JP2012248981A - Glass antenna for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a glass antenna for a vehicle, capable of favorably performing diversity reception of FM broadcast wave by providing two antennas in an upper blank space of a defogger of a rear glass for a vehicle, even if the upper blank space is narrow.SOLUTION: A glass antenna for a vehicle consists of two antennas for FM broadcast wave disposed in an upper blank space of a defogger of a rear glass for a vehicle. Each of the two antennas includes: one of electric supply parts disposed to be separated from each other on the left and right sides of an upper end part of the rear glass; a vertical wire connected to the electric supply part and suspended therefrom; and a horizontal wire connected to the lower end of the vertical wire. The horizontal wires of the two antennas are disposed to be adjacent to uppermost heating horizontal wires of the defogger, respectively, and capacitively coupled with the uppermost heating horizontal wires, respectively. At least one auxiliary wire for directional characteristic adjustment is connected with the vertical wire or the electric supply part of at least one of the two antennas.

Description

  The present invention relates to a glass antenna that is provided at a defogger upper margin of a rear glass attached to a rear gate of an automobile and is suitable for diversity reception of FM broadcast waves.

  The frequency band for FM radio broadcasting is 76 MHz to 90 MHz in Japan, and 88 MHz to 108 MHz outside Japan.

  When an antenna is provided in an automobile, the antenna is electrically influenced by the vehicle body, and thus it is generally difficult to obtain isotropic directivity with respect to reception sensitivity. Therefore, a plurality of antennas having different directivity characteristics are arranged at spatially separated positions, and diversity reception is performed by the plurality of antennas, thereby improving reception performance.

  When receiving FM broadcast waves with a sedan type vehicle, two glass antennas may be spatially separated in the margin of the rear glass defogger.

  However, in the case of an automobile equipped with a rear gate such as a wagon car or an SUV (Sport Utility Vehicle) car, the angle of attachment of the rear glass to the vehicle body is larger than that of a sedan type automobile. The vertical dimension of the rear glass is smaller than the vertical dimension of the rear glass of a sedan type automobile. Therefore, in the case of an automobile equipped with a rear gate, the space in the upper and lower margins of the rear glass defogger becomes small, and it becomes difficult to dispose a plurality of antennas on the rear glass.

  Therefore, in order to receive FM broadcast waves with a car equipped with a rear gate, for example, as disclosed in Japanese Patent Application Laid-Open No. 2009-105665, as the first antenna among the two antennas provided in the car, It has been proposed to use a glass antenna disposed under the defogger of the rear glass, and use an RMA (Roof Mount Antenna) disposed on the roof of the automobile as the other antenna ( Patent Document 1).

  Japanese Patent Laid-Open No. 2-42802 discloses a horizontal antenna, a vertical filament connected to the horizontal filament and extending upward, and an end of the rear glass, with respect to the glass antenna disposed on the upper part of the defogger of the rear glass. There has been proposed an FM antenna comprising a power feeding portion disposed on the feeder, and a feeder wire connecting the upper end of the vertical wire and the power feeding portion. In this glass antenna, the horizontal line is brought close to the uppermost heating line of the defogger to capacitively couple with the defogger to improve reception performance (Patent Document 2).

JP 2009-105665 A JP-A-2-42802

  As for the antenna for receiving FM broadcast waves in an automobile equipped with a rear gate described in Patent Document 1, one of the two antennas provided in the automobile is disposed in a blank portion below the rear glass defogger. Since another antenna is disposed on the roof of the automobile, each antenna must be connected to a feeder line extending from the receiver separately, which increases the number of steps for assembling the automobile. there were.

  Further, the antenna described in Patent Document 2 can obtain relatively good reception sensitivity even when the space of the upper margin of the rear glass is small by capacitively coupling the glass antenna to the defogger. However, when two glass antennas are arranged on the left and right of the upper margin of the defogger one by one with a distance between the feeding parts, the glass antennas electrically interfere with each other, and the respective antennas Since the directivity characteristics of the reception sensitivity of the receiver are almost the same, there is a problem that the effect of diversity reception cannot be obtained.

  The present invention seeks to solve these problems. That is, even when two glass antennas are provided in the upper margin of the rear glass defogger attached to the rear gate when receiving FM broadcast waves in a car equipped with a rear gate, the two glass antennas are satisfactory. The purpose is to make it possible to receive a variety of diversity.

  That is, the present invention relates to a vehicle glass for diversity reception of FM broadcast waves arranged in the upper margin of the defogger of a rear glass having a defogger composed of a bus bar and a plurality of heating wires connected to the bus bar. It is an antenna, and is a glass antenna for vehicles which consists of two antennas, a first antenna for FM broadcast waves and a second antenna for FM broadcast waves.

  The first antenna and the second antenna are respectively a power feeding unit disposed on the upper end portion of the rear glass so as to be separated from each other left and right, a vertical wire connected to the power feeding unit and suspended, and the vertical antenna. A horizontal line connected to the lower end of the line. The horizontal filaments of the two antennas are disposed in proximity to the uppermost heating horizontal filament of the defogger, and are capacitively coupled to the uppermost heating horizontal filament.

  Then, at least one auxiliary line for adjusting directivity is connected to at least one of the two antennas of the two antennas or the feeder.

  In addition, all or a part of the auxiliary wires provided in the two antennas overlap with the horizontal wires connected to any one of the two antennas at an interval in the vertical direction. In some cases, the interval is preferably 10 mm or more.

  Furthermore, at least one auxiliary wire is connected to each of the two antennas, and of the auxiliary wires connected to each antenna, the auxiliary wire is extended in the direction of the center line of the rear glass. When the strips overlap each other with a gap in the vertical direction, it is preferable that the gap is 10 mm or more.

  Further, a directivity adjusting auxiliary wire can be connected to at least one end of the horizontal wires provided in the two antennas.

  A feeding section provided in at least one of the two antennas includes a feeding line extending in a horizontal direction, and a tip of the feeding line is connected to an upper end of the vertical line of the antenna. May be.

  The above-described vehicle glass antenna and a vehicle to which the vehicle glass antenna is attached may include an AM broadcast wave antenna to construct an antenna system that can receive FM broadcast waves and AM broadcast waves.

  As the AM broadcast wave antenna, a glass antenna disposed in a side window of the vehicle may be used.

  Alternatively, the AM broadcast wave antenna may be provided in a roof or a rear spoiler (or a bumper) of the vehicle.

  The glass antenna for a vehicle for FM broadcast waves according to the present invention is disposed in a margin part of the upper portion of the defogger of the rear glass attached to the rear gate when receiving FM broadcast waves by an automobile equipped with a rear gate. Since the directivity characteristics of the reception sensitivity of the two antennas can be made different from each other, good diversity reception can be performed and two antennas for diversity reception are arranged on the rear glass, so that the number of assembly steps of the automobile It is also possible to reduce this.

The front view seen from the vehicle outer side of the antenna pattern of Example 1 of this invention. The front view seen from the vehicle outer side of the antenna pattern of Example 2 of this invention. The front view seen from the vehicle outer side of the antenna pattern of Example 3 of this invention. The front view seen from the vehicle outside of the antenna pattern of Example 4 of the present invention. The front view seen from the vehicle outer side of the antenna pattern of Example 5 of this invention. The front view seen from the vehicle outer side of the antenna pattern of Example 6 of this invention. The front view seen from the vehicle outer side of the antenna pattern of Example 7 of this invention. The front view seen from the vehicle outer side of the antenna pattern of Example 8 of this invention. The front view seen from the vehicle outer side of the antenna pattern of Example 9 of this invention. The front view seen from the vehicle outer side of the antenna pattern of Example 10 of this invention. The front view seen from the vehicle outer side of the antenna pattern of Example 11 of this invention. The front view seen from the vehicle outer side of the antenna pattern of the reference example of this invention. The front view seen from the vehicle outer side of the antenna pattern of the comparative example 1 of this invention. The front view seen from the vehicle outer side of the antenna pattern of the comparative example 2 of this invention. The frequency characteristic figure which compared the average sensitivity in each frequency of the antenna of Example 1 of this invention when the structure of the antenna of Example 1 of this invention was match | combined with FM frequency band outside Japan. The directivity characteristic diagram about the receiving sensitivity in 90 MHz of Example 1 of this invention when the structure of the antenna of Example 1 of this invention is match | combined with FM frequency band outside Japan. The frequency characteristic figure which compared the average sensitivity in each frequency of the antenna of Example 1 of this invention when the structure of the antenna of Example 1 of this invention was matched with FM frequency band in Japan. The directivity characteristic figure about the receiving sensitivity in 78 MHz of Example 1 of this invention when the structure of the antenna of Example 1 of this invention is matched with FM frequency band in Japan. The frequency characteristic figure which compared the average sensitivity in each frequency of the antenna of Example 2 of this invention when the structure of the antenna of Example 2 of this invention was match | combined with FM frequency band outside Japan. The directivity characteristic figure about the receiving sensitivity in 90 MHz of Example 2 of this invention when the structure of the antenna of Example 2 of this invention is match | combined with FM frequency band outside Japan. The frequency characteristic figure which compared the average sensitivity in each frequency of the antenna of the reference example of this invention when the structure of the antenna of the reference example of this invention was match | combined with FM frequency band outside Japan. The directivity characteristic figure about the receiving sensitivity in 90 MHz of the reference example of this invention when the structure of the antenna of the reference example of this invention is match | combined with FM frequency band outside Japan. The frequency characteristic figure which compared the average sensitivity in each frequency of the antenna of the comparative example 1 of this invention when the structure of the antenna of the comparative example 1 of this invention was match | combined with FM frequency band outside Japan. The directivity characteristic figure about the receiving sensitivity in 90 MHz of the comparative example 1 of this invention when the structure of the antenna of the comparative example 1 of this invention is match | combined with FM frequency band outside Japan. The frequency characteristic figure which compared the average sensitivity in each frequency of the antenna of the comparative example 2 of this invention when the structure of the antenna of the comparative example 2 of this invention was match | combined with FM frequency band outside Japan. The directivity characteristic figure about the receiving sensitivity in 90 MHz of the comparative example 2 of this invention when the structure of the antenna of the comparative example 2 of this invention is match | combined with FM frequency band outside Japan. A side view and a rear view of the automobile when a rear glass provided with the antenna pattern according to the first embodiment of the present invention and a side glass provided with an AM broadcast wave glass antenna are attached to the rear gate of the wagon type automobile. . The side view and rear view of the said car when the rear glass by which the antenna pattern which concerns on Example 1 of this invention was arrange | positioned, and the rear spoiler which incorporated the antenna for AM broadcast waves were attached to the rear gate of a wagon type motor vehicle.

