Ultra-wideband and high-efficiency polarization rotator based on metasurface
Ultra-wideband and high-efficiency polarization rotator based on metasurface
复制标题
基于超表面的超宽带高效偏振旋转器
DOI：
10.1063/1.4960355
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发表时间：
2016-08-01
影响因子：
4
通讯作者：
Gong, Shuxi
中科院分区：
文献类型：
--
作者：
Jia, Yongtao;Liu, Ying;Gong, Shuxi
提出了一种基于超表面的超宽带高效极化旋转器。所提出的偏振旋转器的单位单元由两对L形金属贴片印刷在基板上，这是由金属地面支持和覆盖的覆盖层。所述覆盖层由电介质层和印刷在所述电介质层上的一对L形金属贴片组成。当入射电磁波为y-/x-偏振时，该偏振旋转器可以将线偏振电磁波的偏振旋转到其反射后的正交偏振。仿真结果表明，该偏振旋转器在7个不同的频率下都能实现90°的偏振旋转，并且在7.8- 34.7GHz的频率范围内，垂直入射时的偏振转换比都大于0.9。实验结果与模拟结果吻合较好。
An ultra-wideband and high-efficiency polarization rotator based on a metasurface is proposed in this paper. The unit cell of the proposed polarization rotator consists of two pairs of L-shaped metallic patches printed on a substrate, which is backed by a metallic ground and covered by a superstrate. The superstrate is composed of a dielectric layer and a pair of L-shaped metallic patches printed on the dielectric layer. The proposed polarization rotator can rotate the polarization of linearly polarized electromagnetic (EM) wave to its orthogonal counterpart after reflection when the incident EM wave is y-/x-polarized. Simulated results show that the polarization rotator can perform 90° polarization rotation with very high efficiency at seven different frequencies and achieve a polarization conversion ratio higher than 0.9 in the frequency range of 7.8–34.7 GHz at normal incidence. Good agreement between the experimental results and simulated ones has been obtained.