KR101161207B1 - Unified antenna for vehicle - Google Patents

Abstract

The present invention relates to a vehicle integrated antenna, comprising: a first antenna unit having a helical antenna structure having a plurality of coils; And a feeder through which the received signal of the first antenna unit is transmitted, wherein a grounding part is disposed in the vicinity of the feeder to shift the amplitude of the current transmitted to the feeder to receive a multi-band frequency. do.
Accordingly, by placing a ground part in the vicinity of the feeder to which the received signal of the antenna unit is transmitted, shifting the amplitude of the current transmitted to the feeder, thereby receiving a multi-band signal such as radio and mobile communication in a single antenna. It can be configured to receive a combination of signals corresponding to AM / FM and GSM or GPS frequency band in a single antenna to improve the manufacturing and installation efficiency.

Description

Automotive Integrated Antennas {UNIFIED ANTENNA FOR VEHICLE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an integrated antenna for a vehicle, and more particularly, by arranging a ground part in the vicinity of a power supply unit to which a received signal of an antenna unit is transmitted, thereby displacing the amplitude of the current transmitted to the power supply unit, thereby providing a radio as a single antenna. The present invention relates to an integrated antenna for a vehicle that can receive a multi-band signal such as mobile communication.

Helical antennas capable of receiving radios configured inside a vehicle have been commonly used.

Here, the conventional helical antenna is an antenna having a spiral coil-like structure such that resonance occurs at a length (λ / 4) of the antenna, and such a helical antenna has resonance at a specific frequency depending on the length and pitch.

However, it is very difficult for the helical antenna to have resonance at another resonance frequency desired by the user as resonance occurs at a specific frequency of a single band.

That is, in the case of the conventional helical antenna, although the first resonance is possible, it is difficult to cause the second resonance at a desired frequency, and thus there is a problem in that two frequencies cannot be selectively received.

In addition, it is difficult to tune and a large error occurs, there are many losses in the return value of the resonance frequency, and the tuning state is deformed when the coil is injected by the insert injection method, so that the desired resonance frequency does not come out. there was.

On the other hand, in recent years, as a variety of services such as mobile communication is commercialized, vehicles are equipped with the development of such new electronic products and equipments to which the mobile communication technology is applied.

In addition, in order to satisfy various needs of consumers, new applications of electronic products such as vehicle Internet, TV reception, navigation system, digital multimedia broadcasting (DMB), etc. are being developed.

That is, in the past, the function of the vehicle was simply to provide only mobility to the consumer. Recently, the vehicle has been developed to provide a safe, comfortable, and efficient vehicle.

Accordingly, there is a demand for a new antenna system for a vehicle for a variety of wireless services provided in a vehicle, such as a vehicle Internet, a TV reception, a navigation system, a digital multimedia broadcasting (DMB), and the like. The situation is complicated and diversified.

However, in the conventional vehicle antenna system, receiving antennas for various wireless services are individually configured according to each wireless service.

As described above, the installation of individual antennas for each wireless service has a fundamental problem such as an increase in installation limit and installation cost in a limited space of a vehicle.

The present invention has been made to solve the above problems, an object of the present invention, by disposing the ground portion in the vicinity of the feed portion to which the received signal of the antenna unit is transmitted by displacing the amplitude of the current delivered to the feed portion, The present invention provides a vehicle integrated antenna capable of receiving a combination of multi-band signals such as radio, mobile communication, and GPS as a single antenna.

Still another object of the present invention is to provide a vehicle integrated antenna that can be configured to receive a combination of signals corresponding to AM / FM and GSM or GPS frequency band in a single antenna to improve the manufacturing and installation efficiency have.

The object is, according to the present invention, a first antenna unit provided in a helical antenna structure having a plurality of coils; And a feeder unit to which the received signal of the first antenna unit is transmitted, wherein the ground unit is disposed in the vicinity of the feeder unit and receives a multi-band frequency by shifting the amplitude of the current transmitted to the feeder unit. Can be achieved by

Here, the vehicle integrated antenna, the pad; A lower housing disposed above the pad; A main printed circuit board mounted on the lower housing; And an upper housing coupled to the pad and covering the main printed circuit board and the lower housing, wherein the first antenna unit is connected to the feeding part through a terminal on the upper housing side.

