JP2003142913A - Glass antenna for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a glass antenna for a vehicle which has higher reception gain to, specially, FM radio broadcast waves and AM radio broadcasting waves. SOLUTION: The vehicle glass antenna which is constituted by providing a plurality of heating conductive wires and an antifogging heating wire having busbars connected to both the ends of the heating conductive wires to a vehicle rear windshield is characterized in that a 1st element which is provided with a feed point in the upper margin part of the antifogging heating wire and so connected as to have at least a 1st horizontal wire which can be capacitively coupled with the top wire among the heating conductive wires from the feed point directly or through a lead-out line and a 2nd element composed of a vertical wire which is so provided as to branch off at a position nearby the feed point of the 1st element and cross and connect with part of a plurality of heating conductive wires on the feed point side are disposed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an AM radio broadcast wave, an FM radio broadcast wave provided on a rear window glass of an automobile,
The present invention relates to a glass antenna for receiving TV broadcast waves and the like, and particularly to a glass antenna suitable for receiving FM radio broadcast waves and AM radio broadcast waves.

[0002]

2. Description of the Related Art Conventionally, when a glass antenna is provided on a window glass of a vehicle or the like, if it is provided on a front window glass on the driver's side, it hinders the driver's view, so that it is provided on the rear window glass. Antennas are commonly used.

In recent years, glass antennas for FM radio broadcast waves and glass antennas for AM radio broadcast waves are
Many applications have been filed, and the upper margin of the conductive wire for heating of the rear window glass has a relatively large space and the area is high, so it is possible to increase the reception gain relatively easily. Most of the glass antennas provided in the section have been put to practical use.

It is also possible to use a heating conductive wire as an antenna by providing a vertical conductive wire connected orthogonally to the heating conductive wire composed of a plurality of substantially horizontal wires. It was done.

For example, Japanese Unexamined Patent Publication No. 56-42401, in which a part of the antenna provided in the upper margin of the heating conductive wire is connected orthogonally to the heating conductive wire consisting of this substantially horizontal wire, and the like. As an antenna provided with a vertical filament extending outside the bus bar of the heating filament, the applicant of the present invention also shortly and horizontally from the tip of the filament extending vertically along the bus bar to the upper margin of the heating filament. A glass antenna composed of an elongated wire is disclosed in JP-A-62-123803 and JP-A-3-850.
I have applied for it as No. 04.

[0006] These antennas disclosed in the above-mentioned Japanese Patent Laid-Open No. 56-42401 provide a certain degree of receiving gain for an AM radio broadcast wave in spite of occupying almost the upper margin of the heating conductive wire. However, it is difficult to obtain a sufficient reception gain for FM radio broadcast waves, and the antenna disclosed in JP-A-62-123803 has a small occupied area, but in this case as well. A
It has been difficult to obtain high gain for radio waves over a very wide band from M radio broadcast waves to TV broadcast waves.

Therefore, an antenna provided in an area smaller than the area of a conventional glass antenna, particularly FM
As a glass antenna with improved reception gain for radio broadcast waves and AM radio broadcast waves, a plurality of heating conductive wires as shown in Japanese Patent Application Laid-Open No. 10-303627 by the present applicant and the outside of the heating conductive wires. In a vehicle glass antenna provided on a rear window glass for a vehicle in which a bus bar connected to the vehicle is installed, a first vertical line extending vertically outside the one bus bar from a power supply unit provided at a lower corner and the power supply. At least a horizontal strip extending horizontally from the bottom portion of the conductive strip for heating and a second vertical strip connected to the tip of the horizontal strip to intersect the heating strip at a right angle and extend upward. Thus disclosed glass antenna.

[0008]

However, the glass antenna for a vehicle disclosed in Japanese Unexamined Patent Publication No. 10-303627 has a high gain antenna reception for the domestic FM radio broadcast wave band in the frequency band of 76 to 90 MHz. Although the performance is obtained, domestic FM radio broadcasting waves in the frequency band of 76 to 108 MHz to television broadcasting waves VHF
It has been difficult to obtain high-gain antenna reception performance for a wide band of frequencies up to the LOW band (FM radio broadcast wave band overseas).

