Glass antenna amplifier
First Claim
Patent Images
1. A compensated/amplifying device for glass antennas which uses a heating element for removing fog on the glass of a vehicle window as an antenna element, comprising:
- band-pass filter coils for AM signals and FM signals interposed between a direct current power supply of said vehicle and said heating element, said band-pass filter coils comprising an FM band-pass filters coil, an AM band-pass filters coil and a canceling coil each separately wound, said canceling coil being wound such that a direction and magnitude of a magnetic field created from direct current power supply passing through said canceling coil are opposite to a direction and magnitude of a magnetic field of said AM band-pass coil;
an amplifier means coupled to said band-pass filter coils; and
a floating capacity formed between said heating element and ground and provided in parallel with said band-pass filter coils, said floating capacity and said band-pass filter coils forming input AM and FM band-pass filters for said amplifier means.
0 Assignments
0 Petitions
Accused Products
Abstract
A compensating/amplifying device for a window glass antenna for an automobile. The device utilizes heating wires, which remove fog formed on the automobile window glass, as an antenna and includes band-pass filter coils interposed between a battery of the automobile and the heating wires, and the band-pass filter coils and a floating capacity between the heating wires and ground are used as a part of an input band-pass filter of a compensating amplifier.
20 Citations
5 Claims
-
1. A compensated/amplifying device for glass antennas which uses a heating element for removing fog on the glass of a vehicle window as an antenna element, comprising:
-
band-pass filter coils for AM signals and FM signals interposed between a direct current power supply of said vehicle and said heating element, said band-pass filter coils comprising an FM band-pass filters coil, an AM band-pass filters coil and a canceling coil each separately wound, said canceling coil being wound such that a direction and magnitude of a magnetic field created from direct current power supply passing through said canceling coil are opposite to a direction and magnitude of a magnetic field of said AM band-pass coil; an amplifier means coupled to said band-pass filter coils; and a floating capacity formed between said heating element and ground and provided in parallel with said band-pass filter coils, said floating capacity and said band-pass filter coils forming input AM and FM band-pass filters for said amplifier means. - View Dependent Claims (2, 3, 4, 5)
-
Specification