KR102026678B1 - Integrated antenna appratus with isolation chracteristics for vehicles - Google Patents

Abstract

The present invention relates to a vehicle integrated antenna device having an isolation characteristic, comprising a GPS antenna, a TMU antenna and a CMMB antenna integrally housed inside the shark fin-shaped integrated antenna, the GPS antenna adjacent to the TMU antenna Positioning the CMMB antenna away from the GPS antenna and the TMU antenna to ensure isolation between the CMMB antenna and the GPS antenna and the TMU antenna, and through the band-stop characteristic filter implemented on the conductive pattern of the TMU antenna. By preventing the radiation of the second multiplication frequency signal of the TMU antenna and the GPS antenna to secure the isolation characteristics can improve the transmission and reception performance of the vehicle integrated antenna device.

Description

Vehicle integrated antenna device with isolation characteristics {INTEGRATED ANTENNA APPRATUS WITH ISOLATION CHRACTERISTICS FOR VEHICLES}

The present invention relates to an integrated antenna device for a vehicle having an isolation characteristic. More specifically, the present invention relates to a GPS antenna, a TMU antenna, and a CMMB antenna while integrally accommodating a GPS antenna, a TMU antenna, and a CMMB antenna in an shark fin-shaped integrated antenna. The present invention relates to an integrated antenna device for a vehicle having an isolation characteristic having improved transmission and reception performance by securing an isolation characteristic of the antenna.

With the development of communication devices, various antennas for transmitting and receiving various types of wireless signals are installed in and outside the vehicle.

The various types of wireless signals include global positioning system (GPS) signals, FM and AM radio signals, and digital multimedia broadcasting for watching digital broadcasting in a vehicle. (Digital Multimedia Broadcasting (DMB)) signals, telematics management unit (TMU) signals for telematics communication, and the like.

In addition to the domestic DMB signal, various signals such as the US XM satellite radio signal and SIRIUS signal and the European Digital Audio Broacasting (DAB) signal can be used for watching digital broadcasting. Are being used by countries, and a new China Multimedia Mobile Broadcasting (CMMB) signal is being proposed in China. Different digital broadcast signals used in these countries use different frequency bands. TMU signals also use different frequency bands in different countries.

Related prior art is Korean Patent Publication No. 0787602 (registered December 13, 2007, title of the invention: integrated antenna module for transmission and reception for automobiles).

SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle integrated antenna device having an isolation characteristic between antennas in a vehicle integrated antenna device including a GPS antenna, a TMU antenna, and a CMMB antenna.

An integrated antenna device for a vehicle according to an aspect of the present invention includes a GPS antenna for receiving a GPS signal used by a location-based system, a CMMB antenna for receiving a digital broadcast signal, a TMU antenna for transmitting and receiving a telematics communication signal, and the GPS antenna. A reception circuit unit configured to amplify or filter signals received from the CMMB antenna or the TMU antenna, and output the amplified or filtered signal, a main board on which the GPS antenna, the CMMB antenna, the TMU antenna, and the reception circuit unit are mounted, the GPS antenna, and the CMMB antenna And a case accommodating the TMU antenna and the main board.

In the present invention, the case can be installed in the upper rear of the vehicle, it is characterized in that the front is pointed and takes the form of a shark fin that the body gradually expands toward the rear.

In the present invention, the CMMB antenna is located in front of the motherboard, the TMU antenna is located in the rear on the motherboard, the GPS antenna is located on the bottom surface of the rear on the motherboard adjacent to the TMU antenna. It features.

In the present invention, the GPS antenna includes a feed pin as a ceramic dielectric patch antenna, and the TMU antenna includes a conductive pattern as a printed circuit board antenna having a monopole structure, wherein the TMU antenna has a band blocking characteristic filter at the beginning of the conductive pattern. Characterized in that it comprises a.

In the present invention, the band reject characteristic filter is formed by combining a capacitor and an inductor implemented as a stub on the conductive pattern in series or in parallel, and preventing the signal of the frequency band multiplied by the frequency of the telematics communication signal. It features.

In the present invention, the receiving circuit unit, a CMMB module for amplifying or filtering the digital broadcast signal and output, a GPS module for amplifying or filtering the GPS signal and a TMU module for amplifying or filtering and outputting the telematics signal. It is characterized by including.

