Phase-variable spiral antenna and steerable arrays thereof

Details Phase-variable spiral antenna and steerable arrays thereof Phase-variable spiral antenna and steerable arrays thereof

1981-07-29

1984-01-24

Lieberman, Eli

Communications: radio wave antennas

Antennas

With means for moving directive antenna for scanning,...

343895, H01Q 136

Patent

active

044279841

ABSTRACT:
An antenna utilizes a conductive helix mounted in front of a conductive cup and transformer impedance-matching balun, with the helix rotatable about the antenna center line to allow adjustment of the variable phase thereof with respect to a reference phase. An array formed of a plurality of the phase-variable antennas allows the maximum gain lobe of that array to be steered through some angle, relative to an array center line essentially parallel to the parallel center lines of the plurality of array antennas, by variation of the individual antenna phases, relative to a reference phase. The plurality of antennas may have the feed points thereof combined, to provide a high-gain steerable array of relatively great mechanical strength.

REFERENCES:
patent: 2541836 (1951-02-01), Salisbury
patent: 2663869 (1953-12-01), Adcock et al.
patent: 3383695 (1968-05-01), Jarek

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