Ultra-wideband linear-to-circular polarization conversion metasurface

doi:10.1088/1674-1056/ab9de5

中国物理B ›› 2020, Vol. 29 ›› Issue (10): 104205-.doi: 10.1088/1674-1056/ab9de5

Bao-Qin Lin(林宝勤)¹^,†(), Lin-Tao Lv(吕林涛)¹, Jian-Xin Guo(郭建新)¹, Zu-Liang Wang(王祖良)¹, Shi-Qi Huang(黄世奇)¹, Yan-Wen Wang(王衍文)¹

收稿日期:2020-03-19 修回日期:2020-05-06 接受日期:2020-06-18 出版日期:2020-10-05 发布日期:2020-10-05
通讯作者: Bao-Qin Lin(林宝勤)

Ultra-wideband linear-to-circular polarization conversion metasurface

Bao-Qin Lin(林宝勤)†, Lin-Tao Lv(吕林涛), Jian-Xin Guo(郭建新), Zu-Liang Wang(王祖良), Shi-Qi Huang(黄世奇), and Yan-Wen Wang(王衍文)

¹ School of Information Engineering, Xijing University, Xi’an 710123, China

Received:2020-03-19 Revised:2020-05-06 Accepted:2020-06-18 Online:2020-10-05 Published:2020-10-05
Contact: ^†Corresponding author. E-mail: aflbq@sina.com
About author:
†Corresponding author. E-mail: aflbq@sina.com
* Project supported by the Natural Science Foundation of Shaanxi Province, China (Grant Nos. 2019JM-077 and 2018JM-6098), the Scientific Research Program Funded by Shaanxi Provincial Education Department (Grant No. 18JK1195), and the Shaanxi Key Research and Development Project, China (Grant No. 2019GY-055).

摘要/Abstract

Abstract:

An ultra-wideband and high-efficiency reflective linear-to-circular polarization conversion metasurface is proposed. The proposed metasurface is composed of a square array of a corner-truncated square patch printed on grounded dielectric substrate and covered with a dielectric layer, which is an orthotropic anisotropic structure with a pair of mutually perpendicular symmetric axes u and v along the directions with the tilt angles of ±45° with respect to the vertical y axis. When the u- and v-polarized waves are incident on the proposed metasurface, the phase difference between the two reflection coefficients is close to –90° in an ultra-wide frequency band, so it can realize high-efficiency and ultra-wideband LTC polarization conversion under both x- and y-polarized incidences in this band. The proposed polarization conversion metasurface is simulated and measured. Both the simulated and measured results show that the axial ratio (AR) of the reflected wave is kept below 3 dB in the ultra-wide frequency band of 5.87 GHz–21.13 GHz, which is corresponding to a relative bandwidth of 113%; moreover, the polarization conversion rate (PCR) can be kept larger than 99% in a frequency range of 8.08 GHz–20.92 GHz.

Key words: metasurface, polarization conversion, circular polarization

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), Lin-Tao Lv(吕林涛), Jian-Xin Guo(郭建新), Zu-Liang Wang(王祖良), Shi-Qi Huang(黄世奇), Yan-Wen Wang(王衍文). [J]. 中国物理B, 2020, 29(10): 104205-.

Bao-Qin Lin(林宝勤)†, Lin-Tao Lv(吕林涛), Jian-Xin Guo(郭建新), Zu-Liang Wang(王祖良), Shi-Qi Huang(黄世奇), and Yan-Wen Wang(王衍文). Ultra-wideband linear-to-circular polarization conversion metasurface[J]. Chin. Phys. B, 2020, 29(10): 104205-.

图/表 7

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Ultra-wideband linear-to-circular polarization conversion metasurface

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