<Overall>
The antenna of the present invention has an upper margin of the defogger 4 even when the upper margin of the defogger 4 is narrow because the vertical width f of the rear glass is narrow like the rear glass 1 shown in FIGS. The first antenna 2 and the second antenna 3 are disposed in the glass antenna, and FM broadcast waves can be satisfactorily received by these two antennas.

  Therefore, the antenna of the present invention is a rear gate (opening / closing part provided at the rear part of the automobile) such as a wagon type or SUV (Sport Utility Vehicle) as in the automobile 6 as shown in FIGS. Even when the rear glass defogger 4 having a narrow rear glass width f is arranged in the upper margin of the rear glass defogger 4 like the rear glass 1 attached to the rear gate 64 of the automobile having 64, FM broadcast waves can be received with good diversity. be able to.

<About the basic configuration of the first antenna and the second antenna>
As shown in FIG. 1, the antenna of the present invention is a glass antenna provided in an upper margin part of a defogger 4 of a rear glass 1, and a first antenna 2 and a second antenna 3 are provided in the upper margin part. The FM broadcast wave is diversity-received by these two antennas.

  The basic configuration of both the first antenna 2 and the second antenna 3 is a glass antenna as shown in FIGS. 13 and 14, for example.

  That is, both the first antenna 2 and the second antenna 3 are the first antenna power supply unit 21 and the second antenna power supply unit 31 disposed at the upper end of the rear glass, and the first antenna power supply unit. 21 and the second antenna feed unit 31 are connected to the first antenna feed unit 21 and the second antenna feed unit 31, respectively. Of the first antenna horizontal line 23 and the second antenna vertical line 32 and the first antenna horizontal line 22 and the second antenna vertical line 32, respectively. The basis is composed of the horizontal strips 33.

  The first antenna power supply unit 21 and the second antenna power supply unit 31 are arranged on the left and right sides of the rear glass 1.

  Both the first antenna horizontal line 23 and the second antenna horizontal line 33 are arranged close to the uppermost heating horizontal line 42 of the heating horizontal lines 42 of the defogger 4, This is a case where the uppermost heating horizontal line 42 and the horizontal line 23 of the first antenna and the horizontal line 33 of the second antenna are capacitively coupled, so that the vertical width of the upper margin of the defogger 4 is narrow. Also, good reception sensitivity can be obtained. The distance d and the distance d ′ between the horizontal line 23 of the first antenna and the horizontal line 33 of the second antenna and the uppermost heating horizontal line 42 of the heating horizontal lines 42 of the defogger 4 may be 10 mm or less. .

  Further, the length of each of the horizontal stripes 23 of the first antenna and the horizontal stripes 33 of the second antenna, the connection position of the vertical stripes 22 of the first antenna of the horizontal stripes 23 of the first antenna, and the second By adjusting the connection position of the horizontal line 33 of the second antenna to the vertical line 32 of the second antenna and the length of the vertical line 22 of the first antenna and the length of the vertical line 32 of the second antenna, The input impedance of the antenna can be matched with the characteristic impedance of the feed line connected to the feed points 21 and 31 to the frequency of the desired FM broadcast wave, and good reception sensitivity can be obtained.

  In general, the first antenna power supply unit 21 and the second antenna power supply unit 31 are provided in a region where black ceramic called a black frame on the peripheral edge of the rear glass is printed and fired, and an upper margin of the defogger 4. Since the vertical width of the part is determined by the automobile, there is little room for changing the lengths of the vertical stripes 22 of the first antenna and the vertical stripes 32 of the second antenna. Therefore, like the first antenna power supply unit 21 and the second antenna power supply unit 31 shown in FIGS. 10 and 11, the respective power supply units are connected to the first antenna vertical wire 22 and the second antenna. It is disposed at a position away from the upper end of the vertical wire 32, and the power supply line 21 of the first antenna and the power supply of the second antenna are respectively supplied from the power supply unit 21 of the first antenna and the power supply unit 31 of the second antenna. By extending the wire strip 311 and connecting the vertical line 22 of the first antenna and the upper end of the vertical strip 32 of the second antenna, respectively, the vertical line is changed by changing the length of the feed line. The effect of adjusting the input impedance of the antenna can be obtained in the same manner as changing the length of the strip.

  The first antenna vertical line 22 and the second antenna vertical line 32 are arranged, so that the first antenna power supply unit 21 and the second antenna power supply unit 31 are connected to the upper end of the rear glass. Therefore, the power feeding units can be made inconspicuous. That is, the peripheral portion including the upper end portion of the rear glass usually has a region where black ceramic called a black frame is printed and baked. Therefore, if each of the power supply portions can be disposed on the upper end portion of the rear glass, Since the part is hidden by the black frame, when the antenna of the present invention is viewed from the outside of the vehicle, the power feeding part 21 of the first antenna and the power feeding part 31 of the second antenna are not noticeable. In general, the periphery of the rear glass including the upper end of the rear glass is covered with the interior material, so that the first antenna power supply unit 21 and the second antenna power supply unit 31 can be seen from the vehicle inner side. Can be eliminated.

<Problem of configuring the first antenna and the second antenna only with the basic configuration>
The first antenna 2 and the second antenna 3 have the basic configuration described above, that is, as shown in FIGS. 13 and 14, the first antenna 2 and the second antenna 3 are respectively The first antenna feed section 21 and the second antenna feed section 31, the first antenna vertical stripe 22 and the second antenna vertical stripe 32, and the first antenna horizontal stripe 23 and the second antenna When the antenna horizontal line 33 is used alone, the first antenna 2 and the second antenna 3 electrically affect each other via the defogger 4 to which the respective antennas are capacitively coupled, and receive each other. The directivity characteristics for sensitivity are almost the same.

  Therefore, even if diversity reception is performed with the configuration shown in FIGS. 13 and 14, the directivity characteristics of the reception sensitivity of the first antenna 2 and the second antenna 3 are almost the same. Cannot be improved.

<About the number of auxiliary filaments>
Therefore, for example, as shown in FIGS. 1 to 10, the antenna of the present invention has the first antenna 2 and the second antenna 3 with the first antenna vertical stripe 22 or the second antenna vertical stripe 32. By connecting at least one directivity adjustment auxiliary line to the middle part or either the first antenna power supply unit 21 or the second antenna power supply unit 31, the directivity characteristic of the reception sensitivity is changed. The directivity characteristics regarding the reception sensitivity of the first antenna 2 and the second antenna 3 are made different.

  Alternatively, the auxiliary wire is connected to the tip of the horizontal line 33 of the first antenna, like the second antenna 3 shown in FIG. An auxiliary wire for changing the directivity can be connected to one of the ends of the horizontal wire of the second antenna.

  The auxiliary filament is one of the first antenna 2 and the second antenna 3 as shown in FIGS. 1, 2, 4, 6, 7, 7, 8, 9, 10 and 11, for example. By connecting to one antenna, the directivity of each antenna can be changed.

  Alternatively, as shown in FIGS. 3 and 5, the auxiliary filament may be connected to both the first antenna 2 and the second antenna 3.

  When connecting the auxiliary filament to the first antenna 2 or the second antenna 3, connect only one as shown in FIG. 1, FIG. 2, FIG. 3, FIG. 4, FIG. Alternatively, two wires may be connected as shown in FIG. 6, FIG. 7, FIG. 8, and FIG.

  When the two auxiliary wires are connected to one antenna as in the second antenna 3 of FIGS. 6, 7, 8, and 9, those shown in FIGS. 6, 7, 8, and 9 are used. When the two auxiliary wires are extended in the opposite directions from the respective connection positions like the second antenna 3, the two auxiliary wires are not close to each other. It is possible to prevent mutual influences between the filaments, change the length of the two supplementary filaments, or connect the auxiliary filaments to the vertical filaments and the power feeding unit. By changing the directional characteristics, the directional characteristics can be changed flexibly.

  As the number of auxiliary wires connected to the first antenna 2 and the second antenna 3 increases, the number of elements for adjusting the directivity increases. However, when the number of the auxiliary filaments is increased, the auxiliary filaments come close to each other, so that the auxiliary filaments easily affect each other electrically. For this reason, even if the number of the auxiliary wires is increased and the length of each auxiliary wire and the connection position with the vertical wire and the power feeding part are adjusted, the directivity characteristics cannot be changed greatly. End up.

<About the position of the auxiliary filament>
When the auxiliary wire connected to the antenna is overlapped with the horizontal wire of the antenna with a space e in the vertical direction as in the second antenna 3 of FIGS. When e is narrow, the auxiliary wire is capacitively coupled with the horizontal wire, so that the directivity changes depending on the connection of the auxiliary wire, but the amount of change is smaller than when the interval e is wide. Become.

