Generation of Multi-beam Bessel Beams Using a wideband Metasurface based on Spin-decoupled Principle

In this paper, a double-layer reflection metasurface (MS) based on the spin-decoupled principle is used to simultaneously generate Bessel beams with different circular polarized. The bandwidth of the unit designed covers 14-22GHz, with high bandwidth. And Multi-beam Bessel beams were produced at 16GHz. The simulation results show that the generated Bessel beams can maintain diffraction-free with 700mm. The results show that the proposed method of generating Bessel beams has wide potential in imaging and wireless communication.