Efficient Ultrawideband Linear Polarization Conversion Based on Cross-shaped Structure Metasurface

被引：2
作者：
Fang Z.-H. [1 ]
Luo C.-R. [1 ]
Zhao X.-P. [1 ]
机构：
[1] Smart Materials Lab, School of Natural and Applied Sciences, Northwestern Polytechnical University, Xi'an
来源：
Zhao, Xiao-Peng (xpzhao@nwpu.edu.cn) | 1600年 / Chinese Optical Society卷 / 46期
基金：
中国国家自然科学基金;
关键词：
Cross polarization conversion; Electromagnetic wave; Metasurface; Reflection; Ultrawideband;
D O I：
10.3788/gzxb20174612.1216001
中图分类号：
学科分类号：
摘要：
A polarization converter that uses metasurfaces composed of cross deformable structure is proposed. Ultrawideband 90° polarization rotation is obtained in the reflective mode. Reflectance of the cross-polarized wave is above-0.2 dB while co-polarization wave is blow-12 dB in range of 8.4-20.7 GHz. The cross-polarized reflectance is greater than-0.03 dB at the resonant frequency points, and the co-polarized reflectance reaches-60 dB. That is, almost complete cross-polarization conversion be achieved at the resonance frequency points. The relative bandwidth is 84.5% with average orthogonal polarization conversion ratio (PCR) of 96.7%. In addition, the metasurface polarization converter is fabricated on FT5880 substrate. The experimental results show that the cross-polarized reflectance is greater than-1 dB in the operating frequency band and the co-polarized reflectivity is less than-10 dB. The experimental results are in good agreement with the simulation results, which verifies that the metasurface can realize the cross-polarization conversion of the linearly polarized electromagnetic wave in the ultra-wide frequency band. The ultrawideband conversion metasurface has the advantages of high conversion efficiency and simple geometric structure. The similar model can be extended to terahertz or even visible light. © 2017, Science Press. All right reserved.
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