Further, even if it is necessary to provide the antenna element outside the bus bar, there is a case where the antenna element cannot be provided because the space cannot be secured at the position depending on the vehicle type.

[0010]

The present invention has been made in view of the above points, and can be provided not only in an area smaller than the area of a conventional glass antenna, but also from an FM radio broadcast wave to a television. Broadcast wave VHF-
Provide a glass antenna that can obtain high-gain antenna reception performance over a wide frequency band up to the LOW band (FM radio broadcast wave band outside Japan) and does not require a space for installing an antenna element outside the bus bar. To aim.

That is, the present invention provides a vehicle glass antenna in which a plurality of heating conductive wires and anti-fogging heating wires in which bus bars are connected to both ends of the heating conductive wires are provided on a rear window glass for a vehicle. , A feed point is provided in an upper margin of the anti-fogging heating wire, and at least a first horizontal wire capable of capacitive coupling with the uppermost wire of the conductive wire for heating is provided from the power feeding point directly or through a lead wire. So as to cross-connect with a part of a plurality of heating conductive wires on the feeding point side directly from the feeding point, or branched from a position near the feeding point with the first element. It is a glass antenna for a vehicle, characterized in that it is composed of a second element in which a vertical filament arranged in the above is extended.

[0012] Alternatively, in the present invention, the first element includes a second horizontal line extending from the feeding point along the upper side of the opening window frame and a first horizontal line adjacent to the uppermost line of the heating conductive line. The above glass antenna for vehicles is characterized in that and are connected by a vertical line.

Alternatively, the present invention provides a vehicle glass antenna in which a plurality of heating conductive wires and anti-fogging heating wires having bus bars connected to both ends of the heating conductive wires are provided on a rear window glass for a vehicle. In, a feeding point is provided in the lower margin of the anti-fogging heating wire, and at least a first horizontal wire capable of being capacitively coupled with the bottom wire of the heating wire for heating is provided from the power feeding point directly or through a lead wire. Likewise connected to the first element, or directly from the feeding point, or branched from the vicinity of the feeding point by the first element and cross-connected to a part of the plurality of heating conductive wires on the feeding point side. A glass antenna for a vehicle, characterized in that it is composed of a second element in which the vertical filaments thus arranged are extended.

Alternatively, in the present invention, the first element includes a second horizontal line extending from the feeding point along the lower side of the opening window frame and a first horizontal line adjacent to the bottom line of the heating conductive line. The above-mentioned glass antenna for vehicles is characterized in that it is connected to a strip by a vertical strip.

Alternatively, the present invention is characterized by further providing at least one vertical filament which intersects with a part or all of the plurality of heating conductive filaments of the anti-fogging heating filament at right angles. It is the glass antenna for the vehicle described above.

Alternatively, in the present invention, the horizontal length of the first element capacitively coupled to the heating conductive wire is approximately ¼ or more of the length of the adjacent heating conductive wire. The glass antenna for a vehicle as described above, characterized in that.

Alternatively, in the present invention, the length of the vertical line of the second element along the bus bar is about 1/4 or more of the length of the bus bar. It is a glass antenna.

Alternatively, the present invention is the above glass antenna for a vehicle, characterized in that the distance between the vertical line of the second element and the bus bar is 5 mm or more.

Alternatively, the present invention is the above glass antenna for a vehicle, characterized in that a direct current power source is connected to the bus bar through at least a choke coil.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION The antenna wire of the present invention has a structure as described above, that is, a feeding point in which two elements of a first element and a second element are provided near a corner of a heating wire. It consists of parallel connections.

