KR20220001878U - Vehicle rear glass antenna - Google Patents

Abstract

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

Description

Vehicle rear glass antenna

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

In recent years, various types of communication devices are being installed in vehicles as various types of smart functions are required as well as multi-functional and high-performance vehicles. As such, as the number of in-vehicle communication devices increases, a plurality of antennas for this purpose are also required.

In current vehicles, a heating wire pattern is formed on the rear glass to prevent fogging or fogging due to temperature or humidity. Accordingly, in many vehicles, an antenna is formed on the rear glass of the vehicle along with such a hot wire pattern, or the hot snow 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 , a conventional rear glass antenna 100 includes a feed bus bar 110 formed on one side of the rear glass, a ground bus bar 120 formed on the other side, and a feed bus bar 110 and a ground bus. A plurality of radiation pattern lines 130 connected between the bars 120 may be included. Here, the plurality of radiation pattern lines 130 may be formed in a line pattern extending in the horizontal direction as shown in FIG. 1 , and may be formed as a line pattern extending in the vertical direction by crossing 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 a feed bus bar 110 located on one side, and the ground bus bar 120 is electrically connected to a ground power source, and the feed bus bar 110 is electrically connected to a ground power source. ) and the ground bus bar 120 are connected by a plurality of radiation pattern lines 130 , it can be seen that they operate as a kind of loop antenna.

However, due to the characteristics of the antenna, there is always a demand for an antenna having a new structure having a further improved gain.

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

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

Another object of the present invention is a vehicle rear glass antenna capable of reducing a difference in reception performance depending on frequency by reducing a gain difference in the entire frequency band required by having an antenna that receives a feed signal directly and an antenna that is applied through coupling is to provide

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 feed signal and connected to a ground power; and the first antenna on the upper or lower side of the vehicle rear glass and spaced apart from the first antenna by a predetermined distance, and is coupled to the first antenna to apply the feed signal and the ground power. receiving the second antenna include

a feeding bus bar formed in a pattern extending in the vertical direction from one side of the rear glass and receiving the feeding signal; a ground bus bar formed in a pattern extending in the vertical direction from the other side of the rear glass and connected to the ground power supply; and a plurality of first radiation pattern lines having both ends connected to the feed bus bar and the ground bus bar in a predetermined pattern.

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

The feed bus bar and the ground bus bar may have regions protruding in a predetermined pattern in the direction of the first and second coupling bus bars.

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

Accordingly, in the rear glass antenna for a vehicle according to an embodiment of the present invention, the direction extending from each of the feeding bus and the ground bus as well as the first antenna part in which a plurality of first radiation pattern lines connecting between the feeding bus bar and the grounding bus bar are formed Including a second antenna unit in which a plurality of second radiation pattern lines connecting between the first and second coupling bars formed to be spaced apart to be coupled to each other are formed, the second antenna unit is coupled to the first antenna unit in a coupling method As it has different radiation characteristics from the first antenna unit by receiving a feed signal from can be reduced.

1 shows an example of a conventional rear glass antenna.
2 shows a rear glass antenna according to an embodiment of the present invention.
3 shows an embodiment 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 a feed bus bar and a ground bus bar, respectively, and first and second coupling bars.
5 shows a simulation result of the performance of the rear glass antenna according to the present invention.

In order to fully understand the present invention, the operational advantages of the present invention, and the object achieved by the implementation 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 may be implemented in several 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 part "includes" a certain component, it does not exclude other components unless otherwise stated, meaning that other components may be further included. In addition, terms such as "... unit", "... group", "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 a combination of software.

2 shows a rear glass antenna according to an embodiment of the present invention, and FIG. 3 shows an embodiment in which the rear glass antenna of FIG. 2 is formed on the 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 illustrated as an example. 2 and 3, the rear glass antenna according to the present invention does not have a single antenna configuration, unlike the conventional rear glass antenna 100 shown in FIG. It is configured to include an 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 disposed on the lower or upper side of the rear glass depending on the position where the first antenna unit 200 is formed. It may be formed in parallel with the part 200 .

