Limited scan phased array system

Details Limited scan phased array system Limited scan phased array system

1978-04-03

1980-10-14

Lieberman, Eli

Communications: radio wave antennas

Antennas

With coupling network or impedance in the leadin

H01Q 326

Patent

active

042284368

ABSTRACT:
A phased array antenna system is disclosed for scanning a narrow beam over a limited angular sector with near optimum performance while using the minimum number of active elements. An input corporate feed is coupled to a "thinned" array of phase shifters. Each phase shifter is coupled to one of a plurality of lossless periodic matrix sub-array feed networks. Radiating elements are coupled in periods such as three elements per period. The output of each phase shifter is selectively coupled to the array of radiating elements within its period and to elements in adjacent periods as well. Such an array permits a plurality of overlapping main beams having low side lobes and grating lobes.

REFERENCES:
patent: 2407169 (1946-09-01), Loughren
patent: 3803625 (1974-04-01), Nemit
patent: 3964066 (1976-06-01), Nemit
patent: 4045800 (1977-08-01), Tang et al.
patent: 4124852 (1978-11-01), Steudel

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