Optimization of thinned aperiodic linear phased arrays using genetic algorithms to reduce grating lobes during scanning

Matthew G. Bray, Douglas H. Werner, Daniel W. Boeringer, David W. Machuga

Research output: Contribution to journalArticlepeer-review

161 Scopus citations

Abstract

The scan volume of a thinned periodic linear phased array is proportional to the spacing between array elements. As the spacing between elements increases beyond a half wavelength, the scan range of the array will be significantly reduced due to the appearance of grating lobes. This paper will investigate a method of creating thinned aperiodic linear phased arrays through the application of genetic algorithms that will suppress the grating lobes with increased steering angles. In addition, the genetic algorithm will place restrictions on the driving-point impedance of each element so that they are well behaved during scanning. A genetic algorithm approach will also be introduced for the purpose of evolving an optimal set of matching networks. Finally, an efficient technique for evaluating the directivity of an aperiodic array of half-wave dipoles will be developed for use in conjunction with genetic algorithms.

Original languageEnglish (US)
Pages (from-to)1732-1742
Number of pages11
JournalIEEE Transactions on Antennas and Propagation
Volume50
Issue number12
DOIs
StatePublished - Dec 1 2002

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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