Here, as an example, it is assumed that the first antenna unit 200 is formed on the upper portion of the vehicle rear glass and the second antenna unit 300 is formed on the lower portion, but the first antenna unit 200 is formed on the lower portion and The second antenna unit 300 may be formed on the upper portion.

The first antenna unit 200 includes a feed bus bar 210 formed on one side of the upper portion of the rear glass, a ground bus bar 220 formed on the other side, and between the feed 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 in a line pattern extending in the horizontal direction, and at least one second radiation pattern line intersecting the plurality of first radiation pattern lines 230 and extending in the vertical direction. One cross radiation pattern line 231 may be further included.

2 and 3 show that the feed bus bar 210 is formed on the right side and the ground bus bar 220 is formed on the left side, but the position where the feed bus bar 210 and the ground bus bar 220 are formed is can be changed to each other. In addition, although it is illustrated here that the plurality of first radiation pattern lines 230 are formed in parallel in the horizontal direction, in some cases, the plurality of first radiation pattern lines 230 are connected to the feed 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 feeding bus bar 210 , the grounding bus bar 220 , the plurality of first radiation pattern lines 230 , and the at least one first cross radiation pattern line 231 may all be implemented with a conductor having a predetermined pattern. .

That is, the first antenna unit 200 has basically the same structure as the conventional rear glass antenna 100 shown in FIG. 1 , and a feed signal is applied to the feed bus bar 210 located on one side, and the ground bus bar 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. have.

Meanwhile, the second antenna unit 300 includes first and second coupling bus bars 310 and 320 formed to be spaced apart by a predetermined distance in a direction extending from the feeding bus bar 210 and the grounding 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 , the feeding bus bar 210 , and the second coupling bus bar 320 and the grounding bus bar 220 are spaced apart so as to be coupled to each other. In addition, the plurality of second radiation pattern lines 330 may be formed in a line pattern extending in a horizontal direction like the plurality of first radiation pattern lines 230 , and intersect 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, 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 , but the plurality of second radiation pattern lines 330 are the plurality of first radiation pattern lines 330 . It may be implemented in a pattern different from 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 viewed as an antenna that has the same configuration as the first antenna unit 200 and is formed to be spaced apart by a predetermined interval. However, the first and second coupling bus bars 310 and 320 of the second antenna unit 300 are not applied with a feed signal or connected to a ground power source. Instead, each of the first and second coupling bus bars 310 and 320 is coupled to the spaced apart feed bus bar 210 and the ground bus bar 220 to receive a feed signal. That is, the first coupling bus bar 310 is coupled to the feeding bus bar 210 to receive a feeding signal, and the second coupling bus bar 320 is coupled to the grounding 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 from the first antenna unit 200 in a coupling method, the second antenna unit 300 is Since it is formed to be spaced apart from the first antenna unit 200 , characteristics different from those of the first antenna unit 200 may be exhibited. Accordingly, the rear glass antenna of the present invention including the first and second antenna units 200 and 300 also exhibits different characteristics than the conventional rear glass antenna.

The rear glass antenna according to the present embodiment may be formed by being inserted between the 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 a feed bus bar and a ground bus bar, respectively, and first and second coupling bars.

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

At this time, since the feeding bus bar 210 and the grounding 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 feeding bus bar 210 adjacent to each other and the second coupling bus bar 310 are disposed on the lower side. The coupling is made at the upper end of the first coupling bus bar 310 , and the coupling is made between the lower end of the ground bus bar 220 and the upper end of the second coupling bus bar 320 .

However, as shown in FIG. 2 , when the lower ends of the adjacent feed 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, Since the size of the coupling region where the coupling is made is small, the coupling may not be performed smoothly.

