KR20150009395A - Integrated antenna appratus with isolation chracteristics for vehicles - Google Patents

Abstract

The present invention relates to an integrated antenna apparatus for a vehicle with the isolation characteristics. The integrated antenna apparatus, which is implemented in the shape of a shark fin, includes a GPS antenna, a TMU antenna, and a CMMB antenna which are all integrally stored inside. The GPS antenna is arranged near the TMU antenna, and the CMMB antenna is spaced apart from the GPS and TMU antennas. Accordingly, the CMMB antenna can acquire the isolation characteristics from the GPS and TMU antennas. The radiation of the secondary multiplication frequency signals from the TMU antenna can be prevented through the band elimination characteristic filter implemented on a conductive pattern of the TMU antenna. Accordingly, the TMU and GPS antennas also can acquire the isolation characteristics to enhance the transmission performance of the integrated antenna apparatus for a vehicle.

Description

[0001] INTEGRATED ANTENNA APPRATUS WITH ISOLATION CHRACTERISTICS FOR VEHICLES [0002]

[0001] The present invention relates to an integrated antenna device for a vehicle that secures isolation characteristics, and more particularly, to a GPS antenna, a TMU antenna, and a CMMB antenna in which a GPS antenna, a TMU antenna, and a CMMB antenna are integrally housed in a shark- The present invention relates to an integrated antenna device for a vehicle that secures isolation characteristics and secures isolation characteristics.

As communications equipment develops, a variety of antennas for transmitting and receiving various types of radio signals are installed inside and outside the vehicle.

The various types of wireless signals include a Global Positioning System (GPS) signal, an FM and AM radio signal for utilizing a location-based system provided by a vehicle, a digital multimedia broadcasting (Digital Multimedia Broadcasting) signal, a telematics management unit (TMU) signal for telematics communication, and the like.

Meanwhile, in addition to the domestic DMB signals, signals for watching digital broadcasting include various signals such as XM satellite radio signals and SIRIUS signals of the United States and digital audio broaching (DAB) signals of Europe, Is being used by each country, and in China, a signal of China Multimedia Mobile Broadcasting (CMMB) is proposed. Different digital broadcasting signals used in these countries use different frequency bands. The TMU signal also uses different frequency bands for different countries.

A related prior art is Korean Patent Registration No. 0787602 (Registered on Dec. 13, 2007, entitled: Integrated antenna module for automotive transmission and reception).

It is an object of the present invention to provide an integrated antenna device for a vehicle that secures isolation characteristics between antennas in an integrated antenna device for a vehicle including a GPS antenna, a TMU antenna, and a CMMB antenna.

The integrated antenna device for a vehicle according to one aspect of the present invention includes a GPS antenna for receiving a GPS signal used by a position based system, a CMMB antenna for receiving a digital broadcasting signal, a TMU antenna for transmitting and receiving a telematics communication signal, A GPS antenna, a CM antenna, a TMU antenna, a main board on which the receiving circuit is mounted, a GPS antenna, and a CM antenna, , The TMU antenna, and a case for accommodating the main board.

In the present invention, the case may be installed at the rear of the upper portion of the vehicle, and the shark fin may have a sharp front and a gradually expanding body toward the rear.

In the present invention, the CMMB antenna is located on the front side of the main board, the TMU antenna is located on the rear side of the main board, and the GPS antenna is located on the bottom surface of the main board adjacent to the TMU antenna .

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 planar antenna of a monopole structure, and the TMU antenna includes a band stop characteristic filter And a control unit.

In the present invention, the band-stop characteristic filter includes a capacitor and an inductor implemented as a stub on the conductive pattern, which are combined in series or in parallel, to block a signal in a frequency band in which the frequency of the telematics communication signal is doubled .

In the present invention, the receiving circuit unit may include a CMMB module for amplifying or filtering the digital broadcasting signal, a GPS module for amplifying or filtering the GPS signal, and a TMU module for amplifying or filtering and outputting the telematics signal, .

