky barrier diode 321 here is composed of a pair of diodes 321a and 321b connected in series in the same direction. The Schottky barrier diode 321 has a cathode side connected to a CPL terminal 335a in the directional coupler 33 via an inductor L1 and a capacitor C3, and an anode side grounded. A TRM terminal 334a of the directional coupler 33 is connected between the pair of diodes 321a and 321b via an inductor L2. A third phase shifter 34c is interposed between the CPL terminal 335a of the directional coupler 33 and the capacitor C3 in the other high-frequency line 335.

  One end of a capacitor C4 and a resistor R2 is connected to the line between the inductor L1 and the capacitor C3. The other ends of the capacitor C4 and the resistor R2 are grounded. One end of an inductor L3 having the other end grounded is connected between the third phase shifter 34c and the capacitor C3.

  The data output unit 39b is grounded via the capacitor C5. One end of the inductor L4 is connected to the line between the Schottky barrier diode 321 and the inductor L2. The other end of the inductor L4 is connected to a line between the data output unit 39b and the capacitor C5. One end of a resistor R3 whose other end is grounded is connected to the line between the inductor L4 and the data output unit 39b.

  In the RFID demodulator 32 configured as described above, upon reception of RFID wireless communication, the wireless LAN communication unit (or mobile phone wireless communication unit) 20 transmits to the transmission coupling side of the directional coupler 33 (from the CPL terminal 335a to the third phase). A part of a high-power unmodulated wave equal to the transmission output is input to the Schottky barrier diode 321 (two diodes 321a and 321b) as a local signal via the device 34c), and the Schottky barrier diode 321 is predetermined. ON / OFF is repeated at a high frequency period (for example, 2.4 GHz).

  Further, a part of the received signal is mixed from the antenna unit 10 via the reception coupling side (TRM terminal 334a) of the directional coupler 33 to the intermediate point of the Schottky barrier diode 321 (two diodes 321a and 321b). . As a result of the reception signal being mixed with the local oscillation signal in this way, only the reception signal that is repeatedly turned ON / OFF in the same cycle as the non-modulated wave input as the local oscillation signal is output and passed through the inductor L4. And output from the data output unit 39b.

  The RFID demodulator 32 shown in FIG. 6 has one output (data output unit 39b) on the output side. However, from the viewpoint of improving reception performance, the RFID demodulator 32 may be a quadrature demodulator with two outputs on the output side. Good.

  FIG. 7 is another example of the electric circuit of the RFID wireless communication unit 30 shown in FIG. 6, and is an electric circuit diagram in the case where the RFID demodulator is an orthogonal demodulator 32 '.

  As shown in FIG. 7, the RFID demodulator 32 ′ is composed of two Schottky barrier diodes 321 and 321 ′, and has two powers having the same power and different phases of 90 ° on the output side. A hybrid coupler (3 dB directional coupler) 37 that outputs a signal is further included. Specifically, the RFID demodulator 32 ′ is the same as that shown in FIG. 6 except for the circuit configuration of the other Schottky barrier diode 321 ′ and the hybrid coupler 37 among the circuit configurations of the two Schottky barrier diodes 321 and 321 ′. The configuration is the same as the RFID demodulator 32 shown in FIG.

  One OUT terminal 371a of the hybrid coupler 37 is connected between the pair of diodes 321a and 321b in one Schottky barrier diode 321 via an inductor L2. The CPL terminal 375a of the hybrid coupler 37 is connected to the TRM terminal 334a of the directional coupler 33 via the capacitor C6 and the high frequency line 334 on one side.

  The other Schottky barrier diode 321 'has the same configuration as the circuit configuration on the one Schottky barrier diode 321 side described above.

  In other words, the other Schottky barrier diode 321 'is composed of a pair of diodes 321a' and 321b 'connected in series in the same direction. The Schottky barrier diode 321 'has a cathode side connected to a line between the capacitor C3 and the inductor L3 via an inductor L1' and a capacitor C3 ', and an anode side grounded. The other OUT terminal 372a of the hybrid coupler 37 is connected between the pair of diodes 321a 'and 321b' via an inductor L2 '.

  A capacitor C4 'and one end of a resistor R2' are connected to the line between the inductor L1 'and the capacitor C3'. The other ends of the capacitor C4 'and the resistor R2' are grounded.

