Vehicle window glass antenna using transparent conductive film

Details Vehicle window glass antenna using transparent conductive film Vehicle window glass antenna using transparent conductive film

1987-12-17

1988-08-30

Sikes, William L.

Communications: radio wave antennas

Antennas

With vehicle

H01Q 132

Patent

active

047680377

ABSTRACT:
The invention relates to an antenna disposed on or in a vehicle window glass such as the rear window glass or the windshield of an automobile to receive FM radio and/or TV broadcast waves. A principal element of the antenna is a transparent and conductive film in the shape of a quadrilateral having a horizontal upper side. The conductive film occupies a major and central area of the window glass at a distance not less than 15 mm from each edge of the glass. A feeding bar formed of a strip of a low-resistivity material is attached to the conductive film so as to extend horizontally along at least a portion of the upper side of the conductive film, and a lead connects the feeding bar to a feeding point on the window glass. A good position of the junction point of the lead and the feeding bar is in the middle of the width of the window glass. When the feeding point and the junction point are in a side marginal region of the window glass it is desirable to provide, as an auxiliary antenna element, a conductive strip which extends above and parallel to the feeding bar from the side marginal region to a central region of the glass and is connected to the feeding bar in the side marginal region.

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