Antenna system with variable directivity

Details Antenna system with variable directivity Antenna system with variable directivity

1979-12-18

1982-07-06

Lieberman, Eli

Communications: radio wave antennas

Antennas

High frequency type loops

343876, 455277, H01Q 324

Patent

active

043386067

ABSTRACT:
An antenna system is disclosed which has a loop antenna divided into n conductive members at n pairs of divisional points where n is a positive integer not smaller than 2, n feeders connected to the n pairs of divisional points respectively, a signal feeding point, and at least one impedance element. In this case, electrical switching circuits are connected between the n feeders and the impedance element, and an electrical control circuit is connected to the electrical switching circuits for selectively connecting the feeding point to one of the n feeders and at the same time for selectively connecting the impedance element to another of the n feeders, so that the directivity characteristic of the antenna system is variable controlled.

REFERENCES:
patent: 3202995 (1965-08-01), Schultz
patent: 3671970 (1972-06-01), Layton
patent: 3956751 (1976-05-01), Herman
patent: 4145694 (1979-03-01), Sletten
patent: 4193077 (1980-03-01), Greenberg et al.

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