Design of Transmissive Metasurface Based on Vector OAM Waves
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 of 3.9 dBi in the propagation direction.Also the central phase singularity is eliminated and the effectiveness is verified.
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