Array phasing techniques for wide area coverage in a failure mod

Details Array phasing techniques for wide area coverage in a failure mod Array phasing techniques for wide area coverage in a failure mod

1981-02-17

1983-10-18

Lieberman, Eli

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

H01Q 336

Patent

active

044108940

ABSTRACT:
The present invention relates to an array phasing technique which normally provides directional spotbeams, and in the event of a failure mode of a phase shift controller for providing a wide area coverage beam. In an arrangement for practicing the present technique, each array feed element has disposed at its input a serial arrangement of a fixed value phase shifter (32) and a variable phase shifter (34). Each variable phase shifter has a separate control signal supplied to it by a phase shift controller (36). During normal operation the combined fixed value and variable phase shifters cause the array to radiate a flat wavefront in a predetermined direction, and in a failure mode of the phase shift controller the fixed phase shifters cause the array to radiate a diverging area coverage beam.

REFERENCES:
patent: 3041605 (1962-06-01), Goodwin et al.
patent: 3056961 (1962-10-01), Mitchell
patent: 3119965 (1964-01-01), Phillips
Reudink et al.; A Scanning Spot-Beam Satellite System; BSTJ, vol. 56, No. 8, Oct. 1977, pp. 1549-1560.

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