As for the position of the feeding point, as shown in FIG. 1, it is provided between the upper end and the corner of the bus bar provided at both ends of the anti-fogging heating wire provided on the rear window glass of the vehicle or in the vicinity thereof. However, as shown in FIG. 2, a position displaced toward the center along the upper side opening from the corner is also included in the range.

Regarding the position of the feeding point, the position between the upper end of the bus bar and the corner or in the vicinity thereof is preferable.
The same is true at the lower end of the inverted bus bar and the position between or near the corner.

The first element is provided in the upper margin of the anti-fogging heating wire, and is capable of capacitively coupling to the uppermost conductive wire of the anti-fogging heating wire. It is desirable that the distance between the horizontal wire and the uppermost wire of the conductive wire for heating is 1 mm to 10 mm.

Also, the first element may be provided in the lower blank portion and at least the first horizontal filament capable of capacitive coupling to the conductive filament on the lowermost side of the anti-fogging heating filament. The same effect can be obtained.

Further, it is desirable that the length of the horizontal filament of the first element that is capacitively coupled with the heating conductive filament is approximately ¼ or more of the length of the heating conductive filament that is capacitively coupled. However, it is not necessarily about 1/4 or more.

Further, the first element is provided with a second horizontal filament extending along the upper window or the lower edge of the opening window frame so as to be capacitively coupled from the feeding point, and the tip of the second horizontal filament is provided. Alternatively, a vertical filament may be connected or may be branched from the middle, and the vertical filament may be connected to any position of the first horizontal filament.

Alternatively, as the first element, the first element capable of being capacitively coupled to the horizontal conductive wire of the anti-fogging heating wire.
Another horizontal filament and a vertical filament may be combined and connected between the horizontal filament and the second horizontal filament arranged so as to be capacitively coupled near the upper side or the lower edge of the opening window frame. .

The second element is branched from the feeding point or a position near the feeding point of the first element and cross-connected to a part of the plurality of heating conductive wires inside the bus bar. The vertical filaments arranged in this way are extended.

The distance between the vertical line of the second element and the bus bar is set to 5 mm or more, and it is preferable if the distance is such that it does not intersect with the first horizontal line of the first element, because the influence of each high frequency becomes small. .

The length of the vertical line of the second element inside the bus bar is preferably about 1/4 or more of the length of the bus bar, but not necessarily about 1/4 or more. Absent.

Further, for each of the pair of left and right bus bars,
If a DC power supply is connected via at least a choke coil, it is possible to reduce the current leaking to the metal body when receiving an AM radio broadcast wave. Furthermore, if a high frequency coil is inserted between the bus bar and the choke coil, FM radio broadcast wave reception The current that sometimes leaks to the metal body can be reduced.

At least one vertical filament that intersects with a part or all of the plurality of heating conductive filaments of the anti-fogging heating filament at right angles is provided because the vertical filament is an anti-fogging heating filament. Instead, it is for improving the reception gain by using the anti-fogging heating wire as an antenna.

Thus, the first element of the first element
By the capacitive coupling of the horizontal wire of the above with the uppermost or lowermost wire of the conductive wire for heating, and by connecting the vertical wire of the second element to the inside of the bus bar of the antifogging heating wire, Since the first element, the second element and the heating conductive wire form a high frequency loop, it is possible to efficiently receive the radio waves carried by the heating conductive wire.

In particular, the reception gain for FM radio broadcast waves and AM radio broadcast waves is increased to a level exceeding the level of the conventional glass antenna and even exceeding the whip antenna.

In order for the antenna of the present invention to form a loop shape, the distance between the first horizontal filament of the first element and the conductive filament for heating is 1 mm to 10 mm, and the length of the first horizontal filament. Approximately ¼ or more of the length of the heating conductive wire, and the distance between the vertical wire of the second element and the inside of the bus bar is 5
It is necessary that the length is not less than mm and does not intersect with the first horizontal filament of the first element, and the length of the vertical filament is approximately 1/4 or more of the length of the bus bar.

