Communications: radio wave antennas – Antennas – With vehicle
Patent
1996-09-27
1998-05-26
Hajec, Donald T.
Communications: radio wave antennas
Antennas
With vehicle
343725, 343742, H01Q 132
Patent
active
057573280
ABSTRACT:
A vehicle windowpane antenna comprises a first windowpane antenna element and a second windowpane antenna element which cooperate to perform diversity receiving of a VHF band signal and a UHF band signal. Each of the first and second windowpane antenna elements includes a VHF double-loop antenna pattern portion including two loops consisting of two conductive wires with connecting ends, the two loops being attached to a windowpane with their connecting ends connected with each other, a feeder portion provided at the connecting ends of the VHF double-loop antenna pattern portion, and connected to a feeder line, capacitive coupling portions each including a pair of conductors respectively extending from intermediate portions of the loops of the VHF double-loop antenna pattern portion such that the conductors are opposed to each other and can form a short circuit within the VHF double-loop antenna pattern portion in a high frequency state, and a device for setting the electrostatic capacitance of each of the capacitive coupling portions, such that the capacitive coupling portions are not conductive when a VHF band signal is received, and conductive in a high frequency state when a UHF band signal is received.
REFERENCES:
patent: 2923813 (1960-02-01), Davis
patent: 2972145 (1961-02-01), Watts
patent: 3007164 (1961-10-01), Davis
patent: 4433336 (1984-02-01), Carr
patent: 4804968 (1989-02-01), Ohe et al.
patent: 4987423 (1991-01-01), Bouko et al.
patent: 5285210 (1994-02-01), Sato et al.
patent: 5402134 (1995-03-01), Miller et al.
patent: 5442368 (1995-08-01), Harada et al.
Hajec Donald T.
Harada Industry Co. Ltd.
Phan Tho
White John P.
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