  The other data output unit 39b 'is grounded via a capacitor C5'. One end of the inductor L4 'is connected to the line between the Schottky barrier diode 321' and the inductor L2 '. The other end of the inductor L4 'is connected to a line between the other data output unit 39b' and the capacitor C5 '. One end of a resistor R3 'whose other end is grounded is connected to the line between the inductor L4' and the data output unit 39b.

  The TRM terminal 374a of the directional coupler 33 is grounded via the capacitor C7 and the resistor R4.

  In the RFID demodulator 32 ′ configured as described above, when receiving the RFID wireless communication, the wireless LAN communication unit (or mobile phone wireless communication unit) 20 transmits to the transmission coupling side of the directional coupler 33 (from the CPL terminal 335a to the third one. A part of a high-power unmodulated wave equal to the transmission output is input to the two Schottky barrier diodes 321 and 321 ′ as a local oscillation signal via the phase shifter 34c).

  By the way, since the Schottky barrier diodes 321 and 321 'are switched with high-frequency signals, reception signals mixed in the same phase are strengthened, and reception signals mixed in different phases are weakened. When the received signal is weakened, the received signal cannot be extracted from either the data output unit 39b or the other data output unit 39b '.

  For this reason, in the circuit example shown in FIG. 7, the RFID demodulator constitutes an orthogonal demodulator. That is, a part of the received signal is separated into orthogonal received signals by the hybrid coupler 37 from the antenna unit 10 via the receiving coupling side (TRM terminal 334a) of the directional coupler 33, and each of the two shots is separated. It is mixed at the midpoint of the key barrier diodes 321 and 321 ′. In this way, the reception signal is mixed with the local signal, so that the reception signal is taken out from either the data output unit 39b or the other data output unit 39b ′ regardless of the phase of the mixed signal. be able to.

  In the circuit configuration shown in FIG. 7, the received signal can be extracted from either the data output unit 39b or the other data output unit 39b ′ regardless of the phase of the mixed signal. When the two-phase shifter 34b is used to change the phase of the received wave received from the RFID tag 2 via the antenna unit 10, the second phase shifter 34b can be omitted. Further, if the communication distance d (see FIG. 5) with the RFID tag 2 is relatively short, the range in which the reception phase can be taken is small. Therefore, when the second phase shifter 34b is provided, the second phase shifter 34b and the third phase shifter 34b Since the occurrence of a null point can be avoided by adjusting the electrical length of the phase shifter 34c, a circuit configuration as shown in FIG. 6 is preferable from the viewpoint of simplification of the device configuration, size reduction, and cost reduction. .

  As shown in FIGS. 6 and 7, the matching means 36 is a matching circuit including an inductor L5 and a capacitor C8 here.

  Specifically, one of the two feeding points 10a and 10b of the antenna unit 10 (here, one feeding point 10a) is connected to one balanced side terminal 35a of the balanced / unbalanced converting unit 35 via the capacitor C8. It is connected. One end of an inductor L5 is connected to a line between one balanced side terminal 35a of the balanced / unbalanced converting unit 35 and the capacitor C8. The other end portion of the inductor L5 is connected to a line between the other balanced side terminal 35b of the balanced / unbalanced converting portion 35 and the other feeding point 10b. A second phase shifter 34 b is interposed between the OUT terminal 332 a of the directional coupler 33 and the balanced / unbalanced converter 35 in the other main line 332.

  In the present embodiment, the RFID wireless communication unit 30 adjusts the high-frequency matching of the balanced / unbalanced converting unit 35.

  FIG. 8 is a diagram for explaining the adjustment of the high-frequency matching of the balanced / unbalanced conversion unit 35. FIG. 8A is a schematic side view of the wireless communication terminal device 1 that performs wireless LAN communication and RFID wireless communication. FIG. 8B is a schematic plan view of the wireless communication terminal device 1. 8 shows the wireless communication terminal device 1 that performs wireless LAN communication and RFID wireless communication, the same applies to the wireless communication terminal device 1 that performs mobile phone wireless communication and RFID wireless communication. Therefore, illustration of this is omitted.

  The wireless communication terminal device 1 includes an antenna unit 10, a wireless LAN communication unit (or a mobile phone wireless communication unit) 20, and a movable unit 70 having an RFID wireless communication unit 30, and a main body unit 80 that supports the movable unit 70 so as to be opened and closed. Is further provided.

