Tuneable antenna with inductive coupling at input

Details Tuneable antenna with inductive coupling at input Tuneable antenna with inductive coupling at input

1983-09-02

1986-04-22

Lieberman, Eli

Communications: radio wave antennas

Antennas

With variable reactance for tuning antenna

343861, H01Q 924, H01Q 148

Patent

active

045845875

ABSTRACT:
A whip antenna system for surface vehicles or the like. The antenna system's tuner has an LC tank circuit, into whose inductor is inserted a coil that is connected to the vehicle's transmitter/receiver, the coil being field coupled to the tank circuit's inductor. The inserted coil provides sufficient reactance that the vehicle need not serve as a counterpoise, thus providing an antenna of comparable size but electrically less close to the ground (i.e. one that has better "seeing"), and useable with non-metallic vehicles (e.g. fiberglass boats).

REFERENCES:
patent: 4117493 (1978-09-01), Altmayer
patent: 4180819 (1979-12-01), Nakano
patent: 4360814 (1982-11-01), Wells

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