JPH10126131A - Vehicle-use glass antenna - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provided the vehicle-use glass antenna, in which a reception gain is enhanced over the entire TV broadcast wave and turning for each of two systems of antennas is facilitated respectively. SOLUTION: In the vehicle-use glass antenna, consisting of conductor wires extended from a couple of feeders 4, 5 provided in the vicinity of a vehicle side window glass pane one antenna 2 has at least the conductor wire extended horizontally from nearly the middle part of a side to other side, and the other antenna 3 is provided at least with a conductor wire extended almost the entire circumference of four sides at an internal of 10-60mm from a metallic body, the one antenna is turned to TV broadcast waves for 4th-12th channels, and the other antenna is turned to the TV broadcast waves of 1st-3rd channels.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glass antenna provided on a side window glass of a vehicle such as an automobile, and more particularly to a glass antenna provided with a glass antenna.
The present invention relates to a glass antenna suitable for receiving V broadcast waves.

[0002]

2. Description of the Related Art Conventionally, as a glass antenna for a vehicle, an antenna in which a conductive wire is provided in an upper margin portion or a lower margin portion of a conductive wire for heating a rear window glass, and a conductive wire is provided in a front window glass. Provided antennas are known and have been put into practical use, but in the former case, the space occupied by the antenna is small because the space is originally small and the view may be obstructed. No gain was obtained.

Further, the antenna provided on the front windowpane has a relatively high reception gain, but there is a restriction on a mounting place beyond that of the rear windowpane so as not to hinder the driver's view.
Accordingly, due to the widespread use of RVs equipped with side windows having relatively large areas and relatively small area windows, antennas provided on the side windows have been attracting attention. Japanese Utility Model Application Laid-Open No. 58-61509 for performing diversity reception by providing a pair of antennas on a window glass
Japanese Patent Laid-Open No. 61-265904, in which two antennas are provided on at least one side window glass and one is arranged clockwise and the other is arranged counterclockwise, a pair of feeding parts are separated from each other. No. 61-197710, in which an antenna line extending in the vertical direction from the power supply unit is provided, and two systems of antennas are provided over almost the entire area of the side window glass.
Numerous applications such as 197712 have also been filed.

[0004]

However, Japanese Utility Model Application Laid-Open No. 58-61509 discloses diversity reception using antennas on the right and left side window glasses.
76MHz because it is received by the system antenna
Up to 90 MHz FM radio broadcast wave, TV broadcast wave band of 1 to 3 channels (hereinafter abbreviated as VHF-L band), 4 to
It is difficult to receive a very wide range of radio waves in a 12-channel TV broadcast wave band (hereinafter abbreviated as VHF-H band).

Japanese Patent Application Laid-Open Nos. 61-265904, 61-197710, 61-197712, and 61-197712 show two antennas for receiving TV broadcast waves. Is one of the antennas on the lower side only,
Since the two systems of antennas extend at most along two sides, it is generally difficult to obtain a sufficient reception gain, let alone from FM radio broadcast waves to TV broadcast waves VHF.
It is difficult to obtain a high reception gain over the entire band.

[0006] The present invention has been made in view of the above points, and it is possible to increase the reception gain over the entire UHF band from an FM radio broadcast wave to a TV broadcast wave, and to easily tune each antenna. An object of the present invention is to provide a glass antenna for a vehicle.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a vehicle comprising a conductive wire extending from a pair of power supply portions provided near a side window glass for a vehicle. In the glass antenna, when the feeding portion is provided on a side portion (including a corner portion) above or below the center portion of the side portion, each extends to the same side along the side portion,
One of the antennas has at least a conductive line extending horizontally from a substantially central portion of the side to the other side, and the other antenna has a distance of 10 mm to 60 mm from the metal body and extends over substantially the entire circumference of the four sides. In the case where the feeding portion is provided near the center of the side, one of the antennas is a conductive wire extending horizontally from the feeding portion substantially at the center of the side to the other side. And the other antenna has a distance of 10 mm from the metal body.
導電 60 mm and at least a conductive wire extending over substantially the entire four sides. In each case, one antenna is tuned to the TV broadcast VHF band-H band, and the other antenna is tuned to the TV broadcast wave VHF-. The antenna is tuned to the L band, and the distance from the metal body of the other antenna is set to 20 mm to 40 mm.
More preferably, it is within the range of mm.

[0008] Further, the antenna having such a configuration is provided on the left and right side windowpanes, and diversity reception is performed by each antenna when receiving a TV broadcast wave, or the antenna having such a configuration is provided on one side windowpane. Provided,
Further, it is preferable to provide an antenna tuned to the TV broadcast wave VHF-L band and the TV broadcast wave VHF-H band on the rear window glass or the front window glass, and to perform diversity reception since diversity reception with different directional characteristics can be performed.

