Dual-Polarized OAM Beams Generation Using Huygens' Metasurface

Abstract

The efficient generation of dual-polarized orbital angular momentum (OAM) beam is reported based on an ultrathin Huygens' metasurface. The simulation results show that the dual-polarized vortex wave with $\boldsymbol{l=1}$ mode can be generated efficiently on a double-layer metallic structure at 28 GHz with a narrow divergence angle of about $\pm 4^{\mathrm{o}}$. Moreover, this metasurface has additional advantages of high gain and low assembly cost. A new perspective for OAM vortex antennas is exhibited by this work.