Wide-band circular polarization-keeping reflection mediated by metasurface
Li Yong-Feng (李勇峰)a, Zhang Jie-Qiu (张介秋)a, Qu Shao-Bo (屈绍波)a, Wang Jia-Fu (王甲富)a, Zheng Lin (郑麟)a, Zhou Hang (周航)a, Xu Zhuo (徐卓)b, Zhang An-Xue (张安学)c
a College of Science, Air Force Engineering University, Xi'an 710005, China; b Electronic Materials Research Laboratory, Key Laboratory of Ministry of Education, Xi'an Jiaotong University, Xi'an 710049, China; c School of Electronics & Information Engineering, Xi'an Jiaotong University, Xi'an 710049, China
Abstract In this paper, we show that circular polarization-keeping reflection can be achieved using reflective metasurfaces. The underlying physical mechanism of the polarization-keeping reflection is analyzed using a reflection matrix. A wideband circular polarization-keeping reflector is demonstrated using N-shaped resonators. Both the simulation and experiment results show that the polarization-keeping reflection can be achieved with a high efficiency larger than 98% over the frequency range from 9.2 GHz to 17.7 GHz for both incident left- and right-handed circularly polarized waves. Under oblique incidence, the bandwidth increases as the incident angle varies from 0° to 80°. Moreover, the co-polarization reflection is independent of the incident azimuth angles.
Fund: Project supported by the National Natural Science Foundation of China (Grants Nos. 61331005, 11204378, 11274389, 11304393, and 61302023) and the National Natural Science Foundation of Shaanxi Province, China (Grant Nos. 2011JQ8031 and 2013JM6005).
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