In the present invention, the GPS module, the first matching circuit for receiving the GPS signal and outputs a signal matched with a low noise amplifier, a first amplifier for amplifying the signal output from the first matching circuit to a level required for filtering A low noise amplifier, a first band pass filter for passing only a signal of a predetermined frequency band from the signal amplified by the first low noise amplifier and outputting a level required by the location-based system to output a signal output from the first band pass filter. And a second matching circuit configured to receive a signal output by the second low noise amplifier and a second matching circuit to output a signal matched with the location-based system.

In the present invention, the CMMB module, the third matching circuit for receiving the digital broadcast signal and outputs a signal matched with a low noise amplifier, the level required by the digital broadcasting terminal receives the signal output from the third matching circuit A third low noise amplifier for amplifying a signal; a second band pass filter for outputting only a signal of a predetermined frequency band from the signal amplified by the third low noise amplifier; and a signal output from the second band pass filter. And a fourth matching circuit for outputting a signal matching the broadcast terminal.

In the present invention, the feed pin and the conductive pattern are mechanically and electrically connected, and the receiving circuit unit is a signal received through the feed pin and the conductive pattern connected to the mechanical and electrically connected to the GPS signal and telematics signal It further comprises a duplexer for outputting separately, the duplexer is characterized in that for transmitting the GPS signal to the GPS module and the telematics signal to the TMU module.

In the present invention, the conductive pattern is characterized in that passes through the hole passing through the GPS antenna.

According to the present invention, it is possible to improve the transmission and reception performance of the vehicle integrated antenna device by securing the isolation characteristics between the GPS antenna, TMU antenna and CMMB antenna included in the vehicle integrated antenna device.

1 is a perspective view of a vehicle integrated antenna device according to an embodiment of the present invention.
2A is a block diagram of a receiving circuit unit according to an embodiment of the present invention.
2B is a block diagram of a receiving circuit unit according to another embodiment of the present invention.
3A is a circuit diagram of a band stop characteristic filter according to an embodiment of the present invention.
3B is a diagram illustrating a conductive pattern in which a band stop characteristic filter is implemented according to an embodiment of the present invention.
3C is a graph illustrating band stop characteristics of a band stop characteristic filter according to an exemplary embodiment of the present invention.
4 is a block diagram of a GPS module according to an embodiment of the present invention.
5 is a block diagram of a CMMB module according to an embodiment of the present invention.

Hereinafter, a vehicle integrated antenna device according to the present invention will be described in detail with reference to the accompanying drawings. In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, terms to be described below are terms defined in consideration of functions in the present invention, which may vary according to the intention or convention of a user or an operator. Therefore, definitions of these terms should be made based on the contents throughout the specification.

1 is a perspective view of a vehicle integrated antenna device according to an embodiment of the present invention.

As shown in FIG. 1, an integrated antenna device for a vehicle according to an exemplary embodiment of the present invention includes a CMMB antenna 10, a GPS antenna 20, a TMU antenna 30, a main board 40, and a case 50. It can be done by.

The CMMB antenna 10 receives a digital broadcast signal reproduced by a digital broadcast terminal (not shown).

The frequency band of the digital broadcast signal received by the CMMB antenna 10 may be 470 to 800 MHz.

The GPS antenna 20 receives a GPS signal used by a location based system (not shown).

The frequency band of the GPS signal received by the GPS antenna 20 may be an L1 band (about 1575.42 M Hz) or an L2 band (about 1227.60 MHz).

The TMU antenna 30 transmits and receives a telematics communication signal.

The frequency band of the telematics communication signal transmitted and received by the TMU antenna 30 may be about 800 MHz.

The main board 40 includes a CMMB antenna 10, a GPS antenna 20, a TMU antenna 30, and a receiving circuit unit 100.

The receiving circuit unit 100 amplifies or filters the signals received from the GPS antenna, the CMMB antenna, or the TMU antenna and outputs them.

The case 50 has a shape in which the front is sharp and the body gradually expands toward the rear so that the case 50 can be installed at the upper rear of the vehicle, that is, the shark fin shape. The case 50 accommodates a CMMB antenna 10, a GPS antenna 20, a TMU antenna 30, and a main mode 40 therein.

The CMMB antenna 10 may be mounted in front of the main board 40.

The TMU antenna 30 may be a printed circuit board antenna having a monopole structure, and may include a conductive pattern.

The TMU antenna 30 may be located behind the main board 40 and may be mounted in a form in which a printed board constituting the TMU antenna 30 is erected.

The GPS antenna 20 may be a ceramic dielectric patch antenna and may include a feed pin.