Regarding the auxiliary element, an auxiliary element which is not directly connected to the antenna of the main body but is connected to the conductive wire for heating or the bus bar and a vertical wire which is orthogonal to the conductive wire for heating and extends in connection therewith Since the element can change the reception frequency band, it is very effective depending on the vehicle type.

That is, the peak of the reception gain can be shifted.

The antenna of the present invention can be used alone, but the antenna of the present invention may be provided on the left and right sides, and other antennas provided on the rear window glass, and further provided on the front window glass. Of course, diversity reception may be performed in combination with an antenna, an antenna provided on a side window glass, a pole antenna such as a whip antenna, or the like.

[0039]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the drawings.

The glass antennas of the respective examples shown below are
In this example, the FM radio broadcast wave of 76 MHz to 108 MHz is tuned (adjusted to a length and an interval that optimize the reception gain).

EXAMPLE 1 As shown in FIG. 1, a plurality of substantially horizontal conductive heating wires 2 are connected to the inner surface of a glass sheet 1 mounted on a rear window glass for a vehicle and both ends thereof. Busbar 3, 3 '
And a first element 5 provided in the upper margin of the anti-fog heating wire, and a part of the plurality of heating conductive wires inside the left bus bar 3. A feeding point 1 in which each of the second elements 6 provided with vertical filaments arranged so as to cross-connect with is provided near the upper left corner.
It is connected to 0.

The first element 5 is a second horizontal filament extending from the feeding point 10 provided in the vicinity of the upper left corner of the anti-fogging heating filament to a substantially middle portion along the upper side of the window frame opening. 5b, a first horizontal filament 5a provided close to the uppermost line of the anti-fogging heating conductive filament 12, and a second horizontal filament 5
The tip of b was connected to the substantially middle portion of the first horizontal filament 5a by a vertical filament 5c.

The second element 6 is connected to the feeding point 10 by a vertical filament 6a provided near the inside of the left bus bar 3 so as to cross-connect with a part of the plurality of heating conductive filaments 2. .

In addition, all of the plurality of heating conductive wires 2 and
One vertical line 8 is provided which intersects at a substantially intermediate portion.

The size of the plate glass 1 is the upper side length A = 110.
0 mm, bottom side length B = 1350 mm, side side vertical length C =
It is 720 mm.

The length of each filament is as follows.

Length of the first horizontal filament 5a of the first element 5 = 1100mm Length of the second horizontal filament 5b = 520mm Length of the vertical filament 5c = 150mm First horizontal filament 5a and conductive for heating Distance between the uppermost line of the wire 2 = 5 mm Distance between the second horizontal wire 5b and the window frame opening = 5 mm Length of the vertical wire 6a of the second element 6 = 370 mm Between the vertical wire 6a and the bus bar 3 = 10 mm Length of the portion where the vertical filament 6a is juxtaposed with the bus bar 3 = 310 mm Distance between the bus bar 3 and the metal window frame closest to the bus bar 3 = 10 mm The glass antenna 4 having the above dimensions is electrically conductive paste. Was formed by printing and firing.

The plate glass thus obtained was attached to the rear window glass of an automobile, and the bus bars 3 on both sides were
A DC power supply circuit is connected to 3 '. High frequency coil 11,
One is through DC power source 13 through 11 and choke coil 12.
And the other is connected to ground.

With the DC power supply circuit connected, the antenna of the present invention allows horizontal polarization of the FM radio broadcast wave band of 76 MHz to 90 MHz and horizontal polarization of the FM radio broadcast wave band in the bands of 88 to 108 MHz such as North America and Europe. When the polarized wave is received and the gain difference when the reception gain of the whip antenna is set to 0 dB, it is +2.2 dB on average, respectively.
+1.9 dB, tuned from 76 MHz to 1
In the band of 08 MHz, it exceeds the reception gain of the whip antenna, which shows that it is a very good antenna.

The frequency characteristic showing the reception gain for each frequency at that time is as shown in FIG.
It can be seen that a high reception gain can be obtained in the wide band of 08 MHz.

