Ultra-thin anisotropic transmitting metasurface for polarization beam splitter application

作者：Guo, Wen-Long; Wang, Guang-Ming^*; Ding, Shan-Shan; Li, Hai-Peng; Cai, Tong

来源：Chinese Physics B, 2016, 25(8): 084101.

DOI：10.1088/1674-1056/25/8/084101

• metasurface
• polarization beam splitter

We report a polarization beam splitter based on phase gradient metasurface for microwave frequency region. The metasurface is constructed by anisotropic cells with independent phase response for differently-polarized waves. Through putting different gradient phases for orthogonally-polarized waves on a focusing metasurface, the anisotropic sample has the ability to enhance gain and split orthogonally-polarized waves. The simulation results indicate that the incident spherical waves are converted into plane waves and split into an x-polarized wave with a refraction angle of -24 degrees and a y-polarized wave with a refraction angle of 37.6 degrees in the y direction. For verification, a metasurface sample with a size of 102.5 mm x102.5 mm is fabricated and measured. The consistence between numerical and experimental results validates the improved gain of 10.5-dB against the feed source and the splitting effect. Moreover, the thickness of the proposed metasurface is 3 mm which is ultra-thin against the wavelength at 15 GHz. The proposed prescription opens a new route to the applications of anisotropic metasurface in microwave band.

• 出版日期2016-8
• 单位中国人民解放军空军工程大学