The GPS antenna 20 may be located at the rear on the motherboard 40 adjacent to the TMU antenna 30 and may be located at the bottom surface of the motherboard 40.

In this way, by placing the CMMB (10) antenna in front of the main board 40, the GPS antenna 20 and the TMU antenna 30 in the rear of the main board 40, the CMMB (10) antenna and the GPS antenna The isolation characteristic between the 20 and the TMU antenna 30 can be ensured.

In addition, a plurality of antennas such as a CMMB antenna 10, a GPS antenna 20, and a TMU antenna 30 are mounted inside a shark fin-shaped case 50 in which the front is sharp and the body gradually expands toward the rear. By attaching the case 50 to the rear of the upper part of the vehicle, a plurality of antennas for transmitting and receiving various signals are prevented from being damaged due to a collision that may occur by protruding outside the vehicle, and the plurality of antennas are exposed to the outside of the vehicle, The problem of coarse appearance can be solved.

2A is a block diagram of a receiving circuit unit according to an embodiment of the present invention.

As shown in FIG. 2A, the reception circuit unit 100 according to an embodiment of the present invention may include a CMMB module 140, a GPS module 120, a TMU module 130, and a duplexer 110.

As described above with reference to FIG. 1, the GPS antenna 20 and the TMU antenna 30 may be disposed adjacent to the rear side of the main board 40.

In order to arrange the GPS antenna 20 and the TMU antenna 30 adjacent to each other, the feed pin of the GPS antenna 20 and the conductive pattern of the TMU antenna 30 may be mechanically and electrically connected.

The duplexer 110 separates the signal received from the mechanically and electrically connected feed pin and the conductive pattern into a GPS signal and a telematics signal.

The duplexer 110 transmits the separated GPS signal to the GPS module 120 and transmits the separated telematics signal to the TMU module 130.

The TMU module 130 amplifies or filters the telematics signal and outputs it.

The GPS module 120 amplifies or filters the GPS signal and outputs it.

The CMMB module 140 amplifies or filters the digital broadcast signal received by the CMMB antenna 10 and outputs it.

By connecting the feed pin of the GPS antenna 20 and the conductive pattern of the TMU antenna 30 as described above, the GPS antenna 20 and the TMU antenna 30 inside the case 50 of the shark fin-shaped case (board) 40) can be arranged adjacent to the rear.

Accordingly, the distance between the CMMB antenna 10 and the GPS antenna 20 and the TMU antenna 30 disposed in front of the main board 40 is farther away, whereby the CMMB antenna 10 and the GPS antenna 20 are separated. And isolation characteristics between the TMU antennas 30 can be ensured.

2B is a block diagram of a receiving circuit unit according to another embodiment of the present invention.

As shown in FIG. 2B, the receiving circuit unit 100 according to another embodiment of the present invention may include a CMMB module 140, a GPS module 120, and a TMU module 130.

The CMMB module 140 amplifies or filters the digital broadcast signal received by the CMMB antenna 10 and outputs it.

The TMU module 130 amplifies or filters the telematics signal received by the TMU antenna 30 and outputs the amplified or filtered signal.

The GPS module 120 amplifies or filters the GPS signal received by the GPS antenna 20 and outputs it.

The GPS antenna 20 transmits the received GPS signal to the GPS module 120 electrically connected to the feed pin of the GPS antenna 20.

The TMU antenna 30 transmits the received telematics signal to the TMU module 130 electrically connected to the conductive pattern of the TMU antenna 30.

Meanwhile, as described above with reference to FIG. 1, the GPS antenna 20 and the TMU antenna 30 may be disposed adjacent to the rear side of the main board 40.

In order to arrange the GPS antenna 20 and the TMU antenna 30 adjacent to each other, the conductive pattern of the TMU antenna 30 may pass through a hole passing through the GPS antenna 20.

Accordingly, the CMMB antenna 10 disposed in front of the main board 40 may be disposed far away from the GPS antenna 20 and the TMU antenna 30, and thus the CMMB antenna 10 and the GPS antenna 20. ) And the isolation characteristic between the TMU antenna 30 can be ensured.

3A is a circuit diagram of a band stop characteristic filter according to an embodiment of the present invention.

A band stop characteristic filter may be included at the beginning of the conductive pattern included in the TMU antenna 30.

As shown in FIG. 3A, the band reject characteristic filter may be formed by combining a capacitor and an inductor in parallel. The band reject characteristic filter may also be formed by combining a capacitor and an inductor in series.

3B is a diagram illustrating a conductive pattern in which a band stop characteristic filter is implemented according to an embodiment of the present invention.

