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.
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.
作者
Qi Wang
Xiangkun Kong
Xiangxi Yan
Yan Xu
Shaobin Liu
Jinjun Mo
Xiaochun Liu
王奇;孔祥鲲;严祥熙;徐岩;刘少斌;莫锦军;刘晓春(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;School of Aeronautics and Astronautics, Central South University, Changsha 410083, China;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)
基金
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)
Jiangsu Planned Projects for Postdoctoral Research Funds,China(Grant No.1601009B)