Further, A of 500 KHz to 1800 KHz
When the reception performance of the M radio band was received and the reception performance was measured, the reception performance of the whip antenna was almost 3 dB higher in all bands, and it was a very good antenna for the AM radio broadcast wave band. It was

Embodiment 2 As shown in FIG. 2, the feeding point position is moved slightly toward the center from the upper corner portion, and the length of the first horizontal filament 5a of the first element is set to that of the heating conductive filament 2. 2 of the length of the top line
The length of the vertical bar 6a of the second element is about 1/3 of the length of the bus bar 3.

All the plurality of heating conductive wires 2 and two vertical wires 8 which intersect each other at right angles to the heating conductive wire 2 are divided into three parts. A vertical filament was extended from the uppermost portion toward the upper right corner, and an auxiliary element 7 was provided which was a horizontal filament along the upper edge of the window frame opening from its tip to a position near the center of the upper edge. Others are almost the same as in the first embodiment.

Auxiliary element 7 and vertical filaments 8, 8
It is effective to broaden the reception frequency by adjusting the position and the element length.

The dimensions of the plate glass 1 and the lengths of the filaments are almost the same as in Example 1, but the different parts will be described below.

The length of the first horizontal filament 5 a of the first element 5 = 735 mm The length of the vertical filament 6 a of the second element 6 = 250 mm In the portion where the vertical filament 6 a is juxtaposed with the bus bar 3. Length = 170 mm The plate glass thus obtained is mounted on the rear window glass of an automobile, and a DC power supply circuit is connected to the bus bars 3 and 3 ′ on both sides. One is connected to the DC power supply 13 via the choke coil 12, and the other is connected to the ground.

With the direct-current power supply circuit connected, the antenna of the present invention allows horizontal polarization of the FM radio broadcast wave band of 76 MHz to 90 MHz and horizontal polarization of the FM radio broadcast wave band in the bands of 88 to 108 MHz in North America, Europe and the United States. When the polarized wave is received and the gain difference when the reception gain of the whip antenna is set to 0 dB, it is +1.7 dB on average, respectively.
+2.8 dB, tuned from 76 MHz to 1
In the band of 08 MHz, it exceeds the reception gain of the whip antenna, which shows that it is a very good antenna.

Further, A of 500 KHz to 1800 KHz
When the reception performance of the M radio band was received and the reception performance was measured, the reception performance of the whip antenna was almost 3 dB higher in all bands, and it was a very good antenna for the AM radio broadcast wave band. It was

Embodiment 3 FIG. 3 shows an example in which the glass antennas 4 and 4'of the present invention are provided on the left and right to enable diversity reception.

The glass antenna 4 provided on the left side of the heating conductive wires 2, 2, ... Is provided with a feeding point 10 near the left corner.
Is provided, and as the first element 5, the first horizontal filament 5
The second horizontal filament 5b, which has a length of about 1/3 of the length of the uppermost conductor of the heating conductive filaments 2, 2, ..., And is horizontally extended from the feeding point 10 through the leader filament 5d. Also, the length of the upper side is approximately 1/3 of the opening side, and the middle portions of the first horizontal line 5a and the second horizontal line 5b are connected in a V shape by the vertical line 5c, and the second element is formed. As the vertical filaments 6a of 6, vertical filaments 6a provided along the inner side of the bus bar 3 so as to cross-connect with about 2/3 of the total number of conductive filaments for heating.
Was connected to the lead wire connected to the feeding point 10.

