Adaptive phased-array radar processing using photorefractive crystals

Robert T. Weverka; Kelvin H. Wagner

doi:10.1117/12.18168

1 June 1990 Adaptive phased-array radar processing using photorefractive crystals

Robert T. Weverka, Kelvin H. Wagner

Proceedings Volume 1217, Optoelectronic Signal Processing for Phased-Array Antennas II; (1990) https://doi.org/10.1117/12.18168
Event: OE/LASE '90, 1990, Los Angeles, CA, United States

Abstract

An unconstrained, adaptive, null-steering phased-array optical processor that utilizes a photorefractive crystal to time-integrate the adaptive weights, and null out correlated jammers is described. A passive processor is presented, where it is assumed that it is only known a priori that the signal is broad-band and the jammers are narrow-band. The passive processor computes the angle(s) of arrival of the jammers and extinguishes them. Also presented is an active processor in which the temporal waveform of the desired signal is known, but the look direction is not. The processor computes the angle(s) of arrival of the desired signal and steers the array to look in that direction while nulling any narrow-band jammers. These are two embodiments of a class of processors which use the angular selectivity of volume holograms to form the nulls and look directions in an adaptive phased array radar antenna pattern

Citation Download Citation

Robert T. Weverka and Kelvin H. Wagner "Adaptive phased-array radar processing using photorefractive crystals", Proc. SPIE 1217, Optoelectronic Signal Processing for Phased-Array Antennas II, (1 June 1990); https://doi.org/10.1117/12.18168

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