Ultrathin Dual-Band Metasurface Polarization Converter

被引:139
作者
Huang, Xiaojun [1 ]
Yang, Helin [2 ]
Zhang, Daohua [3 ]
Luo, Yu [3 ]
机构
[1] Xian Univ Sci & Technol, Coll Commun & Informat Engn, Xian 710054, Shaanxi, Peoples R China
[2] Cent China Normal Univ, Wuhan 430079, Hubei, Peoples R China
[3] Nanyang Technol Univ, Sch Elect & Elect Engn, Singapore 639798, Singapore
基金
中国国家自然科学基金;
关键词
Dual band; metasurface; polarization converter; BROAD-BAND; CONVERSION; METAMATERIALS; ANTENNA; CLOAK; RCS;
D O I
10.1109/TAP.2019.2911377
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Metamaterials offer the freedom to manipulate the polarization states of light at the subwavelength scale. However, previous designs generally made use of single resonance and, hence, only function for one specific incident polarization within a single-frequency band. In this paper, we present a dual-band metasurface based on a concentric rectangular arrangement to control the polarizations of both linearly and circularly polarized electromagnetic waves. We show that, on the one hand, the proposed metasurface structure can convert the polarization of linearly polarized waves to the cross direction in two broad frequency bands 4.40-5.30 GHz and 9.45-13.60 GHz. On the other hand, this design can also reflect circularly polarized waves without changing the handedness in two frequency bands 4.47-5.35 GHz and 9.57-13.57 GHz. For both cases, average polarization conversion efficiency larger than 86% was obtained in our experiment. The numerical simulations reveal that the dual-band cross-polarization coupling results from the strong electric and magnetic resonances between the top and bottom layers. The ultrathin polarization converter experimentally realized in this paper provides an important stepping stone for the future design of other dual-band metasurface devices and is believed to be extendable to higher frequency regimes.
引用
收藏
页码:4636 / 4641
页数:6
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