Wang Xiaoyi, Yang Guo-Min
Opt Express. 2021 Sep 13;29(19):30579-30589. doi: 10.1364/OE.436322.
This paper presents a new design of linear-polarization metasurface converter with arbitrary polarization rotating angle. The linear-polarization conversion is achieved by first separating the linearly polarized incident wave into two orthogonal circularly polarized waves, then adding an additional phase to one of the circularly polarized waves, and finally recombining these two circularly polarized waves into a linearly polarized wave and reflecting it towards free space. A practical unit cell operating at 10 GHz with sandwich structure is applied to realize the linear-polarization metasurface converter, which consists of a top-layer square patch, a middle-layer ground plane, a bottom-layer 90° quadrature hybrid coupler, and two vias connecting the top layer and bottom layer. The proposed linear-polarization metasurface converter is analyzed theoretically and demonstrated by both simulating and experimental results.
本文提出了一种具有任意偏振旋转角度的线性偏振超表面转换器的新设计。线性偏振转换是通过首先将线偏振入射波分离为两个正交圆偏振波，然后向其中一个圆偏振波添加额外的相位，最后将这两个圆偏振波重新组合成一个线偏振波并将其反射向自由空间来实现的。采用了一种工作在10GHz的具有三明治结构的实际单元来实现线性偏振超表面转换器，它由顶层方形贴片、中间层接地平面、底层90°正交混合耦合器以及连接顶层和底层的两个过孔组成。对所提出的线性偏振超表面转换器进行了理论分析，并通过仿真和实验结果进行了验证。
