JPH0394814U

JPH0394814U -

Info

Publication number: JPH0394814U
Application number: JP250790U
Authority: JP
Priority date: 1990-01-16
Filing date: 1990-01-16
Publication date: 1991-09-27

Description

[Brief explanation of drawings]

第１図は本考案を適用した自動車窓用アンテナ
装置を示すリア窓ガラスの導電パターン及び電気
系統の図、第２図は第１図のツイストペア給電線
にアース線を加えた例を示す図、第３図は専用ア
ンテナ導体をヒータ線の上部余白に設けた実施例
を示す図、第４図は第１図の例と従来例との受信
感度のばらつきを示すグラフである。なお図面に用いた符号において、１……リア窓
ガラス、２……ヒータ線、３ａ，３ｂ……母線、
４……中継母線、５ａ，５ｂ……給電線、６ａ，
６ｂ……チヨークコイル、７……カツプリングコ
ンデンサ、８……同軸ケーブル、９……アンテナ
導体、１０……アース線、である。 Fig. 1 is a diagram of a conductive pattern and electrical system of a rear window glass showing an automobile window antenna device to which the present invention is applied; Fig. 2 is a diagram showing an example in which a ground wire is added to the twisted pair power supply line of Fig. 1; FIG. 3 is a diagram showing an embodiment in which a dedicated antenna conductor is provided in the upper margin of the heater wire, and FIG. 4 is a graph showing variations in reception sensitivity between the example of FIG. 1 and the conventional example. In addition, in the symbols used in the drawings, 1... rear window glass, 2... heater wire, 3a, 3b... bus bar,
4...Relay bus bar, 5a, 5b...Feeder line, 6a,
6b...Chiyoke coil, 7...Coupling capacitor, 8...Coaxial cable, 9...Antenna conductor, 10...Ground wire.

Claims

[Scope of Claim for Utility Model Registration] A heater conductor attached to a windshield of an automobile for defogging purposes, a pair of power supply lines extending from a power source to supply heating current to the heater conductor, and the pair and a pair of chiyoke coils that are inserted into the feeder line of the heater to have a high impedance in the RF band, and the pair of feeder wires between the heater conductor and the chiyoke coil are twisted pair wires, and radio wave reception power is received from the heater wire. An automobile window antenna device characterized in that it can be taken out.