JPH0215701A - Window glass antenna for automobile - Google Patents

Abstract

PURPOSE:To obtain a quarter glass antenna having a small area by receiving radio waves by means of a loop-like slit between a conductive film and the body of the automobile provided on the surface of window glass. CONSTITUTION:This window glass antenna is constituted of a conductive film 2 which is provided on the surface of the quarter glass of an automobile and has plural holes 4a-4e in the film 2 and a feeder through which electricity is fed to the film 2. The conductor film 2 is formed so that a loop-like slit 3 can be formed between the film 2 and body 6 of the automobile. Received signals are fetched from both sides of the loop-like slit 3 between the conductive film 2 on the surface of the window glass and the body of the automobile. Since radio waves are received by means of the loop-like slit 3 in such way, influences are seldom received from the automobile body which is a conductor and the radio waves are received in an excellent state.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automobile window glass antenna that receives radio waves such as FM, VHF, and UHF'.

[Conventional technology]

FIG. 4 is a front view showing a conventional automobile window glass antenna disclosed in, for example, Japanese Unexamined Patent Publication No. 55-150602.
In the figure, (7) is the windshield, (8N-170
This is an antenna wire provided on the surface of the glass (7).

Since the conventional automobile window glass antenna is configured as described above, radio waves can be received by the antenna wire (8) provided on the surface of the window glass.

[Problem to be solved by the invention]

The above-mentioned conventional automobile window glass has a problem in that when the area is small, such as a quarter glass, good reception cannot be achieved because it is affected by the automobile body, which is a conductor.

The present invention was made to solve the above-mentioned problems, and an object of the present invention is to obtain a window glass antenna that can provide good reception even with a quarter glass having a small area.

[Means to solve the problem]

The automobile window glass antenna according to the present invention is adapted to receive received signals from both sides of a loop-shaped slit between the conductive film on the surface of the window glass and the body of the automobile.

[Effect]

The automobile window glass antenna of the present invention receives radio waves through a loop-shaped slit between the conductor film on the window glass and the body, so that good reception can be achieved without being affected by the automobile body, which is a conductor.

[Implementation-j]

Figure 1 shows one implementation of this invention F! FIG. 2 is a front view of the quarter glass shown in FIG.

In the figure, ... is a quarter glass, (21 is a conductor film provided on the surface of the quarter glass ..., (31 is a loop-shaped slit opened between the conductor film +21 and the body,
(4a), (+b), (+c) *(4a), (+e) are holes made in the conductor film +21, +61#'j coaxial line for taking out the received signal, (61 is the body of the car.

The windowpane antenna for a self-help vehicle of the present invention configured as described above is provided with a conductor and a membrane (21) provided on the surface of the quarter glass (21) on both sides of the loop-shaped slit between the vehicle body (6). Since radio waves are received as a potential difference and the received signal is guided to the receiver by the coaxial line 51, good reception is possible without being affected by the car body (6) which is a conductor. The outside scenery can be seen through the holes provided in Figure 8. Figure 8 is a front view of a quarter glass showing another embodiment of this invention. be. In this embodiment, the width of the loop-shaped slit between the conductive film and the body is made wider at the upper part than at the coaxial line +51.

As a result, the same resonant frequency as in FIG. 1 can be obtained by opening the top of the coaxial line (5). Furthermore, matching can be achieved by changing the input impedance viewed from the top and the impedance viewed from the bottom of the coaxial line 16).

〔Effect of the invention〕

As described above, according to the present invention, since radio waves are received by the loop-shaped slit between the conductive film provided on the surface of the window glass and the body, the radio waves are less affected by the conductive body of the automobile. It has the effect of providing a quarter glass antenna with a small area.

[Brief explanation of the drawing]

Fig. 1 is a front view of a quarter glass showing one embodiment of the present invention, Fig. 3 is a perspective view of an automobile incorporating a window glass antenna of one embodiment of the invention, and Fig. 8 is a front view of a quarter glass showing an embodiment of the present invention. FIG. 4 is a front view of a quarter glass showing an embodiment, and FIG. 4 is a front view of a conventional automobile window glass antenna. In the figure, ;l) is a quarter glass, (21 is a conductor film, +31 #-t loop-shaped slit, r4a) ~ (
418) Ti conductor film (2; hole, (6) is coaxial line,
161 is the body of the car. 6. In the figures, the same symbols indicate the same or equivalent parts.

Claims (1)

[Claims] It consists of a quarter glass of an automobile, a conductor film provided on the surface of the quarter glass with a plurality of holes inside, and a power supply line that feeds power to this conductor film. A windowpane antenna for an automobile, characterized in that it is configured to form a single loop-shaped slit between the antenna and the body.