CN113810077B - Radio frequency circuit and mobile terminal - Google Patents
Radio frequency circuit and mobile terminal Download PDFInfo
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- CN113810077B CN113810077B CN202110951665.0A CN202110951665A CN113810077B CN 113810077 B CN113810077 B CN 113810077B CN 202110951665 A CN202110951665 A CN 202110951665A CN 113810077 B CN113810077 B CN 113810077B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a radio frequency circuit and a mobile terminal, wherein the radio frequency circuit comprises: a transmitter, a receiver, and a first antenna; the radio frequency circuit further comprises: a first integrated switch, and a first diplexer; the first antenna is connected with a first integrated switch, and the output end of the first integrated switch is connected with the high-frequency diversity receiving end of the receiver; the first diplexer is respectively connected to the first integrated switch, the low-frequency transmitting end of the transmitter and the low-frequency main set receiving end of the receiver are arranged in a plurality of groups, so that the problems that in the prior art, when the combination of medium and high CA is required to be supported, the cost of the device is high, the loss is high and the performance of the antenna is unfavorable are solved.
Description
Technical Field
The present invention relates to the field of radio frequency technologies, and in particular, to a radio frequency circuit and a mobile terminal.
Background
Today, the mobile internet is developed at a high speed, the holding capacity of the intelligent mobile terminal is rapidly increased, and the global data traffic is driven to be greatly improved. There is an increasing desire to transmit more data content, such as more frequency bands, wirelessly.
In order to realize the function of supporting Carrier Aggregation (CA), the antennas in the prior art need to use expensive radio frequency devices to combine each frequency band into one antenna, especially when the combination of medium+high CA needs to be supported, the cost of the devices is high, the loss of the devices is high, the performance of the antennas is unfavorable, and how to support all the frequency bands for each antenna is a problem to be solved at present.
Accordingly, the prior art is still in need of improvement and development.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention aims to provide a radio frequency circuit and a mobile terminal, which aims to solve the problems of high device cost, high loss and adverse antenna performance when the combination of medium and high CA needs to be supported in the prior art.
The technical scheme of the invention is as follows:
a radio frequency circuit comprising: a transmitter, a receiver, and a first antenna; the radio frequency circuit further comprises: a first integrated switch, and a first diplexer;
the first antenna is connected with the first integrated switch, the output end of the first integrated switch is connected with the high-frequency diversity receiving end of the receiver, and the receiver receives the high-frequency signals which are transmitted to the first integrated switch by the first antenna and distributed by the first integrated switch through the high-frequency diversity receiving end;
the first duplexer is respectively connected with the first integrated switch, a low-frequency transmitting end of the transmitter and a low-frequency main set receiving end of the receiver;
the first duplexer is used for receiving signals sent by the low-frequency transmitting end of the transmitter, sending the signals to the first integrated switch and sending the signals to the first antenna through the first integrated switch;
or the first duplexer is used for receiving the low-frequency signal which is transmitted to the first integrated switch by the first antenna and distributed by the first integrated switch, and transmitting the low-frequency signal to a low-frequency main set receiving end of the receiver.
Further, the radio frequency circuit further includes: a second antenna, a second integrated switch, and a second diplexer;
the second antenna is connected with the second integrated switch, the output end of the second integrated switch is connected with the intermediate frequency diversity receiving end of the receiver, and the receiver receives intermediate frequency signals which are transmitted to the second integrated switch by the second antenna and distributed by the second integrated switch through the intermediate frequency diversity receiving end;
the second diplexer is respectively connected with the second integrated switch, a high-frequency transmitting end of the transmitter and a high-frequency main set receiving end of the receiver;
the second duplexer is used for receiving the signal sent by the high-frequency transmitting end of the transmitter, sending the signal to the second integrated switch and sending the signal to the second antenna through the second integrated switch;
or the second diplexer is used for receiving the high-frequency signals transmitted to the second integrated switch by the second antenna and distributed by the second integrated switch and transmitting the high-frequency signals to a high-frequency main set receiving end of the receiver.
Further, the radio frequency circuit further includes: a third antenna, a third integrated switch, and a third duplexer;
the third antenna is connected with a third integrated switch, the output end of the third integrated switch is connected with a low-frequency diversity receiving end of the receiver, and the receiver receives a low-frequency signal which is transmitted to the third integrated switch by the third antenna and distributed by the third integrated switch through the low-frequency diversity receiving end;
the third duplexer is respectively connected with the third integrated switch, an intermediate frequency transmitting end of the transmitter and an intermediate frequency main set receiving end of the receiver;
the third duplexer is used for receiving the signal sent by the intermediate frequency transmitting end of the transmitter, sending the signal to the third integrated switch and sending the signal to the third antenna through the third integrated switch;
or the third duplexer is used for receiving the intermediate frequency signals which are transmitted to the third integrated switch by the third antenna and distributed by the third integrated switch, and transmitting the intermediate frequency signals to an intermediate frequency main set receiving end of the receiver.