  Therefore, as in the second antenna 3 in FIGS. 1, 3 and 5, and the first antenna 2 in FIGS. 3 and 4, the horizontal line and the auxiliary line are arranged with respect to the vertical line. When each of the wires is stretched in the opposite direction, the directivity can be easily adjusted by the auxiliary filaments.

  In addition, when the antenna connects a plurality of auxiliary wires, and each auxiliary wire overlaps with a certain interval in the vertical direction, if the interval is narrow, the plurality of auxiliary wires are Because of capacitive coupling, the change in directivity when the second auxiliary wire is connected is smaller than when the first auxiliary wire is connected.

  Further, at least one of the auxiliary filaments is connected to the antenna to which the auxiliary filament is connected as shown in FIGS. 1, 2, 4, 8, 9, and 10. When there is a portion where the horizontal line of the other antenna different from that of the antenna overlaps with a distance e in the longitudinal direction of the rear glass, and the distance e is narrow, the two antennas pass through the overlapping portion. Therefore, the change in directivity is small as compared with the case where the overlapping portion does not exist or the interval e between the overlapping portions is wide.

  Furthermore, at least one of the auxiliary wires is like the first auxiliary wire 24 of the first antenna and the first auxiliary wire 34 of the second antenna in FIG. When there is a portion where the auxiliary filaments connected to two antennas overlap each other with an interval e in the longitudinal direction of the rear glass, and the interval e is narrow, the two antennas overlap each other Therefore, the change in directivity is small as compared with the case where the overlapping portion does not exist or the interval e between the overlapping portions is wide.

  Therefore, when the auxiliary filaments overlap with each other with an interval e in the vertical direction and when the auxiliary filaments and the horizontal filament overlap with each other with an interval e in the vertical direction, the interval e is set to 10 mm or more. When set, the electrical influence between the overlapping filaments becomes small, and the directivity characteristics of the antenna can be changed more greatly.

<About the shape of the auxiliary filaments>
Although the shape of the auxiliary filament is horizontal in FIGS. 1 to 7 and 10, it is bent and arranged like the second auxiliary filament 34 ′ of the second antenna 3 in FIGS. 8 and 9. It doesn't matter.

<About the connection between the power supply unit and the power supply line>
In the antenna of the present invention, a grounding point (not shown) is provided on the vehicle body in the vicinity of the power feeding unit 21 of the first antenna and the power feeding unit 31 of the second antenna, and a coaxial from the receiver (not shown) to the grounding point is not shown. Connected by a cable, the outer side of the coaxial cable is grounded, the core side of the coaxial cable is connected to an AV line (not shown), and the power feeding unit 21 of the first antenna and the power feeding unit of the second antenna from the ground point Up to 31 are connected.

<About the formation method of each filament of this invention>
The antenna of the present invention can use the same conductive ceramic paste as that used to form the defogger 4 and can be printed in the same manner as the defogger 4 and baked in a heating furnace. can do. Alternatively, the antenna of the present invention can be used by pasting an antenna printed on a transparent film with a conductive paint on the upper margin of the defogger 4 of the rear glass 1.

<About an automobile equipped with the antenna of the present invention>
Since the antenna of the present invention is an antenna for FM broadcast waves, for example, when different bands such as AM broadcast waves and digital terrestrial television broadcast waves are to be received by an automobile, an antenna according to the application is installed in the automobile. There is a need.

  For example, when it is desired to receive an AM broadcast wave, the AM broadcast wave antenna 7 for the side glass is disposed on the side glass 63 as shown in FIG. 27, or the rear bumper of the automobile or the rear as shown in FIG. An AM broadcast wave antenna can be incorporated in the spoiler 65.

  When it is desired to receive digital terrestrial broadcast waves, a glass antenna or film antenna for digital terrestrial broadcasting can be provided on the windshield or side glass 63.

  Examples of the present invention will be described below.

<Example 1>
FIG. 1 is a front view of an antenna pattern according to Embodiment 1 of the present invention as viewed from the vehicle exterior side. The antenna according to the first embodiment includes a pair of bus bars 41 disposed at the left and right ends of the rear glass 1 and a plurality of bus bars disposed between the pair of bus bars and both ends thereof connected to the bus bar. Arranged in the upper margin of the defogger 4 composed of the heating filament 42.

  The antenna of this embodiment is composed of a first antenna 2 and a second antenna 3. The first antenna power supply unit 21 and the second antenna power supply unit 31 are respectively disposed on the upper side of the rear glass 1 at positions spaced laterally.

  The first antenna 2 includes a first antenna power supply unit 21, a first antenna vertical line 22, and a first antenna horizontal line 23. The vertical line 22 of the first antenna has an upper end connected to the power feeding unit 21 of the first antenna, and a lower end connected to a middle part of the horizontal line 23 of the first antenna.

  The horizontal line 23 of the first antenna is disposed so as to be close to the uppermost heating horizontal line 42 of the defogger 4 and is capacitively coupled to the uppermost heating horizontal line 42.

  The second antenna 3 includes a feeding portion 31 of the second antenna, a vertical strip 32 of the second antenna, a horizontal strip 33 of the second antenna, and a first auxiliary strip 34 of the second antenna. It consists of and. The vertical line 32 of the second antenna has an upper end connected to the power feeding portion 31 of the second antenna, and a lower end connected to the right end of the horizontal line 33 of the second antenna. One end of the first auxiliary wire 34 of the second antenna is connected to a middle portion of the vertical wire 32 of the second antenna, and is horizontally extended in the right direction.

  The horizontal line 33 of the second antenna is disposed so as to be close to the uppermost heating horizontal line 42 of the defogger 4 and is capacitively coupled to the uppermost heating horizontal line 42.

<Measurement results when the configuration of Example 1 is adjusted to match the FM band outside Japan>
When the configuration of the antenna of this example was adapted to be suitable for receiving FM bands (88 MHz to 108 MHz) outside of Japan, the dimensions were as follows.

Rear glass 1 vertical width f = 500 mm
Rear glass 1 lateral width g = 1300 mm
The lateral distance b from the center line a of the rear glass 1 to the feeding portion 21 of the first antenna b = 140 mm
The lateral distance c from the center line a of the rear glass 1 to the feeding portion 31 of the second antenna c = 140 mm
The distance between the upper edge of the flange 5 and the feeding portion 21 of the first antenna = 10 mm
The distance between the upper edge of the flange 5 and the feeding portion 31 of the second antenna = 10 mm
Size of the feeding portion 21 of the first antenna: width X length = 22 mm X 10 mm
Length of vertical line 22 of the first antenna = 60 mm
The length of the horizontal line 23 of the first antenna = 240 mm
The length of the right side 23a from the connecting portion of the horizontal line 23 of the first antenna to the vertical line 22 of the first antenna = 90 mm
The length of the left side 23b from the connecting portion of the horizontal line 23 of the first antenna to the vertical line 22 of the first antenna = 150 mm
The distance d = 10 mm between the heating horizontal filament 42 at the top of the defogger 4 and the horizontal filament 23 of the first antenna
Size of the feeding portion 31 of the second antenna: width X length = 22 mm X 10 mm
Length of vertical line 32 of second antenna = 60 mm
Length of the first auxiliary wire 34 of the second antenna = 200 mm
The length of the lower side 32a of the vertical line 32 of the second antenna 32 than the connecting portion of the second antenna with the first auxiliary line 34 of the second antenna = 20 mm
The length of the upper side 32b of the vertical line 32 of the second antenna 32 above the connection part of the second antenna with the first auxiliary line 34 of the second antenna = 40 mm
Length of horizontal line 33 of second antenna = 170 mm
The distance d ′ = 10 mm between the heating horizontal filament 42 at the top of the defogger 4 and the horizontal filament 23 of the second antenna
Distance e = 20 mm between the first auxiliary wire 34 of the second antenna and the horizontal wire 23 of the first antenna
The antenna of the present example is printed on the rear glass 1 with a conductive ceramic paste so that the width of each filament is 0.7 mm, dried, and then baked in a heating furnace, An AV line is attached to each of the power feeding portions 31 of the second antenna and then attached to the vehicle body. Then, the outer conductor of the coaxial cable was grounded at a ground point where a coaxial cable extending from a tuner (not shown) was provided on the vehicle body in the vicinity of each feeding point, and the core wire side of the coaxial cable was connected to the AV line.

  As a result of receiving the broadcast wave at the frequency of 76 to 108 MHz in the FM band inside and outside Japan with the antenna of this example created in this way, the results shown in FIGS. 15 to 16 were obtained.

  FIG. 15 shows the average value of the reception sensitivity in all directions of the antennas of 76 MHz to 108 MHz in this embodiment, the solid line is the measurement result of the first antenna 2, and the broken line is the second antenna 3. It is a measurement result.

  FIG. 16 shows a directional characteristic diagram for the reception sensitivity at 90 MHz of the antenna of the present embodiment. The solid line shows the measurement result of the first antenna 2 and the broken line shows the measurement result of the second antenna 3.

  23 and 24 are different from the antenna of the first embodiment in that the antenna of the first comparative example shown in FIG. 13 described later (the first auxiliary wire 34 of the second antenna is not provided). It is a measurement result on the same measurement conditions as Example 1 of the antenna which is.

  FIG. 23 shows the average value of the reception sensitivity at each frequency of 76 MHz to 108 MHz of the antenna of Comparative Example 1 which is a comparative example of the present embodiment, and the solid line shows the measurement result of the first antenna 2. The broken line is the measurement result of the second antenna 3.

