Multifunctional coding metasurface based on OAM convolution operation
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.
国家科技期刊平台
NSTL
万方数据