In addition, the main printed circuit board further includes an auxiliary printed circuit board which is connected to an upper surface of the main printed circuit board, and the auxiliary printed circuit board includes a power supply unit connected to the first antenna unit and the power supply unit. One or more grounding units disposed nearby may be formed in a conductor-shaped pattern.

Alternatively, the host printed circuit board may further include an auxiliary printed circuit board that is directly connected to an upper surface of the host printed circuit board, and the feeder connected to the first antenna unit is formed in a conductive pattern on the auxiliary printed circuit board. One or more ground parts disposed in the vicinity of the feeder part and installed separately from the auxiliary printed circuit board may be provided in a conductive pattern.

Here, the feed part and the ground part may be spaced apart at predetermined intervals, and may be disposed close to each other.

In addition, when the feed part and the ground part are formed on the auxiliary printed circuit board at the same time, the feed part and the ground part have a separation interval in the range of 1 to 6 (mm), the feed part is formed on the auxiliary printed circuit board, When the ground part is installed separately from the auxiliary printed circuit board, the feed part and the ground part may be provided to have a separation interval in a range of 1 to 10 (mm).

According to the present invention, a multi-band signal such as radio, mobile communication, etc. is combined with a single antenna by disposing a ground part in the vicinity of a power supply unit through which the received signal of the antenna unit is transmitted, thereby displacing the amplitude of the current transmitted to the power supply unit. It can be received as, there is an effect that can be miniaturized compared to the conventional integrated antenna.

In addition, it is possible to improve the fabrication and installation efficiency by configuring to receive a combination of signals corresponding to AM / FM and GSM or GPS frequency band in a single antenna.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.
1 is a combined perspective view of a vehicle integrated antenna according to the present invention,
2 is a circuit diagram of an integrated antenna for a vehicle according to the present invention;
3 is an enlarged side view of a partial perspective view and an auxiliary printed circuit board of an integrated antenna for a vehicle according to the present invention;
4 is a side view and a plan view of an auxiliary printed circuit board of an integrated antenna for a vehicle according to another exemplary embodiment of the present disclosure.
Figure 5 (a) is a graph showing the return loss (Return Loss) in the GSM850 / 1900 frequency band of the integrated vehicle antenna according to the invention, Figure 6 (b) is GSM850 / of the integrated antenna for vehicles according to the invention This graph shows the voltage standing wave ratio (VSWR) characteristics in the 1900 frequency band.
FIG. 6A is a graph showing return loss in the GSM900 / 1800 frequency band of the integrated antenna for a vehicle according to another embodiment of the present invention, and FIG. 6B is another embodiment of the present invention. Is a graph showing the voltage standing wave ratio (VSWR) characteristics in GSM900 / 1800 frequency band of the integrated antenna for vehicles according to the present invention.

1 to 4, an integrated antenna for a vehicle according to the present invention includes a first antenna unit 10 provided with a helical antenna structure in which a plurality of coils are formed; And a power supply unit 20 through which the received signal of the first antenna unit 10 is transmitted, and a ground unit 30 connected to the ground in the vicinity of the power supply unit 20 is disposed to supply the power supply unit 20. It may be arranged to receive a multi-band frequency by shifting the amplitude of the current delivered to the).

Conventional automotive integrated antennas that receive multiple bands of frequency typically use parallel resonance at low frequencies to cut off the current flowing into the LC circuit to obtain the corresponding resonance over the entire antenna length, and at high frequencies use LC circuits with series resonance. It is basic to obtain resonance in the antenna that is about half the length by shorting the circuit, but it is very difficult to realize the optimal antenna due to the influence on the nearby equipment due to the actual antenna structure.

Therefore, the core of the present invention is to place the ground portion 30 near the feed section 20 through which the frequency signal is transmitted to the integrated antenna for the vehicle, thereby displacing the current flow amplitude to optimize the optimum gain, radiation pattern, The present invention provides an integrated antenna for a vehicle that can have a voltage standing wave ratio.