  Specifically, the movable part 70 is an openable type. In addition to the antenna unit 10, the wireless LAN communication unit (or mobile phone wireless communication unit) 20, and the RFID wireless communication unit 30, the movable unit 70 includes a first liquid crystal display unit 51 here. The main body 80 includes a main substrate 81 on which the second liquid crystal display unit 52, the touch panel 61, the key operation unit 62 are mounted, and the battery B.

  When the wireless communication terminal device 1 is not in use, the movable portion 70 is closed to enter a standby state, but when in use, the movable portion 70 is opened from the main body portion 80 (so that the liquid crystal display portions 51 and 52 can be seen here). To use.

  By the way, when the movable part 70 is closed, the antenna part 10 is approaching the main body part 70. On the other hand, when the movable part 70 is open, it is separated from the main body part 70. The impedance of the antenna unit 10 changes in these two states. That is, when the movable unit 70 is closed (for example, in a standby state), the antenna unit 10 may approach the main body unit 80 (for example, the main board 81) and the antenna unit 10 may not operate. Then, wireless LAN communication (or mobile phone wireless communication) and RFID wireless communication cannot be used.

  In order to prevent this, the wireless communication terminal device 1 according to the embodiment of the present invention detects the matching state between the antenna unit 10 and the balanced / unbalanced converting unit 35. Specifically, by detecting the open / closed state of the movable unit 70 and adjusting the matching state between the antenna unit 10 and the balanced / unbalanced converting unit 35, communication is possible regardless of the movable unit 70. The impedance of the antenna unit 10 is maintained so as to be possible.

  That is, the wireless communication terminal device 1 further includes a matching state detection unit 90 that detects a matching state between the antenna unit 10 and the balanced / unbalanced converting unit 35.

  In this embodiment, the alignment state detection unit 90 is an open / close state detection unit 90 that detects the open / close state of the movable unit 70. Here, the open / close state detection means 90 is an open / close switch that detects the open / close of the movable portion 70. The open / closed state detection means 90 is connected to the input system of the control unit 40 so that a detection signal is transmitted to the control unit 40 (see FIG. 2A).

  The matching means 36 includes a variable capacitance diode 361 that adjusts the impedance of the antenna unit 10.

  Specifically, as shown in FIGS. 4, 6, and 7, either one of the two feeding points 10 a and 10 b of the antenna unit 10 (here, one feeding point 10 a) has a cathode of a variable capacitance diode 361. The side is connected via the inductor L6 and is also connected to the matching adjustment unit 362. The anode side of the variable capacitance diode 361 is grounded via the inductor L7. The matching adjustment unit 362 is connected to the output side of the control unit 40 so that a voltage is applied to the variable capacitance diode 361.

  The control unit 40 corrects the impedance of the antenna unit 10 by changing the voltage applied to the variable capacitance diode 361 according to the open / closed state of the movable unit based on the detection result of the open / closed state detecting means 90. . Here, the control unit 40 shifts the power supply of the control unit 40 to a standby state and changes the matching state between the antenna unit 10 and the balanced / unbalanced converting unit 35 as the movable unit 70 is opened and closed. It is like that.

  FIG. 9 is a diagram illustrating the state of the capacitance of the variable capacitance diode 361, the capacitance of the antenna unit 10, and the total (matching) capacitance according to the application state of the matching adjustment voltage with respect to the detection state of the open / close state detection means 90.

  As shown in FIG. 9, in the matching unit 36, the capacitance of the variable capacitance diode 361 changes according to the voltage applied from the control unit 40 to the matching adjustment unit 362 based on the open / close state of the movable unit 70 by the open / close state detection unit 90. To do. When the voltage applied to the matching adjustment unit 362 is turned on (see α2 in FIG. 9) when the movable unit 70 is closed (see α1 in FIG. 9), the electric capacity of the variable capacitance diode 361 decreases (α3 in FIG. 9). When the movable part 70 is open (see β1 in FIG. 9) and the voltage applied to the matching adjustment unit 362 is turned off (see β2 in FIG. 9), the electric capacity of the variable capacitance diode 361 increases (see FIG. 9). (See β3 in 9). On the other hand, the electric capacity of the antenna unit 10 increases as it approaches the main body 80 (for example, the main board 81). For this reason, the electric capacity of the variable capacitance diode 361 is large when the movable portion 70 is closed (see α4 in FIG. 9) and is small when the movable portion 70 is open (see β4 in FIG. 9). That is, since the increase and decrease of the capacitance of the variable capacitance diode 361 and the capacitance of the antenna unit 10 operate in the opposite direction by opening and closing the movable unit 70, the total capacitance can be made constant.

