JPS5913404A - Antenna glass for back window of car - Google Patents

Abstract

PURPOSE:To provide antenna glass having sufficient receiving sensitivity even if the antenna glass is applied for a rift-back or hatch-back type back window to be freely opened/closed and non-directivity for FM broad-casting waves by improving the pattern of antenna lines. CONSTITUTION:A glass plate 11 is provided with many heater lines 14 extended horizontally as a power supply heater 12 for removing blur due to dew condensation generated on the glass surface and bus bars 15 extended virtically in order to supply electric power to the heater line 14 group. As the basic pattern of an antenna conductor 13, a horizontal main antenna line 21 having a power supply point on the side part of the glass plate 11, an auxiliary antenna line 22 fitted close to the upper window frame of the main antenna line 21 with a prescribed distance from the main antenna line 21 so as to be extended in the horizontal direction of the glass plate 11, a phase adjusting antenna line 23 to connect the main antenna line 21 with the auxiliary line 22, and a vertical antenna line 17 are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an antenna glass for a rear window of an automobile, which has improved directivity when receiving FM broadcasts.

Whip antennas have traditionally been widely used as antennas for car radio receivers, but recently, as an alternative to this, antennas have been installed on the surface or inside of the glass plate of the front window or window of a car. Antenna glasses equipped with amplifier holes are beginning to be widely used. Such antenna glass value 1, improvement set of antenna wire pattern,
Thanks to improvements in the amplifier, choke coil, capacitor, etc. attached to the antenna, the receiving sensitivity and S/N ratio are good for AM broadcasting, and the receiving sensitivity and S/N ratio are good for FM broadcasting. 21 For example, as shown in FIG. 1, a large number of heater wires 4 and a busbar 3 that feeds power to the heater wires 4 are used.
A main antenna wire 5 extending in the lateral direction of the glass plate, above the fogging removal electricity heating heater 2 of the automobile rear window glass plate 1 provided with the fogging removal electricity heating heater 2, An auxiliary antenna line 6 that extends in the lateral direction of the glass plate near the window frame above the main antenna line 5 and is spaced apart from the main antenna line 5 by a predetermined distance connects the main antenna line 5 and the auxiliary antenna acid 6. The type of antenna glass that has an antenna conductor 9 that connects the antenna wire 7 for phase adjustment and the feed point 8 that connects the antenna feeder line provided on the side of the glass plate is of course suitable for AM broadcast waves. This is a typical antenna glass with excellent reception performance and sufficient directivity even for FM broadcast waves.

However, although this type of antenna glass can provide sufficient antenna performance when used by being fitted into the rear window of a car that does not open and close, When used in windows, a drawback was found that sufficient gain and omnidirectionality could not be obtained.

The reason for this is thought to be that the ratio of the vertical dimension to the horizontal dimension of the glass shape is υ larger than that of glass used by being fitted into a rear window that does not open or close.

For example, if the antenna glass with the pattern shown in Figure 1 is used for the rear window of a 7-back type, the rear window opens and closes, and the FM broadcast waves (76MHz, 80MHz, 85MHz)
MHz, 90 MHz), the directivity was as shown in FIG. 20, and it was found that the omnidirectionality was poor.

The present invention improves these points and provides an antenna glass that provides sufficient reception sensitivity and omnidirectionality for FMM broadcast waves even when applied to a liftback or hatchback type window in which the rear window opens and closes. This was obtained as a result of research for the purpose of and a bus bar that supplies power to the heater wire extending along =V
In an antenna glass for a rear window of an automobile, which is provided with an energizing heater for removing fog and an antenna conductor on the upper part of the energizing heater for defogging, from the side part of the antenna conductor to the side end of the glass plate and the bus bar. The present invention relates to an antenna glass for a rear window of an automobile, characterized in that a vertical antenna wire is provided extending downward through the antenna glass.

Hereinafter, the present invention will be explained in more detail with reference to the drawings.

The glass plate 11 for a rear window of an automobile according to the present invention is provided with an electrical heating heater for removing fogging spots in order to remove fogging spots caused by dew condensation formed on the surface of the glass plate. The defogging energizing heater 12 is provided so as to cover at least a portion of the substantially central area of the glass plate so that good rearward visibility can be obtained when the rear window glass becomes foggy due to dew condensation. This energizing heater 12 for rock removal has a large number of heater wires 14 extending in the horizontal direction of the glass plate 11, and a bus bar 15 extending in the vertical direction of the glass plate 11 for supplying power to the group of heater wires 140. are doing.

