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Broadband radar cross-section reduction using polarization conversion metasurface

Published online by Cambridge University Press:  28 January 2018

Qi Zheng*
Affiliation:
School of Electronics and Information, Northwestern Polytechnical University, Xi'an, China
Chenjiang Guo
Affiliation:
School of Electronics and Information, Northwestern Polytechnical University, Xi'an, China
Haixiong Li
Affiliation:
School of Electronics and Information, Northwestern Polytechnical University, Xi'an, China
Jun Ding
Affiliation:
School of Electronics and Information, Northwestern Polytechnical University, Xi'an, China
*
Author for correspondence: Qi Zheng, E-mail: zhq930908@163.com

Abstract

A wideband and high-efficiency polarization conversion metasurface (PCM) is proposed and applied to reduce radar cross section (RCS). The proposed PCM unit is composed of two oblique asymmetry triangle split rings, which generate multiple plasmon resonances. Simulated and measured results demonstrate that it achieves polarization conversion over 90% from 9.24 to 17.64 GHz. Besides square checkerboard, the proposed PCM units and mirror units are arranged in triangle checkerboard. The mechanisms of both checkerboard PCMs are analyzed based on standard array theory, including the relationship between RCS reduction value and polarization conversion ratio value. The derived formulas provide a guideline to design checkerboard structure based on PCM. Simulated results demonstrate that both checkerboard PCMs achieve over 62% relative bandwidth of 10 dB RCS reduction under normal incidence with respect to the equal-sized metallic plate, which also means that the triangle one could be an alternative solution to reduce RCS. To verify the analyzed and simulated results, the fabricated sample and measured results of both checkerboard PCMs are presented. Good agreements are achieved between measurements, simulations and numerical analysis.

Type
Research Papers
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2018 

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