Dynamic millimeter-wave OAM beam generation through programmable metasurface

Abstract Millimeter-wave (mmWave) and orbital angular momentum (OAM) multiplexing are two key technologies for modern wireless communications, where significant efforts have been devoted to combining these extremely high channel capacities. Recently, programmable metasurfaces extensively studied stimulating dynamic multi-mode OAM beams, owing their ability of subtle modulation over electromagnetic waves in a digital manner. However, mmWave stimulation rarely mentioned, due the requirement processing precision applications. In this paper, metasurface is presented stimulate vortex beams. The proposed composed electronically reconfigurable units, which obtained through configuration integration PIN diode within each radiation patch modulating unit resonant property. Both low reflection losses stabilized inverse phase states binary coding operation band. Through real-time distribution on by bias circuit, generation beams with mode numbers l = 0, +1, +2, +3 numerically designed experimentally verified. Our study paves new perspective cross amalgamation both technologies.