The GPS module may include a first matching circuit that receives the GPS signal and outputs a signal matched with the low noise amplifier, a second matching circuit that receives the signal output from the first matching circuit and amplifies the signal to a level required for filtering, A first band-pass filter for passing only a signal of a predetermined frequency band from a signal amplified by the first low-noise amplifier and outputting the signal, and a second band-pass filter for outputting a signal output from the first band-pass filter to a level And a second matching circuit receiving a signal output from the second low noise amplifier and outputting a signal matched with the position based system.

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

In the present invention, the feed pin and the conductive pattern are mechanically and electrically connected, and the receiving circuit portion receives the signal transmitted through the mechanically and electrically connected feed pin and the conductive pattern as a GPS signal and a telematics signal Wherein the duplexer transmits the GPS signal to the GPS module and transmits the telematics signal to the TMU module.

In the present invention, the conductive pattern passes through a hole penetrating the GPS antenna.

According to the present invention, it is possible to secure the isolation characteristics between the GPS antenna, the TMU antenna, and the CMMB antenna included in the vehicle integrated antenna device, thereby improving the transmission / reception performance of the vehicle integrated antenna device.

1 is a perspective view of an integrated antenna device for a vehicle according to an embodiment of the present invention.
2A is a block diagram of a receiving circuitry in accordance with an embodiment of the present invention.
2B is a block diagram of a receiving circuit according to another embodiment of the present invention.
3A is a circuit diagram of a band suppression filter according to an embodiment of the present invention.
FIG. 3B is a diagram illustrating a conductive pattern in which a band-stop characteristic filter according to an embodiment of the present invention is implemented.
FIG. 3C is a graph illustrating band suppression characteristics of a band suppression filter according to an exemplary embodiment of the present invention. Referring to FIG.
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, an integrated antenna apparatus for a vehicle according to the present invention will be described in detail with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

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

1, the integrated antenna device for a vehicle according to an 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 .

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

The frequency band of the digital broadcasting 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 the L1 band (about 1575.42 M Hz) or the 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 / received by the TMU antenna 30 may be about 800 MHz.

The CMMB antenna 10, the GPS antenna 20, the TMU antenna 30, and the receiving circuit unit 100 are mounted on the main board 40.

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

The case 50 takes the form of a pointed front and a gradually expanding body toward the rear, that is, a shark fin, so as to be installed at the upper rear of the vehicle. 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 and mounted thereon.

The TMU antenna 30 may be a plate-shaped antenna of a monopole type, and may include a conductive pattern.

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

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

The GPS antenna 20 may be located on the rear side of the main board 40 adjacent to the TMU antenna 30 and may be located on the bottom surface of the main board 40. [

By positioning the CMMB 10 antenna in front of the main board 40 and positioning the GPS antenna 20 and the TMU antenna 30 behind the main board 40, The isolation characteristic between the antenna 20 and the TMU antenna 30 can be ensured.

A plurality of antennas such as a CMMB antenna 10, a GPS antenna 20, and a TMU antenna 30 are mounted in a case 50 having a sharp front and a gradually expanding body toward the rear, By attaching the case 50 to the rear of the upper portion of the vehicle, it is possible to prevent breakage due to collision that may occur due to protrusion of a plurality of antennas for transmitting / receiving various signals to the outside of the vehicle, The problem that the appearance becomes coarse can be solved.

2A is a block diagram of a receiving circuitry in accordance with an embodiment of the present invention.

2A, the receiving circuit unit 100 may include a CMMB module 140, a GPS module 120, a TMU module 130, and a duplexer 110.

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

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

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

The GPS antenna 20 and the TMU antenna 30 are connected to the main board (not shown) inside the shark fin type case 50 by connecting the feed pin of the GPS antenna 20 and the conductive pattern of the TMU antenna 30, 40).

The CMMB antenna 10 and the GPS antenna 20 are separated from each other by the distance between the CMMB antenna 10 disposed on the main board 40 and the GPS antenna 20 and the TMU antenna 30, And the TMU antenna 30 can be ensured.

