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Abstract
A multiband reflective linear-polarization (LP) converter based on an anisotropic metasurface is proposed. The unit cell of the metasurface is composed of a hollow oval sheet and a rectangle patch. Simulation results show that the converter can convert LP wave to its orthogonal state and the polarization conversion ratio (PCR) is above 90% in four frequency bands (4.60–12.27 GHz, 13.79–13.90 GHz, 14.61–14.69 GHz, 15.44–15.52 GHz). Interestingly, the relative bandwidth of first band reaches up to 90.9%, which is even broader than most single-band polarization conversion metasurfaces. Furthermore, we analyze the physical mechanism of polarization conversion of the metasurface, and simplify the derived formulas to make approximate calculations for co- and cross-polarization coefficients. The proposed formulas have better applicability than the equations in previous work. The laboratory sample is fabricated, and we have experimentally characterized our idea in microwave region. This design can advance applications in microwave sensors and mm-wave systems.
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Liang-Pei Wu
Liang-Pei Wu received his Bachelor of Engineering Degree from Ningxia University in June 2016. Later he studied for the Master of Engineering Degree at Ningbo University under the supervision of Prof. Jianfeng Dong and graduated in March 2021. He mainly researches the polarization control of electromagnetic waves by metasurfaces.
Quan-Hai Fang
Quanhai Fang received his Bachelor of Engineering Degree from TongLing University in June 2017. Later he studied for the Master of Engineering Degree at Ningbo University under the supervision of Prof. Jianfeng Dong and graduated in July 2020. He mainly studies on the multifunctional metasurface design and light transmission characteristics.
Wei-Kang Pan
Weikang Pan received his Bachelor's and Master's Degree from Ningbo University (Ningbo, China) in June 2016 and June 2019. Now, he is a Ph. D student study in Fudan University (Shanghai, China). His research fields mainly about surface palsmonic polaritons (SPPs) and metasurfaces.
Min-Hua Li
Minhua Li received his M.S. and Ph.D. degrees in radio physics from Central China Normal University in 2010 and 2013, respectively. He joined Ningbo University in 2013 where he is currently working as an associate professor. His current research interests include absorbing materials, microwave antenna technology and meta-devices.
Jian-Feng Dong
Jian-Feng Dong received his B.S. degree from Nankai University, M.S. degree from the Institute of Physics, Chinese Academy of Sciences, and Ph.D. degree from University of Science and Technology of China in 1986, 1989 and 2005, respectively. He joined Ningbo University in 1989 where he is currently working as a full professor. His research interest lies in metamaterials and chiral media waveguides.