For example, as shown in FIGS. 2 to 17, the energizing heater for defogging provided on the glass plate is arranged in lines that are approximately parallel to each other at intervals of 2 cm to 4 cm in the lateral direction of the glass plate 11. A terminal part 2 for connecting a large number of heater wires 14 of about 0.5 cm to 2 mm and a bus bar 15 connected to the supply end of the heater casting 14 and a power lead wire.
0 is the most common electric heating heater for defogging, but it is of course not limited to these.

In addition, this defogging heater 12 is equipped with Nos. 2.7 and 11.1 so that the omnidirectionality as an antenna is improved.
2, 14. 16. 17 As shown in the figure, the pattern of the power supply circuit of the energizing heating heater 12 for fog removal is shaped like a U-shape, that is, one side of the opposing bus bars (-15) is divided into two, and this bus bar 15
a.

It is best to connect a lead wire to each of the busbars 15b so that the supplied current flows from the busbar 15a or 15b through the busbar 15 to the busbar 15b or 15a in a U-shape. 7.8-10,13.
As shown in Figure 15, bus bars 15 are installed at both ends of the heater wire 140 group.
The phosphor removal heating heater 12 may have a pattern of so-called )-shaped busno-ku connected to each other. It may also be an energizing heater for defogging, in which a current flows through.

In the present invention, the pattern of the antenna conductor provided on the glass plate is selected according to the shape of the car, the size and shape of the glass plate, etc., and has the optimum gain as an antenna for receiving radio waves having omnidirectionality and especially horizontal polarization plane. A pattern is selected that provides omnidirectionality when This antenna conductor is preferably provided as a combination of linear conductors on the top of the glass plate, that is, on the top of the glass plate when the glass plate is fitted into the window of an automobile. This antenna conductor has a high gain for both FM and AM broadcast waves, and may be designed in a ladder pattern that co-operates with both the FM and AM broadcast wave bands.
The pattern may be designed to receive both FM and AM broadcast waves by dividing it into a part that mainly receives broadcast waves and a part that mainly receives FM broadcast waves, or a pattern that receives both FM and AM broadcast waves. It is also possible to design a pattern that is divided into a part that mainly receives AM broadcast waves and a part that mainly receives AM broadcast waves, and receives both FM and AM broadcast waves.

The pattern of this antenna conductor is an antenna conductor 13 in which a plurality of symmetrical linear antenna wires are combined on top of an energizing heater 12 for removing fogging from a glass plate 11, as shown in FIG. Or the third
~As shown in Figure 17, with respect to the longitudinal center line of the car, the feeding point for connecting the antenna feed line is located in the center of the glass plate in a pattern that looks like a combination of multiple linear antenna conductors that are asymmetrical on the left and right sides. It is also possible to use an antenna feeder with a pattern that combines a plurality of linear antenna wires that are asymmetrical with respect to the longitudinal center line of the vehicle, as shown in Figures 4 to 17. The feeding point of the antenna conductor connecting the wires may be located on either the left or right side of the glass plate in the lateral direction.

In particular, the latter two antenna conductor nodules are asymmetrical with respect to the longitudinal centerline of the vehicle, and the feeding point of the antenna conductor is located on the horizontal side of the glass antenna. Therefore, the operational center line of the glass antenna and the longitudinal center line of the vehicle can be deflected, for example, the operational orientation of the antenna glass relative to the vehicle body can be rotated by nearly 90'; It is possible to effectively improve the figure-of-eight directivity characteristic with the de-f point.
Omnidirectionality can be improved.

Among them, the antenna conductor pattern 7 is 4th to 1st.
As shown in FIG. 7, a main antenna line 21 having a feeding point is provided horizontally on the side of the glass plate 11, and extends in the horizontal direction of the glass plate 11 near the window frame above the main antenna line 21.
The present invention also provides an antenna conductor having a pattern in which an auxiliary antenna wire 22 is provided at a predetermined interval from the main antenna wire 21, and a phase adjustment antenna wire 23 is provided to connect the main antenna wire 21 and the auxiliary antenna wire 22. The pattern of the antenna conductor of the antenna glass is optimal because it has excellent reception sensitivity for AM and FM broadcast waves and omnidirectionality for FM broadcast waves. Note that the antenna conductor 13 shown in FIG. 4 is a basic pattern of this type.

