Subarray pattern control and null steering for subarray antenna

Details Subarray pattern control and null steering for subarray antenna Subarray pattern control and null steering for subarray antenna

1979-09-07

1981-01-20

Lieberman, Eli

Communications: radio wave antennas

Antennas

With coupling network or impedance in the leadin

343754, H01Q 328, H01Q 346

Patent

active

042465850

ABSTRACT:
Improved performance of an electronically scanned subarray antenna system is realized by tailoring the subarray pattern in a manner that reduces the undesirable effects of illumination truncation at the edge of the main array. This is accomplished by introducing variable attenuators into individual feed elements to effect an illumination intensity taper of the feed element array output. The improvement permits effective utilization of deterministic and adaptive nulling at both the main array and the subarray levels and further provides a system ability to scan over wide spatial angles with wide bandwidths and low sidelobes. The technique is adaptable to both space fed and constrained subarray antenna systems.

REFERENCES:
patent: 3245081 (1966-04-01), McFarland
patent: 3911442 (1975-10-01), Hatch
patent: 3997900 (1976-12-01), Chin et al.
patent: 4124852 (1978-11-01), Steudel
patent: 4166274 (1979-08-01), Reudink
Chapman, Adaptive Arrays and Sidelobe Cancellers, Microwave Journal, Aug. 1977, pp. 43-46.
Tang, Survey of Time-Delay Beem Steering Techniques, Proceedings of the 1970 Phased Array Antennas Symposium, Artech House Inc. pp.254-260.

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