  FIG. 24 shows a directional characteristic diagram regarding the reception sensitivity at 90 MHz of the antenna of Comparative Example 1 which is a comparative example of the present embodiment. The solid line indicates the measurement result of the first antenna 2, and the broken line indicates the second result. It is a measurement result of the antenna 3.

  From FIG. 24, when the auxiliary wire is not connected to the second antenna 3, the directivity characteristic for the reception sensitivity of the first antenna 2 and the directivity for the reception sensitivity of the second antenna 3 are It can be seen that the directional characteristics are similar.

  However, when the directivity diagram of this embodiment in FIG. 16 is compared with the comparative example of this embodiment shown in FIG. 24, the directivity of the second antenna 3 changes greatly in the direction indicated by the arrow. As a result, it can be seen that the directivity characteristics of the first antenna 2 and the second antenna 3 are different.

  Furthermore, the average value of the reception sensitivity at each frequency of the antenna of this embodiment in FIG. 15 and the omnidirectional reception sensitivity at each frequency of the antenna of Comparative Example 1 which is a comparative example of this embodiment in FIG. As a result of comparison with the average value at, the characteristics of the feeder line in which the input impedance of the second antenna 3 is connected to the feeder portion 31 of the second antenna by connecting the auxiliary wire to the second antenna 3. The results also show that the impedance is matched and the reception sensitivity is greatly improved.

  By connecting the auxiliary wires in this way, the antenna of this example was able to perform diversity reception well in a frequency band outside Japan.

<Measurement results when the configuration of Example 1 is adjusted to the FM band in Japan>
When the configuration of the antenna of this example was adapted to be suitable for reception in the FM band (76 MHz to 90 MHz) in Japan, the dimensions were as follows.

Rear glass 1 vertical width f = 500 mm
Rear glass 1 lateral width g = 1300 mm
The lateral distance b from the center line a of the rear glass 1 to the feeding portion 21 of the first antenna b = 140 mm
The lateral distance c from the center line a of the rear glass 1 to the feeding portion 31 of the second antenna c = 140 mm
The distance between the upper edge of the flange 5 and the feeding portion 21 of the first antenna = 10 mm
The distance between the upper edge of the flange 5 and the feeding portion 31 of the second antenna = 10 mm
Size of the feeding portion 21 of the first antenna: width X length = 22 mm X 10 mm
Length of vertical line 22 of the first antenna = 60 mm
Length of horizontal line 23 of first antenna = 390 mm
The length of the right side 23a from the connecting portion of the horizontal line 23 of the first antenna to the vertical line 22 of the first antenna = 240 mm
The length of the left side 23b from the connecting portion of the horizontal line 23 of the first antenna to the vertical line 22 of the first antenna = 150 mm
The distance d = 10 mm between the heating horizontal filament 42 at the top of the defogger 4 and the horizontal filament 23 of the first antenna
The size of the feeding portion 31 of the second antenna, width X length = 22 mm X 10 mm
Length of vertical line 32 of second antenna = 60 mm
Length of the first auxiliary wire 34 of the second antenna = 200 mm
The length of the lower side 32a of the vertical line 32 of the second antenna 32 than the connecting portion of the second antenna with the first auxiliary line 34 of the second antenna = 20 mm
The length of the upper side 32b of the vertical line 32 of the second antenna 32 above the connection part of the second antenna with the first auxiliary line 34 of the second antenna = 40 mm
Length of horizontal line 33 of the second antenna = 270 mm
The distance d ′ = 10 mm between the heating horizontal filament 42 at the top of the defogger 4 and the horizontal filament 23 of the second antenna
Distance e = 20 mm between the first auxiliary wire 34 of the second antenna and the horizontal wire 23 of the first antenna
The antenna of the present example is printed on the rear glass 1 with a conductive ceramic paste so that the width of each filament is 0.7 mm, dried, and then baked in a heating furnace, An AV line is attached to each of the power feeding portions 31 of the second antenna and then attached to the vehicle body. Then, the outer conductor of the coaxial cable was grounded at a ground point where a coaxial cable extending from a tuner (not shown) was provided on the vehicle body in the vicinity of each feeding point, and the core wire side of the coaxial cable was connected to the AV line.

  When the broadcast wave in the frequency band of 76 to 108 MHz in the FM band inside and outside Japan was received with the antenna of this example created in this way, the results shown in FIGS. 17 to 18 were obtained.

  FIG. 17 shows the average value of the reception sensitivity in all directions of the antennas of 76 MHz to 108 MHz in this embodiment, the solid line is the measurement result of the first antenna 2, and the broken line is the second antenna 3. It is a measurement result.

  FIG. 18 shows a directivity characteristic diagram regarding the reception sensitivity at 78 MHz of the antenna of the present embodiment. The solid line indicates the measurement result of the first antenna 2, and the broken line indicates the measurement result of the second antenna 3.

  FIG. 17 shows that a large value is obtained as the average value of the reception sensitivity in all directions in the domestic band of 76 MHz to 90 MHz.

  18, the directivity of the first antenna 2 has a large sensitivity on the left side, and the directivity of the second antenna 3 has a large sensitivity on the right side. It can be seen that the directivity characteristics are greatly different.

As described above, the antenna of this example was able to perform diversity reception well in the domestic band.

<Example 2>
FIG. 2 is a front view of the antenna pattern according to the second embodiment of the present invention viewed from the outside of the vehicle. In the antenna of the second embodiment, the lower end of the vertical strip 32 of the second antenna is connected to the middle portion of the horizontal strip 33 of the second antenna, and each of the first antenna 2 and the second antenna 3 is configured. Except for adjusting the length of the line and the connection position between the lines so that the input impedance of the first antenna 2 and the second antenna 3 can be matched between the feed line and the frequency band outside Japan. The configuration is the same as that of the antenna of the first embodiment.

  The antenna of the present example is printed on the rear glass 1 with a conductive ceramic paste so that the width of each filament is 0.7 mm, dried, and then baked in a heating furnace, An AV line is attached to each of the power feeding portions 31 of the second antenna and then attached to the vehicle body. Then, the outer conductor of the coaxial cable was grounded at a ground point where a coaxial cable extending from a tuner (not shown) was provided on the vehicle body in the vicinity of each feeding point, and the core wire side of the coaxial cable was connected to the AV line.

  When the broadcast wave at the frequency of 88 to 108 MHz in the FM band outside Japan is received with the antenna of this embodiment created in this way, the first antenna 2 and the second antenna 3 are different as in the first embodiment. Directional characteristics were obtained, and it was found that it was at a practical level.

  Of course, the first antenna 2 and the second antenna 3 are adjusted by adjusting the lengths of the wires constituting the first antenna 2 and the second antenna 3 of the present embodiment and the connecting positions of the wires. If the input impedance of the power supply line is matched with the characteristic impedance of the feeder line in the frequency band in Japan, as in the case where this embodiment is adjusted to the frequency band outside Japan, in the frequency band in Japan, With the antenna of this embodiment, the effect of diversity reception can be obtained.

<Example 3>
FIG. 3 is a front view of an antenna pattern according to the third embodiment of the present invention as viewed from the vehicle exterior side. In the antenna of the third embodiment, the horizontal line 23 of the first antenna is connected to the lower end of the vertical line 22 of the first antenna at the left end, and is extended in the right direction. The first auxiliary wire 24 of the first antenna is connected to the middle portion of the strip 22, and the configuration differs from that of the first embodiment in that it extends in the left direction. The dimensions were as follows when it was adapted to be suitable for reception of FM bands (88 MHz to 108 MHz) outside Japan.

Rear glass 1 vertical width f = 500 mm
Rear glass 1 lateral width g = 1300 mm
The lateral distance b from the center line a of the rear glass 1 to the feeding portion 21 of the first antenna b = 140 mm
The lateral distance c from the center line a of the rear glass 1 to the feeding portion 31 of the second antenna c = 140 mm
The distance between the upper edge of the flange 5 and the feeding portion 21 of the first antenna = 10 mm
The distance between the upper edge of the flange 5 and the feeding portion 31 of the second antenna = 10 mm
Size of the feeding portion 21 of the first antenna: width X length = 22 mm X 10 mm
Length of vertical line 22 of the first antenna = 60 mm
Length of the first auxiliary wire 24 of the first antenna = 200 mm
The length of the lower side 22a of the vertical line 22 of the first antenna from the connecting portion of the first antenna with the first auxiliary line 24 of the first antenna = 10 mm
The length of the upper side 22b of the vertical line 22 of the first antenna from the connection part of the first antenna with the first auxiliary line 24 of the first antenna = 50 mm
Length of horizontal line 23 of the first antenna = 90 mm
The distance d = 10 mm between the heating horizontal filament 42 at the top of the defogger 4 and the horizontal filament 23 of the first antenna
Size of the feeding portion 31 of the second antenna: width X length = 22 mm X 10 mm
Length of vertical line 32 of second antenna = 60 mm
Length of the first auxiliary wire 34 of the second antenna = 200 mm
The length of the lower side 32a of the vertical line 32 of the second antenna 32 than the connecting portion of the second antenna with the first auxiliary line 34 of the second antenna = 20 mm
The length of the upper side 32b of the vertical line 32 of the second antenna 32 above the connection part of the second antenna with the first auxiliary line 34 of the second antenna = 40 mm
Length of horizontal line 33 of second antenna = 170 mm
The distance d ′ = 10 mm between the heating horizontal filament 42 at the top of the defogger 4 and the horizontal filament 23 of the second antenna
Distance e = 10 mm between the first auxiliary wire 34 of the second antenna and the first auxiliary wire 24 of the first antenna
The antenna of the present example is printed on the rear glass 1 with a conductive ceramic paste so that the width of each filament is 0.7 mm, dried, and then baked in a heating furnace, An AV line is attached to each of the power feeding portions 31 of the second antenna and then attached to the vehicle body. Then, the outer conductor of the coaxial cable was grounded at a ground point where a coaxial cable extending from a tuner (not shown) was provided on the vehicle body in the vicinity of each feeding point, and the core wire side of the coaxial cable was connected to the AV line.

