Shortened mast antenna with compensating circuits

Details Shortened mast antenna with compensating circuits Shortened mast antenna with compensating circuits

1992-12-28

1995-03-14

Hajec, Donald

Communications: radio wave antennas

Antennas

With coupling network or impedance in the leadin

343715, 343745, 455293, H01Q 150, H01Q 132

Patent

active

053980360

ABSTRACT:
A shortened mast antenna with a compensating circuit between the antenna and a receiver and used in a state shorter than the resonant state of the antenna. The compensating circuit includes an FM compensating circuit made up with passive elements and compensating FM broadcast signals and an AM compensating circuit equipped with active elements which convert a high impedance into a low impedance so that the AM compensating circuit compensates AM broadcast signals. The attachment part of the antenna, to which the compensating circuit is directly connected, has a stray capacitance of 10 PF or less.

REFERENCES:
patent: 2021734 (1935-11-01), Macalpine
patent: 2810070 (1957-10-01), Yates
patent: 3965426 (1976-06-01), Ringland
patent: 4228544 (1980-10-01), Guyton
patent: 4757277 (1988-07-01), Nakase et al.
patent: 4850034 (1989-07-01), Campbell
patent: 5151708 (1992-09-01), Nakase et al.

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