As shown in FIG. 3B, the band stop characteristic filter may be implemented as a stub on the conductive pattern of the TMU antenna 30.

A stub, a protruding parallel transmission line on a conductive pattern, may act as a capacitor or an inductor depending on its length and the wavelength of the signal flowing through the line. Therefore, by forming a stub of an appropriate length on the conductive pattern, a band reject characteristic filter formed by combining the above-described capacitor and inductor in parallel or in series can be implemented.

3C is a graph illustrating band rejection characteristics of a band rejection characteristic filter according to an embodiment of the present invention.

The band blocking characteristic filter outputs a signal from which the signal of the specific frequency is removed by blocking only a signal of a specific frequency band determined by the capacitance of the capacitor and the inductor.

As shown in FIG. 3C, the band rejection characteristic filter according to an exemplary embodiment of the present invention may have a property of blocking a signal in a 1600 MHz band.

The frequency band of the signal blocked by the band rejection characteristic filter may be a frequency band obtained by multiplying the frequency of the telematics communication signal by twice.

That is, when the frequency band of the telematics signal is about 800 MHz band, the band rejection characteristic filter may block a signal of about 1600 MHz band.

When the TMU antenna 30 is a monopole antenna, in addition to the telematics signal, the signal of the frequency band multiplied twice the frequency band of the telematics signal is also radiated. However, when the frequency band of the telematics signal is about 800 MHz, the 1600 MHz band, which is the frequency band doubled, is near the L1 band (about 1575.42 MHz), which is the frequency band of the GPS signal, so that the TMU antenna 30 and the GPS antenna ( The isolation characteristics between 20) may be degraded.

Therefore, when the signal of the frequency band obtained by multiplying the frequency of the telematics signal radiated from the TMU antenna 30 by using the band blocking characteristic filter is blocked, the signal of the 1600 MHz band is blocked, and thus, the L1 band (about 1575.42 MHz). It is possible to secure the isolation characteristics between the TMU antenna 30 and the GPS antenna 20 by not interfering with the GPS signal.

That is, the TMU antenna disposed adjacent to the rear side on the main board 40 by preventing radiation of the second multiplication frequency signal of the TMU antenna 30 through a band rejection characteristic filter implemented on the conductive pattern of the TMU antenna 30. The isolation characteristic between the 30 and the GPS antenna 20 can be secured.

4 is a block diagram of a GPS module 120 according to an embodiment of the present invention.

As shown in FIG. 4, the GPS module 120 according to an embodiment of the present invention may include a first matching circuit 121, a first low noise amplifier (LNA) 122, and a first band pass filter ( Band Pass Filter (BPF) 123, a second low noise amplifier 124, and a second matching circuit 125.

The first matching circuit 121 receives a GPS signal from the GPS antenna 20 and outputs a signal matching the low noise amplifier.

The first low noise amplifier 122 receives the signal output from the first matching circuit 121 and amplifies the signal to a level required for filtering.

The first bandpass filter 123 passes only signals of a predetermined frequency band from the signals amplified by the first low noise amplifier 122 and outputs the signals.

The predetermined frequency band may be an L1 band (about 1575.42 M Hz) or an L2 band (about 1227.60 MHz) which is a frequency band of the GPS signal.

The second low noise amplifier 124 amplifies the signal output from the first band pass filter 123 to a level required by the location based system.

The second matching circuit 125 receives a signal output from the second low noise amplifier 124 and outputs a signal matching the location-based system.

5 is a block diagram of a CMMB module 140 according to an embodiment of the present invention.

As shown in FIG. 5, the CMMB module 140 according to an embodiment of the present invention may include a third matching circuit 141, a third low noise amplifier 142, a second band pass filter 143, and a fourth matching circuit. And 144.

The third matching circuit 141 receives a digital broadcast signal from the CMMB antenna 10 and outputs a signal matching the low noise amplifier.

The third low noise amplifier 142 receives the signal output from the third matching circuit 141 and amplifies the signal to the level required by the digital broadcasting terminal.

The second band pass filter 143 passes only signals of a predetermined frequency band from the signals amplified by the third low noise amplifier 142 and outputs the signals.

The predetermined frequency band may be 470 to 800 MHz, which is a frequency band of the digital broadcast signal.

The fourth matching circuit 144 receives a signal output from the second band pass filter 143 and outputs a signal matching the digital broadcasting terminal.