The following antenna conductor pattern will be explained.

The main antenna wire 21 of the antenna conductor is provided to extend horizontally from the side of the glass plate 11 to the center of the antenna glass when the antenna glass is fitted into the rear window of an automobile, and has one end. is connected to the power supply point 24 via a lead wire to the power supply point, and the end opposite to the power supply point 24 is an open end, and its length is particularly F.
(λ/
4) α±(λ/20)α (α: wavelength shortening rate of the antenna glass), for example, 40 cm to 90 cm, and furthermore, the open end of the main antenna wire 21 is located almost in the middle area of the glass antenna. It is particularly preferable that the In addition, the main antenna line 21 is, as shown in FIGS. 4 to 17,
It is not limited to one straight line, it can be multiple lines,
It may also be curved. FIG. 10 shows an example in which two main antenna lines 21 of different lengths are provided to improve omnidirectionality.

The auxiliary antenna leg 22 extends in the lateral direction of the glass plate 11 near the window frame above the main antenna line 21, and is disposed at a predetermined distance from the main antenna line 21. Note that this auxiliary antenna wire 22 may be provided at the lower blade of the main antenna wire 21. The distance between the auxiliary antenna line 22 and the main antenna line 21 is 1 to K in A row spacing.
In terms of receiving sensitivity, it is particularly preferable to set the value to about en. or,
It is preferable that the stand for installing the auxiliary Ambuna wire 22 near the window frame be provided at a distance of about 1 to 10 tM from the window frame. As shown in FIGS. 4 to 17, this auxiliary antenna wire 22 is optimally provided above the center of the glass plate 11 and has a symmetrical pattern with both ends open. However, the auxiliary antenna wire 22 only needs to have at least one end, and at least one of which is open, and does not necessarily need to have both ends open. Moreover, it may be provided not above the central part of the glass plate but on the side of the glass plate.

The pattern of the auxiliary antenna wire 22 is not limited to the illustrated example, and may be changed as appropriate depending on the shape of the car body, the shape and size of the glass plate, the pattern of other antenna wires, or various other factors. , length, number, pattern, etc. are selected.

Further, the auxiliary antenna line 23 for phase adjustment is a feeding point 2 between the main antenna line 21 and the auxiliary antenna line 22 which have different directivity characteristics.
In order to adjust the phase of the FM broadcast waves in 4 so that the main antenna line 21 and the auxiliary antenna line 22 are optimally combined, and to operate in a reinforcing manner to increase the reception sensitivity of AM broadcast waves. Its length is selected so as to adjust the phase of the received radio wave range. This phase adjustment antenna 23 connects between the feed point side of the main antenna line 21 and the auxiliary antenna line 22. 3. For example, the length of the phase adjustment antenna wire 23, including the auxiliary antenna, may be set so that it resonates in the FM broadcast wave frequency band (76 to 90 MHz). λ/4, (3/4)λ, (5/
4) λ...The length may be (n/4)λ (n: odd number). In addition, actually λ/4±λ/20, (3/4
)λ±λ/20...(n/4)λ±2/20, there is no practical problem. (λ: Wavelength) The phase adjustment antenna line 23 described above also has an asymmetrical pattern with respect to the vertical center line of the glass plate, and the horizontal portion of the phase adjustment antenna #23 is similar to the main antenna line 21 and It is preferable that the horizontal portion of the auxiliary antenna line 22 be spaced apart from the horizontal portion of the auxiliary antenna line 22 by a predetermined distance, and that it be substantially parallel to these lines.

Moreover, the patterns of the antenna wire 23 for phase adjustment are 4th to 17th.
As shown in the figure, a folded part 25 may be provided in a part of the part 14
Complementary antenna wire for phase adjustment! I and the main antenna line 21 are preferably connected in a staggered manner so as not to impair the reception sensitivity of the main antenna line 21 and the directivity of broadcast waves. The above phase N
It is optimal to connect the M-aligned antenna wire 267, and connecting the phase adjustment antenna wire 23 to the auxiliary antenna wire 22 also impairs the reception sensitivity of the auxiliary antenna wire 22 and the directivity characteristics of FM broadcast waves. It is preferable to trap it so that it does not exist. For example, it is preferable to connect the phase adjustment antenna wire 23 near the center or end portions of the auxiliary antenna wire 22.