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

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

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

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

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

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.

1, the GPS antenna 20 and the TMU antenna 30 may be disposed adjacent to the rear side of the main board 40. In this case,

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 can pass through the hole passing through the GPS antenna 20. [

The CMMB antenna 10 disposed on the main board 40 may be disposed far away from the GPS antenna 20 and the TMU antenna 30 so that the CMMB antenna 10 and the GPS antenna 20 ) And the TMU antenna 30 can be ensured.

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

At the beginning of the conductive pattern included in the TMU antenna 30, a band stop characteristic filter may be included.

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

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

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.

The stub, which is a projected parallel transmission line on the conductive pattern, may operate as a capacitor or an inductor depending on its length and the wavelength of a signal flowing in the line. Therefore, by forming a stub having an appropriate length on the conductive pattern, a band-stop characteristic filter in which the above-described capacitor and inductor are combined in parallel or in series can be realized.

FIG. 3C is a graph illustrating band suppression characteristics of a band suppression filter according to an exemplary embodiment of the present invention. Referring to FIG.

The band rejection characteristic filter blocks a signal of a specific frequency band determined according to the capacitance of the capacitor and the inductor in the input signal and outputs a signal from which the signal of the specific frequency is removed.

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

Here, the frequency band of the signal blocked by the band blocking filter may be a frequency band twice the frequency of the telematics communication signal.

That is, when the frequency band of the telematics signal is about 800 MHz, the band stop characteristic filter can block the signal of about 1600 MHz band.

When the TMU antenna 30 is a monopole antenna, a signal in a frequency band twice the frequency band of the telematics signal is emitted in addition to the telematics signal. However, when the frequency band of the telematics signal is about 800 MHz, the frequency band of 1600 MHz which is twice the frequency of the telematics signal is near the L1 band (about 1575.42 MHz), which is the frequency band of the GPS signal. 20 may be deteriorated.

Therefore, when the signal of the frequency band in which the frequency of the telematics signal radiated from the TMU antenna 30 is doubled is blocked using the band suppression filter, the signal of the 1600 MHz band is blocked. Therefore, the L1 band (about 1575.42 MHz So that isolation characteristics between the TMU antenna 30 and the GPS antenna 20 can be ensured.

That is, by preventing the emission of the second order frequency signal of the TMU antenna 30 through the band-stop characteristic filter implemented on the conductive pattern of the TMU antenna 30, the TMU antenna 30 disposed adjacent to the rear side on the main board 40 The isolation characteristic between the antenna 30 and the GPS antenna 20 can be ensured.

4 is a block diagram of a GPS module 120 in accordance with an embodiment of the present invention.

4, the GPS module 120 according to an embodiment of the present invention includes a first matching circuit 121, a first low noise amplifier (LNA) 122, a first band pass filter A band pass filter (BPF) 123, a second low noise amplifier 124, and a second matching circuit 125. [

The first matching circuit 121 receives the GPS signal from the GPS antenna 20 and outputs a signal matched with 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 band pass filter 123 passes only a signal of a predetermined frequency band from the signal amplified by the first low noise amplifier 122 and outputs the signal.

Here, the predetermined frequency band may be the L1 band (about 1575.42 M Hz) or the L2 band (about 1227.60 MHz) which is the 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 position-based system.

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

5 is a block diagram of a CMMB module 140 in accordance with an embodiment of the present invention.

5, the CMMB module 140 according to an exemplary embodiment of the present invention includes a third matching circuit 141, a third low-noise amplifier 142, a second band-pass filter 143, (144).

The third matching circuit 141 receives the digital broadcasting signal from the CMMB antenna 10 and outputs a signal matched with 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 a level required by the digital broadcasting terminal.

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

Here, the predetermined frequency band may be 470 to 800 MHz, which is the frequency band of the digital broadcasting signal.

