Vertical antenna with decoupling sections for multiband operatio

Details Vertical antenna with decoupling sections for multiband operatio Vertical antenna with decoupling sections for multiband operatio

1983-10-12

1986-12-16

Lieberman, Eli

Communications: radio wave antennas

Antennas

With lumped reactance filter in active antenna

343750, H01Q 914

Patent

active

046300600

ABSTRACT:
An eight-band vertical antenna which is omnidirectional and includes completely automatic band switching for the amateur radio frequencies of eighty/seventy-five meters, forty meters, thirty meters, twenty meters, seventeen meters, fifteen meters, twelve and ten meters. The vertical antenna has a low angle of radiation and a low standing wave ratio on all frequencies which provides for direct coaxial cable transmission line feed. The eighty-meter and forty-meter inductor-capacitors are in parallel while the thirty-meter inductor-capacitor is in series with a portion of the forty-meter circuit providing inductive reactance for operation on eighty/seventy-five meters, forty meters, and thirty meters with a series inductor-capacitor connected between an upper vertical radiating element and the forty-meter inductor while permitting simultaneous resonance on each of the three higher frequencies of twenty, fifteen and ten meters. The entire radiator length of the vertical antenna is active on all frequencies except for fifteen meters where the upper portion of the antenna is decoupled above an end of a fifteen-meter quarter-wave decoupling stub. The seventeen- and twelve-meter circuits provide for decoupling so that the entire radiator length of the vertical antenna is active.

REFERENCES:
patent: 4442436 (1984-04-01), Newcomb

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