中国物理B ›› 2018, Vol. 27 ›› Issue (5): 54204-054204.doi: 10.1088/1674-1056/27/5/054204

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Wideband linear-to-circular polarization conversion realized by a transmissive anisotropic metasurface

Bao-Qin Lin(林宝勤), Jian-Xin Guo(郭建新), Bai-Gang Huang(黄百钢), Lin-Bo Fang(方林波), Peng Chu(储鹏), Xiang-Wen Liu(刘湘雯)   

  1. School of Information Engineering, Xijing University, Xi'an 710051, China
  • 收稿日期:2017-11-26 修回日期:2018-01-22 出版日期:2018-05-05 发布日期:2018-05-05
  • 通讯作者: Bao-Qin Lin E-mail:afdaxy@sina.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No.61471387) and the Research Center for Internet of Things and Big Data Technology of Xijing University,China.

Wideband linear-to-circular polarization conversion realized by a transmissive anisotropic metasurface

Bao-Qin Lin(林宝勤), Jian-Xin Guo(郭建新), Bai-Gang Huang(黄百钢), Lin-Bo Fang(方林波), Peng Chu(储鹏), Xiang-Wen Liu(刘湘雯)   

  1. School of Information Engineering, Xijing University, Xi'an 710051, China
  • Received:2017-11-26 Revised:2018-01-22 Online:2018-05-05 Published:2018-05-05
  • Contact: Bao-Qin Lin E-mail:afdaxy@sina.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No.61471387) and the Research Center for Internet of Things and Big Data Technology of Xijing University,China.

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摘要： We propose a metasurface which consists of three conductive layers separated by two dielectric layers. Each conductive layer consists of a square array of square loop apertures, however, a pair of corners of each square metal patch surrounded by the square loop apertures have been truncated, so it becomes an orthotropic structure with a pair of mutually perpendicular symmetric axes u and v. The simulated results show that the metasurface can be used as a wideband transmission-type polarization converter to realize linear-to-circular polarization conversion in the frequency range from 12.21 GHz to 18.39 GHz, which is corresponding to a 40.4% fractional bandwidth. Moreover, its transmission coefficients at x-and y-polarized incidences are completely equal. We have analyzed the cause of the polarization conversion, and derived several formulas which can be used to calculate the magnitudes of cross-and co-polarization transmission coefficients at y-polarized incidence, together with the phase difference between them, based on the two independent transmission coefficients at u-and v-polarized incidences. Finally, one experiment was carried out, and the experiment and simulated results are in good agreement with each other.

关键词: polarization converter, metasurface, circular polarization

Abstract: We propose a metasurface which consists of three conductive layers separated by two dielectric layers. Each conductive layer consists of a square array of square loop apertures, however, a pair of corners of each square metal patch surrounded by the square loop apertures have been truncated, so it becomes an orthotropic structure with a pair of mutually perpendicular symmetric axes u and v. The simulated results show that the metasurface can be used as a wideband transmission-type polarization converter to realize linear-to-circular polarization conversion in the frequency range from 12.21 GHz to 18.39 GHz, which is corresponding to a 40.4% fractional bandwidth. Moreover, its transmission coefficients at x-and y-polarized incidences are completely equal. We have analyzed the cause of the polarization conversion, and derived several formulas which can be used to calculate the magnitudes of cross-and co-polarization transmission coefficients at y-polarized incidence, together with the phase difference between them, based on the two independent transmission coefficients at u-and v-polarized incidences. Finally, one experiment was carried out, and the experiment and simulated results are in good agreement with each other.

Key words: polarization converter, metasurface, 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))