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

doi:10.1088/1674-1056/ac11ec

中国物理B ›› 2022, Vol. 31 ›› Issue (3): 34204-034204.doi: 10.1088/1674-1056/ac11ec

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

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)

School of Information Engineering, Xijing University, Xi'an 710123, China

收稿日期:2021-05-27 修回日期:2021-06-28 接受日期:2021-07-07 出版日期:2022-02-22 发布日期:2022-02-14
通讯作者: Bao-Qin Lin E-mail:aflbq@sina.com
基金资助:
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).

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

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)

School of Information Engineering, Xijing University, Xi'an 710123, China

Received:2021-05-27 Revised:2021-06-28 Accepted:2021-07-07 Online:2022-02-22 Published:2022-02-14
Contact: Bao-Qin Lin E-mail:aflbq@sina.com
Supported by:
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).

摘要/Abstract

摘要： 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.

关键词: coding metasurface, Pancharatnam—Berry phase, radar cross-section (RCS)

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.

Key words: coding metasurface, Pancharatnam—Berry phase, radar cross-section (RCS)

中图分类号: (Polarization)

42.25.Ja

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))

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[J]. 中国物理B, 2022, 31(3): 34204-034204.

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

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

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