Further, the glass antenna 4'provided on the right side of the heating conductive wire 2, 2, ... Is provided with a feeding point 10 'near the right corner portion, and the first element 5'is provided with the first element 5'.
The length of the horizontal wire 5a 'of the conductive wire for heating 2, 2, ...
About 1/4 of the length of the uppermost line of the second horizontal line 5b 'provided horizontally from the feeding point 10' is also about 1/3 of the opening of the upper side.
About the first horizontal line 5a ′ and the second horizontal line 5b ′, the central end portions of the first horizontal line 5a ′ and the second horizontal line 5b ′ are connected by a vertical line 5c ′ to form a U-shape, and the second element 6 ′ serves as the bus bar 3 ′.
The vertical filament 6a 'provided so as to cross-connect with about 1/2 of the plurality of heating conductive filaments inside is connected to the lead-out filament 5d' connected to the feeding point 10 '.

Further, the plurality of heating conductive wires are divided into two groups, an upper side and a lower side.
Two vertical filaments 8 and 8 intersecting each other at a position that divides the heating conductive filament into approximately three equal parts are provided, and for the lower side group,
One vertical filament 8'which intersects the heating conductive filament at right angles to each other is provided and connected.

The vertical filaments 8, 8, 8'are useful for widening the receiving frequency.

The dimensions of the plate glass 1 are the same as in Example 1.

The plate glass thus obtained was attached to the rear window glass of an automobile, and the bus bars 3 on both sides were
A DC power supply circuit is connected to 3 '. Choke coil 12
One is connected to the DC power supply 13 via the other, and the other is connected to the ground.

With the DC power supply circuit connected, the antenna of the present invention allows horizontal polarization of the FM radio broadcast wave band of 76 MHz to 90 MHz and horizontal polarization of the FM radio broadcast wave band in the bands of 88 to 108 MHz such as North America and Europe. When the polarized light is received and the gain difference when the reception gain of the whip antenna is set to 0 dB, the glass antenna 4 has an average of +2.5 dB and +1.6 dB, and the glass antenna 4 ′ has an average of respectively. + 1.6dB, + 2.0d
B, tuned from 76MHz to 108MHz
Exceeds the reception gain of the whip antenna in the band
It turns out that it is a very good antenna.

Further, A of 500 KHz to 1800 KHz
When the reception performance of the M radio band was received and the reception performance was measured, the reception performance of the whip antenna was almost 3 dB higher in all bands, and it was a very good antenna for the AM radio broadcast wave band. It was

Example 4 In the example shown in FIG. 4, one bus bar 3 is provided on the left side of the vehicle rear window glass, and two bus bars 3 ', 3 "are provided on the right side of the rear window glass.
Is a U-shaped anti-fogging heating wire in which the heating conductive wires 2, 2, ...
The glass antenna 4 of the first embodiment is provided on the inner side and the upper side of the left side bus bar of Nos. 2, ... , 2, ... And the bus bars 3, 3 ', 3 "are provided in the vicinity thereof.

Further, a plurality of heating conductive wires 2, 2, ...
Is divided into two groups, an upper side and a lower side, and each of the groups is connected by providing vertical filaments 8 and 8 which intersect each other at a position where the heating electrically conductive filaments 2, 2, ... did.

The dimensions of the plate glass 1 are the same as in Example 1.

The plate glass 1 thus obtained was attached to the rear window glass of an automobile, and the bus bar 3 ',
A DC power supply circuit is connected to 3 ". High frequency coil 11,
One is through DC power source 13 through 11 and choke coil 12.
And the other is connected to ground.

As a result, with the antenna of the present invention, F
With respect to the reception gain in the M radio broadcast wave band, the same reception performance as that of the first embodiment was obtained.

[0073]

According to the present invention, the first element having the horizontal filament close to the anti-fogging heating filament is cross-connected with a part of the plurality of heating conductive filaments inside the bus bar. By skillfully combining the second element composed of the vertical filaments provided as described above, the reception gain for horizontal polarization of the FM radio broadcast wave band is not limited to the domestic FM band of 76 MHz to 90 MHz, but also of 88 MHz to 108 MHz. TV broadcast wave VHF-LOW band (overseas FM band) is broadened to a level that exceeds the reception level of the whip antenna over a wide band, and, even for AM radio broadcast waves, it exceeds the reception level of the whip antenna depending on the vehicle model. The reception gain has been improved to 1) and TV broadcast waves can be received.