  As a result of receiving the broadcast wave at the frequency of 76 to 108 MHz in the FM band inside and outside Japan with the antenna of the present embodiment created in this way, the results shown in FIGS. 19 to 20 were obtained.

  FIG. 19 shows the average value of the reception sensitivity in each direction of the frequency of 76 MHz to 108 MHz of the antenna of the present embodiment, the solid line is the measurement result of the first antenna 2, and the broken line is the second antenna 3. It is a measurement result.

  FIG. 20 shows a directional characteristic diagram for the reception sensitivity at 90 MHz of the antenna of this embodiment. The solid line shows the measurement result of the first antenna 2 and the broken line shows the measurement result of the second antenna 3.

  25 and 26 include the antenna of Comparative Example 2 shown in FIG. 14 described later (the first auxiliary wire 24 of the first antenna and the first auxiliary wire 34 of the second antenna). This is a measurement result under the same measurement conditions as in Example 3) (antenna having a configuration different from that of Example 3).

  FIG. 25 shows the average value of the reception sensitivity at each frequency of 76 MHz to 108 MHz of the antenna of Comparative Example 2 which is a comparative example of the present embodiment, and the solid line shows the measurement result of the first antenna 2. The broken line is the measurement result of the second antenna 3.

  FIG. 26 shows a directivity characteristic diagram regarding the reception sensitivity at 90 MHz of the antenna of the comparative example 2 which is a comparative example of the present embodiment. The solid line indicates the measurement result of the first antenna 2, and the broken line indicates the second result. It is a measurement result of the antenna 3.

  From FIG. 26, when the auxiliary filament is not connected to the first antenna 2 and the second antenna 3, respectively, the first antenna 2 and the second antenna 3 have directivity characteristics with respect to the reception sensitivity. It can be seen that they are similar.

  However, when the directivity diagram of this embodiment in FIG. 20 is compared with the comparative example of this embodiment shown in FIG. 26, the directivity of the second antenna 3 changes greatly in the direction indicated by the arrow. As a result, it can be seen that the directivity characteristics of the first antenna 2 and the second antenna 3 are different.

  Further, the average value of the reception sensitivity at each frequency of the antenna of this embodiment in FIG. 19 and the omnidirectional reception sensitivity at each frequency of the antenna of Comparative Example 2 which is a comparative example of this embodiment in FIG. When the auxiliary antenna 24 of the first antenna is connected to the first antenna 2, the input impedance of the first antenna 2 is matched with the characteristic impedance of the feeder line. The results showed that the sensitivity was greatly improved.

  By connecting the auxiliary wires in this way, the antenna of this example was able to perform diversity reception well in a frequency band outside Japan.

  In this embodiment, the distance e between the first auxiliary wire 24 of the first antenna and the first auxiliary wire 34 of the second antenna is 10 mm. As the distance e is made smaller than 10 mm, the directivity characteristics of the reception sensitivities of the first antenna 2 and the second antenna 3 become similar, so that the distance e becomes 10 mm or more. It is preferable to constitute the antenna of the present invention.

  Of course, the first antenna 2 and the second antenna 3 are adjusted by adjusting the lengths of the wires constituting the first antenna 2 and the second antenna 3 of the present embodiment and the connecting positions of the wires. If the input impedance of the power supply line is matched with the characteristic impedance of the feeder line in the frequency band in Japan, as in the case where this embodiment is adjusted to the frequency band outside Japan, in the frequency band in Japan, With the antenna of this embodiment, the effect of diversity reception can be obtained.

<Example 4>
FIG. 4 is a front view of an antenna pattern according to Embodiment 4 of the present invention as viewed from the outside of the vehicle. The antenna of the fourth embodiment adjusts the configuration of the filaments that respectively configure the first antenna 2 and the second antenna in the first embodiment, and the characteristic impedance of the feeder line in the FM frequency band outside of Japan In the antenna pattern in which the input impedances of the two antennas are matched, the first antenna 2 is moved to a position that is line-symmetric with respect to the center line a, and is newly set as the second antenna 3. The second antenna 3 is moved to a position that is line symmetric with respect to the center line a, so that the first antenna 2 is newly formed.

  The antenna of the present example is printed on the rear glass 1 with a conductive ceramic paste so that the width of each filament is 0.7 mm, dried, and then baked in a heating furnace, An AV line is attached to each of the power feeding portions 31 of the second antenna and then attached to the vehicle body. Then, the outer conductor of the coaxial cable was grounded at a ground point where a coaxial cable extending from a tuner (not shown) was provided on the vehicle body in the vicinity of each feeding point, and the core wire side of the coaxial cable was connected to the AV line.

  When the broadcast wave at the frequency of 88 to 108 MHz in the FM band inside and outside Japan was received with the antenna of the present embodiment created in this way, the first antenna 2 and the second antenna 3 are similar to the first embodiment. It was found that different directivity characteristics were obtained and it was at a practical level.

  At this time, the directivity characteristic of the first antenna 2 of the present embodiment is obtained by inverting the directivity characteristic regarding the reception sensitivity of the second antenna 3 of the first embodiment to the left and right, and the second antenna of the present embodiment. The directional characteristics of 3 are obtained by inverting the directional characteristics of the reception sensitivity of the first antenna 2 of Example 1 to the left and right.

  Of course, in the antenna of the first embodiment, the configuration of the filaments respectively constituting the first antenna 2 and the second antenna 3 in the FM frequency band in Japan in the first embodiment is adjusted, and the input of the two antennas is adjusted. Even when the impedance and the characteristic impedance of the feeder line are matched, when the two antennas are moved to positions that are symmetric with respect to the center line a as in this embodiment, Similar to the case where the present embodiment is adjusted to the frequency band outside Japan, the antenna of the present embodiment can achieve the effect of diversity reception in the frequency band in Japan.

<Example 5>
FIG. 5 is a front view of an antenna pattern according to Embodiment 5 of the present invention as viewed from the vehicle outer side. In the antenna of the fifth embodiment, the horizontal line 33 of the second antenna has its left end connected to the lower end of the vertical line 32 of the second antenna and is extended in the right direction. The vertical line of the second antenna The first auxiliary wire 34 of the second antenna connected to the middle portion of the strip 32 extends leftward, and the first antenna first wire 34 extends to the middle portion of the vertical strip 22 of the first antenna. The auxiliary wire 24 is connected and extended in the right direction, and the length of each wire constituting each of the first antenna 2 and the second antenna 3 and the connection position of each wire are adjusted, Except that the input impedance of the antenna 2 and the second antenna 3 is matched with the characteristic impedance of the feeder line in the FM frequency band outside Japan, the configuration is the same as that of the antenna of the first embodiment.

  The antenna of the present example is printed on the rear glass 1 with a conductive ceramic paste so that the width of each filament is 0.7 mm, dried, and then baked in a heating furnace, An AV line is attached to each of the power feeding portions 31 of the second antenna and then attached to the vehicle body. Then, the outer conductor of the coaxial cable was grounded at a ground point where a coaxial cable extending from a tuner (not shown) was provided on the vehicle body in the vicinity of each feeding point, and the core wire side of the coaxial cable was connected to the AV line.

  When the broadcast wave at the frequency of 88 to 108 MHz in the FM band outside Japan is received with the antenna of this embodiment created in this way, the first antenna 2 and the second antenna 3 are different as in the first embodiment. Directional characteristics were obtained, and it was found that it was at a practical level.

  Of course, the first antenna 2 and the second antenna 3 are adjusted by adjusting the lengths of the wires constituting the first antenna 2 and the second antenna 3 of the present embodiment and the connecting positions of the wires. If the input impedance is matched with the characteristic impedance of the feeder in the frequency band in Japan, the frequency band in Japan is the same as in the case of adjusting the present embodiment to the frequency band outside Japan. With the antenna of the embodiment, the effect of diversity reception can be obtained.

<Example 6>
FIG. 6 is a front view of an antenna pattern according to Embodiment 6 of the present invention as viewed from the vehicle outer side. The antenna of the sixth embodiment is the second auxiliary line 34 of the second antenna at the same connection position as the first auxiliary line 34 of the second antenna in the middle of the vertical line 32 of the second antenna. 'Is added and extended to the left side, and the length of the filaments constituting each of the first antenna 2 and the second antenna 3 and the connection position between the filaments are adjusted, and the first antenna 2 and the second antenna 2 The antenna 3 has the same configuration as that of the antenna of Example 1 except that the input impedance of the antenna 3 is matched with the characteristic impedance of the feeder line in the FM frequency band outside Japan.

  The antenna of the present example is printed on the rear glass 1 with a conductive ceramic paste so that the width of each filament is 0.7 mm, dried, and then baked in a heating furnace, An AV line is attached to each of the power feeding portions 31 of the second antenna and then attached to the vehicle body. Then, the outer conductor of the coaxial cable was grounded at a ground point where a coaxial cable extending from a tuner (not shown) was provided on the vehicle body in the vicinity of each feeding point, and the core wire side of the coaxial cable was connected to the AV line.

  When the broadcast wave at the frequency of 88 to 108 MHz in the FM band outside Japan is received with the antenna of this embodiment created in this way, the first antenna 2 and the second antenna 3 are different as in the first embodiment. Directional characteristics were obtained, and it was found that it was at a practical level.

