Variable time delay for RF/microwave signal processing

Edward N. Toughlian; Henry Zmuda

doi:10.1117/12.45566

1 August 1991 Variable time delay for RF/microwave signal processing

Edward N. Toughlian, Henry Zmuda

Proceedings Volume 1476, Optical Technology for Microwave Applications V; (1991) https://doi.org/10.1117/12.45566
Event: Orlando '91, 1991, Orlando, FL, United States

Abstract

This paper addresses the problem of dynamic optical processing for the control of phased array antennas. The significant result presented is the demonstration of a continuously variable photonic RF/microwave delay line. It is shown that by applying spatial frequency dependent optical phase compensation in an optical heterodyne process, variable RF delay can be achieved over a prescribed frequency band. Experimental results which demonstrate the performance of the delay line with regard to both maximum delay and resolution over a broad bandwidth are presented. Additionally, a spatially integrated optical system is proposed for control of phased array antennas. This approach uses a class of spatial light modulator known as a deformable mirror device and leads to a steerable arbitrary antenna radiation pattern of the true time delay type. Also considered is the ability to utilize the delay line as a general photonic signal processing element in an adaptive (reconfigurable) transversal frequency filter configuration.

Citation Download Citation

Edward N. Toughlian and Henry Zmuda "Variable time delay for RF/microwave signal processing", Proc. SPIE 1476, Optical Technology for Microwave Applications V, (1 August 1991); https://doi.org/10.1117/12.45566

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