Design for Steering Accuracy in Antenna Arrays Using Shared Optical Phase Shifters

Moshe Kam, Peter R. Herczfeld

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Uniform linear phased arrays where many radiating elements share a relatively small number of phase shifters are investigated. Such architectures arise in arrays which derive the time-delays in the signal paths from a small group of independent phase shifters. In particular, a true time-delay device which has been suggested recently for optically controlled arrays is used as the basic phase shifter. Different architectures, viz. alternative procedures of deriving the necessary time-delay for each antenna in the face of phase-shifter inaccuracies are examined. The variance of the steered beam's direction is used as the performance criterion. The direction-optimal architecture is obtained by means of quadratic programming, and is shown to be not unique. The nonuniqueness of the optimal architecture is exploited to improve other characteristics of the array’s beam shape, and the optimal solution is shown to compare favorably with a suboptimal interleaved solution which is easier to implement.

Original languageEnglish (US)
Pages (from-to)1102-1108
Number of pages7
JournalIEEE Transactions on Antennas and Propagation
Volume37
Issue number9
DOIs
StatePublished - Sep 1989
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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