Sidelobe Suppression in Time Modulated Linear Arrays with Unequal Element Spacing

G. Li Department of Microwave Engineering, School of Electronic Engineering, University of Electronic Science and Technology of China (UESTC), Chengdu 610054, China

S. Yang Department of Microwave Engineering, School of Electronic Engineering, University of Electronic Science and Technology of China (UESTC), Chengdu 610054, China

M. Huang Department of Microwave Engineering, School of Electronic Engineering, University of Electronic Science and Technology of China (UESTC), Chengdu 610054, China

Z. Nie Department of Microwave Engineering, School of Electronic Engineering, University of Electronic Science and Technology of China (UESTC), Chengdu 610054, China

Abstract

In this paper, an additional degree of freedom "time" is introduced into conventional linear arrays with unequal element spacing forming the time modulated unequally spaced linear arrays (TMUSLAs). The differential evolution (DE) algorithm is adopted to optimize the positions and switch-on times of elements in the TMUSLAs to suppress the sidelobe levels (SLLs), sideband levels (SBLs) and constrain the beamwidth, simultaneously. Numerical results show that lower SLLs and SBLs are obtained by the proposed method than those by the published results.

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Sidelobe Suppression in Time Modulated Linear Arrays with Unequal Element Spacing

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