Here, the vehicle integrated antenna, the pad 40; A lower housing (50) disposed above the pad (40); A main printed circuit board 60 mounted on the lower housing 50; It may be coupled to the pad 40, the upper housing 70 to cover the main circuit board 60 and the lower housing 50; it may be provided to include.

In addition, the first antenna unit 10 is connected to the power supply unit 20 through a terminal of the upper housing 70.

Here, the first antenna unit 10, as shown in Figure 3, the power supply unit 20 formed on the auxiliary printed circuit board 80 which will be described later, the connection portion formed at the end of the first antenna unit 10 Is in contact with the connecting groove portion is located is connected to the host circuit board (60).

Here, the host printed circuit board 60 further includes an auxiliary printed circuit board 80 that is connected to the upper surface of the host printed circuit board 60, and the first printed circuit board 80 includes the first printed circuit board 80. The feeder unit 20 connected to the antenna unit 10 and at least one grounding unit 30 disposed in the vicinity of the feeder unit 20 are coated on the auxiliary printed circuit board 80 in the form of a conductor. Can be formed.

That is, the feeder 20 and the grounded portion 30 are formed on the auxiliary printed circuit board 80 in a conductor pattern, and the feeder 20 and the grounded portion 30 are separated by a predetermined distance D1. By being spaced apart, the amplitude of the current delivered to the power supply unit 20 by the ground unit 30 is changed to receive a frequency of multiple bands.

Alternatively, the host printed circuit board 60 further includes an auxiliary printed circuit board 80 which is connected to an upper surface of the host printed circuit board 60, and the first printed circuit board 80 includes the first antenna. The power supply unit 20 connected to the unit 10 is formed in a pattern coated on the auxiliary printed circuit board 80 in the form of a conductor, and is disposed in the vicinity of the power supply unit 20, and the auxiliary printed circuit board ( One or more grounding portions 30 separately installed from 80 may be provided in a conductor pattern.

That is, the feeder 20 is formed on the auxiliary printed circuit board 80, and the ground portion 30 is disposed near the feeder 20, independently of the auxiliary printed circuit board 80. It is arranged to be spaced apart from the feeder 20 by a predetermined distance.

As described above, the power supply unit 20 and the ground unit 30 may be simultaneously formed on the auxiliary printed circuit board 80, and the power supply unit 20 may be connected to the auxiliary printed circuit board 80. 30 may be formed in the vicinity of the auxiliary printed circuit board 80. As shown in FIG. 5, a plurality of ground parts 30 may be provided to assist the ground part 30a formed in the auxiliary printed circuit board 80 and the auxiliary parts. The printed circuit board 80 may be provided to be spaced apart by a predetermined distance D2.

That is, by arranging at least one grounding portion 30 in the vicinity of the power feeding portion 20, the displacement of the current amplitude can be selectively adjusted, and thus the frequency band received by the first antenna unit 10. You can adjust the variety.

3 to 4, the feeder 20 and the grounder 30 are illustrated as being formed on one side of the auxiliary printed circuit board 80, but are not limited thereto. Of course, it may be provided opposite to both sides of the 80).

Here, the power supply unit 20 and the ground unit 30, as shown in Figures 3 to 4, are spaced apart at a predetermined interval (D1), can be disposed close to each other, the power supply unit 20 Since the and the ground unit 30 are disposed close to each other, it is possible to receive the frequency of the multi-band by shifting the current amplitude in the power supply unit 20 by the ground unit 30.

In addition, when the feed section 20 and the ground section 30 is formed on the auxiliary printed circuit board 80 at the same time, the feed section 20 and the ground section 30 is in the range of 1 ~ 6 (mm) It may be provided to have a spaced interval (D1).

Here, when the separation interval is provided less than 1mm, there is a possibility that the feeder 20 and the grounding portion 30 is in contact with each other in the actual process, when the separation interval is provided exceeding 6mm, the current amplitude There is a problem that the displacement of the control is not easy.