A mobile terminal comprising a mobile terminal body, the mobile terminal further comprising a radio frequency circuit as described above, the radio frequency circuit being disposed within the mobile terminal body.
A medium + high CA combination is achieved. Among the radio frequency devices in the prior art, the radio frequency devices which can combine the intermediate frequency and the high frequency in the same antenna are very few, and are expensive and high in cost, so that most mobile terminals do not support the combination of medium and high CA. By splitting the high-frequency main set from the intermediate-frequency diversity and using 2 antennas, the radio frequency device can be avoided, the medium+high CA combined function can be realized, and the insertion loss caused by the device is avoided.
Further, the first antenna is disposed on top of the mobile terminal body.
The first antenna is arranged at the top of the mobile terminal, and a certain space is reserved at the top of the inside of the mobile terminal, so that the mobile terminal can adapt to the design requirement of the internal space of the mobile terminal which is more and more stressed at present, and the functions of the first antenna can be guaranteed not to be influenced.
Further, the second antenna is arranged on the side edge of the mobile terminal body facing the top direction.
The antenna can be closer to the first antenna arranged at the top of the mobile terminal, so that the first antenna and the second antenna are ensured to be connected with the radio frequency signal path through the antenna shrapnel arranged on the mobile terminal.
Further, the third antenna is disposed at the bottom of the mobile terminal body.
The third antenna is an intermediate frequency main set antenna and is a communication antenna with main intermediate frequency bands, and the third antenna is provided with low-frequency diversity which plays an auxiliary role in communication and has low performance requirements, so that the third antenna is arranged at the bottom in the moving process, and meanwhile, the problem of influence of low-frequency tuning on the performance of the intermediate frequency main set is avoided.
Further, the mobile terminal includes:
the main board is arranged at the top of the mobile terminal body;
the antenna small plate is arranged at the bottom of the mobile terminal body;
and the RF cable is arranged on the side edge, deviating from the second antenna direction, of the middle part of the mobile terminal body and is connected between the main board and the antenna small board.
Through connect the radio frequency circuit between the antenna shell fragment on the antenna panel, need not use the RF cable to be connected to the antenna panel, only 1 antenna need use the RF cable to be connected to in the mobile terminal the antenna panel, only use 1 RF cable for mobile terminal cost is lower, simultaneously, and the requirement of structure space and design complexity is also lower, has satisfied the demand that mobile terminal inner space is little.
Further, a radio frequency chip is arranged on the main board and used for transmitting radio frequency signals.
The main board is also provided with BB chips, memory chips, power management chips, radio frequency chips and other chips and devices; specifically, the BB chip, the memory chip, the power management chip, the radio frequency chip and other chips and the devices can be connected to the main board in a welding mode, so that the chips and the devices are firmer.
Further, an antenna spring sheet is arranged on the antenna small plate;
the first antenna and the second antenna are connected with the radio frequency signal path through the antenna elastic sheet;
and the third antenna introduces signals into the antenna small plate through the RF cable and is connected with the radio frequency signal path through the antenna shrapnel.
The beneficial effect of this scheme: the invention provides a radio frequency circuit and a mobile terminal, which are provided by arranging the first antenna connected with a first integrated switch, arranging the first integrated switch with an output end connected with a high-frequency diversity receiving end of a receiver, and arranging the first diplexer respectively connected with the first integrated switch, a low-frequency transmitting end of a transmitter and a low-frequency main set receiving end of the receiver, so that the receiver receives a high-frequency signal which is transmitted to the first integrated switch by the first antenna through the high-frequency diversity receiving end and distributed by the first integrated switch, and the first diplexer is used for receiving the signal transmitted by the low-frequency transmitting end of the transmitter and transmitting the signal to the first integrated switch, and transmitting the signal to the first antenna through the first integrated switch, or, the first diplexer is used for receiving the low-frequency signals transmitted to the first integrated switch by the first antenna and distributed by the first integrated switch, and transmitting the low-frequency signals to the low-frequency main set receiving end of the receiver, so that the connected circuit splits each frequency band of the low frequency (700-960 Mhz), the intermediate frequency (1.7G-2.2 Ghz) and the high frequency (2.5G-2.7 Ghz), the low-frequency signals can be transmitted, the low-frequency main set and the high-frequency diversity signals can be received through the first integrated switch, the first diplexer and the first antenna, the transmission requirements of the low-frequency signals and the reception requirements of the low-frequency main set and the high-frequency diversity signals can be met, the CA combination requirements among various frequency bands can be met maximally through the arrangement of a plurality of groups of different frequency bands, the device cost is higher and the loss is higher when the CA combination of medium and high is required to be supported in the prior art, and adversely affects the performance of the antenna.
