High frequency roll-bar loop antenna

Details High frequency roll-bar loop antenna High frequency roll-bar loop antenna

1979-08-27

1980-08-12

Lieberman, Eli

Communications: radio wave antennas

Antennas

With vehicle

343744, 343845, 343856, H01Q 132, H01Q 700

Patent

active

042175917

ABSTRACT:
A vehicular mounted loop antenna which operates as an NVIS radio communicon antenna over one range of frequencies and as a vertically polarized whip antenna over another range of frequencies corresponding to the frequency range of a radio communication set equipped with a conventional whip antenna. A coupling loop of variable area and a transmitting loop are positioned in a common vertical plane on a horizontally disposed base member, with the coupling loop positioned within the transmitting loop. A variable capacitor is in circuit with, and is an integral element of, the transmitter loop to provide resonance over the desired operating frequency range.

REFERENCES:
patent: 2431124 (1947-11-01), Kees et al.

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