In the two-system antenna of the present invention, one of the antennas is constituted by a conductive wire extending from the substantially central portion of the side to the other side, so that the horizontal wire extends substantially at the central portion, which is the main element. With this configuration, it is possible to reduce the decrease in the reception gain due to the influence of the metal body on the TV broadcast wave.
It is necessary to secure a length sufficient for receiving the FH band, for example, a resonance length of λα / 2 (λ is the wavelength of a received radio wave, α is a wavelength shortening rate and about 0.7). Yes, FM radio broadcast waves tend to be more susceptible to the effects of metal bodies than TV broadcast waves. However, since this antenna is sufficiently far away from the body, it is possible to receive FM radio broadcast waves appropriately. it can.

The other antenna has a distance of 10 mm to 60 mm from the metal body and a distance of 10 mm or more between the conductive wire extending almost all around the side and the body. Since the total length is sufficiently long, the TV broadcast wave VHF-L band can be suitably received, and further, it is sufficiently separated from one antenna so as not to interfere with each other. Even if the length of the antenna is adjusted, it hardly affects the other antenna, so that the respective tunings can be easily performed.

Further, one of the patterns is set to a pattern suitable for the VHF-H band, the band is tuned to this band, and the other is set to the VHF-H band.
A conventional antenna in which the average reception gain is increased over a wide range from the VHF-L band to the VHF-H band for each of the two antennas because the pattern is tuned to a pattern suitable for the L band. Compared to V
At the time of HF-L band reception, the gain of the antenna tuned to the VHF-L band is naturally higher, and at the time of VHF-H band reception, the antenna tuned to the VHF-H band naturally has a higher reception gain.

Further, one of the antennas and the other antenna of the present invention are antennas tuned to the VHF-H band and the VHF-L band, respectively, and both of these antennas have a reception gain for the TV broadcast wave UHF band. Since it is high, when diversity reception is performed by two antennas provided on either the left or right side window glass or four antennas provided on both the left and right side window glass, this band can be received at a sufficiently practical level.

However, the two systems of antennas provided on the same side window glass do not necessarily have the same directional characteristics, but tend to be similar. Therefore, even if the antenna patterns have the same configuration, they are provided on the left and right side window glass. Taking advantage of the fact that the directional characteristics are different, two antennas having such a configuration are provided on the left and right side window glasses, and four antennas are used. At the time of band reception, it is preferable to compensate for the similarity of the directional characteristics by performing diversity reception between the other antennas.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A feed section from two TV broadcast wave receiving antennas according to the present invention is provided at a portion along either side of a side window glass, that is, at either the upper or lower side of the window glass. It is placed close to the point from one corner to the center of the side of the window glass.

[0015] When one of the antennas is provided with a feed portion at a corner or between the corner and the center,
It may be tuned to the TV broadcast wave VHF-H band as a structure extending directly or through a short horizontal line along the side to almost the center of the side and extending horizontally from the center. Is λα / 2 (1 ± 0...) When the wavelength of the reception frequency is λ and the wavelength reduction ratio is α.
Tuning may be performed within the range of 3).
Tuning may be performed between 0 mm and 500 mm (limited by the size of the window glass).

In this case, the conductive wire extending horizontally from the center to the vicinity of the other side is 50 mm from the center line CL connecting the center of the right side and the center of the left side or from the center.
It is preferable from the viewpoint of design that it is provided substantially in parallel with this line within the range of the degree, but it may be inclined in a range that does not matter in design.

The other antenna is spaced from the metal body at a distance of 10 mm to 60 mm, preferably 20 mm to 40 mm, and extends almost all around four sides, and may be tuned to the TV broadcast wave VHF-L band.

The antenna of the present invention can be used by being provided on one of the left and right side windowpanes. However, the antenna of the present invention (the left and right windowpane antennas are completely May be the same pattern, but may be different patterns within the scope of the present invention)
Alternatively, one side window glass is provided with an antenna having the configuration of the present invention, and the other side window glass is provided with two systems of TV broadcast wave receiving antennas having a configuration different from the configuration of the present invention. It is preferable to receive diversity. In this case, when receiving TV broadcast waves, diversity reception is performed by two antennas provided on the left and right window glasses, that is, four antennas. When receiving the VHF-L band, VHF-L of the left and right window glasses is received. Switching to one of the two antennas tuned to the band, which is essentially diversity reception by two antennas. When receiving the VHF-H band, which of the two antennas is tuned to the VHF-H band on the left and right windowpanes , And since the reception is substantially diversity reception by two antennas, the left and right antennas tuned to the VHF-L band when receiving the VHF-L band,
At the time of VHF-H band reception, diversity reception may be performed using left and right antennas tuned to the VHF-H band, that is, two antennas.