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

As described above, according to the present invention, the CMMB antenna 10 is disposed at a distance from the GPS antenna 20 and the TMU antenna 30, so that the distance between the CMMB antenna 10 and the GPS antenna 20 and the TMU antenna 30 The TMU antenna 30 and the GPS antenna 30 can be isolated from each other by preventing the emission of the second order frequency signal of the TMU antenna 30 through the band suppression filter included in the conductive pattern of the TMU antenna 30. [ 20 can be secured and the transmission / reception performance of the vehicle integrated antenna device can be improved.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand. Accordingly, the technical scope of the present invention should be defined by the following claims.

10: CMMB antenna 20: GPS antenna
30: TMU antenna 40: main board
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 band-pass filter 124: second low-noise amplifier
125: second matching circuit 141: third matching circuit
142: third low-noise amplifier 143: second band-pass filter
144: fourth matching circuit

Claims (10)

A GPS antenna for receiving GPS signals used by the location based system;
A CMMB antenna for receiving a digital broadcast signal;
A TMU antenna for transmitting and receiving telematics communication signals;
A receiving 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 are mounted; And
And a case for housing the GPS antenna, the CMMB antenna, the TMU antenna, and the main board.
The method according to claim 1,
Wherein the case is installed at the rear of the upper portion of the vehicle and has a sharp front shape and a shark fin shape in which the body progressively extends toward the rear.
The method according to claim 1,
Wherein the CMMB antenna is located in front of the main board,
The TMU antenna is located on the rear side of the main board,
Wherein the GPS antenna is located on the bottom surface of the rear side of the main board adjacent to the TMU antenna.
The method of claim 3,
Wherein the GPS antenna comprises a feed pin as a ceramic dielectric patch antenna,
Wherein the TMU antenna comprises a conductive pattern as a planar antenna of a monopole type printing plate,
Wherein the TMU antenna comprises a band stop characteristic filter at the beginning of the conductive pattern.
5. The method of claim 4,
Wherein the band-stop characteristic filter comprises a capacitor and an inductor implemented as a stub on the conductive pattern in series or in parallel, and blocks a signal in a frequency band in which the frequency of the telematics communication signal is doubled Integrated antenna device for vehicles.
5. The method of claim 4,
The receiving circuit unit,
A CMMB module for amplifying or filtering the digital broadcasting signal and outputting the amplified or filtered digital broadcasting signal;
A GPS module for amplifying or filtering the GPS signal and outputting the GPS signal; And
And a TMU module for amplifying or filtering the telematics signal and outputting the amplified or filtered telematics signal.
The method according to claim 6,
The GPS module includes:
A first matching circuit receiving the GPS signal and outputting a signal matched with the low noise amplifier;
A first low noise amplifier for receiving a signal output from the first matching circuit and amplifying the signal to a level required for filtering;
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 the signal;
A second low-noise amplifier for amplifying a signal output from the first band-pass filter to a level required by the position-based system; And
And a second matching circuit receiving a signal output from the second low noise amplifier and outputting a signal matched with the position based system.
The method according to claim 6,
The CMMB module includes:
A third matching circuit receiving the digital broadcasting signal and outputting a signal matched with the low noise amplifier;
A third low noise amplifier receiving a signal output from the third matching circuit and amplifying the signal to a level required by the digital broadcasting terminal;
A second band pass filter for passing only a signal of a predetermined frequency band from the signal amplified by the third low noise amplifier and outputting the signal;
And a fourth matching circuit receiving a signal output from the second band-pass filter and outputting a signal matched with the digital broadcasting terminal.
The method according to claim 6,
Wherein the feed pin and the conductive pattern are mechanically and electrically connected,
The receiving circuit unit may further include a feed pin connected mechanically and electrically, and a duplexer for separating a signal received through the conductive pattern into a GPS signal and a telematics signal,
Wherein the duplexer transmits the GPS signal to the GPS module and transmits the telematics signal to the TMU module.
The method according to claim 6,
Wherein the conductive pattern passes through a hole passing through the GPS antenna.

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