  Of course, the first antenna 2 and the second antenna 3 are adjusted by adjusting the lengths of the wires constituting the first antenna 2 and the second antenna 3 of the present embodiment and the connecting positions of the wires. If the input impedance is matched with the characteristic impedance of the feeder in the frequency band in Japan, the frequency band in Japan is the same as in the case of adjusting the present embodiment to the frequency band outside Japan. With the antenna of the embodiment, the effect of diversity reception can be obtained.

<Example 7>
FIG. 7: is the front view seen from the vehicle outer side of the antenna pattern which concerns on Example 7 of this invention. The antenna of Example 7 is connected to the connection position of the second auxiliary wire 34 ′ of the second antenna connected to the middle portion of the vertical wire 32 of the second antenna and the vertical wire 32 of the second antenna. The connection position of the first auxiliary wire 34 of the connected second antenna is not the same place but a different place, so that the wire constituting each of the first antenna 2 and the second antenna 3 The input impedances of the first antenna 2 and the second antenna 3 are connected to the power feeding unit 21 of the first antenna and the power feeding unit 31 of the second antenna by adjusting the length and the connection position of the filaments. The configuration is the same as that of the antenna of the sixth embodiment except that the characteristic impedance of the feeder line is matched with the FM frequency band outside Japan.

  The antenna of the present example is printed on the rear glass 1 with a conductive ceramic paste so that the width of each filament is 0.7 mm, dried, and then baked in a heating furnace, An AV line is attached to each of the power feeding portions 31 of the second antenna and then attached to the vehicle body. Then, the outer conductor of the coaxial cable was grounded at a ground point where a coaxial cable extending from a tuner (not shown) was provided on the vehicle body in the vicinity of each feeding point, and the core wire side of the coaxial cable was connected to the AV line.

  When the broadcast wave at the frequency of 88 to 108 MHz in the FM band outside Japan is received with the antenna of this embodiment created in this way, the first antenna 2 and the second antenna 3 are different as in the first embodiment. Directional characteristics were obtained, and it was found that it was at a practical level.

  Of course, the first antenna 2 and the second antenna 3 are adjusted by adjusting the lengths of the wires constituting the first antenna 2 and the second antenna 3 of the present embodiment and the connecting positions of the wires. If the input impedance of the power supply line is matched with the characteristic impedance of the feeder line in the frequency band in Japan, as in the case where this embodiment is adjusted to the frequency band outside Japan, in the frequency band in Japan, With the antenna of this embodiment, the effect of diversity reception can be obtained.

<Example 8>
FIG. 8 is a front view of an antenna pattern according to the eighth embodiment of the present invention as viewed from the vehicle outer side. In the antenna of Example 8, the second auxiliary line 34 ′ of the second antenna is connected to the left end of the horizontal line 33 of the second antenna, and the second auxiliary line 34 ′ of the second antenna is connected to the second antenna. Bending part 34'a of the 2nd auxiliary filament of the 2nd antenna is formed in the middle, the length of the filament which constitutes each of the 1st antenna 2 and the 2nd antenna 3, and By adjusting the connection position between the filaments, the input impedances of the first antenna 2 and the second antenna 3 are connected to the power feeding unit 21 of the first antenna and the power feeding unit 31 of the second antenna. The configuration is the same as that of the antenna of the first embodiment except that the characteristic impedance is matched with the FM frequency band outside Japan.

  The antenna of the present example is printed on the rear glass 1 with a conductive ceramic paste so that the width of each filament is 0.7 mm, dried, and then baked in a heating furnace, An AV line is attached to each of the power feeding portions 31 of the second antenna and then attached to the vehicle body. Then, the outer conductor of the coaxial cable was grounded at a ground point where a coaxial cable extending from a tuner (not shown) was provided on the vehicle body in the vicinity of each feeding point, and the core wire side of the coaxial cable was connected to the AV line.

  When the broadcast wave at the frequency of 88 to 108 MHz in the FM band outside Japan is received with the antenna of this embodiment created in this way, the first antenna 2 and the second antenna 3 are different as in the first embodiment. Directional characteristics were obtained, and it was found that it was at a practical level.

  Of course, the first antenna 2 and the second antenna 3 are adjusted by adjusting the lengths of the wires constituting the first antenna 2 and the second antenna 3 of the present embodiment and the connecting positions of the wires. If the input impedance of the power supply line is matched with the characteristic impedance of the feeder line in the frequency band in Japan, as in the case where this embodiment is adjusted to the frequency band outside Japan, in the frequency band in Japan, With the antenna of this embodiment, the effect of diversity reception can be obtained.

<Example 9>
FIG. 9 is a front view of an antenna pattern according to the ninth embodiment of the present invention viewed from the vehicle outer side. In the antenna of the ninth embodiment, the right end of the second auxiliary line 34 ′ of the second antenna is connected to the power feeding portion 31 of the second antenna, is extended to the left side, and is bent in the middle of the second antenna. The second auxiliary wire bend 34'a is formed, and the length of the wire constituting each of the first antenna 2 and the second antenna 3 and the connection position between the wires are adjusted. Then, the input impedance of the first antenna 2 and the second antenna 3 is changed to the characteristic impedance of the feed line connected to the feed unit 21 of the first antenna and the feed unit 31 of the second antenna and the FM frequency outside Japan. The configuration is the same as that of the antenna according to the first embodiment except that the band is matched.

  The antenna of the present example is printed on the rear glass 1 with a conductive ceramic paste so that the width of each filament is 0.7 mm, dried, and then baked in a heating furnace, An AV line is attached to each of the power feeding portions 31 of the second antenna and then attached to the vehicle body. Then, the outer conductor of the coaxial cable was grounded at a ground point where a coaxial cable extending from a tuner (not shown) was provided on the vehicle body in the vicinity of each feeding point, and the core wire side of the coaxial cable was connected to the AV line.

  When the broadcast wave at the frequency of 88 to 108 MHz in the FM band outside Japan is received with the antenna of this embodiment created in this way, the first antenna 2 and the second antenna 3 are different as in the first embodiment. Directional characteristics were obtained, and it was found that it was at a practical level.

  Of course, the first antenna 2 and the second antenna 3 are adjusted by adjusting the lengths of the wires constituting the first antenna 2 and the second antenna 3 of the present embodiment and the connecting positions of the wires. If the input impedance of the power supply line is matched with the characteristic impedance of the feeder line in the frequency band in Japan, as in the case where this embodiment is adjusted to the frequency band outside Japan, in the frequency band in Japan, With the antenna of this embodiment, the effect of diversity reception can be obtained.

<Example 10>
FIG. 10 is a front view of an antenna pattern according to Example 10 of the present invention viewed from the vehicle exterior side. In the antenna of Example 10, the left end of the feeding line 211 of the first antenna and the feeding of the second antenna are respectively connected to the upper ends of the vertical strip 22 of the first antenna and the vertical strip 32 of the second antenna. The right end of the wire strip 311 is connected, extended to the right side and the left side, respectively, the feed section 21 is connected to the right end of the feed line strip 211 of the first antenna, and the second end is connected to the left end of the feed line strip 311 of the second antenna. The first and second antennas 2 and 2 are connected to each other by adjusting the lengths of the wires constituting the first antenna 2 and the second antenna 3 and the connecting positions of the wires. Except that the input impedance of the antenna 3 is matched with the characteristic impedance of the feeder connected to the feeder 21 of the first antenna and the feeder 31 of the second antenna in the FM frequency band outside Japan. ,Example The same configuration as that of the antenna.

  The antenna of the present example is printed on the rear glass 1 with a conductive ceramic paste so that the width of each filament is 0.7 mm, dried, and then baked in a heating furnace, An AV line is attached to each of the power feeding portions 31 of the second antenna and then attached to the vehicle body. Then, the outer conductor of the coaxial cable was grounded at a ground point where a coaxial cable extending from a tuner (not shown) was provided on the vehicle body in the vicinity of each feeding point, and the core wire side of the coaxial cable was connected to the AV line.

  When the broadcast wave at the frequency of 88 to 108 MHz in the FM band outside Japan is received with the antenna of this embodiment created in this way, the first antenna 2 and the second antenna 3 are different as in the first embodiment. Directional characteristics were obtained, and it was found that it was at a practical level.

  Of course, the first antenna 2 and the second antenna 3 are adjusted by adjusting the lengths of the wires constituting the first antenna 2 and the second antenna 3 of the present embodiment and the connecting positions of the wires. If the input impedance of the power supply line is matched with the characteristic impedance of the feeder line in the frequency band in Japan, as in the case where this embodiment is adjusted to the frequency band outside Japan, in the frequency band in Japan, With the antenna of this embodiment, the effect of diversity reception can be obtained.

<Example 11>
FIG. 11: is the front view seen from the vehicle outer side of the antenna pattern which concerns on Example 11 of this invention. In the antenna of Example 11, the right end of the first antenna feed line 211 and the second antenna feed are respectively provided at the upper ends of the first antenna vertical line 22 and the second antenna vertical line 32. The left end of the wire strip 311 is connected, extended to the left and right sides, respectively, the power feeding section 21 is connected to the left end of the power feed strip 211 of the first antenna, and the second end is connected to the right end of the power feed strip 311 of the second antenna. The first and second antennas 2 and 2 are connected to each other by adjusting the lengths of the wires constituting the first antenna 2 and the second antenna 3 and the connecting positions of the wires. Except that the input impedance of the antenna 3 is matched with the characteristic impedance of the feeder connected to the feeder 21 of the first antenna and the feeder 31 of the second antenna in the FM frequency band outside Japan. ,Example The same configuration as that of the antenna.