In addition, when the feed section 20 and the ground section 30 has a separation interval in the above range, the horizontal length of the auxiliary printed circuit board 80 is 4 ~ 25 (mm), vertical on the side The length of is preferably formed of 4 ~ 30 (mm).

In this case, as shown in FIG. 4, the length L1 of the connection portion disposed at the end of the first antenna unit 10 is formed to be approximately 20 (mm), and the length (bar) of the bar extending from the connection portion ( L2) is formed to approximately 40 (mm), the length (L3) of the feed section 20 is formed to approximately 20 (mm) to implement an antenna having a total length of approximately 80 (mm), By appropriately adjusting the separation distance D1 between the whole 20 and the ground portion 30 within the above-mentioned range, the radio signal as well as the signals of the GSM850 of the 824-894 (MHz) band and the GSM1900 of the 1850-1975 (MHz) band Signal and GPS signal can be received at the same time.

On the other hand, the feeder 20 is formed on the auxiliary printed circuit board 80, when the ground portion 30 is provided separately from the auxiliary printed circuit board 80, the feeder 20 and As shown in FIG. 4, the ground portion 30b may be provided to have a spaced interval D2 in a range of 1 to 10 (mm).

Here, when the separation interval is provided less than 1mm, there is a possibility that the feeder 20 and the grounding portion 30b is in contact with each other in the actual process, when the separation interval is provided in excess of 10mm, the current amplitude There is a problem that the displacement of the control is not easy.

Meanwhile, the host circuit board 60 further includes a second antenna unit 90 for receiving a signal of a GPS frequency band, and the second antenna unit 90 is on the host circuit board 60. It is provided with a patch antenna mounted on the board to receive a GPS signal.

In addition, the main circuit board 60, as shown in Figure 2, the FM amplifier unit 61 for amplifying the signal of the FM frequency band received by the first antenna unit 10; An FM matching circuit section 62 for matching the FM frequency band signal amplified by the FM amplifier section 61; An AM filter unit (63) for filtering signals in the AM frequency band received by the first antenna unit (10); An AM amplifier unit 64 for amplifying a signal of an AM frequency band processed by the AM filter unit 63; A GPS amplifier unit 65 for amplifying a signal of a GPS frequency band received by the second antenna unit 90; A GPS filter unit 66 for filtering signals in the GPS frequency band amplified by the GPS amplifier unit 65; A multiplexer 67 to which a frequency signal of a global system for mobile communications (GSM) received by the first antenna unit 10 and a GPS frequency signal passed through the GPS amplifier unit 65 are input; ; A first output part 68 connected to the FM matching circuit part 62 and the AM amplifier part 64; And a second output unit 69 connected to the multiplexer 67.

That is, as shown in FIG. 2, in the integrated antenna for a vehicle according to the present invention, a signal received from the first antenna unit 10 is amplitude-shifted by the ground unit 30 so that a signal of a radio band (AM / FM) is FM. Passed to the amplifier unit 61 or the AM filter unit 63 is output to the final first output unit 68, the signal of the mobile communication band (GSM) is transmitted to the multiplexer 67, the second output unit 69 Will be printed).

In addition, the signal received from the second antenna unit 10 is input to the GPS amplifier unit 65, is transmitted to the multiplexer 67 via the GPS filter unit 66 is output to the second output unit 69. .

Here, the multiplexer 67 is a component for converting a plurality of inputs into a single output. The multiplexer 67 may be provided as a kind of data selector, and according to control, a signal of a mobile communication band (GSM) and a GPS band. The signal selected from among the input signals of may be provided to output to the second output unit (69).

Hereinafter, an embodiment of an integrated antenna for a vehicle according to the present invention will be described in more detail with reference to FIGS. 5 to 6.

Figure 5 (a) is a graph showing the return loss (Return Loss) in the GSM850 / 1900 frequency band of the integrated vehicle antenna according to the invention, Figure 5 (b) is GSM850 / of the integrated antenna for vehicles according to the present invention Figure 6 is a graph showing the voltage standing wave ratio (VSWR) characteristics in the 1900 frequency band, Figure 6 (a) shows the return loss (Return Loss) in the GSM900 / 1800 frequency band of the integrated antenna for a vehicle according to another embodiment of the present invention 6B is a graph showing voltage standing wave ratio (VSWR) characteristics in the GSM900 / 1800 frequency band of the integrated antenna for a vehicle according to another exemplary embodiment of the present invention.

