Programmable delay line for radar testing

Harry T.M. Wang

doi:10.1117/12.138422

2 December 1992 Programmable delay line for radar testing

Harry T.M. Wang

Proceedings Volume 1703, Optical Technology for Microwave Applications VI and Optoelectronic Signal Processing for Phased-Array Antennas III; (1992) https://doi.org/10.1117/12.138422
Event: Aerospace Sensing, 1992, Orlando, FL, United States

Abstract

We have fabricated a programmable fiber optic delay line operating in the 1550 nm band capable of providing a total delay of 1 ms in increments of 83.6 ns for RF signals up to 2.5 GHz. Electromechanical switches with 6 ms switching time are employed for programming the delay line. To overcome the switching speed limitation, we used a dual parallel delay line. Signal selection is via a high speed RF switch. For radar test application, the approach enables continuous tracking (to within a range cell of 42 ft) of a moving target with negligible loss of data. Three erbium-doped fiber optical amplifiers excited by a single 1480 nm pump laser are used to compensate for losses in each of the delay lines.

Citation Download Citation

Harry T.M. Wang "Programmable delay line for radar testing", Proc. SPIE 1703, Optical Technology for Microwave Applications VI and Optoelectronic Signal Processing for Phased-Array Antennas III, (2 December 1992); https://doi.org/10.1117/12.138422

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