Drawings
Fig. 1 is a schematic diagram of an antenna layout structure according to an embodiment of a radio frequency circuit and a mobile terminal of the present invention;
FIG. 2 is a schematic diagram of an RF circuit and an RF circuit structure of an embodiment of a mobile terminal according to the present invention;
the reference numerals in the drawings: 10. a transmitter; 20. a receiver; 30. a first integrated switch; 40. a second integrated switch; 50. a third integrated switch; 60. a first diplexer; 70. a second diplexer; 80. a third diplexer; 90. a first antenna; 100. a second antenna; 110. a third antenna; 120. a main board; 130. an antenna panel; 140. an RF cable; 150. a mobile terminal body.
Detailed Description
The invention provides a radio frequency circuit and a mobile terminal, and in order to make the purposes, technical schemes and effects of the invention clearer and more definite, the invention is further described in detail below by referring to the accompanying drawings and the embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It should also be noted that in the drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that, if there is an azimuth or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc., based on the azimuth or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus, terms describing the positional relationship in the drawings are merely for exemplary illustration and are not to be construed as limitations of the present patent, and specific meanings of the terms described above may be understood by those skilled in the art according to specific circumstances.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
Today, the mobile internet is developed at a high speed, the holding capacity of the intelligent mobile terminal is rapidly increased, and the global data traffic is driven to be greatly improved. There is an increasing desire to transmit more data content, such as more frequency bands, wirelessly. In order to realize the function of supporting Carrier Aggregation (CA), the antennas in the prior art need to use expensive radio frequency devices to combine each frequency band into one antenna, especially when the combination of medium+high CA needs to be supported, the cost of the devices is high, the loss of the devices is high, the performance of the antennas is disadvantageous, and how to support all the frequency bands for each antenna is the problem to be solved at present.
Embodiment one:
as shown in fig. 2, the present invention proposes a radio frequency circuit, comprising: a transmitter 10, a receiver 20 and a first antenna 90. The radio frequency circuit further comprises: a first integrated switch 30, and a first diplexer 60. The first antenna 90 is connected to the first integrated switch 30, an output end of the first integrated switch 30 is connected to a high-frequency diversity receiving end of the receiver 20, and the receiver 20 receives the high-frequency signal, which is transmitted to the first integrated switch 30 by the first antenna 90 and distributed by the first integrated switch 30, through the high-frequency diversity receiving end. The first diplexer 60 is connected to the first integrated switch 30, the low frequency transmitting end of the transmitter 10 and the low frequency main set receiving end of the receiver 20, respectively. The first duplexer 60 is configured to receive a signal sent by the low frequency transmitting end of the transmitter 10, and send the signal to the first integrated switch 30, and send the signal to the first antenna 90 through the first integrated switch 30. Alternatively, the first duplexer 60 is configured to receive the low frequency signal sent from the first antenna 90 to the first integrated switch 30 and distributed by the first integrated switch 30, and send the low frequency signal to the low frequency main set receiving end of the receiver 20. Through the above arrangement, it is ensured that the first integrated switch 30, the first duplexer 60, the first antenna 90, the low-frequency transmitting end of the transmitter 10, the low-frequency main set receiving end of the receiver 20, and the high-frequency diversity receiving end of the receiver 20 are separately connected to form a transmitting and receiving path, and the connected circuit splits each frequency band of the low frequency (700-960 Mhz), the intermediate frequency (1.7G-2.2 Ghz) and the high frequency (2.5G-2.7 Ghz), so that the low-frequency signal can be transmitted, the low-frequency main set and the high-frequency diversity signal can be received through the first integrated switch 30, the first duplexer 60 and the first antenna 90, and the receiving requirements of the low-frequency signal and the low-frequency main set and the high-frequency diversity signal can be met.
In the above-mentioned scheme, by providing the first antenna 90 connected to the first integrated switch 30, providing the first integrated switch 30 with an output terminal connected to the high-frequency diversity receiving terminal of the receiver 20, and providing the first diplexer 60 respectively connected to the first integrated switch 30, the low-frequency transmitting terminal of the transmitter 10 and the low-frequency main set receiving terminal of the receiver 20, such that the receiver 20 receives the high-frequency signal transmitted to the first integrated switch 30 through the high-frequency diversity receiving terminal and distributed by the first integrated switch 30, the first diplexer 60 is used to receive the signal transmitted from the low-frequency transmitting terminal of the transmitter 10 and transmit the signal to the first integrated switch 30, transmit the signal to the first antenna 90 through the first integrated switch 30, or, the first duplexer 60 is configured to receive the low-frequency signal that is transmitted to the first integrated switch 30 by the first antenna 90 and is distributed by the first integrated switch 30, and send the low-frequency signal to the low-frequency main set receiving end of the receiver 20, so that the connected circuit splits each frequency band of the low frequency (700-960 Mhz), the intermediate frequency (1.7G-2.2 Ghz) and the high frequency (2.5G-2.7 Ghz), and is capable of transmitting the low-frequency signal, receiving the low-frequency main set and the high-frequency diversity signal by the first integrated switch 30, the first duplexer 60 and the first antenna 90, meeting the requirements of transmitting the low-frequency signal, receiving the low-frequency main set and the high-frequency diversity signal, and maximizing the requirements of CA combination between various frequency bands by the above-mentioned settings of multiple groups of different frequency bands, solving the problem that the device cost is higher when the CA combination of medium + high frequency needs to be supported in the prior art, the loss is larger, and the antenna performance is not good.
