Transparent Metasurface for Generating Microwave Vortex Beams with Cross-Polarization Conversion

被引：23
作者：
Shi, Hongyu [1 ]
Wang, Luyi [1 ]
Zhao, Mengran [1 ]
Chen, Juan [2 ]
Zhang, Anxue [1 ]
Xu, Zhuo [3 ]
机构：
[1] Xi An Jiao Tong Univ, Sch Elect & Informat Engn, Xian 710049, Shaanxi, Peoples R China
[2] Xi An Jiao Tong Univ, Shenzhen Res Sch, Shenzhen 518057, Peoples R China
[3] Xi An Jiao Tong Univ, Minist Educ, Key Lab, Elect Mat Res Lab, Xian 710049, Shaanxi, Peoples R China
来源：
MATERIALS | 2018年 / 11卷 / 12期
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
vortex beam; polarization conversion; orbital angular momentum; ORBITAL ANGULAR-MOMENTUM;
D O I：
10.3390/ma11122448
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In this paper, metasurfaces with both cross-polarization conversion and vortex beam-generating are proposed. The proposed finite metasurface designs are able to change the polarization of incident electromagnetic (EM) waves to its cross-polarization. In addition, they also can modulate the incidences into beams carrying orbital angular momentum (OAM) with different orders (l = +1, l = +2, l = -1 and l = -2) by applying corresponding transmission phase distribution schemes on the metasurface aperture. The generated vortex beams are at 5.14 GHz. The transmission loss is lower than 0.5 dB while the co-polarization level is -10 dB compared to the cross-polarization level. The measurement results confirmed the simulation results and verified the properties of the proposed designs.
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页数：10
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