Andrew A. Walston | Researchain

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IEEE Photonics Technology Letters | 1994

High-precision detector-switched monolithic GaAs time-delay network for the optical control of phased arrays

Willie W. Ng; D. Yap; Authi A. Narayanan; Andrew A. Walston

We report the fabrication and characterization of the two-bit monolithic optical time-delay network on GaAs. GaAs rib-waveguides and InGaAs waveguide-coupled MSM detectors serve respectively as delay-lines and optoelectronic switches on the photonic integrated circuit. From the linear RF differential phase observed between 1 and 11 GHz, we estimate that the measured time-delays are within 4 psec of their designed values.<<ETX>>

Proceedings of SPIE | 1992

GaAs optical time-shift network for steering a dual-band microwave phased-array antenna

Willie W. Ng; Daniel Yap; Authi A. Narayanan; Robert R. Hayes; Andrew A. Walston

A monolithic optical time-shift network is described which is designed to steer a dual-band microwave phased array antenna at 2 and 10 GHz. The advantages of using cascade type network architectures to achieve the desired resolution are demonstrated. The implementation of different delay times in this optical time-shifter via bias control of detectors integrated monolithically on a GaAs wafer is described.

Electronics Letters | 1999

GaAs-compatible surface-micromachined RF MEMS switches

Daniel J. Hyman; A. Schmitz; Brett Warneke; Tsung-Yuan Hsu; Juan Lam; J.J. Brown; James H. Schaffner; Andrew A. Walston; Robert Y. Loo; Gregory L. Tangonan; Mehran Mehregany; J. Lee

Archive | 1994