  That is, when the movable portion 70 is open, the variable capacitance diode 361 has a large capacitance, and thus acts to couple the antenna element 11 and the antenna element 12. In this state, the matching unit 36 and the balanced / unbalanced converting unit 35 match the capacitance of the capacitor and the coil of the matching unit 36. When the open / close state detection means 90 detects the closed state of the movable unit 70, a voltage is applied to the matching adjustment unit 362. As a result, by reducing the capacitance of the variable capacitance diode 361, the inductors L6 and L7 connected in series are strengthened, and the impedance tends to be inductive. However, when the antenna unit 10 approaches the main body unit 80 (for example, the main board 81), the inductivity is brought back to capacitive by the capacitance generated between the antenna elements 11 and 12.

  By these actions, the diode capacity + antenna capacity becomes constant, and the antenna unit 10 can keep the impedance constant regardless of whether the movable unit 70 is opened or closed, and wireless LAN communication (or mobile phone wireless communication) or RFID Wireless communication can be performed.

  Here, the open / closed state detection means 90 is a switch that detects whether the movable unit 70 is opened or closed, but may detect a relative position between the main body 80 (for example, the main board 81) and the antenna unit 10. Good. In this case, the control unit 40 varies the voltage applied to the variable capacitance diode 361 according to the relative position between the main body unit 80 and the antenna unit 10 based on the detection result of the open / close state detection unit 90, thereby changing the impedance of the antenna unit 10. You may come to correct | amend.

  The directional coupler 33, the first to third phase shifters 34a to 34c, the balanced / unbalanced converter 35, the inductor L, and the capacitor C are configured in a multilayer substrate such as LTCC as described above. However, the present invention is not limited to this, and it may be mounted as a component on an actual module substrate.

  The communication range of the wireless communication terminal device 1 according to the embodiment of the present invention may be narrower than that of a general RFID product. In this way, by narrowing the communication range, saving power by low transmission output, and mounting an ultra-small antenna, it is possible to deliberately limit the range to a narrow range and use it almost at a contact distance.

  By doing so, only the target RFID tag can be read accurately. In addition, the user can intentionally read the RFID tag close to it. Furthermore, since there is little possibility of reading a plurality of RFID tags, a protocol for preventing mutual interference can be omitted.

  Further, in a normal stationary RFID reader / writer that performs RFID wireless communication, a communication range is expanded by using a high transmission output and a large high gain antenna. For this reason, a new application can be developed by a synergistic effect with such a normal RFID reader / writer.

  For example, as shown in FIG. 10, in a public area, an RFID tag is read / written from a distant place by a stationary RFID reader / writer 300, and the same RFID tag 2 is read by the wireless communication terminal device 1 according to the embodiment of the present invention. Is also possible. That is, it is possible to take the RFID tag 2 to a specific public area, write information in the RFID tag 2, and use the information in the wireless communication terminal device 1 according to the embodiment of the present invention.

  The wireless communication terminal device according to the present invention can be used as a game machine, for example. That is, the RFID tag is used as a game-specific recording medium (for example, a card), and the user writes / reads information by intentionally bringing the recording medium close to the wireless communication terminal device according to the present invention as a game machine. On the other hand, it can be used for writing / reading information to / from the recording medium only when the user who possesses the recording medium approaches the stationary RFID reader / writer.

  Specifically, game information such as score information written on a recording medium (for example, a card) of an RFID tag is updated at a game department, and the information is intended for the wireless communication terminal device according to the present invention as a game machine. It is possible to update the game information (for example, score) in the game machine.

  The game machine has an effect on the game (for example, a character is displayed), and a plurality of numerical data is recorded on the recording medium as additional information for representing a difference in other effects (for example, individuality with the character). ing. Part of the numerical data is automatically updated by a stationary RFID reader / writer placed at the game department, so that specific game information (for example, character personality information) can be enhanced. Advantage will be gained.

  This information can be read not only by one game machine but also by another RFID game reader / writer built in another game machine of the same type or a game machine at a game center.

  By doing so, game information (for example, a character) on the recording medium has individuality that only the recording medium has. As a result, mutual cooperation among game machine makers, software makers, card makers, and game machine dealers, and improvement in added value of game characteristics can be realized.

