KR200496264Y1 - Vehicle rear glass antenna - Google Patents

Abstract

The present invention is a first antenna unit formed at a predetermined position on the rear glass of a vehicle, receiving a power supply signal and connected to a ground power source, and a first antenna unit on the upper side or lower side of the first antenna unit on the rear glass of the vehicle at a predetermined interval from the first antenna unit. It is possible to improve the gain of the rear glass antenna, including a second antenna unit that is spaced apart and coupled with the first antenna unit to receive a feed signal and ground power, and reduces the difference in gain in the entire band to increase frequency It is possible to provide a vehicle rear glass antenna capable of reducing a difference in reception performance according to the present invention.

Description

Vehicle rear glass antenna {Vehicle rear glass antenna}

The present invention relates to a rear glass antenna for a vehicle, and relates to a rear glass antenna having an improved gain.

Recently, various types of communication devices are installed in vehicles as vehicles become multi-functional and high-performance as well as various smart functions are required. As the number of in-vehicle communication devices increases, a plurality of antennas are required together.

In current vehicles, a heat wire pattern is formed on the rear glass to prevent fogging or blurring due to temperature or humidity. Accordingly, in many vehicles, an antenna is formed on the rear glass of the vehicle along with the hot wire pattern or the hot wire pattern itself is used as an antenna.

1 shows an example of a conventional rear glass antenna.

1 illustrates a rear glass antenna using a hot wire pattern as an antenna as an example. Referring to FIG. 1, the conventional rear glass antenna 100 includes a power supply bus bar 110 formed on one side of the rear glass, a ground bus bar 120 formed on the other side, and a power supply bus bar 110 and a ground bus. A plurality of radiation pattern lines 130 connected between the bars 120 may be included. Here, as shown in FIG. 1 , the plurality of radiation pattern lines 130 may be formed in a line pattern extending in a horizontal direction, and may be formed in a line pattern extending in a vertical direction by intersecting the plurality of radiation pattern lines 130 . It may further include at least one cross radiation pattern line 131 formed.

In the rear glass antenna 100 implemented as shown in FIG. 1, a feed signal is applied to the feed bus bar 110 located on one side, the ground bus bar 120 is electrically connected to the ground power supply, and the feed bus bar 110 ) and the ground bus bar 120 are connected by a plurality of radiation pattern lines 130, it can be regarded as operating as a kind of loop antenna.

However, due to the characteristics of the antenna, a new structured antenna having a more improved gain is always required.

Korean Patent Publication No. 10-2020-0113580 (published on October 7, 2020)

An object of the present invention is to provide a rear glass antenna for a vehicle with improved gain.

Another object of the present invention is to provide a rear glass antenna for a vehicle that can reduce the difference in reception performance according to frequency by reducing the difference in gain in the entire required frequency band by having an antenna that receives power feed signals directly and an antenna that receives signals through coupling. is providing

A vehicle rear glass antenna according to an embodiment of the present invention for achieving the above object includes: a first antenna unit formed at a predetermined position on the vehicle rear glass to receive a power supply signal and to be connected to a ground power source; and formed at an upper side or a lower side of the first antenna unit in the vehicle rear glass at a predetermined interval, and coupled with the first antenna unit to apply the feed signal and the ground power. The receiving second antenna unit include

The first antenna unit is formed in a pattern extending in a vertical direction from one side of the rear glass and includes a power supply bus bar receiving the power supply signal; a ground bus bar formed in a pattern extending in a vertical direction from the other side of the rear glass and connected to the ground power source; and a plurality of first radiation pattern lines formed in a predetermined pattern, both ends of which are connected to the power supply bus bar and the ground bus bar.

The second antenna unit is spaced apart from the power supply bus bar by a predetermined distance and formed in a pattern in the direction in which the power supply bus bar extends, and is coupled with the power supply bus bar to receive the power supply signal. A first coupling bus bar; a second coupling bus bar spaced apart from the ground bus bar by a predetermined interval, formed in a pattern in a direction in which the ground bus bar extends, and coupled with the ground bus bar to receive the ground power supply; and a plurality of second radiation pattern lines formed in a predetermined pattern having both ends connected to the first coupling bus bar and the second coupling bus bar.

The power supply bus bar and the ground bus bar may have areas protruding in a predetermined pattern in directions of the first and second coupling bus bars.