Embodiment two:
on the basis of the first embodiment, as shown in fig. 2, the radio frequency circuit further includes: a second antenna 100, a second integrated switch 40, and a second diplexer 70. The second antenna 100 is connected to the second integrated switch 40, an output end of the second integrated switch 40 is connected to an intermediate frequency diversity receiving end of the receiver 20, and the receiver 20 receives the intermediate frequency signal, which is transmitted to the second integrated switch 40 by the second antenna 100 and distributed by the second integrated switch 40, through the intermediate frequency diversity receiving end. The second diplexer 70 is connected to the second integrated switch 40, the high frequency transmitting end of the transmitter 10 and the high frequency main set receiving end of the receiver 20, respectively. The second duplexer 70 is configured to receive a signal sent from the high frequency transmitting end of the transmitter 10 and send the signal to the second integrated switch 40, and send the signal to the second antenna 100 through the second integrated switch 40, or the second duplexer 70 is configured to receive a high frequency signal sent from the second antenna 100 to the second integrated switch 40 and distributed by the second integrated switch 40 and send the high frequency signal to the high frequency main set receiving end of the receiver 20. Through the above arrangement, it is ensured that the second integrated switch 40, the second duplexer 70, the second antenna 100, the high-frequency transmitting end of the transmitter 10, the high-frequency main set receiving end of the receiver 20, and the intermediate-frequency diversity receiving end of the receiver 20 are separately connected to form a transmitting and receiving path, and the connected circuit splits each frequency band of the low frequency (700-960 Mhz), the intermediate frequency (1.7G-2.2 Ghz) and the high frequency (2.5G-2.7 Ghz), so that the transmission of the high-frequency signal, the reception of the high-frequency main set and the intermediate-frequency diversity signal can be realized through the second integrated switch 40, the second duplexer 70 and the second antenna 100, and the requirements of the transmission of the high-frequency signal, the high-frequency main set and the reception of the intermediate-frequency diversity signal can be satisfied.
As shown in fig. 2, in a specific embodiment of the present invention, the radio frequency circuit further includes: a third antenna 110, a third integrated switch 50, and a third duplexer 80. The third antenna 110 is connected to the third integrated switch 50, an output end of the third integrated switch 50 is connected to a low-frequency diversity receiving end of the receiver 20, and the receiver 20 receives the low-frequency signal that is transmitted to the third integrated switch 50 by the third antenna 110 and distributed by the third integrated switch 50 through the low-frequency diversity receiving end. The third diplexer 80 is connected to the third integrated switch 50, the intermediate frequency transmitting end of the transmitter 10 and the intermediate frequency main set receiving end of the receiver 20, respectively. The third duplexer 80 is configured to receive a signal sent by the intermediate frequency transmitting end of the transmitter 10, and send the signal to the third integrated switch 50, and send the signal to the third antenna 110 through the third integrated switch 50. Alternatively, the third duplexer 80 is configured to receive the intermediate frequency signal that is sent to the third integrated switch 50 by the third antenna 110 and distributed by the third integrated switch 50, and send the intermediate frequency signal to the intermediate frequency main set receiving end of the receiver 20. Through the above arrangement, it is ensured that the third integrated switch 50, the third duplexer 80, the third antenna 110, the intermediate frequency transmitting end of the transmitter 10, the intermediate frequency main set receiving end of the receiver 20, and the low frequency diversity receiving end of the receiver 20 are separately connected to form a transmitting and receiving path, the connected circuit splits each frequency band of the low frequency (700-960 Mhz), the intermediate frequency (1.7G-2.2 Ghz) and the high frequency (2.5G-2.7 Ghz), so that the transmission of the intermediate frequency signal, the reception of the intermediate frequency main set and the low frequency diversity signal can be realized through the third integrated switch 50, the third duplexer 80 and the third antenna 110, and the transmission requirements of the intermediate frequency signal, the intermediate frequency main set and the low frequency diversity signal can be satisfied.
