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针对轨道角动量（Orbital Angular Momentum,OAM）在无线通信系统中相位奇点的问题，提出了一种产生矢量OAM波的透射超表面。设计了一种超表面透射单元实现透射极化和相位的调控，并由此单元排布组成透射超表面。采用透射超表面调控透射电磁波的相位和极化在空间中的分布，极化控制为OAM波引入矢量模。仿真分析和测试结果基本吻合，均表明该超表面工作频率为10 GHz，能够将线极化波转换为模态为+1的矢量OAM波，在传播方向上增益为3.9 dBi，消除了中心相位奇点，验证了所提出方案的有效性。
Abstract：To solve the problem of phase singularities of conventional Orbital Angular Momentum(OAM)in wireless communication,a transmission metasurface is presented for generating vector OAM. An element that can control the transmission phase and polarization is designed,and the metasurface is developed by properly arranging this element. The main idea is to manipulate the phase and polarization distributions of waves in space by designing a transmission metasurface,where the polarization control is introduced as vector modes for OAM waves. The simulation analysis is consistent the measurement results,both showing that the metasurface can convert a linear polarized waves into vector OAM waves with mode + 1 at the frequency of 10 GHz,with a gain of3. 9 dBi in the propagation direction. Also the central phase singularity is eliminated and the effectiveness is verified.
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基本信息:
DOI：
中图分类号:TN92
引用信息:
[1]李梦粤,吴茜虹,楼群.基于矢量轨道角动量波的透射超表面设计[J].无线电工程,2024,54(09):2109-2115.
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