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Proceedings Paper

Variable time delay for RF/microwave signal processing
Author(s): Edward N. Toughlian; Henry Zmuda
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Paper 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.

Paper Details

Date Published: 1 August 1991
PDF: 15 pages
Proc. SPIE 1476, Optical Technology for Microwave Applications V, (1 August 1991); doi: 10.1117/12.45566
Show Author Affiliations
Edward N. Toughlian, Rome Lab. (United States)
Henry Zmuda, Stevens Institute of Technology (United States)

Published in SPIE Proceedings Vol. 1476:
Optical Technology for Microwave Applications V
Shi-Kay Yao, Editor(s)

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