Referring to FIG. 5, in the integrated antenna for a vehicle according to the present invention, return loss in the frequency band (GSM850) of 824MHz to 894MHz is reduced than return loss of other bands, and from 1850MHz to 1975MHz Return loss in the frequency band up to (GSM1900) is less than the return loss of the other band (Return Loss).

In addition, in the integrated antenna for a vehicle according to the present invention, the voltage standing wave ratio VSWR in the frequency band GSM850 / 1900 is lower than that of other standing bands VSWR.

Therefore, the multi-band integrated antenna for a vehicle according to the present invention can be seen that the reception is good because the reflection loss is small in the GSM850 frequency band and GSM1900 frequency band range.

Referring to FIG. 6, in the integrated antenna for a vehicle according to another exemplary embodiment of the present invention, return loss in the frequency band GSM900 of 880MHz to 915MHz is reduced than return loss of other bands. In the frequency band (GSM1800) from 1710 MHz to 1880 MHz, the return loss is decreasing than the return loss of other bands.

In addition, in the integrated antenna for a vehicle according to another exemplary embodiment of the present invention, the voltage standing wave ratio VSWR in the frequency band GSM900 / 1800 is lower than that of other standing bands VSWR.

Therefore, the multi-band integrated antenna for a vehicle according to another embodiment of the present invention can be seen that the reception is good because there is little return loss in the GSM900 frequency band and GSM1800 frequency band range.

Description of the Related Art [0002]
10: first antenna unit 20: feeding part
30: ground portion 40: pad
50: lower housing 60: host circuit board
61: FM amplifier 62: FM matching circuit
63: AM filter unit 64: AM amplifier unit
65: GPS amplifier 66: GPS filter
67: multiplexer 68: first output unit
69: second output unit 70: upper housing
80: auxiliary printed circuit board 90: second antenna unit

Claims (6)

A first antenna unit provided in a helical antenna structure in which a plurality of coils are formed;
And a feeding unit to which the received signal of the first antenna unit is transmitted.
An integrated antenna for a vehicle receiving a multi-band frequency by displacing the amplitude of the current delivered to the feed portion is disposed in the vicinity of the feed portion,
The vehicle integrated antenna includes a pad;
A lower housing disposed above the pad;
A main printed circuit board mounted on the lower housing;
And an upper housing coupled to the pad and covering the main printed circuit board and the lower housing.
The first antenna unit is connected to the feed section through a terminal on the upper housing side,
The main printed circuit board further includes an auxiliary printed circuit board which is connected to the upper surface of the main printed circuit board. The auxiliary printed circuit board further includes a power supply part connected to the first antenna unit and adjacent to the power supply part. The integrated antenna for a vehicle, characterized in that the at least one ground portion is formed in a conductive pattern. delete delete The method of claim 1,
The main printed circuit board further includes an auxiliary printed circuit board which is directly connected to an upper surface of the main printed circuit board, wherein the feeder connected to the first antenna unit is formed in a conductive pattern. The integrated antenna for a vehicle, which is disposed in the vicinity of the feeder and is provided separately from the auxiliary printed circuit board, in which at least one ground part is provided in a conductive pattern. The method of claim 4, wherein
The power feeding unit and the grounding unit are spaced apart at a predetermined interval, the vehicle integrated antenna, characterized in that disposed close to each other. The method of claim 5, wherein
When the feed part and the ground part are simultaneously formed on the auxiliary printed circuit board, the feed part and the ground part have a spaced interval of 1 to 6 (mm), and the feed part is formed on the auxiliary printed circuit board and the ground When the auxiliary printed circuit board is installed separately from the auxiliary printed circuit board, the feeder and the grounding unit having a separation interval of 1 ~ 10 (mm) range.

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