The first and second coupling bus bars may have grooves having a pattern corresponding to protruding regions of the power supply bus bar and the ground bus bar.

Therefore, the rear glass antenna for a vehicle according to an embodiment of the present invention has directions extending from each of the power supply bus and the ground bus as well as the first antenna unit in which a plurality of first radiation pattern lines connecting between the power supply bus bar and the ground bus bar are formed. Including a second antenna unit in which a plurality of second radiation pattern lines are formed connecting the first and second coupling bars formed to be spaced apart so as to be coupled to each other, the second antenna unit and the first antenna unit coupling method As the feed signal is applied and has radiation characteristics different from those of the first antenna unit, the gain of the rear glass antenna can be improved in all bands of required frequencies, and the difference in reception performance according to frequency can be reduced by reducing the difference in gain in the entire band. can reduce

1 shows an example of a conventional rear glass antenna.
2 shows a rear glass antenna according to an embodiment of the present invention.
FIG. 3 shows an implementation example in which the rear glass antenna of FIG. 2 is formed on the rear glass of a vehicle.
4 shows an example of a coupling implementation structure between each of the power supply bus bar and the ground bus bar and first and second coupling bars.
5 shows simulation results of the performance of the rear glass antenna according to the present invention.

In order to fully understand the present invention and the advantages in operation of the present invention and the object achieved by the practice of the present invention, reference should be made to the accompanying drawings illustrating preferred embodiments of the present invention and the contents described in the accompanying drawings.

Hereinafter, the present invention will be described in detail by describing preferred embodiments of the present invention with reference to the accompanying drawings. However, the present invention can be implemented in many different forms, and is not limited to the described embodiments. And, in order to clearly describe the present invention, parts irrelevant to the description are omitted, and the same reference numerals in the drawings indicate the same members.

Throughout the specification, when a certain component is said to "include", it means that it may further include other components, not excluding other components unless otherwise stated. In addition, terms such as "... unit", "... unit", "module", and "block" described in the specification mean a unit that processes at least one function or operation, which is hardware, software, or hardware. And it can be implemented as a combination of software.

2 shows a rear glass antenna according to an embodiment of the present invention, and FIG. 3 shows an implementation example in which the rear glass antenna of FIG. 2 is formed on a rear glass of a vehicle.

In FIGS. 2 and 3 , as in FIG. 1 , a rear glass antenna using a hot wire pattern as an antenna is shown as an example. 2 and 3, the rear glass antenna according to the present invention, unlike the conventional rear glass antenna 100 shown in FIG. It is configured to include the antenna unit 300.

The first antenna unit 200 may be formed above or below the rear glass, and the second antenna unit 200 may be formed under or above the rear glass according to the position where the first antenna unit 200 is formed. It may be formed parallel to the unit 200.

Here, as an example, it is assumed that the first antenna unit 200 is formed on the upper part of the vehicle rear glass and the second antenna unit 300 is formed on the lower part, but the first antenna unit 200 is formed on the lower part It is okay even if the second antenna unit 300 is formed on the upper part.

The first antenna unit 200 is formed between the power supply bus bar 210 formed on one side of the rear glass and the ground bus bar 220 formed on the other side, and between the power supply bus bar 210 and the ground bus bar 220. It includes a plurality of first radiation pattern lines 230 connected to. In addition, the plurality of first radiation pattern lines 230 may be formed as a line pattern extending in a horizontal direction, and at least one first radiation pattern line may be formed as a line pattern extending in a vertical direction by crossing the plurality of first radiation pattern lines 230. One cross radiation pattern line 231 may be further included.

2 and 3 show that the power supply bus bar 210 is formed on the right side and the ground bus bar 220 is formed on the left side, but the positions where the power supply bus bar 210 and the ground bus bar 220 are formed are can change with each other. In addition, although it is shown here that the plurality of first radiation pattern lines 230 are formed parallel to each other in the horizontal direction, in some cases, the plurality of first radiation pattern lines 230 are connected to the power supply bus bar 210 and the ground bus. It may be formed in a predetermined line pattern instead of a straight line pattern connected between the bars 220 .

Here, the power supply bus bar 210, the ground bus bar 220, the plurality of first radiation pattern lines 230, and at least one first crossing radiation pattern line 231 may all be implemented as conductors of a predetermined pattern. .

