Yin Jia Yuan, Wan Xiang, Zhang Qian, Cui Tie Jun
1] State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210096, China [2] Synergetic Innovation Center of Wireless Communication Technology, Southeast University, Nanjing 210096, China.
State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210096, China.
Sci Rep. 2015 Jul 23;5:12476. doi: 10.1038/srep12476.
We propose an ultra-wideband polarization-conversion metasurface with polarization selective and incident-angle insensitive characteristics using anchor-shaped units through multiple resonances. The broadband characteristic is optimized by the genetic optimization algorithm, from which the anchor-shaped unit cell generates five resonances, resulting in expansion of the operating frequency range. Owing to the structural feature of the proposed metasurface, only x- and y-polarized incident waves can reach high-efficiency polarization conversions, realizing the polarization-selective property. The proposed metasurface is also insensitive to the angle of incident waves, which indicates a promising future in modern communication systems. We fabricate and measure the proposed metasurface, and both the simulated and measured results show ultra-wide bandwidth for the x- and y-polarized incident waves.
我们提出了一种超宽带偏振转换超表面，它采用锚形单元通过多重共振实现偏振选择和入射角不敏感特性。通过遗传优化算法对宽带特性进行了优化，锚形单元胞产生了五个共振，从而扩展了工作频率范围。由于所提出的超表面的结构特征，只有x偏振和y偏振入射波能够实现高效的偏振转换，实现了偏振选择特性。所提出的超表面对入射波角度也不敏感，这表明其在现代通信系统中有广阔的应用前景。我们制作并测量了所提出的超表面，模拟和测量结果均显示了x偏振和y偏振入射波的超宽带特性。
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