In addition, the power feeding point 24 is located at 1t11 on either the left or right side of the glass plate.
Although it is preferable to connect the antenna wire 21 to the main antenna wire 21 in the lower region, it can also be provided on the upper side of the glass plate or at other locations depending on the design.

Further, if the AM reception performance is insufficient with only the antenna wire described above, an additional antenna wire 26 may be provided as shown in FIGS. 5 to 17, for example.

This energizing heating heater 12 for removing fogging and the antenna conductor 1
3, the antenna conductor should be spaced sufficiently apart from each other, for example, at least 1.5 m, so that the current heating heater 12 for removing fogging does not affect the antenna conductor in terms of direct current or high frequency. Alternatively, the energizing heater 12 for defogging may be used to improve the omnidirectionality and gain of FM.
Alternatively, in order to actively improve the AM gain, the antenna conductor 13 should be placed close to the energizing heater for defogging, but not connected to the DC L connection, for example, at a distance of 0.1 cm to 1 cm.
．． They may be arranged at intervals of 5 cm, particularly 0.1 to 0.5 cm, and connected at high frequencies. In this case,
A coupling wire 27 that connects the topmost heater wire of the energizing heater for fogging → fog removal in a high frequency manner with an interval of 0.1 cm to 1.5 cm is connected to the additional antenna wire 26 or the phase adjustment antenna H23. establish.

Alternatively, the defogging current-carrying heater 12 and the antenna conductor 13 may be directly connected, so that the heater wire 14 and bus bar 15 of the fog-removing current-carrying heater 12 and the bus bar 15 can also be used as the antenna wire.

The example shown in FIGS. 2 to 10 is the first type of antenna glass in which the antenna conductor 13 and the defogging current heating heater 12 are provided at a distance of 2 cm to 5 cm, and the 11.
In the example shown in FIG. 12, the antenna conductor 16 and the defogging current supply and heating heater 12 are connected at high frequency.
This is a second type of antenna glass that is placed close to each other with an interval of 1 cm to 0.5 cm.

The example shown in FIG. 15 is a third type of antenna glass in which the antenna conductor 13 and the defogging current heating heater 12 are directly coupled.

In the antenna glass for an automobile rear window of the present invention, a
, b Removal energization from the side part of the antenna conductor 13 provided on the upper part of the heating heater 12 to the side end part 16 of the glass plate and the bus bars 15, 15a.

15b, and is provided with a vertical antenna line 17 extending downward, that is, in the longitudinal direction of the glass plate, at a predetermined distance from the side edge 16 of the glass plate and the outer ends of the bus bars 15.15a, 15b. There is. This vertical antenna line j7i may be provided only between one side end 16 of the glass plate and the bus bar 15 facing the side end 16, as shown in FIG. 5.6. It is better to provide the vertical antenna wires 17 only between both side edges 16 of the glass plate and the bus bar 15 facing the side edges 16 (see FIGS. 2-4.7-17). It is better to freeze in order to improve omnidirectionality.In addition, the vertical antenna wire 17 is connected to one side of the blade.
When provided at the end, it is more preferable to provide it on the feeding point 24 side of the antenna conductor 13 in order to improve omnidirectionality. This vertical antenna line 17 is connected to bus bars 15.15a, 15b.
1. It is preferable to leave a space of 0.1 cm or more between the two.
Further, when this antenna glass is fitted into the window frame of the rear window, it is preferable to separate the vertical antenna wire 17 by 0.5 m or more from the window frame or the molding provided around the window. Note that if the molding or window frame is not a conductive member, it may be placed closer than 0.5 cm. Vertical antenna line 1
The length of 7 is determined to be an appropriate length so as to obtain the desired performance. Side edge 16 of glass plate and bus bar 15.15
a, 15b, and the vertical antenna wire 17 is not limited to one, but two or more may be provided, or alternatively, the first
As shown in FIG. 4, one warm wire 18 may be provided for each vertical antenna conductor. The point at which the vertical antenna wire 17 is drawn out from the antenna conductor 16 may be any part of the antenna conductor 13, but it is better to draw it out from the side of the antenna conductor 130 in order to improve omnidirectionality. In particular, in the antenna conductor 16 having a pattern as shown in FIGS.
Alternatively, in order to improve omnidirectionality, it is best to draw out the additional antenna wire 26 from a portion located on the side of the glass plate 11 and extend it below the glass plate 11. 4th.
5,6°7.9-17 Figures show one vertical antenna wire 1
7 is drawn out downward from the main antenna line 21, and FIGS. 4.7 to 17 are examples in which one vertical antenna line 17 is drawn out downward from the phase adjustment antenna line 22 or the additional antenna line 26. .