  The antenna of the present example is printed on the rear glass 1 with a conductive ceramic paste so that the width of each filament is 0.7 mm, dried, and then baked in a heating furnace, An AV line is attached to each of the power feeding portions 31 of the second antenna and then attached to the vehicle body. Then, the outer conductor of the coaxial cable was grounded at a ground point where a coaxial cable extending from a tuner (not shown) was provided on the vehicle body in the vicinity of each feeding point, and the core wire side of the coaxial cable was connected to the AV line.

  When the broadcast wave at the frequency of 88 to 108 MHz in the FM band outside Japan is received with the antenna of this embodiment created in this way, the first antenna 2 and the second antenna 3 are different as in the first embodiment. Directional characteristics were obtained, and it was found that it was at a practical level.

  Of course, the first antenna 2 and the second antenna 3 are adjusted by adjusting the lengths of the wires constituting the first antenna 2 and the second antenna 3 of the present embodiment and the connecting positions of the wires. If the input impedance of the power supply line is matched with the characteristic impedance of the feeder line in the frequency band in Japan, as in the case where this embodiment is adjusted to the frequency band outside Japan, in the frequency band in Japan, With the antenna of this embodiment, the effect of diversity reception can be obtained.

<Example 12>
FIG. 27 shows a side view and a rear view of the automobile 6 when the rear glass 1 provided with the antenna pattern according to the first embodiment of the present invention is attached to the rear gate 64 of the wagon type automobile 6. .

  In FIG. 27, FM broadcast waves are diversity-received by the first antenna 2 and the second antenna 3 that are the antennas according to the first embodiment of the present invention, and the AM broadcast waves for the side glass printed on the side glass 63 are received. The AM antenna wave is received by the glass antenna 7 for use. The first antenna 2 and the second antenna 3, which are antennas according to the first embodiment of the present invention, and the AM broadcast wave glass antenna 7 for the side glass are respectively connected to separate feed lines, and each feed line is an automobile. 6 is connected to a receiver (not shown).

  The side glass AM broadcast wave glass antenna 7 is provided at a feed point 71 of the side glass AM broadcast wave glass antenna and a side glass AM broadcast wave glass antenna disposed at the periphery of the side glass 63. It is comprised from the filament part 72 of the glass antenna for AM broadcast waves for the side glass connected.

  As the AM broadcast wave glass antenna 7 for the side glass, an AM broadcast wave glass antenna for a side glass that is generally used for a side glass of an automobile can be used.

  By adopting such a configuration, the AM broadcast wave antenna and the FM broadcast wave antenna can all be constituted by glass antennas, and the design of the automobile can be improved.

<Example 13>
FIG. 28 also shows a side view and a rear view of the automobile 6 when the rear glass 1 provided with the antenna pattern according to the first embodiment of the present invention is attached to the rear gate 64 of the wagon-type automobile 6. .

  However, in FIG. 28, the AM broadcast wave is different from that of the twelfth embodiment in that the AM broadcast wave is received by an AM broadcast wave antenna (not shown) built in the rear spoiler 65. The first antenna 2 and the second antenna 3 that are the antennas according to the first embodiment of the present invention and the AM broadcast wave antenna (not shown) built in the rear spoiler 65 are connected to separate feeding lines. Each feeder line is connected to a receiver (not shown) provided in the automobile 6.

  As an AM broadcast wave antenna (not shown) built in the rear spoiler 65, an antenna currently used in an automobile can be used.

  With this configuration, it is possible to receive not only FM broadcast waves but also AM broadcast waves.

  In the thirteenth embodiment, the antenna built in the rear spoiler 65 is used as the AM broadcast wave antenna. However, the AM broadcast wave antenna does not need to be built in the rear spoiler 65; It can be arranged at various places such as at the bottom of an automobile or at the roof of an automobile.

Although the preferred embodiment has been described above, the present invention is not limited to this, and various applications can be considered.

<Reference example>
FIG. 12 is a front view of an antenna pattern according to a reference example of the present invention as viewed from the vehicle outer side. The antenna of the present reference example is obtained by removing the second antenna 3 from the antennas of the first embodiment and leaving only the first antenna 2. The dimensions of the first antenna 2 of the present reference example are as follows. The dimensions of the first antenna 2 and the dimensions of the first antenna 2 in Comparative Example 1 are the same as in Example 1 when matched to the FM frequency band outside Japan. That is, the dimensions are as follows.

Rear glass 1 vertical width f = 500 mm
Rear glass 1 lateral width g = 1300 mm
The lateral distance b from the center line a of the rear glass 1 to the feeding portion 21 of the first antenna b = 140 mm
The distance between the upper edge of the flange 5 and the feeding portion 21 of the first antenna = 10 mm
Size of the feeding portion 21 of the first antenna: width X length = 22 mm X 10 mm
Length of vertical line 22 of the first antenna = 60 mm
The length of the horizontal line 23 of the first antenna = 240 mm
The length of the right side 23a from the connecting portion of the horizontal line 23 of the first antenna to the vertical line 22 of the first antenna = 90 mm
The length of the left side 23b from the connecting portion of the horizontal line 23 of the first antenna to the vertical line 22 of the first antenna = 150 mm
The distance d = 10 mm between the heating horizontal filament 42 at the top of the defogger 4 and the horizontal filament 23 of the first antenna
The antenna of this reference example is printed on the rear glass 1 with a conductive ceramic paste so that the width of each filament is 0.7 mm, dried, and baked in a heating furnace, to the power feeding unit 21 of the first antenna. Attach the AV line to the car body. Then, the outer conductor of the coaxial cable was grounded at a ground point where a coaxial cable extending from a tuner (not shown) was provided on the vehicle body in the vicinity of each feeding point, and the core wire side of the coaxial cable was connected to the AV line.

  When the broadcast wave in the frequency band of 76 to 108 MHz in the FM band inside and outside Japan was received with the antenna of this example created in this way, the results shown in FIGS. 21 to 22 were obtained.

  FIG. 21 shows the average value of the reception sensitivity of each frequency of 76 MHz to 108 MHz of the antenna of this reference example in all directions, and the solid line shows the measurement result of the first antenna 2.

  FIG. 22 shows a directional characteristic diagram regarding the reception sensitivity at 90 MHz of the antenna of this reference example, and the solid line shows the measurement result of the first antenna 2.

  The average value of the reception sensitivity in the 88 MHz to 108 MHz in the outer band of Japan of this reference example in FIG. 21 is the first indicated by the solid line when the dimensions are matched to the outer band of Japan in the first embodiment of FIG. It can be seen that the value is larger than the measurement result related to the antenna 2 and the measurement result related to the first antenna 2 indicated by the solid line in Comparative Example 1 in FIG.

  However, looking at the directivity characteristics at 90 MHz of this reference example in FIG. 22, the directivity characteristics are depressed at two locations indicated by arrows, and when the antenna dimensions are adjusted to the outer band of Japan in Example 1 in FIG. The measurement results for the first antenna 2 indicated by the solid line and the measurement results for the first antenna 2 indicated by the solid line of Comparative Example 1 in FIG. It can be seen that the directivity characteristic regarding the reception sensitivity is substantially the same as the directivity characteristic regarding the reception sensitivity of the first antenna 2 of the first comparative example 1 shown in FIG.

  Therefore, as in Comparative Example 1 in FIG. 13, the first antenna 2 of the present reference example is further provided with the second antenna feeding portion 31, the second antenna vertical stripe 32, and the second antenna horizontal stripe. If only the second antenna 3 composed of only 33 is added, when receiving FM broadcast waves with two antennas, the antenna is compared with the case of receiving with one antenna as in this reference example. As a result, there is a concern that the reception performance will deteriorate.

<Comparative Example 1>
FIG. 13 is a front view of the antenna pattern of Comparative Example 1, which is a comparative example according to Example 1 of the present invention, as viewed from the vehicle exterior side. The antenna of this comparative example is obtained by removing the first auxiliary filament 34 of the second antenna from the second antenna 3 of the antennas of the first embodiment whose dimensions are adjusted to the band outside Japan. This is the same as the antenna of the first embodiment. That is, the dimensions are as follows.

Rear glass 1 vertical width f = 500 mm
Rear glass 1 lateral width g = 1300 mm
The lateral distance b from the center line a of the rear glass 1 to the feeding portion 21 of the first antenna b = 140 mm
The lateral distance c from the center line b of the rear glass 1 to the feeding portion 31 of the second antenna c = 140 mm
The distance between the upper edge of the flange 5 and the feeding portion 21 of the first antenna = 10 mm
The distance between the upper edge of the flange 5 and the feeding portion 31 of the second antenna = 10 mm
Size of the feeding portion 21 of the first antenna: width X length = 22 mm X 10 mm
Length of vertical line 22 of the first antenna = 60 mm
The length of the horizontal line 23 of the first antenna = 240 mm
The length of the right side 23a from the connecting portion of the horizontal line 23 of the first antenna to the vertical line 22 of the first antenna = 90 mm
The length of the left side 23b from the connecting portion of the horizontal line 23 of the first antenna to the vertical line 22 of the first antenna = 150 mm
The distance d = 10 mm between the heating horizontal filament 42 at the top of the defogger 4 and the horizontal filament 23 of the first antenna
Size of the feeding portion 31 of the second antenna: width X length = 22 mm X 10 mm
Length of vertical line 32 of second antenna = 60 mm
Length of horizontal line 33 of second antenna = 170 mm
The distance d ′ = 10 mm between the heating horizontal filament 42 at the top of the defogger 4 and the horizontal filament 23 of the second antenna
The antenna of this comparative example is printed on the rear glass 1 with a conductive ceramic paste so that the width of each filament is 0.7 mm, dried, and baked in a heating furnace, to the power feeding unit 21 of the first antenna. Attach the AV line to the car body. Then, the outer conductor of the coaxial cable was grounded at a ground point where a coaxial cable extending from a tuner (not shown) was provided on the vehicle body in the vicinity of each feeding point, and the core wire side of the coaxial cable was connected to the AV line.

