Ultra-wideband circular-polarization converter with micro-split Jerusalem-cross metasurfaces
Ultra-wideband circular-polarization converter with micro-split Jerusalem-cross metasurfaces
复制标题
具有微分裂耶路撒冷十字超表面的超宽带圆偏振转换器
DOI：
10.1088/1674-1056/25/12/128102
复制
发表时间：
2016
影响因子：
1.7
通讯作者：
Yu Xin-Hua
中科院分区：
文献类型：
--
作者：
Gao Xi;Yu Xing-Yang;Cao Wei-Ping;Jiang Yan-Nan;Yu Xin-Hua
提出了一种能将电磁波的线偏振转换为超宽带圆偏振的超薄微分裂耶路撒冷十字亚曲面。通过在耶路撒冷-十字结构的水平臂(x方向)上对称地采用两个微分裂，显著地扩展了所提出的器件的带宽。仿真和实验结果表明，该亚表面能够在12.4 GHz~21 GHz的频率范围内将线偏振波转换为圆偏振波，轴比优于1d B。仿真结果还表明，在较宽的入射角度范围内都能保持这样的宽带和高性能。所提出的偏振转换器可用于许多领域，例如光谱学和无线通信。
An ultrathin micro-split Jerusalem-cross metasurface is proposed in this paper, which can efficiently convert the linear polarization of electromagnetic (EM) wave into the circular polarization in ultra-wideband. By symmetrically employing two micro-splits on the horizontal arm (in the x direction) of the Jerusalem-cross structure, the bandwidth of the proposed device is significantly extended. Both simulated and experimental results show that the proposed metasurface is able to convert linearly polarized waves into circularly polarized waves in a frequency range from 12.4 GHz to 21 GHz, with an axis ratio better than 1 dB. The simulated results also show that such a broadband and high-performance are maintained over a wide range of incident angle. The presented polarization converter can be used in a number of areas, such as spectroscopy and wireless communications.