That is, the first antenna unit 200 basically has the same structure as the existing rear glass antenna 100 shown in FIG. 220 is electrically connected to the ground power source, and since the feed bus bar 210 and the ground bus bar 220 are connected by a plurality of first radiation pattern lines 230, it can operate as a kind of loop antenna. there is.

Meanwhile, the second antenna unit 300 includes first and second coupling bus bars 310 and 320 formed by being spaced apart by a predetermined interval in a direction extending from the power supply bus bar 210 and the ground bus bar 220 and a plurality of second radiation pattern lines 330 connected between the first and second coupling bus bars 310 and 320.

At this time, the first coupling bus bar 310 and the power supply bus bar 210 and the second coupling bus bar 320 and the ground bus bar 220 are spaced apart so as to be coupled to each other. Also, the plurality of second radiation pattern lines 330 may be formed as a line pattern extending in a horizontal direction like the plurality of first radiation pattern lines 230, and intersect with the plurality of second radiation pattern lines 330. At least one second cross radiation pattern line 331 may be further formed as a line pattern extending in the vertical direction.

Here, as an example, although the plurality of second radiation pattern lines 330 are illustrated as being implemented in the same pattern as the plurality of first radiation pattern lines 230, the plurality of second radiation pattern lines 330 are a plurality of first radiation pattern lines 330. It may be implemented in a pattern different from that of the pattern line 230 . In addition, the second cross radiation pattern line 331 may or may not be formed regardless of the presence or absence of the first cross radiation pattern line 231, and may be formed in a pattern different from that of the first cross radiation pattern line 231. .

That is, the second antenna unit 300 can be regarded as an antenna having the same configuration as the first antenna unit 200 and being spaced apart by a predetermined interval. However, the first and second coupling bus bars 310 and 320 of the second antenna unit 300 do not receive a power supply signal or are connected to a ground power source. Instead, each of the first and second coupling bus bars 310 and 320 is coupled with the spaced power supply bus bar 210 and the ground bus bar 220 to receive a power supply signal. That is, the first coupling bus bar 310 is coupled with the power supply bus bar 210 to receive a power supply signal, and the second coupling bus bar 320 is coupled with the ground bus bar 220 to provide ground power and Connected.

Although the second antenna unit 300 has a structure similar to that of the first antenna unit 200 and operates by receiving a feed signal to the first antenna unit 200 in a coupling method, the second antenna unit 300 Since it is formed apart from the first antenna unit 200, it may exhibit different characteristics from those of the first antenna unit 200. Accordingly, the rear glass antenna of the present invention including the first and second antenna units 200 and 300 also exhibits different characteristics compared to the conventional rear glass antenna.

The rear glass antenna according to this embodiment may be formed by being inserted between laminated glass layers of the rear glass or by printing a conductor line on one surface of the rear glass.

4 shows an example of a coupling implementation structure between each of the power supply bus bar and the ground bus bar and first and second coupling bars.

In FIG. 2, the first coupling bus bar 310 is coupled with the power supply bus bar 210 to receive a power supply signal, and the second coupling bus bar 320 is coupled with the ground bus bar 220 explained.

At this time, since the power supply bus bar 210 and the ground bus bar 220 are disposed on the upper side and the first and second coupling bus bars 310 are formed on the lower side, the lower end of the power supply bus bar 210 adjacent to each other and the second Coupling is performed at the upper end of the first coupling bus bar 310, and coupling is performed between the lower end of the ground bus bar 220 and the upper end of the second coupling bus bar 320.

However, when the lower ends of the power supply bus bar 210 and the ground bus bar 220 adjacent to each other and the upper ends of the first and second coupling bus bars 310 and 320 are formed parallel to each other, as shown in FIG. 2, Coupling may not be performed smoothly due to the small size of the coupling region where coupling is performed.

