中国物理B ›› 2019, Vol. 28 ›› Issue (7): 74205-074205.doi: 10.1088/1674-1056/28/7/074205

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

Flexible broadband polarization converter based on metasurface at microwave band

Qi Wang(王奇), Xiangkun Kong(孔祥鲲), Xiangxi Yan(严祥熙), Yan Xu(徐岩), Shaobin Liu(刘少斌), Jinjun Mo(莫锦军), Xiaochun Liu(刘晓春)   

  1. 1 Key Laboratory of Radar Imaging and Microwave Photonics, Ministry of Education, College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China;
    2 School of Aeronautics and Astronautics, Central South University, Changsha 410083, China;
    3 Research Institute for Special Structures of Aeronautical Composite Aviation Industry Corporation of China, Aeronautical Science Key Laboratory for High Performance Electromagnetic Windows, Jinan 250000, China
  • 收稿日期:2019-03-04 修回日期:2019-04-06 出版日期:2019-07-05 发布日期:2019-07-05
  • 通讯作者: Xiangkun Kong E-mail:xkkong@nuaa.edu.cn
  • 基金资助:

    Project supported by the Fundamental Research Funds for the Central Universities, China (Grant No. kfjj20180401), the National Natural Science Foundation of China (Grant No. 61471368), the Aeronautical Science Foundation of China (Grant No. 20161852016), the China Postdoctoral Science Foundation (Grant No. 2016M601802), and Jiangsu Planned Projects for Postdoctoral Research Funds, China (Grant No. 1601009B).

Flexible broadband polarization converter based on metasurface at microwave band

Qi Wang(王奇)1, Xiangkun Kong(孔祥鲲)1, Xiangxi Yan(严祥熙)1, Yan Xu(徐岩)1, Shaobin Liu(刘少斌)1, Jinjun Mo(莫锦军)2, Xiaochun Liu(刘晓春)3   

  1. 1 Key Laboratory of Radar Imaging and Microwave Photonics, Ministry of Education, College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China;
    2 School of Aeronautics and Astronautics, Central South University, Changsha 410083, China;
    3 Research Institute for Special Structures of Aeronautical Composite Aviation Industry Corporation of China, Aeronautical Science Key Laboratory for High Performance Electromagnetic Windows, Jinan 250000, China
  • Received:2019-03-04 Revised:2019-04-06 Online:2019-07-05 Published:2019-07-05
  • Contact: Xiangkun Kong E-mail:xkkong@nuaa.edu.cn
  • Supported by:

    Project supported by the Fundamental Research Funds for the Central Universities, China (Grant No. kfjj20180401), the National Natural Science Foundation of China (Grant No. 61471368), the Aeronautical Science Foundation of China (Grant No. 20161852016), the China Postdoctoral Science Foundation (Grant No. 2016M601802), and Jiangsu Planned Projects for Postdoctoral Research Funds, China (Grant No. 1601009B).

摘要:

A flexible broadband linear polarization converter is proposed based on the metasurface operating at microwave band. To achieve bandwidth extension property, long and short metallic arc wires, as well as the metallic disks placed over a ground plane, are combined into the polarizer, which can generate three neighboring resonances. Due to the combination of the first two resonances and the optimized size and thickness of the unit cell, the polarization converter can have a weak incident angle dependence. Both simulated and measured results confirm that the average polarization conversion ratio is over 85% from 11.3 GHz to 20.2 GHz within a broad range of incident angle from 0° to 45°. Moreover, the proposed polarization converter based on flexible substrates can be applied for conformal design. The simulation and experiment results demonstrate that our designed polarizer still keeps high polarization conversion efficiency, even when it adheres to convex cylindrical surfaces. The periodic metallic structure of the designed polarizer has great potential application values in the microwave, terahertz, and optic regimes.

关键词: polarization converter, flexible metasurface, wide-angle, broadband

Abstract:

A flexible broadband linear polarization converter is proposed based on the metasurface operating at microwave band. To achieve bandwidth extension property, long and short metallic arc wires, as well as the metallic disks placed over a ground plane, are combined into the polarizer, which can generate three neighboring resonances. Due to the combination of the first two resonances and the optimized size and thickness of the unit cell, the polarization converter can have a weak incident angle dependence. Both simulated and measured results confirm that the average polarization conversion ratio is over 85% from 11.3 GHz to 20.2 GHz within a broad range of incident angle from 0° to 45°. Moreover, the proposed polarization converter based on flexible substrates can be applied for conformal design. The simulation and experiment results demonstrate that our designed polarizer still keeps high polarization conversion efficiency, even when it adheres to convex cylindrical surfaces. The periodic metallic structure of the designed polarizer has great potential application values in the microwave, terahertz, and optic regimes.

Key words: polarization converter, flexible metasurface, wide-angle, broadband

中图分类号:  (Wave propagation, transmission and absorption)

  • 42.25.Bs
42.25.Ja (Polarization) 78.67.Pt (Multilayers; superlattices; photonic structures; metamaterials) 92.60.Ta (Electromagnetic wave propagation)