As described above, according to the present invention, the CMMB antenna 10 is disposed away from the GPS antenna 20 and the TMU antenna 30 so that the CMMB antenna 10 is between the GPS antenna 20 and the TMU antenna 30. The TMU antenna 30 and the GPS antenna by securing the isolation characteristic of the TMU antenna 30 and preventing radiation of the second multiplication frequency signal of the TMU antenna 30 through a band stop characteristic filter included on the conductive pattern of the TMU antenna 30. It is possible to improve the transmission and reception performance of the vehicle integrated antenna device by securing the isolation characteristics between the 20).

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and those skilled in the art to which the art belongs can make various modifications and other equivalent embodiments therefrom. Will understand. Therefore, the technical protection scope of the present invention will be defined by the claims below.

10: CMMB antenna 20: GPS antenna
30: TMU antenna 40: motherboard
50: case 100: receiving circuit
110: duplexer 120: GPS module
130: TMU module 140: CMMB module
121: first matching circuit 122: first low noise amplifier
123: first bandpass filter 124: second low noise amplifier
125: second matching circuit 141: third matching circuit
142: third low noise amplifier 143: second bandpass filter
144: fourth matching circuit

Claims (10)

A GPS antenna for receiving a GPS signal used by the location based system;
A CMMB antenna for receiving a digital broadcast signal;
A TMU antenna for transmitting and receiving telematics communications signals;
A reception circuit unit for amplifying or filtering signals received from the GPS antenna, the CMMB antenna, or the TMU antenna;
A main board on which the GPS antenna, the CMMB antenna, the TMU antenna, and the receiving circuit unit are mounted; And
Including a case for accommodating the GPS antenna, the CMMB antenna, the TMU antenna, the main board,
The TMU antenna is a monopole structured printed board type antenna including a conductive pattern, and the integrated antenna device for a vehicle, characterized in that it comprises a band blocking characteristic filter at the beginning of the conductive pattern.
The method of claim 1,
The case may be installed in the upper rear of the vehicle, the integrated antenna device for a vehicle, characterized in that it takes the form of a shark fin with a sharp front and gradually expanding the body toward the rear.
The method of claim 1,
The CMMB antenna is located in front of the motherboard,
The TMU antenna is located rearward on the motherboard,
And the GPS antenna is located on a rear surface of the rear of the main board adjacent to the TMU antenna.
The method of claim 3,
And the GPS antenna comprises a feed pin as a ceramic dielectric patch antenna.
The method of claim 1,
The band rejection characteristic filter may be a combination of a capacitor and an inductor implemented as a stub on the conductive pattern in series or in parallel, and block a signal of a frequency band multiplied by a frequency of the telematics communication signal. Automotive integrated antenna device.
The method of claim 1,
The receiving circuit unit,
A CMMB module for amplifying or filtering the digital broadcast signal;
A GPS module for amplifying or filtering the GPS signal and outputting the amplified signal; And
And a TMU module for amplifying or filtering the telematics signal and outputting the amplified or filtered signal.
The method of claim 6,
The GPS module,
A first matching circuit which receives the GPS signal and outputs a signal matching the low noise amplifier;
A first low noise amplifier receiving the signal output from the first matching circuit and amplifying the signal to a level required for filtering;
A first bandpass filter for passing only a signal having a predetermined frequency band from the signal amplified by the first low noise amplifier;
A second low noise amplifier amplifying a signal output from the first band pass filter to a level required by the location-based system; And
And a second matching circuit configured to receive a signal output from the second low noise amplifier and output a signal matching the location-based system.
The method of claim 6,
The CMMB module,
A third matching circuit which receives the digital broadcast signal and outputs a signal matching the low noise amplifier;
A third low noise amplifier receiving the signal output from the third matching circuit and amplifying the signal to a level required by the digital broadcasting terminal;
A second bandpass filter configured to pass only a signal of a predetermined frequency band from the signal amplified by the third low noise amplifier;
And a fourth matching circuit configured to receive a signal output from the second band pass filter and output a signal matched with the digital broadcasting terminal.
The method of claim 6,
The feed pin and the conductive pattern of the GPS antenna are mechanically and electrically connected,
The receiving circuit unit further includes a duplexer for separating and outputting a signal received through the feed pin and the conductive pattern connected to the mechanical and electrically divided into a GPS signal and a telematics signal,
And the duplexer transmits the GPS signal to the GPS module and the telematics signal to the TMU module.
The method of claim 6,
And the conductive pattern passes through a hole passing through the GPS antenna.

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