Three-element antenna formed of orthogonal loops mounted on a mo

Details Three-element antenna formed of orthogonal loops mounted on a mo Three-element antenna formed of orthogonal loops mounted on a mo

1982-02-05

1984-02-21

Lieberman, Eli

Communications: radio wave antennas

Antennas

Plural separate diverse type

343742, 343842, H01Q 700

Patent

active

044333366

ABSTRACT:
A three-element directional/omnidirectional antenna adapted for use in both transmitting and receiving modes. Crossed loop antennas are mounted on top of a monopole whip antenna and are electrically coupled thereto. Each of the loop antennas consists of an outer larger primary loop and an inner secondary loop joined at its base to the primary loop. Both the primary and secondary loops are interrupted at their top ends opposite the point where they join the monopole antenna. A tuning capacitor is coupled between the two halves of each of the primary loops, while a coaxial antenna feeds the two secondary loops. The coaxial cables feeding the secondary loops pass through a dual ferrite choke disposed within the monopole antenna.

REFERENCES:
patent: 3588905 (1971-06-01), Dunlavy
patent: 3882506 (1975-05-01), Mori et al.
patent: 4397041 (1983-08-01), Takeda et al.
Barrick et al.; A Compact Transportable HF Radar System for Directional Ctal Wave Field Meas., Ocean Wave Climate, l979, pp. 153-201.

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