Accordingly, the feed bus bar 210 , the ground bus bar 220 , and the first and second coupling bus bars 310 and 320 may be formed in various patterns so that coupling is increased on surfaces positioned adjacent to each other. For example, in FIG. 4 , a rectangular pattern 211 having a predetermined width and length is formed at the lower end of the feeding bus bar 210 and the grounding bus bar 220 to protrude downward, and correspondingly, the first and second 2 In the upper end of the coupling bus bars 310 and 320 , a rectangular groove 311 in a downward direction is formed corresponding to the rectangular pattern protruding from the feeding bus bar 210 and the grounding bus bar 220 . In this case, as shown in FIG. 2 , the lower ends of the feeding bus bar 210 and the grounding 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 by the length of both sides of the square pattern increases, the coupling may be more easily performed.

Here, the length and width of the square pattern and the square groove may be variously adjusted. Also, here, as an example, it is described that a pattern protruding from the lower ends of the feeding bus bar 210 and the grounding bus bar 220 is formed, and a groove is formed at the upper ends of the first and second coupling bus bars 310 and 320 . However, a pattern protruding from the upper ends of the first and second coupling bus bars 310 and 320 may be formed, and grooves may be formed at the lower ends of the feeding bus bar 210 and the grounding bus bar 220 . In addition, the groove corresponding to the square pattern may be formed on one side rather than the center, and a pattern other than the square pattern and the square groove may be formed. That is, various patterns in which the length of adjacent sides of which coupling is made between the feeding bus bar 210 and the grounding bus bar 220 and the first and second coupling bus bars 310 and 320 can be increased can be formed. have.

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

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

As shown in FIG. 5 , it can be seen that the rear glass antenna according to the present invention has improved gains in all bands of the FM radio frequency. This is because the conventional rear glass antenna has a loop antenna structure, so there is a limit according to the characteristics of the loop antenna, whereas in the present invention, the first antenna unit 200 is configured as a loop antenna in the same way, but the second antenna unit ( This is because the signal 300 may have different radiation characteristics from that of the first antenna unit 200 because the signal is not directly fed and the signal is transmitted through coupling in the floating state. In addition, it can be seen that the difference in reception performance according to frequency is reduced by reducing the difference in gain for each frequency in the entire FM frequency band.

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

Accordingly, 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: feed bus bar
120: ground bus bar 130: radiation pattern line
131: cross radiation pattern line 200: first antenna unit
210: feeding bus bar 220: grounding 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 intersecting radiation pattern line

Claims (5)

a first antenna unit formed at a predetermined position on the vehicle rear glass to receive a power supply signal and connected to a ground power source; and
The vehicle rear glass is formed to be spaced apart from the first antenna at a predetermined distance on the upper side or the lower side of the first antenna unit, and is coupled to the first antenna unit to receive the feed signal and the ground power. A rear glass antenna for a vehicle including a second antenna unit. The method of claim 1, wherein the first antenna unit
a feeding bus bar formed in a pattern extending in the vertical direction from one side of the rear glass and receiving the feeding signal;
a ground bus bar formed in a pattern extending in the vertical direction from the other side of the rear glass and connected to the ground power supply; and
A rear glass antenna for a vehicle comprising a plurality of first radiation pattern lines having both ends connected to the feed bus bar and the ground bus bar in a predetermined pattern. The method of claim 2, wherein the second antenna unit
a first coupling bus bar spaced apart from the feed bus bar by a predetermined interval, formed in a pattern in a direction in which the feed bus bar extends, coupled to the feed bus bar to receive the feed 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, coupled to the ground bus bar to receive the ground power; and
A rear glass antenna for a vehicle comprising a plurality of second radiation pattern lines having both ends connected to the first coupling bus bar and the second coupling bus bar in a predetermined pattern. The method of claim 3, wherein the feed bus bar and the ground bus bar are
A rear glass antenna for a vehicle in which an area protruding in a predetermined pattern in a direction of the first and second coupling bus bars is formed. 5. The method of claim 4, wherein the first and second coupling bus bars are
A rear glass antenna for a vehicle in which a groove having a pattern corresponding to the protruding regions of the feed bus bar and the ground bus bar is formed.

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