An antenna having the structure of the present invention is provided on one side window glass, and a TV broadcast wave receiving antenna provided on the other front or rear window glass or a pole antenna such as a whip antenna. Diversity reception may be performed.

The feeder of the two-system antenna can use any one of the corners. However, since the upper corner has a high receiving gain to receive TV broadcasts,
preferable.

Further, it is preferable that two power supply portions of the two systems of TV broadcast wave receiving antennas are provided close to each other so that connection work can be performed at one place. If so, it is of course possible to separate them.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings. FIGS. 1 to 6 are front views showing Examples 1 to 6 in which the glass antenna of the present invention is provided on one side window glass, respectively, as viewed from the inside of the vehicle.

Embodiment 1 As shown in FIG. 1, two T-systems of the present invention are provided on the inner surface of a glass sheet 1 mounted on one side window glass for a vehicle.
V broadcast wave receiving antennas 2 and 3 and respective feeding units 4
And 5 are provided between the corner and the center of the right side.

[0024] The glass sheet 1 to be attached to one of the side window glass, horizontal strip 2 ₁ of 40mm length, length 130
mm of vertical strip 2 _2, length 420mm horizontal strip 2 ₃ constituted VHF-H band tuned the one of the antenna 2 and its feed section 4 of length 30mm horizontal strip 3 _1, long Vertical line 3 ₂ with a length of 210 mm (a distance of 40 mm from the metal body, a distance of 95 m from the right edge of the window glass)
m), spacing 30mm in length with horizontal strip 3 ₃ (metal body 450 mm, distance between the window glass lower edge 55m
m), vertical filaments 3 _{4 with} a length of 300 mm (a distance of 30 mm from the metal body, a distance of 75 m from the left edge of the window glass)
m), distance 45m between the distance 20 mm, the window glass upper edge of the horizontal strip ₃₅ (metal body of 440mm length
m), the other antenna 3 tuned to the VHF-L band and the power supply unit 5 are screen-printed before bending and fired simultaneously with the bending.

The dimensions of the sheet glass 1 thus obtained were A ₁ = 600 mm, A ₂ = 610 mm, and B ₁ = 400 m.
m, B ₂ = 460 mm, mounted on the side window glass of a car, and 76 MHz by antennas 2 and 3 of the present invention.
Up to 90 MHz FM radio broadcast wave, VHF-L band, VH
F-H band, 470MHz to 770MHz TV broadcast wave U
When an HF band (hereinafter abbreviated as UHF band) is received and a reception difference of a standard dipole antenna is set to 0 dB and expressed as a gain difference (hereinafter abbreviated as dipole ratio), antenna 2 has an average value. -22.1 dB, -20.
8 dB, -17.7 dB and -18.9 dB, and the average of the antenna 3 is -26.2 dB and -18.5, respectively.
dB, −22.3 dB, −20.9 dB, and VHF
It can be seen that the antenna 2 is a good antenna for the −H band and the antenna 3 is a good antenna for the VHF-L band. Also,
It can be seen that each antenna is a good antenna for the UHF band and antenna 2 is a good antenna for FM radio broadcast waves.

Therefore, in practice, the antenna of the present invention is provided on the left and right side window panes, and when receiving the TV broadcast wave VHF-L band, the TV broadcast wave V on the left and right side window panes is received.
When the TV broadcast wave VHF-H band is received by one of the antennas tuned to the HF-L band, VHF
-By other antennas tuned to H band,
When receiving the UHF band of TV broadcast waves, it is preferable to perform diversity reception using four antennas provided on the left and right side windowpanes or one antenna provided on the left and right side windowpanes.

Also, since the antenna 2 can obtain a sufficient reception gain as an antenna for diversity reception especially for FM radio broadcast waves, it is preferable to perform diversity reception with a pole antenna or the like.

Embodiments 2 to 6 Embodiments 2 to 4 shown in FIGS. 2 to 4 are examples in which the power supply section is provided at substantially the same position as in the embodiment 1, and Embodiment 5 shown in FIG. 6 shows an example in which the power supply section is provided at the upper corner of the right side, and Example 6 shown in FIG. 6 shows an example in which the power supply section is provided substantially in the center of the side. It is provided in.

In the second embodiment, the tip of one of the antennas 2 is folded back to form a horizontal line 2 ₄ (horizontal line 2 ₃₎ having a length of 400 mm.
Adding spacing 10 mm) with, which tip the folded length of the other antenna 3 are added the horizontal strips 3 ₆ 440 mm, other antenna configuration is obtained by substantially the same as in Example 1.

In the third embodiment, one antenna 2 has an auxiliary element 2 'having a length of 100 mm, and the other antenna 3 has an auxiliary element having a vertical line having a length of 200 mm and a horizontal line having a length of 200 mm. The antenna is almost the same as the antenna of the first embodiment except that 3 'is added.

