JPH01254006A - Quarter window glass antenna for automobile - Google Patents

Abstract

PURPOSE:To improve the reception of signal by receiving a radio wave by a slit between a car body and a conductor provided onto a quarter glass face. CONSTITUTION:The conductor part 2 being a glass antenna imbedded on the surface of the quarter glass 1 of an automobile is in parallel with the left/right sides of the glass 1 and the upper end consists of the 1st and 2nd conductor parts 2a, 2b provided on the intermediate height of the glass 1 and the 3rd conductor part 2c connecting upper ends of both the conductor parts 2a, 2b. A radio wave is received in terms of a potential difference caused across the slit 3 between the conductor 2 imbedded on the quarter glass 1 and the car body 5 and a reception signal is led through a feeder 4 to a receiver. Thus, the radio wave is received excellently without being affected by the body 5.

Description

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

[Conventional technology]

FIG. 3 shows a conventional automobile window glass antenna disclosed, for example, in Japanese Patent Application Laid-open No. 55-150602. In the figure, 6 is the windshield of the automobile, and 7 is an antenna provided on the surface of the windshield 6. It is a line. The automobile window glass antenna configured as described above receives radio waves through the antenna wire 7.

[Problem to be solved by the invention]

Conventional window glass antennas configured as described above have a problem in that when the area is small, such as a quarter glass, it is difficult to receive good reception because the antenna is affected by the car body, which acts as a conductor.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to obtain a windowpane antenna for an automobile that can satisfactorily receive signals even on a quarter glass with a small area.

[Means to solve the problem]

In the automobile window glass antenna according to the present invention, the upper ends of the first and second conductor parts parallel to the left and right sides of the quarter glass are connected by a third conductor, and a feeder line is connected to the third conductor part. It is something.

[For production]

In this invention, radio waves can be received by the slit between the conductor part provided on the quarter glass surface and the car body, and thereby the radio waves are not affected by the body and can be well received. .

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
The figure shows a configuration diagram of a windowpane antenna for an automobile according to the present invention, and FIG. 2 shows an external view of an automobile incorporating the antenna.

Reference numeral 1 is a quarter glass of an automobile, and reference numeral 2 is a conductor portion embedded in the surface of this glass l, which becomes a glass antenna. This conductor part 2 is parallel to the left and right sides of the glass 1, and includes first and second conductor parts 2a and 2b whose upper ends are provided at an intermediate height of the glass 1, and both conductor parts 2a and 2b. It consists of a third conductor part 3C connecting the upper end part. 3 is the conductor part 2a, 2b
A slit 4 between the vehicle body 5 and the vehicle body 5 is connected to the third conductor portion 2c and serves as a feeder line for extracting the received signal.

The window glass antenna configured as described above receives radio waves as a potential difference generated on both sides of the slit 3 between the conductor 2 embedded in the quarter glass 1 and the car body 5,
The received signal is guided to the receiver by the power supply line 4, and the radio waves can be received without being affected by the body 5.

Furthermore, since the conductor 2 is approximately U-shaped, it does not obstruct the outside scenery. Furthermore, the above-mentioned glass antenna can be considered as a type of loop-shaped slit in which the width of the slit changes. By widening the slit width above the feed point, the area above the feed line 4 is left open. This reduces the total length of the antenna by half (creates an image).
This allows for efficient use of small spaces. Furthermore, since the input impedance seen above and the impedance seen below the feeder line 4 are different, matching with the feeder line 4 is easy to achieve.

Further, the slit below the power supply line 4 is cut in a U-shape to change the slit width in the middle of the slit. This increases the total length of the slit and lowers the resonant frequency.

Furthermore, by increasing the slit width, a wide band can be obtained, and by changing the slit width, matching can be achieved.

〔Effect of the invention〕

As explained above, according to this invention, radio waves are received by the slit between the conductor provided on the quarter glass surface and the body of the automobile, so that the radio waves are not affected by the body. Even if the glass is small, signal reception can be performed well.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of an automobile window glass antenna according to an embodiment of the present invention, FIG. 2 is an external view of an automobile incorporating the antenna, and FIG. 3 is a configuration diagram of a conventional automobile window glass antenna. . 1...Quarter glass, 2...Conductor part, 2a...
1st conductor part, 2b... 2nd conductor part, 2C... 3rd conductor part, 3... slit, 4... feeder line, 5...
...Body. Note that the same reference numerals in the figures indicate the same or equivalent parts. Agent Masuo Oiwa Figure 1 20: First conductor part 2b: Second conductor part 2C: Third conductor part 3 List 4: Power supply line Figure 2 Figures 6 and 33 Procedure amendment (voluntary) l Indication of the case Japanese Patent Application No. 63-82002 2 Name of the invention Automobile window glass antenna 3 Name of the person making the amendment Name (601) Mitsubishi Electric Corporation Representative Moriya Shiki 4 Agent 5 Subject of amendment 6 , Contents of the amendment (]) "3C" on page 3, line 15 of the specification is corrected to "2C". (2) "Body" on page 5, line 16 is corrected to "body."that's all

Claims (1)

[Claims] First and second conductor parts embedded in the quarter glass of an automobile, parallel to the left and right sides of the glass, and with their upper ends reaching an intermediate height of the quarter glass, and the upper ends of both conductor parts. A windowpane antenna for an automobile, comprising: a third conductor section for connecting the antenna; and a feeder line connected to the third conductor section for extracting a received signal.