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High-efficiency polarization conversion phase gradient metasurface for wideband anomalous reflection

2017; American Institute of Physics; Volume: 122; Issue: 1 Linguagem: Inglês

10.1063/1.4991505

1520-8850

Jiameng Zhang, Lan Yang, Linpeng Li, Tong Zhang, Haihong Li, Qingmin Wang, Yanan Hao, Ming Lei, Ke Bi,

Antenna Design and Analysis

An ultra-wideband polarization conversion metasurface based on S-shaped metallic structure is designed and prepared. The simulation results show that the polarization conversion bandwidth is 14 GHz for linearly polarized normally incident electromagnetic waves and the cross-polarized reflectance is more than 99% in the range of 10.3 GHz–20.5 GHz. On the premise of high reflection efficiency, the reflective phase can be regulated by changing the geometrical parameter of the S-shaped metallic structure. A phase gradient metasurface composed of six periodically arrayed S-shaped unit cells is proposed and further demonstrated both numerically and experimentally. The specular cross-polarization reflection of the phase gradient metasurface is below −10 dB, which shows a good performance on manipulating the direction of the reflected electromagnetic waves.