An ultra-wideband 2-bit coding metasurface using Pancharatnam—Berry phase for radar cross-section reduction

doi:10.1088/1674-1056/ac11ec

Abstract An ultra-wideband 2-bit coding metasurface is designed for radar cross-section (RCS) reduction. The design process is presented in detail, in which a polarization conversion metasurface (PCM) is first proposed. The proposed PCM can realize ultra-wideband circular polarization (CP) maintaining reflection. Moreover, Pancharatnam—Berry (PB) phase will be generated in the co-polarized reflection coefficient by rotating the metallic patches in its unit cells. Thus, based on the PCM, the four coding elements of a 2-bit coding metasurface are constructed using PB phase, and an ultra-wideband PB 2-bit coding metasurface is proposed according to an appropriate coding sequence. The simulated and experimental results show that the coding metasurface has obvious advantages of wideband and polarization-insensitivity. Compared to a metallic plate of the same size, it can achieve more than 10 dB RCS reduction in the frequency band from 9.8 GHz to 42.6 GHz with a relative bandwidth of 125.2% under normal incidence with arbitrary polarizations.

Keywords: coding metasurface Pancharatnam—Berry phase radar cross-section (RCS)

Received: 27 May 2021
Revised: 28 June 2021
Accepted manuscript online: 07 July 2021

PACS:	42.25.Ja	(Polarization)
	42.79.Fm	(Reflectors, beam splitters, and deflectors)
	78.20.Ci	(Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity))

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 62072378), the Natural Science Foundation of Shaanxi Province, China (Grant No. 2019JM- 077), and the Xi'an Science and Technology Plan Project, China (Grant No. GXYD20.4).

Corresponding Authors: Bao-Qin Lin
E-mail: aflbq@sina.com

Cite this article:

Bao-Qin Lin(林宝勤), Wen-Zhun Huang(黄文准), Lin-Tao Lv(吕林涛), Jian-Xin Guo(郭建新),Yan-Wen Wang(王衍文), and Hong-Jun Ye(叶红军) An ultra-wideband 2-bit coding metasurface using Pancharatnam—Berry phase for radar cross-section reduction 2022 Chin. Phys. B 31 034204

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An ultra-wideband 2-bit coding metasurface using Pancharatnam—Berry phase for radar cross-section reduction

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