OAM‐Based Multiplexed Communication System With a Reflective Metasurface

ABSTRACT

This paper presents a reflective metasurface that enables simultaneous orbital angular momentum (OAM) mode division and polarization‐division multiplexing for high‐capacity wireless communication systems. Through a symmetric unit design, the metasurface is capable of generating four coaxial OAM beams with two orthogonal polarizations, thereby demonstrating high‐purity dual‐mode and dual‐polarization operation. The performance of the metasurface is verified via simulation and experimental approaches, which demonstrate interference‐free OAM multiplexing and excellent mode and polarization isolation within the 5G frequency band.Based on this metasurface, separate dual‐mode and dual‐polarization wireless communication experiments are demonstrated, verifying the independent transmission capability of the OAM‐mode and polarization channels. A projected aggregate raw throughput of 1.6008 Gbit/s can be expected if all four independent channels operate with 66.7‐Mbaud 64‐QAM signals.