JPH06188616A - On-vehicle antenna - Google Patents

Abstract

PURPOSE:To obtain the improved reception gain by using an outer wall cover of a high-mount stop lamp so as to mount the antenna thereby compensating a space made narrow through the provision of the high-mount stop lamp. CONSTITUTION:A single glass plate is mounted to an opening as a rear window glass 1 of an automobile and a high-mount stop lamp 2 is provided on the window glass. A roof shaped wire antenna 4 is formed in advance to a rear side of an insulation outer package cover 3 of the high-mount stop lamp. A glass antenna 6 for receiving a TV broadcast wave and an FM radio broadcast is provided an upper space of a defrosting heater wire 5, a glass antenna 7 for the TV broadcast wave and a glass antenna 8 for the keyless entry system are formed in a lower space of the defrosting heater wire 5 other places than the place of the window glass where the high-mount stop lamp is provided. Furthermore, A filter 9 comprising a capacitor and a coil is inserted to a power supply side of the high-mount stop lamp.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle antenna using a high mount stop lamp provided on a window glass.

[0002]

2. Description of the Related Art High-mount stop lamps, which have been legalized in North America and the like, tend to be increasingly adopted in automobiles in Japan. On the other hand, the rear window glass is of course an antenna for FM radio broadcast waves. , TV broadcast wave VHF band,
There is a tendency to provide multi-system glass antennas such as TV broadcast wave UHF band, and even an antenna for keyless entry.

In addition, since the rear window glass is provided with a heating strip for anti-fogging and occupies most of the area, the space for installing the glass antenna is reduced, and some window glasses are saturated with the glass antenna. In particular, if a high-mount stop lamp is installed on the rear window glass, it is safer and more aesthetically pleasing to install a glass antenna for the wire on at least that position because the wire is visible to the following vehicles. Since this is not preferable, it cannot be provided substantially, and the space of the glass antenna is further limited.

The present invention has been made in view of the above circumstances, and when a high mount stop lamp is provided on a rear window glass, an antenna for a vehicle that at least supplements the space of the glass antenna narrowed for that reason is provided. The purpose is to provide.

[0005]

The present invention is characterized in that a wire antenna is provided on the back surface or the bottom surface of an insulating exterior cover of a high mount stop lamp provided on a vehicle rear window glass. It is preferable that the linear antenna has a loop shape, a horizontal linear shape in which both ends are folded back, and the like.

[0006]

[Effect] Even if there is a cover on the front surface of the insulating exterior cover of the high mount stop lamp, it is unfavorable for safety and aesthetics to install a linear antenna at that location, which is not preferable for safety and aesthetic reasons. By installing a linear antenna on the outer cover on the bottom, this drawback is eliminated, and since it is narrow in location as a linear antenna, the total length can be increased by looping it or by folding both ends of the horizontal filament. And enables reception of FM radio broadcast waves or TV broadcast waves,
When receiving FM radio broadcast waves of 76 MHz to 90 MHz, the total length is 1200 mm to 1600 mm,
When receiving TV broadcast wave VHF band of 1 to 12 channels, 900 mm to 1500 mm, 660 MHz to 77
30 when receiving the 0 MHz TV broadcast wave UHF band
It may be appropriately selected within the range of 0 mm to 1000 mm.

If nothing is inserted into the power source side of the high mount stop lamp, noise generated when the high mount stop lamp is turned on and off may enter the receiver side through the antenna. By providing a noise filter on the power supply side of the lamp, it is possible to reduce the noise generated when the high mount stop lamp is turned on and off.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the drawings. 1 to 3 are views showing a vehicle antenna according to a first embodiment, FIG. 1 is a partial sectional view, FIG. 2 is a front view of essential parts, FIG. 3 is a perspective view showing only a high mount stop lamp, and FIG. FIG. 8 is a perspective view showing only a high mount stop lamp in the second embodiment.

Embodiment 1 As shown in FIGS. 1 to 3, a single plate glass is attached to an opening as a rear window glass 1 of an automobile, and a high mount stop lamp 2 is provided on the window glass. On the back surface of the insulating outer cover 3, the loop-shaped linear antenna 4 is formed in advance by a method such as screen printing.

