Low-Profile Millimeter-Wave Dual-Frequency Dual-Polarization Circular Airy OAM Multibeams Based on Tensor Holographic Impedance Metasurface

In this paper, dual frequency millimeter-wave circular Airy orbital angular momentum (OAM) beams, which have desired multiplexing frequency, OAM modes and polarizations, are generated by the proposed single layer tensor holographic impedance metasurface with size 25 lambda(0)x25 lambda(0)x0.05 lambda(0) at 30GHz and 30 lambda(0)x30 lambda(0)x0.05 lambda(0) at 36GHz based on an elliptical slot unit. The measured results indicate non-diffracting propagation distance 112 lambda(0) at 30GHz and 145 lambda(0) at 36GHz, autofocusing property and low profile and easy integration. The design method can be used for multifunctional circular Airy OAM beam generation in near-field wireless communication and Wireless power transmission and other scenarios.