As shown in Figures 15 and 16, on the lower side of the energizing and heating heater 120 for removing fogging from the antenna glass of the present invention, in order to increase reception sensitivity and/or improve omnidirectionality, It is also possible to provide a second antenna conductor 19 in a suitable pattern connected to at least one of the antenna conductors.

The reason why the omnidirectionality is improved by providing the vertical antenna wire 17 on one side edge or both side edges of the antenna glass for the rear window of a car is that the conventional omnidirectional antenna pattern has horizontal elements. This is thought to be due to the fact that it is only a part, and by adding a vertical element to it, a composite correction is performed using the vertical component.

In addition, when using the Ambuna glass of the present invention,
In order to increase the reception sensitivity of AM and FM broadcast waves, or to increase the reception sensitivity of AM broadcast waves, it is preferable to connect a high frequency amplification circuit to the main antenna, the secondary antenna, or both of the glass antenna. Also, on the power supply side of the energizing heater for defogging, the heater is floated at high frequency to prevent the inflow of direct current that causes noise.
A high frequency choke coil or a capacitor can also be inserted to suitably function as an antenna.

The conductors of the main antenna and the sub-antenna according to the present invention are made by applying a conductive paste on the glass surface, which is made by mixing and suspending a conductive metal powder (for example, Ci silver), a low-melting glass frit, a vehicle, and other desired components. Print in a predetermined pattern,
The most typical example is a wire type wire which is fired and then plated if necessary, but it is of course possible to use a single conductive thin metal wire. This thin metal wire is used. A thin metal wire is embedded in a laminated interlayer film in the base, and this is sandwiched between two glass plates to form a laminated glass type.

Next, examples of the present invention will be described.

Example 1 Glass plate 11 for an automobile rear window that was thoroughly washed and dried
An antenna conductor 13 having a main antenna wire 21, an auxiliary antenna wire 22, a phase adjustment antenna wire 23, an additional antenna wire 26, and a vertical antenna wire 17 as shown in FIG. Multiple heaters as shown in the diagram, w1
4 and 7゛ Spar 15. For removal of metal with 15a and 15b (silver base containing futansong and glass frit) to form the pattern of TJ heating heater 12) Silk printing by silk printing method, clean printing method , Dry, Y, then F] 1 Place in a heat oven T: Heat to 650℃ and bake to manufacture antenna glass for the rear window of a car 9. In this antenna glass, the dimensions of each part are as follows. be.

A: 464mm, B: 400mm, C: 438mm D: 28
0mm, E: 60mm, F: 35mm, G: 15mm,
H: 20mm, I: 25mm, J: 50mm, K: 7
mm, L: 22mm, M: 10mm, N: 475m
m, O: 555mm, P: 35mm, Q: 974mm
, R: 725mm, S: 1074mm This antenna glass is fitted into the rear window of a car that has a lift-back type rear window that can be opened and closed by a hinge at the top, and is used to transmit various FM broadcast frequencies (76MHz, 80MHz).
Hz, 85 MHz, 90 MHz), the results of all measurements of the directivity characteristics for radio waves having a horizontal polarization plane are shown in Figures a to d. Note that this measurement was performed in a 60 dB uniform electric field. .

Also, the average gain in the AM broadcast frequency band is 47.4 dB.
Met.

Comparative Example: As shown in Figure 18, a silver paste containing a powder and glass frit was printed on the surface of a glass plate for the rear spring of an automobile using a silk screen printing method to form an embuna pattern as shown in the figure. Dry, then put in a heating oven for 650
The antenna glass was manufactured by heating and baking at ℃. In this antenna glass, the dimensions of each part were as follows.

