Adaptive phase-shifter nulling techniques for large-aperture pha

Details Adaptive phase-shifter nulling techniques for large-aperture pha Adaptive phase-shifter nulling techniques for large-aperture pha

1988-12-22

1990-06-26

Blum, Theodore M.

Communications: directive radio wave systems and devices (e.g.,

Directive

Utilizing correlation techniques

342154, G01S 316, G01S 328

Patent

active

049375849

ABSTRACT:
A method of nulling out interference sources in a large-aperture phased ay radar system is described. The system has apriori knowledge of the interference sources and depends upon access to the array element phase shifters for injection of phase only or phase and amplitude perturbations, of a mainbeam aperture distribution, into said array element phase shifters. The phase or phase and amplitude perturbations are derived from an aperture ripple modulation algorithm. The system does not require any auxiliary elements or correlators or beamformers.
A method of nulling out interference sources in a monopulse large-aperture phased array radar system is also described wherein the phase only or phase and amplitude perturbations are injected into both the sum and difference beams.

REFERENCES:
patent: 4555706 (1985-11-01), Haupt
patent: 4575724 (1986-03-01), Wiener
patent: 4720712 (1988-01-01), Brookner et al.

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