Accordingly, various patterns may be formed to increase coupling on surfaces positioned adjacent to each other in the power supply bus bar 210, the ground bus bar 220, and the first and second coupling bus bars 310 and 320. For example, in FIG. 4, square patterns 211 having predetermined widths and lengths are formed at the lower ends of the power supply bus bar 210 and the ground bus bar 220 so as to protrude downward. Correspondingly, the first and second At the upper ends of the two coupling bus bars 310 and 320, square grooves 311 are formed in a downward direction corresponding to the square patterns protruding from the power supply bus bar 210 and the ground bus bar 220. In this case, as shown in FIG. 2, the lower ends of the power supply bus bar 210 and the ground bus bar 220 and the upper ends of the first and second coupling bus bars 310 and 320 are formed parallel to each other. As the length of the regions formed adjacent to each other increases by the length of both sides of the square pattern, coupling can be more easily performed.

Here, the length and width of the square pattern and the square groove may be variously adjusted. In addition, here, as an example, a protruding pattern is formed at the lower ends of the power supply bus bar 210 and the ground bus bar 220, and grooves are formed at the upper ends of the first and second coupling bus bars 310 and 320. However, a protruding pattern may be formed on the upper ends of the first and second coupling bus bars 310 and 320, and grooves may be formed on the lower ends of the power supply bus bar 210 and the ground bus bar 220. In addition, a groove corresponding to the square pattern may be formed on one side instead of the center, or a pattern other than the square pattern and the square groove may be formed. That is, various patterns can be formed that can increase the length of adjacent sides where coupling is made between the power supply bus bar 210 and the ground bus bar 220 and the first and second coupling bus bars 310 and 320. there is.

5 shows simulation results of the performance of the rear glass antenna according to the present invention.

5 shows simulation results for the case where the rear glass antenna according to the present invention is used as an FM radio antenna, by comparing the antenna gain in the 88 to 108 MHz frequency band with that of the conventional rear glass antenna.

As shown in FIG. 5 , it can be seen that the gain of the rear glass antenna according to the present invention is improved in all bands of FM radio frequencies. In the case of the conventional rear glass antenna, there are limitations according to the characteristics of the loop antenna due to the loop antenna structure, whereas in the present invention, the first antenna unit 200 is composed of the same loop antenna, but the second antenna unit ( 300) is because the signal is not directly fed and the signal is transferred to the coupling in the floating state, so that it may have radiation characteristics different from those of the first antenna unit 200. In addition, it can be seen that the reception performance difference according to frequency is reduced by reducing the gain difference for each frequency in the entire FM frequency band.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is only exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom.

Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

100: rear glass antenna 110: power supply bus bar
120: ground bus bar 130: radiation pattern line
131: cross radiation pattern line 200: first antenna unit
210: power supply bus bar 220: ground bus bar
230 first radiation pattern line 231 first cross radiation pattern line
300: second antenna unit 310: first coupling bus bar
320: second coupling bus bar 330: second radiation pattern line
331: second cross radiation pattern line

Claims (5)

a first antenna unit formed at a predetermined location on the rear glass of the vehicle to receive a power supply signal and connected to a ground power source; and
formed at an upper side or a lower side of the first antenna unit in the vehicle rear glass at a predetermined interval and coupled with the first antenna unit to receive the feed signal and the ground power Including a second antenna unit,
The first antenna unit
a power supply bus bar formed in a pattern extending in a vertical direction from one side of the rear glass and receiving the power supply signal;
a ground bus bar formed in a pattern extending in a vertical direction from the other side of the rear glass and connected to the ground power source; and
Includes a plurality of first radiation pattern lines formed in a predetermined pattern, both ends of which are connected to the power supply bus bar and the ground bus bar;
The second antenna unit
A first coupling bus bar spaced apart from the power supply bus bar by a predetermined interval, formed in a pattern in a direction in which the power supply bus bar extends, and coupled with the power supply bus bar to receive the power supply signal;
a second coupling bus bar spaced apart from the ground bus bar by a predetermined interval, formed in a pattern in a direction in which the ground bus bar extends, and coupled with the ground bus bar to receive the ground power supply; and
A vehicle rear glass antenna comprising a plurality of second radiation pattern lines formed in a predetermined pattern, both ends of which are connected to the first coupling bus bar and the second coupling bus bar.
delete delete The method of claim 1, wherein the power supply bus bar and the ground bus bar
A rear glass antenna for a vehicle, wherein protruding regions are formed in a predetermined pattern in directions of the first and second coupling bus bars. The method of claim 4, wherein the first and second coupling bus bars
A rear glass antenna for a vehicle, wherein a pattern of grooves corresponding to protruding regions of the power supply bus bar and the ground bus bar is formed.

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