A'=200mm B'=420mm B"=40
0mmC'=480mm D'=10mm E'
= 30 mm F' = 50 mm G' = 45 mm The directional characteristics of this antenna glass (comparative example product) were measured in the same manner as in the example, and the results are shown in FIGS. 20 (a) to (d). The average gain in the AM broadcast frequency band is 47
．． It was 2dB.

As described above, according to the present invention, for the rear window of a liftback or hatchback type automatic vehicle in which the rear window of an automobile can be opened and closed, in which supination was considered to be the key to obtaining excellent omnidirectionality. It is possible to provide a frame with antenna glass that has excellent omnidirectionality and excellent reception sensitivity. The present invention is not limited to liftback or hatchback type rear windows, but can also be applied to fit-in type rear windows with excellent performance.

[Brief explanation of the drawing]

Fig. 1.18 is a front view of an example of a conventional antenna glass for a rear window of an automobile, Figs. is a directional characteristic diagram of antenna glasses of the present invention and comparative examples. 11: Glass plate for automobile rear window, 12: Electric heating heater for defogging, 13: Antenna conductor, 14: Heater wire, 15.15a, 15b: Busper, 17: Vertical antenna wire, 18: Branch line, 19: second antenna conductor, 2
1: Main antenna line, 22: Auxiliary antenna line, 26: Phase adjustment antenna line, 24: Feeding point

Claims (1)

[Scope of Claims] (1) Power is supplied to a large number of heater wires that cover at least a portion of the substantially central area of the glass plate and extend in the lateral direction of the glass plate, and to the heater wires that extend along the sides of the glass plate. an energizing heating heater for defogging,
In the antenna glass for a rear window of an automobile in which an antenna conductor is provided on the upper part of the energizing heating heater for defogging, the vertical antenna extends downward from the side part of the antenna conductor through between the side edge of the glass plate and the bus bar. Antenna glass for an automatic rear window, characterized by being provided with a directional antenna line. (2) A vertical antenna line is provided that extends downward from each of the left and right sides of the antenna conductor, passing between the side edge of the glass plate and Busno (-). Antenna glass for an automatic rear window as described in item 1. (3) The vertical antenna wire is at least 1 mm from the bus bar.
Antenna glass for a rear window of an automobile according to claim 1, characterized in that the antenna glass is spaced apart by at least 100 degrees. (4) A main antenna line in which the antenna conductor extends laterally from the side of the glass plate toward the center, and an auxiliary antenna that extends laterally in the glass plate at a predetermined interval above or below the main antenna line. a phase adjustment antenna line connecting the main antenna line and the auxiliary antenna line, and a feed point for the antenna conductor connected to the main antenna line in the side area of the glass plate or a lead-out to the antenna feed point. , and dots, and (5) that one end of the main antenna wire is an open end. Antenna glass for a rear window of an automobile according to claim 4. (6) An automobile according to claim 4, characterized in that at least one end of the auxiliary antenna wire is an open end. Antenna glass for the rear window. (Power: The pure width of the antenna for auxiliary antenna wire and phase NQ% is nλα/4±λa/20 (n: odd number, λ: wavelength of the center frequency cell in the FM broadcast wave frequency range, α: Claims ai, characterized in that: wavelength shortening rate of antenna glass)
Antenna glass for an automobile rear window according to item 4. (8) An antenna glass for a rear window of an automobile according to claim 4, wherein an additional antenna wire is connected to the phase adjustment antenna wire. (9) The antenna glass for a rear window of an automobile as set forth in claim 4, characterized in that a vertical antenna line is drawn out downward from the main antenna line. (10) Claim 4 in which the fact that the vertical antenna wire is drawn out downward from the phase adjustment antenna wire is a "sign"
Antenna glass for self-control car windows as described in section. (11) An antenna glass for a rear window of an automobile according to claim 8, characterized in that a vertical antenna line is drawn out downward from the additional antenna line connected to the phase adjustment antenna line. (12) Antenna glass for an automobile rear window according to claim 1, characterized in that a second antenna conductor is provided at the lower part of the energizing heater for removing fogging from a glass plate, connected to a vertical antenna wire. . (13) One of the busbars of the electric heating heater for defogging is divided into two, and the shuttle is configured such that a power lead wire can be connected to each of the upper and lower divided busbars. Antenna glass for a rear window of an automobile as described in 2.