Transforming Surface Wave to Propagating OAM Vortex Wave via Flat Dispersive Metasurface in Radio Frequency
Transforming Surface Wave to Propagating OAM Vortex Wave via Flat Dispersive Metasurface in Radio Frequency
复制标题
射频中通过平坦色散超表面将表面波转换为传播 OAM 涡旋波
DOI：
10.1109/lawp.2017.2779269
复制
发表时间：
2018-01-01
影响因子：
4.2
通讯作者：
Jin, Xiaofeng
中科院分区：
文献类型：
--
作者：
Zhang, Youfei;Lyu, Yang;Jin, Xiaofeng
在这封信中，我们提出了一种方法来产生和转换表面波轨道角动量（OAM）涡旋波使用平坦的色散元表面。超表面单元是一个环形的蝴蝶结贴片，它是专门设计用于控制散射场的相位。每个元表面单元的相位响应被优化以满足产生OAM波所需的相位补偿。工作在10 GHz的超表面阵列产生多个OAM模式的$\ell = 0$，1，和2，分别设计和制造。仿真和实验结果表明，不同的OAM模式可以产生。测试了这些阵列的近场和远场特性，发射和接收测试表明，不同的OAM模式被隔离，使它们可以用于信道复用。
In this letter, we propose an approach to generate and transform surface wave to orbital angular momentum (OAM) vortex wave using flat dispersive metasurface. The metasurface cell is a ring-surrounded bowtie patch, which is specifically designed for controlling the phase of the scattered fields. The phase response of every metasurface cell is optimized to meet the phase compensation required for generating OAM wave. The metasurface array operating at 10 GHz for generating multiple OAM modes of $\ell = 0$ , 1, and 2, respectively, are designed and fabricated. The simulated and experimental results demonstrate that different OAM modes can be generated. The near-field and far-field features of these arrays are measured, and the transmitting and receiving tests show that different OAM modes are isolated so that they can be used for channel multiplexing.