Specifically, the first antenna 90 uses an antenna tuning device to extend and optimize the performance and bandwidth of the low-frequency antenna, the antenna tuning device may be a tuning switch or a device such as an adjustable capacitor, and the second antenna 100 and the third antenna 110 do not use antenna tuning devices. The frequency band and functions implemented by the first antenna 90 include main set transmission and reception at low frequencies, diversity reception at high frequencies. That is, the diversity reception of the high frequency is combined with the main set of the low frequency (including transmission and reception) to form one path, and the transmitting and receiving functions are realized through the first antenna 90. The frequency band and functions implemented by the second antenna 100 include high-frequency main set transmission and reception, intermediate-frequency diversity reception, that is, intermediate-frequency diversity reception, and high-frequency main set (including transmission and reception) are combined into one path, and the transceiving function is implemented by the second antenna 100. The frequency band and functions implemented by the third antenna 110 include main set transmission and reception of intermediate frequency, diversity reception of low frequency, that is, diversity reception of low frequency, and main set of intermediate frequency (including transmission and reception) are combined into one path, and the transceiving function is implemented by the third antenna 110.
Through the arrangement of the first embodiment and the second embodiment, the first integrated switch 30 may be turned on or off individually for the first antenna 90, the second integrated switch 40 may be turned on or off individually for the second antenna 100, and the third integrated switch 50 may be turned on or off individually for the third antenna 110, so as to ensure that the corresponding integrated switch is turned on in time when a certain antenna needs to be used. The specific working principle is as follows: the transmitting end transmits a low-frequency signal, and the low-frequency signal is transmitted through the first duplexer 60 and the first integrated switch 30 and finally transmitted through the first antenna 90, so that the low-frequency signal transmission is completed, the first antenna 90 receives the signal, and the signal reaches a high-frequency diversity receiving interface of the receiving end through the first integrated switch 30, or reaches a low-frequency main set receiving interface of the receiving end through the first integrated switch 30 and the first duplexer 60, so that the high-frequency diversity and the low-frequency main set reception are completed; the transmitting end transmits an intermediate frequency signal, and the intermediate frequency signal is transmitted through the third duplexer 80 and the third integrated switch 50 and finally transmitted through the third antenna 110, so that the intermediate frequency signal transmission is completed, the third antenna 110 receives the signal, and the signal reaches a low-frequency diversity receiving interface of the receiving end through the third integrated switch 50, or reaches an intermediate frequency main set receiving interface of the receiving end through the third integrated switch 50 and the third duplexer 80, so that the low-frequency diversity and the intermediate frequency main set reception are completed; the transmitting end transmits the high-frequency signal, and finally transmits the high-frequency signal through the second duplexer 70 and the second integrated switch 40 and finally through the second antenna 100, so that the second antenna 100 receives the signal, and the signal reaches an intermediate frequency diversity receiving interface of the receiving end through the second integrated switch 40, or reaches a high frequency main set receiving interface of the receiving end through the second integrated switch 40 and the second duplexer 70, so that the intermediate frequency diversity and the high frequency main set receiving are completed.
Through the above arrangement, each of the first antenna 90, the second antenna 100 and the third antenna 110 is provided with the first integrated switch 30, the second integrated switch 40 and the third integrated switch 50 separately, so that the first antenna 90, the second antenna 100 and the third antenna 110 can be opened or closed separately, and the independence of the respective operations is ensured; the first duplexer 60, the second duplexer 70 and the third duplexer 80 isolate signals of a transmitting end and a receiving end, so that the receiver 20 and the transmitter 10 can work normally at the same time. The invention maximally splits each frequency band in low frequency (700-960 Mhz), medium frequency (1.7G-2.2 Ghz) and high frequency (2.5G-2.7 Ghz), combines each antenna diversity, does not need additional antenna realization, and is combined with a main set antenna, thereby maximally reducing the number of the antennas of the whole machine, enabling the whole machine to only need 3 antennas, reducing cost and design complexity and requiring the space of the antenna in the mobile terminal. In general, in the prior art, the antenna circuit structure is designed, the low-medium-high frequency main sets are all on one antenna, and the technical scheme of the invention can realize the low-medium-high frequency main sets through separate antennas respectively, can maximally meet CA combination requirements among various frequency bands, and is an antenna framework compatible to Non CA version.
Specifically, the first duplexer 60, the second duplexer 70, and the third duplexer 80 are all different frequency duplex radio stations, and are composed of six band-stop filters (notch filters), each resonating at a transmitting frequency and a receiving frequency, a receiving-end filter resonating at the transmitting frequency and preventing the transmitting power from being connected in series to the receiver, and the transmitting-end filter resonating at the receiving frequency. The first duplexer 60, the second duplexer 70 and the third duplexer 80 are both relatively special bi-directional tri-terminal filters, and the diplexer must not only couple in weak receive signals, but also feed large transmit power to the antenna, and require that both perform their functions independently without affecting each other. The first duplexer 60, the second duplexer 70 and the third duplexer 80 are used for isolating the transmitting and receiving signals, ensuring that the receiving and transmitting can work normally at the same time, and are composed of two groups of band-stop filters with different frequencies, so that the transmitting signals of the local machine are prevented from being transmitted to the receiver.
