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Journal of Radio Electronics Online scientific journal · eISSN 1684-1719
2022, № 5 · RADIO ENGINEERING

Thinned linear antenna array synthesis using genetic algorithm while maintaining the initial half-power beamwidth and low peak sidelobe level

A.S. Karasev1, M.A. Stepanov1

1 Novosibirsk State Technical University, Novosibirsk, Russia
Full text (PDF) DOI: 10.30898/1684-1719.2022.5.5 UDC 621.396.67.012.12 EDN TNFTYO

Abstract

This paper proposes a genetic algorithm as an instrument for antenna array thinning. The algorithm with a deliberately chosen fitness function allows synthesizing thinned linear antenna arrays with low sidelobe level while maintaining the half-power beamwidth of a full linear array. Based on results from existing papers in this field and known approaches to antenna array thinning, a classification of thinning types is introduced. The optimal thinning type for a linear thinned antenna array is determined on the basis of a maximum attainable sidelobe level. The variation of main direction pattern characteristics, such as peak sidelobe level and half-power beamwidth, with respect to a thinning coefficient, are discussed for a number of amplitude tapers.

  • linear antenna array
  • thinned antenna array
  • genetic algorithm
  • thinning type
  • thinning coefficient
Аннотация (на русском)

Синтез разреженной линейной антенной решетки с сохранением ширины главного лепестка и минимальным пиковым уровнем боковых лепестков при помощи генетического алгоритма

В данной работе описан генетический алгоритм, использующийся в качестве инструмента для синтеза разреженных антенных решеток. Алгоритм позволяет синтезировать разреженные линейные антенные решетки с низким пиковым уровнем боковых лепестков и сохранением ширины главного лепестка полной антенной решетки. Вводится система типов разрежения, основанная на результатах синтеза известных подходов к разрежению антенных решеток. На основании максимально достижимого уровня боковых лепестков определяется оптимальный тип разрежения. Рассмотрены зависимости основных параметров диаграммы направленности антенных решеток с различными амплитудными распределениями от коэффициента разрежения.

For citation

Karasev A.S., Stepanov M.A. Thinned linear antenna array synthesis using genetic algorithm while maintaining the initial half-power beamwidth and low peak sidelobe level // Journal of Radio Electronics. – 2022. – No. 5. https://doi.org/10.30898/1684-1719.2022.5.5

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