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Ultra-wideband reflective polarization converter based on anisotropic metasurface |
Jia-Liang Wu(吴家梁), Bao-Qin Lin(林宝勤), Xin-Yu Da(达新宇) |
Information and Navigation College, Air Force Engineering University, Xi'an 710077, China |
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Abstract In this paper, we propose an ultra-wideband reflective linear cross-polarization converter based on anisotropic metasurface. Its unit cell is composed of a square-shaped resonator with intersectant diagonal and metallic ground sheet separated by dielectric substrate. Simulated results show that the converter can generate resonances at four frequencies under normal incident electromagnetic (EM) wave, leading to the bandwidth expansion of cross-polarization reflection. For verification, the designed polarization converter is fabricated and measured. The measured and simulated results agree well with each other, showing that the fabricated converter can convert x- or y-polarized incident wave into its cross polarized wave in a frequency range from 7.57 GHz to 20.46 GHz with a relative bandwidth of 91.2%, and the polarization conversion efficiency is greater than 90%. The proposed polarization converter has a simple geometry but an ultra wideband compared with the published designs, and hence possesses potential applications in novel polarization-control devices.
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Received: 17 December 2015
Revised: 04 April 2016
Accepted manuscript online:
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PACS:
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81.05.Xj
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(Metamaterials for chiral, bianisotropic and other complex media)
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42.25.Bs
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(Wave propagation, transmission and absorption)
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41.20.Jb
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(Electromagnetic wave propagation; radiowave propagation)
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Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 61471387, 61271250, and 61571460). |
Corresponding Authors:
Jia-Liang Wu
E-mail: wujia2538@126.com
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Cite this article:
Jia-Liang Wu(吴家梁), Bao-Qin Lin(林宝勤), Xin-Yu Da(达新宇) Ultra-wideband reflective polarization converter based on anisotropic metasurface 2016 Chin. Phys. B 25 088101
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