  When the broadcast wave at the frequency of 76 to 108 MHz in the FM band inside and outside Japan was received with the antenna of this comparative example created in this way, the results shown in FIGS. 23 to 24 were obtained.

  FIG. 23 shows the average value of the reception sensitivity in all directions of the antennas of 76 MHz to 108 MHz in this embodiment, the solid line is the measurement result of the first antenna 2, and the broken line is the second antenna 3. It is a measurement result.

  FIG. 24 shows a directional characteristic diagram regarding the reception sensitivity at 90 MHz of the antenna of the present embodiment. The solid line indicates the measurement result of the first antenna 2, and the broken line indicates the measurement result of the second antenna 3.

  From FIG. 24, it can be seen that the directivity characteristic regarding the reception sensitivity of the first antenna 2 and the directivity characteristic regarding the reception sensitivity of the second antenna 3 are similar to each other. It can be understood that when neither the second antenna 3 nor the second antenna 3 has the auxiliary filament, good diversity reception with respect to the FM broadcast wave cannot be performed.

<Comparative example 2>
FIG. 14 is a front view of the antenna pattern of Comparative Example 2, which is a comparative example according to Example 3 of the present invention, as viewed from the vehicle exterior side. In the antenna of this comparative example, the first auxiliary wire 24 of the first antenna is removed from the first antenna 2 of the antennas of the third embodiment, and the first antenna of the second antenna 3 is further removed from the second antenna 3. The auxiliary wire 34 is removed, and the other points are the same as those of the antenna of the third embodiment. That is, the dimensions are as follows.

Rear glass 1 vertical width f = 500 mm
Rear glass 1 lateral width g = 1300 mm
The lateral distance b from the center line a of the rear glass 1 to the feeding portion 21 of the first antenna b = 140 mm
The lateral distance c from the center line b of the rear glass 1 to the feeding portion 31 of the second antenna c = 140 mm
The distance between the upper edge of the flange 5 and the feeding portion 21 of the first antenna = 10 mm
The distance between the upper edge of the flange 5 and the feeding portion 31 of the second antenna = 10 mm
Size of the feeding portion 21 of the first antenna: width X length = 22 mm X 10 mm
Length of vertical line 22 of the first antenna = 60 mm
Length of horizontal line 23 of the first antenna = 90 mm
The distance d = 10 mm between the heating horizontal filament 42 at the top of the defogger 4 and the horizontal filament 23 of the first antenna
Size of the feeding portion 31 of the second antenna: width X length = 22 mm X 10 mm
Length of vertical line 32 of second antenna = 60 mm
Length of horizontal line 33 of second antenna = 170 mm
The distance d ′ = 10 mm between the heating horizontal filament 42 at the top of the defogger 4 and the horizontal filament 23 of the second antenna
The antenna of this comparative example is printed on the rear glass 1 with a conductive ceramic paste so that the width of each filament is 0.7 mm, dried, and baked in a heating furnace, to the power feeding unit 21 of the first antenna. Attach the AV line to the car body. Then, the outer conductor of the coaxial cable was grounded at a ground point where a coaxial cable extending from a tuner (not shown) was provided on the vehicle body in the vicinity of each feeding point, and the core wire side of the coaxial cable was connected to the AV line.

  When the broadcast wave at the frequency of 76 to 108 MHz in the FM band inside and outside Japan was received with the antenna of this comparative example thus created, the results shown in FIGS. 25 to 26 were obtained.

  FIG. 25 shows the average value of the reception sensitivity in each direction of 76 MHz to 108 MHz of the antenna of the present embodiment, the solid line is the measurement result of the first antenna 2, and the broken line is the second antenna 3. It is a measurement result.

  FIG. 26 shows a directional characteristic diagram of the reception sensitivity at 90 MHz of the antenna of the present embodiment, where the solid line is the measurement result of the first antenna 2 and the broken line is the measurement result of the second antenna 3.

FIG. 26 shows that the directivity characteristic for the reception sensitivity of the first antenna 2 and the directivity characteristic for the reception sensitivity of the second antenna 3 are similar to each other. It can be understood that when neither the second antenna 3 nor the second antenna 3 has the auxiliary filament, good diversity reception with respect to the FM broadcast wave cannot be performed.

DESCRIPTION OF SYMBOLS 1 Rear glass 2 1st antenna 21 Feeding part 211 of 1st antenna Feeding line 22 of 1st antenna Vertical line 22a of 1st antenna 1st of 1st antenna in vertical line of 1st antenna The upper part 22b from the connection point with the auxiliary line of the first antenna The lower part 23 from the connection point with the first auxiliary line of the first antenna in the vertical line of the first antenna The horizontal line 23a of the first antenna In the horizontal line of the first antenna, the right part 23b from the lower end of the vertical line of the first antenna 24b In the horizontal line of the first antenna, the left part 24 from the lower end of the vertical line of the first antenna 24 Auxiliary wire 3 Second antenna 31 Second antenna power supply 311 Second antenna power supply wire 32 Second antenna vertical wire 32a Second antenna vertical wire The upper portion 32b from the connection point with the first auxiliary line of the second antenna The lower portion 32a 'from the connection point with the first auxiliary line of the second antenna in the vertical line of the second antenna The upper portion 32b ′ from the connection point of the vertical line of the antenna to the second auxiliary line 32b ′ from the connection point of the vertical line of the second antenna to the second auxiliary line 33 The lower portion 33 of the second antenna Horizontal line 33a The second antenna horizontal line from the lower end of the second antenna vertical line to the left side 33b The second antenna horizontal line from the lower end of the second antenna vertical line to the right side part 34 Antenna first auxiliary wire 34 'second antenna second auxiliary wire 34'a second antenna second auxiliary wire bent portion 4 defogger 41 bus bar 42 heating horizontal wire 43 defogger Vertical wire 5 Flange upper edge 6 Wagon type automobile 61 Front door glass 62 Rear door glass 63 Side glass 64 Rear gate 65 Rear spoiler 7 AM broadcast wave glass antenna 71 for side glass AM broadcast wave glass antenna feed point 72 for side glass AM broadcast wave glass for side glass Antenna line portion a Rear glass center line b Distance between rear glass center line and first antenna feeding section c Distance between rear glass center line and second antenna feeding section d Heating line at top of defogger Spacing between horizontal stripes of strip and first antenna d 'Spacing of heating strip on top of defogger and horizontal strip of second antenna e Spacing between auxiliary strips or between auxiliary strip and horizontal strip f Vertical length of rear glass Directional width g Rear glass lateral width

Claims (8)

FM disposed in the upper margin of the defogger (4) of the rear glass (1) having a defogger (4) comprising a bus bar (41) and a plurality of heating wires (42) connected to the bus bar (41). In a vehicle glass antenna for diversity reception of broadcast waves,
It consists of two antennas (2, 3), a first antenna (2) for FM broadcast waves and a second antenna (3) for FM broadcast waves,
The first antenna (2) and the second antenna (3) are:
Power feeding portions (21, 31) respectively disposed on the upper end portion of the rear glass (1) so as to be separated from each other to the left and right;
Vertical wires (22, 32) that are connected to the power feeding section (21, 31) and hang down;
A horizontal line (23, 33) connected to the lower end of the vertical line (22, 32),
The horizontal filaments (22, 32) of the two antennas (2, 3) are respectively disposed close to the uppermost heating horizontal filament (42) of the defogger (4), Capacitively coupled to the uppermost heating horizontal filament (42),
Auxiliary filaments (24, 34, 34) for adjusting directivity are provided on at least one of the vertical filaments (22, 32) or the feeder (21, 31) of the two antennas (2, 3). ') A glass antenna for vehicles, characterized in that at least one is connected.   All or part of the auxiliary filaments (24, 34, 34 ') provided on the two antennas (2, 3) are connected to any one of the two antennas (2, 3). 2. The vehicle according to claim 1, wherein the distance (e) is 10 mm or more when the horizontal stripes (23, 33) overlapped with the distance (e) in the vertical direction. Glass antenna.   At least one auxiliary wire (24, 34, 34 ') is connected to each of the two antennas (2, 3), and the auxiliary wire (24, 34, 34') connected to each antenna. 34 ′), the auxiliary filaments (24, 34, 34 ′) extended in the center line direction (a) of the rear glass overlap with each other with a distance (e) in the vertical direction. (E) is 10 mm or more, The glass antenna for vehicles of Claim 1 or 2 characterized by the above-mentioned.   Auxiliary wires (24, 34, 34 ') for directivity adjustment are connected to at least one end of the horizontal wires (23, 33) provided on the two antennas (2, 3). The glass antenna for vehicles according to any one of claims 1 to 3 characterized by things.   A feeding section (21, 31) provided in at least one of the two antennas (2, 3) includes a feeding line (211 and 311) extending in a horizontal direction, and the feeding line ( 211, 311) is connected to the upper end of the vertical filament (22, 32) of the antenna, the glass antenna for vehicles according to any one of claims 1 to 4 characterized by things. .   6. An antenna system comprising: the glass antenna for a vehicle according to claim 1; and a vehicle (6) to which the glass antenna for a vehicle is attached, the antenna for AM broadcast waves.   The antenna system according to claim 6, wherein the AM broadcast wave antenna is a glass antenna (7) disposed in a side window of the vehicle (6). The antenna system according to claim 6, wherein the AM broadcast wave antenna is provided on a roof, a rear spoiler (65), or a bumper of the vehicle.