Transmissive Metasurface for Generating Vortex Waves

In recent years, metasurfaces have developed rapidly as two-dimensional electromagnetic control devices, especially transmissive metasurfaces. In this paper, a transmissive metasurface is designed to realize the excitation of the vortex beam, and then the performance of the vortex beam is verified by simulation and measurement. Finally, a communication system was built on LABVIEW, and the wireless communication based on vortex beam was verified by combining it with the general software-defined radio peripheral USRP for wireless communication and measuring the bit error rate. In this paper, the amplitude of the transmission coefficient of the mtea-atom is higher than 0.75, the phase is 0~360° coverage, the purity of the vortex wave mode generated is higher than 65%, and the operation is in the C-band with a bandwidth of 100MHz.