Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Synthesis of Time-Modulated Sparse Circular Arrays With Rotationally Symmetric Structure

Version 1 : Received: 4 January 2024 / Approved: 4 January 2024 / Online: 5 January 2024 (10:48:34 CET)

How to cite: Nie, D.; Wang, R.; Liu, W.; Wang, L.; Sun, L.; Yun, Y.; Wu, Z. Synthesis of Time-Modulated Sparse Circular Arrays With Rotationally Symmetric Structure. Preprints 2024, 2024010447. https://doi.org/10.20944/preprints202401.0447.v1 Nie, D.; Wang, R.; Liu, W.; Wang, L.; Sun, L.; Yun, Y.; Wu, Z. Synthesis of Time-Modulated Sparse Circular Arrays With Rotationally Symmetric Structure. Preprints 2024, 2024010447. https://doi.org/10.20944/preprints202401.0447.v1

Abstract

Time-modulated sparse circular array (TMSCA) with elements uniformly excited is designed and synthesized in this paper. By utilizing rotationally symmetric structure, the array geometry and the time modulation of the TMSCA is presented, and the radiation patterns in frequency domain are formulated. In order to achieve the desired radiation pattern at the operating frequency and suppress the sideband radiation, the synthesis problem is established and solved by the proposed harmony search-convex programming (HS-CP) algorithm in two dependent optimizations. Two designs are presented, and the numerical results indicate that the TMSCA with rotationally symmetric structure has the advantages of designing time-modulated sparse arrays with superior performance.

Keywords

sparse circular array; time modulation; rotational symmetry; peak sidelobe level; null depth; sideband level

Subject

Engineering, Electrical and Electronic Engineering

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