In the fourth embodiment, the folded portion 2 ₂ (having a length of 100
mm with two vertical lines connected by a horizontal line having a length of 10 mm).
The other antenna 3 has a length of 200 mm as in the third embodiment.
And an auxiliary element 3 'composed of a vertical line and a horizontal line having a length of 200 mm.

In the fifth embodiment, the feeder 4 and the feeder 5 are provided at the upper right corner, and extend directly along the right side edge of the window glass without passing through a horizontal line. 150mm length of the strip 2 _1, a vertical strip 3 ₁ length of the other antenna 3 with a 300 mm, horizontal strip 3 _4, 3 ₄ 'double structure and to the length of each interval 10mm tip It was 500 mm.

The sixth embodiment is an example in which the power supply unit 4 and the power supply unit 5 are provided substantially at the center of the right side. The length of the horizontal stripe 21 of _one antenna 2 is 470 mm, and the length of the other antenna 3 is vertical. the length of the linear 3 ₁ with a 180 mm, length on one of the antenna 2 is a horizontal streak with the length of 420 mm 1
An auxiliary element 2 'having a vertical line of 5 mm is added, and an auxiliary element 3' having a length of 420 mm is added to the other antenna 3 respectively.

Each of the antennas obtained in this manner is the same as that of the second embodiment, the third embodiment,
The antennas of the fourth and sixth embodiments use the TV broadcast wave VHF-H.
In the band, a reception gain slightly higher than that of the first embodiment is obtained, and the same performance is obtained for radio waves in other bands. In the fifth embodiment, almost the same performance is obtained for radio waves in all bands. Was done.

As for the other antenna, T
A reception gain slightly higher than that of the first embodiment was obtained with respect to the V broadcast wave VHF-L band radio wave, and equivalent results were obtained with respect to other band radio waves.

[0036]

As described above, the glass antenna of the present invention is an antenna provided on the side window glass, and the two antennas are arranged so as not to interfere with each other.
Tuning is easy, and one antenna is tuned to the VHF-H band, and the other antenna is tuned to the VHF-L band. When the antenna of the present invention is provided on the left and right side window glasses and receives diversity, the dip can be completely compensated for using the difference in directivity due to the difference between the left and right.

A similar effect can be obtained by providing the antenna of the present invention on one side portion and performing diversity reception with another antenna provided on the front window glass or the rear window glass, or with a pole antenna. it can.

[Brief description of the drawings]

FIG. 1 is a front view in which an antenna according to a first embodiment is disposed on one side window glass when viewed from inside a vehicle.

FIG. 2 is a front view showing Embodiment 2 in which the glass antenna of the present invention is provided on one side window glass for an automobile.

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

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

FIG. 5 is a front view showing a fifth embodiment in which the glass antenna of the present invention is provided on one side window glass for an automobile.

FIG. 6 is a front view showing a sixth embodiment in which the glass antenna of the present invention is provided on one side window glass for an automobile.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 sheet glass 2, 3 TV broadcast wave receiving antenna 2 ′, 3 ′ auxiliary element 4, 5 feeder of the present invention

Claims (5)

[Claims] 1. A vehicle glass antenna comprising conductive wires extending to a same side along a side of a window glass from a pair of power supply portions provided near a side window glass for a vehicle. Has at least a conductive wire extending from a substantially central portion of the side to the other side, and the other antenna has a distance of 10 mm to 60 mm from the metal body.
mm and at least a conductive wire extending over the entire circumference of four sides, one of the antennas is tuned to a TV broadcast wave in channels 4 to 12, and the other antenna is tuned to a TV broadcast wave in channels 1 to 3. A glass antenna for a vehicle, characterized in that: 2. A vehicle glass antenna comprising a conductive wire extending from a pair of power supply portions provided near a center of a side window glass side of a vehicle. The other antenna has at least a conductive wire extending horizontally from the central feeding portion to the other side, and the other antenna has at least a conductive wire extending from the metal body at a distance of 10 mm to 60 mm over substantially the entire four sides. And one of the antennas is set to T in channels 4 to 12.
A glass antenna for a vehicle, wherein the glass antenna is tuned to a V broadcast wave and the other antenna is tuned to a TV broadcast wave in channels 1 to 3. 3. A glass antenna for a vehicle according to claim 1, wherein a distance between the other antenna and the metal body is set to 20 mm to 40 mm. 4. The antenna according to claim 1, wherein the antenna according to claim 1 or 2 is provided on the left and right side window glasses, and diversity reception is performed by each antenna when receiving a TV broadcast wave. Glass antenna for vehicles. 5. A rear window glass or a front window glass,
3. A glass antenna for a vehicle, wherein antennas tuned to TV broadcast waves on three channels and TV broadcast waves on channels 4 to 12 are provided to receive diversity with the antenna according to claim 1 or 2.