Embodiment III:
on the basis of the first embodiment and the second embodiment, as shown in fig. 1, the present invention further provides a mobile terminal, including a mobile terminal body 150, and the mobile terminal further includes a radio frequency circuit as described in the first embodiment and the second embodiment, where the radio frequency circuit is disposed in the mobile terminal body 150. The mobile terminal can realize the low-medium-high frequency main set through the independent antennas in the radio frequency circuit respectively, and can maximally meet CA combination requirements among various frequency bands.
Embodiment four:
on the basis of the first embodiment, the second embodiment and the third embodiment, as shown in fig. 1, taking an example that the mobile terminal body 150 is horizontally placed on a horizontal plane, one end facing the earphone of the mobile terminal is the top of the mobile terminal, one end facing the speaker of the mobile terminal is the bottom of the mobile terminal body 150, and the left and right sides of the mobile terminal when the mobile terminal is horizontally placed are sides of the mobile terminal. In a specific embodiment of the present invention, the first antenna 90 is disposed at the top of the mobile terminal body 150, and a certain space is provided at the top of the mobile terminal body 150, so as to adapt to the design requirement of the internal space of the mobile terminal that is currently becoming more and more stressed, so as to ensure that the function of the first antenna 90 is not affected.
As shown in fig. 1, in the embodiment of the present invention, the second antenna 100 is disposed at a side of the mobile terminal body 150 facing the top direction, and the second antenna 100 is disposed at a side near the top of the mobile terminal body 150, which may have a relatively close distance from the first antenna 90 disposed at the top of the mobile terminal body 150, so as to ensure that the first antenna 90 and the second antenna 100 are connected to the radio frequency signal path through the antenna dome disposed on the mobile terminal. Alternatively, the second antenna 100 may be disposed on the left side of the mobile terminal, or may be disposed on the right side of the mobile terminal, and may be completely selected according to design requirements.
As shown in fig. 1, in a specific embodiment of the present invention, the third antenna 110 is disposed at the bottom of the mobile terminal body 150. Because the third antenna 110 is an intermediate frequency main set antenna, and is a communication antenna with a main intermediate frequency band, the third antenna 110 is provided with low-frequency diversity, which plays an auxiliary role in communication and has low performance requirements, so that the third antenna 110 is arranged at the bottom of the mobile terminal and is close to the antenna small plate 130, and meanwhile, the third antenna 110 introduces signals into the antenna small plate 130 through a radio frequency cable and is connected with the radio frequency signal path through the antenna elastic sheet, and in addition, the low-frequency diversity of the third antenna 110 can avoid the problem that the low-frequency tuning affects the performance of the main intermediate frequency band.
As shown in fig. 1, in a specific embodiment of the present invention, the mobile terminal includes: motherboard 120, antenna platelet 130, and RF cable140. The main board 120 is disposed at the top of the mobile terminal body 150, the antenna small board 130 is disposed at the bottom of the mobile terminal body 150, and the RFcable140 is disposed at a side of the middle of the mobile terminal body 150 away from the direction of the second antenna 100 and is connected between the main board 120 and the antenna small board 130. Through the above arrangement, the first antenna 90 and the second antenna 100 of the three antennas are all disposed on one side of the motherboard 120, and a radio frequency circuit is connected between the antenna elastic sheets on the antenna small plate 130, so that the antenna small plate 130 does not need to be connected with the antenna small plate 140 by using the RFcable140, and only 1 antenna of the mobile terminal needs to be connected with the antenna small plate 130 by using the RFcable140 and only 1 RF cable140, so that the cost of the mobile terminal is lower, and meanwhile, the requirements on structural space and design complexity are lower, and the requirement on small internal space of the mobile terminal is met. That is, each antenna supports a part of the frequency band, not all the frequency bands of low, medium and high frequencies, which reduces the space requirement of each antenna for the mobile terminal, and is more suitable for the current increasingly stressed internal space design of the mobile terminal. Specifically, the RF cable140 is a radio frequency cable, and is a cable for transmitting electromagnetic energy within a radio frequency range, and the RF cable140 can transmit a wider frequency band, has high protection against external interference, small antenna effect, small radiation loss, simple structure, convenient installation and economy.
