基于OAM卷积操作的多功能编码超表面
Multifunctional coding metasurface based on OAM convolution operation
韩明秀 1徐娟1
作者信息
- 1. 曲阜师范大学网络空间安全学院,273165,山东省曲阜市
- 折叠
摘要
提出了一种工作在微波频段且在TE、TM模式下呈现极化不敏感的"H"型傅里叶卷积运算的超表面.在工作频段20 GHz～34 GHz内,其交叉极化的反射幅度大于0.9,且只需改变圆心角和旋转角能够实现2π相移,并且在预先设计的超表面排布下实现了携带轨道角动量(orbital angular momentum,OAM)的涡旋波束.OAM涡旋波束能够有效提高通信容量.通过对超表面进行傅里叶卷积操作,能够对电磁波进行多功能操作,例如涡旋波束异常反射、涡旋波束的分裂等,实现了对涡旋电磁波的有效调控.
Abstract
An"H"type Fourier convolutional metasurface operating in the microwave band is proposed with polarization insensitivity in TE and TM modes.The cross-polarization reflection amplitude is greater than 0.9 in the operating frequency band 20 GHz～34 GHz,and the phase shift of 2π can be achieved by changing only the centroid angle and rotation angle,and the vortex beam carrying orbital angular momen-tum(OAM)is realized under the pre-designed metasurface arrangement.The OAM vortex beam can effec-tively increase the communication capacity.By performing Fourier convolution operation on the metasur-face,multifunctional operations can be performed on the electromagnetic wave,such as abnormal reflection of the vortex beam,splitting of the vortex beam,etc,which realizes the effective regulation of the vortex e-lectromagnetic wave.
关键词
涡旋波/轨道角动量/卷积操作/多功能Key words
vortex wave/orbital angular momentum/convolution operation/multifunction引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据