Photorefractive adaptive sidelobe canceler for phased-array antennas

Robert M. Montgomery; William B. Beaudet; Michael R. Lange

doi:10.1117/12.138409

2 December 1992 Photorefractive adaptive sidelobe canceler for phased-array antennas

Robert M. Montgomery, William B. Beaudet, Michael R. Lange

Proceedings Volume 1703, Optical Technology for Microwave Applications VI and Optoelectronic Signal Processing for Phased-Array Antennas III; (1992) https://doi.org/10.1117/12.138409
Event: Aerospace Sensing, 1992, Orlando, FL, United States

Abstract

This paper reports on the continuation of work on photorefractive correlation and tapped delay line structures for the implementation of adaptive signal processors. A six channel implementation of a sidelobe canceling system will be described. The laboratory model is approximately 30 cm in length. It uses indium phosphide as the photorefractive material and a six channel tellurium dioxide Bragg cell delay line. A time integrating correlator uses a 1.2 micron 'write' laser. The correlation coefficients are applied to tap the delay line with a 1.3 micron read laser. A combination of polarization and wavelength multiplexing are used to obtain greater than 60 dB read/write isolation. The system is designed to achieve greater than 40 dB of suppression of CW interference over a 20 MHz band centered at 70 MHz. The adaptation time for pulsed CW interferers is designed to achieve greater than 30 dB suppression within 100 microseconds.

Citation Download Citation

Robert M. Montgomery, William B. Beaudet, and Michael R. Lange "Photorefractive adaptive sidelobe canceler for phased-array antennas", Proc. SPIE 1703, Optical Technology for Microwave Applications VI and Optoelectronic Signal Processing for Phased-Array Antennas III, (2 December 1992); https://doi.org/10.1117/12.138409

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