As shown in fig. 1, in a specific embodiment of the present invention, a radio frequency chip is disposed on the motherboard 120, and the radio frequency chip is used for transmitting radio frequency signals. Because the rf chip is soldered on the motherboard 120, that is, the rf signal is emitted from the motherboard 120. In a specific embodiment of the present invention, the motherboard 120 is further provided with a BB chip, a memory chip, a power management chip, a radio frequency chip, and the like; specifically, the BB chip, the memory chip, the power management chip, the radio frequency chip, and the device may be connected to the motherboard 120 by way of soldering, so that the chips and the device may be more secure.
In the embodiment of the present invention, as shown in fig. 1, an antenna spring is disposed on the antenna small board 130. The first antenna 90 and the second antenna 100 are connected with the radio frequency signal path through the antenna elastic sheet; the third antenna 110 introduces signals into the antenna panel 130 through the RF cable140 and is interconnected with the RF signal path through the antenna dome.
Through the arrangement, the low frequency, the intermediate frequency and the high frequency of the mobile terminal support receiving diversity, namely each frequency band supports 2 paths of receiving paths to work simultaneously. In the CA dual carrier communication state, each carrier also has 2 paths of reception to operate simultaneously, i.e. 4 paths of reception are simultaneously operated at this time. The mobile terminal supports CA carrier aggregation, comprising various combination modes of low +middle (such as CA B8+B1), medium +middle (such as CA B1+B3), medium +high (such as CA B1+B7), low +high (such as CA B8+B7) and the like, and avoids the influence of low-frequency tuning on the middle-frequency receiving performance during CA carrier aggregation. The first antenna 9090 is a low-frequency main set antenna, and a tuning device is needed, but the first antenna 9090 is provided with intermediate frequency diversity, and the diversity performance requirement is not high, the influence of low-frequency tuning on the intermediate frequency is acceptable, and the low-frequency main set is designed on the upper antenna, so that the loss generated when a user holds the mobile terminal by hand can be avoided to the greatest extent.
In summary, the radio frequency circuit and the mobile terminal according to the present invention are configured to provide the first antenna 90 connected to the first integrated switch 30, provide the first integrated switch 30 with an output terminal connected to the high frequency diversity receiving terminal of the receiver 20, and provide the first diplexer 60 respectively connected to the first integrated switch 30, the low frequency transmitting terminal of the transmitter 10 and the low frequency main set receiving terminal of the receiver 20, so that the receiver 20 receives the high frequency signal transmitted to the first integrated switch 30 by the first antenna 90 through the high frequency diversity receiving terminal and distributed by the first integrated switch 30, and the first diplexer 60 is configured to receive the signal transmitted by the low frequency transmitting terminal of the transmitter 10 and transmit the signal to the first integrated switch 30, and transmit the signal to the first antenna 90 through the first integrated switch 30, or, the first duplexer 60 is configured to receive the low-frequency signal that is transmitted to the first integrated switch 30 by the first antenna 90 and distributed by the first integrated switch 30, and send the low-frequency signal to the low-frequency main set receiving end of the receiver 20, so that the connected circuit splits each frequency band of the low frequency (700-960 Mhz), the intermediate frequency (1.7G-2.2 Ghz) and the high frequency (2.5G-2.7 Ghz), and can transmit the low-frequency signal, receive the low-frequency main set and the high-frequency diversity signal through the first integrated switch 30, the first duplexer 60 and the first antenna 90, can satisfy the transmission requirement of the low-frequency signal, the low-frequency main set and the high-frequency diversity signal, and through the above-mentioned settings of multiple groups of different frequency bands, can maximally satisfy the CA combining requirement between various frequency bands, thereby solving the problem that when the CA combining of +high in the prior art needs to be supported, the device cost is higher, the loss is larger, and the antenna performance is unfavorable.
It is to be understood that the invention is not limited in its application to the examples described above, but is capable of modification and variation in light of the above teachings by those skilled in the art, and that all such modifications and variations are intended to be included within the scope of the appended claims.