Even when the space for installing the antenna element cannot be secured outside the bus bar, the vertical wire that is orthogonal to the heating wire is provided inside the bus bar, so that it is perpendicular to the outside of the bus bar. It is no longer necessary to provide a linear antenna element.

[Brief description of drawings]

FIG. 1 is a front view showing a first embodiment in which a glass antenna of the present invention is provided on a rear window glass for an automobile.

FIG. 2 is a front view showing a second embodiment in which the glass antenna of the present invention is provided on a rear window glass for an automobile.

FIG. 3 is a front view showing a third embodiment in which the glass antenna of the present invention is provided on a rear window glass for an automobile.

FIG. 4 is a front view showing a fourth embodiment in which the glass antenna of the present invention is provided on a rear window glass for an automobile.

FIG. 5 is a frequency characteristic diagram according to the first embodiment of the present invention.

[Explanation of symbols]

1 plate glass 2 Conductive wire for heating 3, 3 ', 3 "busbar 4, 4'The present invention antenna 5, 5'first element 6, 6'second element 7 Auxiliary element 8,8 'vertical line 10, 10 'feeding point 11 high frequency coil 12 choke coil 13 DC power supply 21-25 Other antennas

Claims (9)

[Claims] 1. A vehicle glass antenna in which a plurality of heating conductive wires and heating wires for anti-fogging, wherein bus bars are connected to both ends of the heating conductive wires, are provided on a rear window glass for a vehicle. A feeding point is provided in the upper margin of the heating wire and is connected so as to have at least a first horizontal wire capable of capacitively coupling with the uppermost wire of the heating conductive wire from the power feeding point directly or through a lead wire. 1 element, or directly from the feeding point, or branched from the position near the feeding point by the first element and arranged vertically on the feeding point side so as to cross-connect with a part of a plurality of heating conductive wires A glass antenna for a vehicle, comprising a second element in which a filament is extended. 2. A vertical line in which the first element has a second horizontal line extending from the feeding point along the upper side of the opening window frame and a first horizontal line adjacent to the uppermost line of the heating conductive line. The glass antenna for a vehicle according to claim 1, wherein the glass antenna is connected by a strip. 3. A vehicle glass antenna in which a plurality of heating conductive wires and heating wires for anti-fogging, wherein bus bars are connected to both ends of the heating conductive wires, are provided on a rear window glass for a vehicle. A feeding point is provided in the lower margin of the heating wire and is connected so as to have at least a first horizontal wire that can be capacitively coupled to the bottom wire of the heating conductive wire from the power feeding point directly or through a lead wire. 1 element, or directly from the feeding point, or branched from the position near the feeding point by the first element and arranged vertically on the feeding point side so as to cross-connect with a part of a plurality of heating conductive wires A glass antenna for a vehicle, comprising a second element in which a filament is extended. 4. The first element comprises a vertical line extending from a feeding point along a lower side of the opening window frame and a first horizontal line adjacent to the bottom line of the heating conductive line. The glass antenna for a vehicle according to claim 3, wherein the glass antenna is connected by a strip. 5. At least one vertical filament which intersects with a part or all of the plurality of heating conductive filaments of the anti-fogging heating filament at a right angle is further provided.
A glass antenna for a vehicle according to any one of 1. 6. The length of the horizontal filament of the first element that capacitively couples with the heating filament is approximately 1/4 or more of the length of the adjacent heating filament. A glass antenna for a vehicle according to claim 1. 7. The length of the vertical line of the second element along the bus bar is about ¼ or more of the length of the bus bar, and the length of the vertical line is about 1/4 or more. Glass antenna for vehicles. 8. The glass antenna for a vehicle according to claim 1, wherein the distance between the vertical line of the second element and the bus bar is 5 mm or more. 9. A glass antenna for a vehicle according to claim 1, wherein a direct current power source is connected to the bus bar through at least a choke coil.