In addition to the place where a high mount stop lamp is installed on the window glass, a glass antenna 6 for receiving FM radio broadcasting waves and TV broadcasting waves in the upper margin of the anti-fogging heating wire 5, heating for anti-fogging TV in the lower margin of line 5
A glass antenna 7 for receiving broadcast waves (VHF band, UHF band) and a glass antenna 8 for a keyless entry system are formed by a screen printing method.

A filter 9 composed of a condenser and a coil is provided on the power source side of the high mount stop lamp.
Insert. The loop-shaped linear antenna thus obtained has a horizontal length of 420 mm and a vertical length of 10 mm.
660MHz-770MHz TV depending on
When expressed as a gain difference (hereinafter, abbreviated as dipole ratio) when the reception gain of a standard dipole antenna is set to 0 dB by receiving radio waves in the broadcast wave UHF band, an average value is -155.3.
Since the reception gain of the ordinary glass antenna for receiving the UHF band is about -18 dB, it can be seen that the antenna is a good antenna exceeding this.

Further, no noise was generated even if the high mount stop lamp was turned on and off while receiving radio waves in the TV broadcast wave UHF band. This antenna can be received by itself, but in the case of this example,
It is more preferable to perform diversity reception with the glass antenna 6 and the glass antenna 7.

Embodiment 2 As shown in FIG. 4, the wire antenna has the same structure as that of Embodiment 1 except that the pattern of the linear antenna is formed by folding back both ends of the horizontal linear wire.

The wire antenna has a horizontal length of 600 mm, one vertical length of 10 mm, the other vertical length of 5 mm, one folded horizontal length of 600 mm, and the other folded horizontal length of 200 mm. 76MHz ~ 90M
When receiving radio waves of FM radio broadcasting waves of V. Hz, TV broadcasting waves of VHF band 1 to 3 channels, and TV broadcasting waves of VHF band 4 to 12 channels and showing them by a dipole ratio, average values of -16.3 dB and -16. 5 dB, -17.2,
The reception gain of a normal glass antenna is -18d.
B, -19 dB, and -19 dB, so good results exceeding these were obtained.

Although this antenna can receive alone, in the case of this example, it is more preferable to perform diversity reception with the glass antenna 6 and the glass antenna 7. The preferred embodiments have been described above, but the present invention is not limited to these, and various applications are possible.

Regarding the linear antenna, a loop-shaped antenna and a horizontal linear antenna with both ends folded back are preferable in that the total length can be increased. However, in addition to these shapes, a high mount antenna is particularly preferable. In the case where the stop lamp has a long horizontal length, for example, only one horizontal wire may be provided. In this case, a wire antenna may be provided on the bottom surface of the exterior cover in addition to the back surface. Further, it is preferable that the linear antenna is provided on the outside of the exterior cover in terms of drawing out work, but it may be provided on the inside. Further, the wire antenna may be directly attached to the insulating outer cover, or an insulating sheet to which a metal wire such as copper is attached may be bonded to the outer cover.

It is preferable that the mounting position of the high mount stop lamp is higher because the reception gain of the linear antenna is generally higher, but it may be mounted on a lower rear parcel or directly on the rear window glass. .

[0018]

The vehicle antenna of the present invention compensates for the narrow space for providing the high mount stop lamp by utilizing the exterior cover of the high mount stop lamp, and is equal to or exceeds the ordinary glass antenna. The reception gain can be obtained.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing a vehicle antenna according to a first embodiment of the present invention.

FIG. 2 is a front view of a main part of the vehicle antenna according to the first exemplary embodiment.

FIG. 3 is a perspective view showing only a high mount stop lamp in the first embodiment.

FIG. 4 is a perspective view showing only a high mount stop lamp according to a second embodiment.

[Explanation of symbols]

 1 Rear window glass 2 High mount stop lamp 3 Insulating outer cover 4 Wire antenna 5 Heating wire for anti-fog 6, 7, 8 Glass antenna 9 Filter

Claims (3)

[Claims] 1. A vehicle antenna, wherein a wire antenna is provided on a back surface or a bottom surface of an insulating exterior cover of a high mount stop lamp provided on a vehicle rear window glass. 2. The vehicle antenna according to claim 1, wherein the linear antenna is formed in a loop shape. 3. A vehicle antenna, wherein the linear antenna is formed by folding both ends of a horizontal linear line.