Claims (8)
1. A radio frequency circuit comprising: a transmitter, a receiver, and a first antenna; the radio frequency circuit is characterized by further comprising: a first integrated switch, a first duplexer, an antenna tuner, a second antenna, a second integrated switch, a second duplexer, a third antenna, a third integrated switch, and a third duplexer; the antenna tuner is arranged on the first antenna, the first antenna is connected with a first integrated switch, the output end of the first integrated switch is connected with a high-frequency diversity receiving end of the receiver, the receiver receives a high-frequency signal which is transmitted to the first integrated switch by the first antenna and distributed by the first integrated switch through the high-frequency diversity receiving end, and the antenna tuner is arranged on the first antenna;
the first duplexer is respectively connected with the first integrated switch, a low-frequency transmitting end of the transmitter and a low-frequency main set receiving end of the receiver;
the first duplexer is used for receiving signals sent by the low-frequency transmitting end of the transmitter, sending the signals to the first integrated switch and sending the signals to the first antenna through the first integrated switch;
or the first duplexer is used for receiving the low-frequency signals which are transmitted to the first integrated switch by the first antenna and distributed by the first integrated switch, and transmitting the low-frequency signals to a low-frequency main set receiving end of the receiver;
the second antenna is connected with the second integrated switch, the output end of the second integrated switch is connected with the intermediate frequency diversity receiving end of the receiver, and the receiver receives intermediate frequency signals which are transmitted to the second integrated switch by the second antenna and distributed by the second integrated switch through the intermediate frequency diversity receiving end;
the second diplexer is respectively connected with the second integrated switch, a high-frequency transmitting end of the transmitter and a high-frequency main set receiving end of the receiver;
the second duplexer is used for receiving the signal sent by the high-frequency transmitting end of the transmitter, sending the signal to the second integrated switch and sending the signal to the second antenna through the second integrated switch;
or the second diplexer is used for receiving the high-frequency signals which are transmitted to the second integrated switch by the second antenna and distributed by the second integrated switch, and transmitting the high-frequency signals to a high-frequency main set receiving end of the receiver;
the third antenna is connected with a third integrated switch, the output end of the third integrated switch is connected with a low-frequency diversity receiving end of the receiver, and the receiver receives a low-frequency signal which is transmitted to the third integrated switch by the third antenna and distributed by the third integrated switch through the low-frequency diversity receiving end;
the third duplexer is respectively connected with the third integrated switch, an intermediate frequency transmitting end of the transmitter and an intermediate frequency main set receiving end of the receiver; the third duplexer is used for receiving the signal sent by the intermediate frequency transmitting end of the transmitter, sending the signal to the third integrated switch and sending the signal to the third antenna through the third integrated switch;
or the third duplexer is used for receiving the intermediate frequency signals which are transmitted to the third integrated switch by the third antenna and distributed by the third integrated switch, and transmitting the intermediate frequency signals to an intermediate frequency main set receiving end of the receiver.
2. A mobile terminal comprising a mobile terminal body, wherein the mobile terminal further comprises the radio frequency circuit of claim 1, the radio frequency circuit disposed within the mobile terminal body.
3. The mobile terminal of claim 2, wherein the first antenna is disposed on top of the mobile terminal body.
4. The mobile terminal of claim 2, wherein the second antenna is disposed on a side of the mobile terminal body facing in a top direction.
5. The mobile terminal of claim 2, wherein the third antenna is disposed at a bottom of the mobile terminal body.
6. The mobile terminal according to claim 2, characterized in that it comprises:
the main board is arranged at the top of the mobile terminal body;
the antenna small plate is arranged at the bottom of the mobile terminal body;
and the RF cable is arranged on the side edge, deviating from the second antenna direction, of the middle part of the mobile terminal body and is connected between the main board and the antenna small board.
7. The mobile terminal according to claim 6, wherein the main board is provided with
The radio frequency chip is used for transmitting radio frequency signals.
8. The mobile terminal of claim 6, wherein an antenna dome is disposed on the antenna panel;
the first antenna and the second antenna are connected with the radio frequency signal path through the antenna elastic sheet;
and the third antenna introduces signals into the antenna small plate through the RF cable and is connected with the radio frequency signal path through the antenna shrapnel.
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| CN202110951665.0A CN113810077B (en) | 2021-08-18 | 2021-08-18 | Radio frequency circuit and mobile terminal |
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| CN105471557B (en) * | 2014-08-15 | 2019-06-28 | 深圳市中兴微电子技术有限公司 | A kind of carrier wave polyplant |
| CN106921405A (en) * | 2017-02-28 | 2017-07-04 | 维沃移动通信有限公司 | A kind of radio frequency front-end device |
| CN107483060B (en) * | 2017-07-25 | 2020-01-14 | Oppo广东移动通信有限公司 | Radio frequency circuit, antenna device and electronic equipment |
| CN111355015A (en) * | 2018-12-24 | 2020-06-30 | 北京小米移动软件有限公司 | Mobile terminal |
| WO2021136087A1 (en) * | 2019-12-31 | 2021-07-08 | Oppo广东移动通信有限公司 | Radio frequency module, control method, electronic device and storage medium |
| CN111294081B (en) * | 2020-01-22 | 2022-01-11 | Oppo广东移动通信有限公司 | Radio frequency system and electronic equipment |
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| WO2018014422A1 (en) * | 2016-07-22 | 2018-01-25 | 宇龙计算机通信科技(深圳)有限公司 | Antenna, carrier radio frequency circuit, terminal and carrier aggregation method |
| CN111463551A (en) * | 2020-04-21 | 2020-07-28 | 惠州Tcl移动通信有限公司 | Antenna device and mobile terminal |
| CN112886984A (en) * | 2021-01-26 | 2021-06-01 | Oppo广东移动通信有限公司 | Radio frequency circuit, antenna device and electronic equipment |
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