  In the present embodiment, a wireless communication terminal device capable of performing wireless LAN communication (or mobile phone wireless communication) and RFID wireless communication has been described. However, the present invention is not limited to this, and the present invention is not limited thereto. The wireless communication terminal apparatus may be configured to perform predetermined first wireless communication and predetermined second wireless communication different from the first wireless communication.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic perspective view showing a wireless communication terminal device and an RFID tag according to an embodiment of the present invention, and FIG. 1 (a) shows an RFID tag by a wireless communication terminal device capable of performing wireless LAN communication and RFID wireless communication. FIG. 2B is a diagram illustrating a state in which RFID wireless communication is performed. FIG. 2B is a diagram illustrating a state in which RFID wireless communication is performed with respect to an RFID tag by a wireless communication terminal device capable of performing mobile phone wireless communication and RFID wireless communication. FIG. It is a schematic block diagram of the radio | wireless communication terminal apparatus shown in FIG. 1, Comprising: It is a block diagram which shows the radio | wireless communication terminal apparatus shown to Fig.1 (a). It is a schematic block diagram of the radio | wireless communication terminal apparatus shown in FIG. 1, Comprising: It is a block diagram which shows the radio | wireless communication terminal apparatus shown in FIG.1 (b). FIG. 3 is a block diagram schematically showing a wireless LAN communication unit (or a mobile phone wireless communication unit) and an RFID wireless communication unit in the wireless communication terminal device shown in FIGS. 1 and 2. It is a block diagram which shows schematic structure of the RFID radio | wireless communication part shown in FIG. It is the schematic which shows the example of arrangement | positioning of the antenna part mounted in the radio | wireless communication terminal apparatus, the wireless LAN communication part (or mobile telephone radio | wireless communication part), the RFID radio | wireless communication part, the tag antenna mounted in the RFID tag, and tag IC. It is a figure which shows an example of the electric circuit of the RFID radio | wireless communication part shown in FIG. FIG. 7 is another example of the electric circuit of the RFID wireless communication unit shown in FIG. 6, and is an electric circuit diagram when the RFID demodulator is an orthogonal demodulator. FIG. 6A is a diagram for explaining the adjustment of high-frequency matching of the balanced / unbalanced conversion unit, and FIG. 5A is a schematic side view of a wireless communication terminal device that performs wireless LAN communication and RFID wireless communication, and FIG. ) Is a schematic plan view of the wireless communication terminal device. It is a figure which shows the state of the capacity | capacitance of the variable capacity diode by the application state of the matching adjustment voltage with respect to the detection state of an open / close state detection means, the capacity | capacitance of an antenna part, and a total (matching) capacity | capacitance. It is the schematic which shows the other usage example of the radio | wireless communication terminal device which concerns on this invention. It is a figure which shows roughly the state by which information transmission / reception is made | formed by wireless LAN communication and RFID wireless communication using two systems, an RFID system and a wireless LAN system. In the case of performing two wireless communications of wireless LAN communication (or mobile phone wireless communication) and RFID wireless communication, a configuration example and a configuration example of an RFID tag when an antenna is shared by one using an antenna switcher are shown. It is a block diagram. FIG. 4A is a diagram for explaining writing / reading of information in an RFID wireless communication system, and FIG. 1A is a diagram illustrating a state in which information is modulated when information is written to an RFID tag, and FIG. These are figures which show the state where information is demodulated when writing information to an RFID tag, and figure (c) is a figure which shows the state where information is modulated when reading information from an RFID tag. FIG. 2 is a block diagram equivalently representing the block diagram shown in FIG. 1 of Patent Document 1 for facilitating the description of the wireless communication device described in Patent Document 1;

Explanation of symbols

1 wireless communication terminal device 10 antenna unit 20 wireless LAN communication unit (or mobile phone wireless communication unit)
30 RFID wireless communication unit 21 oscillator 22 modulator 23 transmission amplifier 31 RFID modulator 32 RFID demodulator 33 directional coupler 34a first phase shifter 34b second phase shifter 34c third phase shifter 35 balanced / unbalanced conversion unit (balanced) / Unbalanced converter)
36 Matching means (matching circuit)
70 Movable unit 80 Main unit 90 Alignment state detection means (open / close switch)
330 Directional Coupler Main Line 333 Directional Coupler Subline 351, 352 Balanced Line 353 Unbalanced Line 361 Variable Capacitance Diode

Claims (12)

A wireless communication terminal device capable of executing at least two types of wireless communication: mobile phone wireless communication using a mobile phone wireless communication method and RFID wireless communication using an RFID wireless communication method,
An antenna section;
A mobile phone wireless communication unit for transmitting and receiving the mobile phone wireless communication;
An RFID wireless communication unit for transmitting and receiving the RFID wireless communication,
The mobile phone wireless communication unit includes an oscillator, a modulator, and a transmission amplifier,
The RFID wireless communication unit includes an RFID demodulator,
The RFID wireless communication unit is provided between the antenna unit and the mobile phone wireless communication unit,
A radio communication terminal device, wherein the RFID radio communication unit transmits and receives the RFID radio communication via the antenna unit using the oscillator of the mobile phone radio communication unit. A wireless communication terminal device capable of executing at least two types of wireless communication: wireless LAN communication using a wireless LAN wireless communication method and RFID wireless communication using an RFID wireless communication method,
An antenna section;
A wireless LAN communication unit for transmitting and receiving the wireless LAN communication;
An RFID wireless communication unit for transmitting and receiving the RFID wireless communication,
The wireless LAN communication unit includes an oscillator, a modulator, and a transmission amplifier,
The RFID wireless communication unit includes an RFID demodulator,
The RFID wireless communication unit is provided between the antenna unit and the wireless LAN communication unit,
A radio communication terminal apparatus, wherein the RFID radio communication unit transmits and receives the RFID radio communication via the antenna unit using the oscillator of the wireless LAN communication unit.   The RFID wireless communication unit transmits and receives the RFID wireless communication through the antenna unit by the RFID wireless communication unit using the oscillator and the transmission amplifier of the mobile phone wireless communication unit or the wireless LAN communication unit. The wireless communication terminal device according to 1 or 2.   The antenna unit shares an antenna that transmits and receives radio waves of the mobile phone wireless communication or the wireless LAN communication and an antenna that transmits and receives radio waves of the RFID wireless communication. The wireless communication terminal device according to any one of the above. The RFID wireless communication unit further includes an RFID modulator and a directional coupler,
Of the main lines in the directional coupler, one side is connected to the mobile phone wireless communication unit or the wireless LAN communication unit via the RFID modulator, and the other side is connected to the antenna unit,
The radio communication terminal apparatus according to claim 4, wherein two high-frequency lines of sub-lines in the directional coupler are mixed in the RFID demodulator.   The RFID wireless communication unit is between the RFID modulator and the mobile phone wireless communication unit or the wireless LAN communication unit on the one-side main line of the directional coupler, and the directional coupler 6. The radio communication terminal apparatus according to claim 5, further comprising a phase shifter inserted into at least one of the directional coupler and the antenna unit in the other main line.   The RFID wireless communication unit further includes a phase shifter in which the two sub-lines in the directional coupler are connected to the RFID demodulator and inserted between the directional coupler and the RFID demodulator. The wireless communication terminal device according to any one of claims 4 to 6. The RFID wireless communication unit further includes a balanced / unbalanced converting unit that converts a balanced line from the antenna unit into an unbalanced line, and a matching unit that performs high-frequency matching,
The matching means is connected between both paths of the balanced / unbalanced converter, and the high-frequency line converted into the unbalanced line by the balanced / unbalanced converter is a main line on the other side of the directional coupler. The wireless communication terminal device according to claim 4, wherein the wireless communication terminal device is connected to a line. A matching state detecting means for detecting a matching state between the antenna unit and the balanced / unbalanced converting unit;
The matching means includes a variable capacitance diode that adjusts the impedance of the antenna unit,
9. The radio communication terminal apparatus according to claim 8, wherein the impedance of the antenna unit is corrected by varying a voltage applied to the variable capacitance diode based on a detection result of the matching state detection unit.   The wireless communication terminal apparatus according to claim 1, wherein the RFID wireless communication unit is configured as a single component.   An RFID module applied as the RFID wireless communication unit in the wireless communication terminal device according to claim 10. A wireless communication terminal device capable of executing at least two wireless communications of a first wireless communication using a first wireless communication method and a second wireless communication using a second wireless communication method different from the first wireless communication method. And
An antenna section;
A first wireless communication unit for transmitting and receiving the first wireless communication;
A second wireless communication unit for transmitting and receiving the second wireless communication,
The first wireless communication unit includes an oscillator, a modulator, and a transmission amplifier,
The second wireless communication unit includes a demodulator,
The second wireless communication unit is provided between the antenna unit and the first wireless communication unit,
A radio communication terminal apparatus, wherein the second radio communication unit transmits and receives the second radio communication via the antenna unit using the oscillator of the first radio communication unit.

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