Dual-frequency Dual-polarized Folded Metasurface for Bessel Beam Based on Time Reversal

In this paper, a dual frequency dual polarized multi-functional folded metasurface(MS) with size $5.1 \lambda_{0} \times 5.1\lambda_{0}(\lambda_{0}$ the wavelength at 10GHz) for Bessel beams is designed based on time reversal. It consists of a transmission-type linear polarization conversion metasurface, a reflection-type linear polarization conversion metasurface, and a x- polarized microstrip antenna feeder. A zero-order x-polarized Bessel beam in transmission mode at 16GHz and one-order y-polarized Bessel beam in reflection mode at 10GHz is designed. The developed MS have the advantages of smaller size, longer non-diffracting propagation distance 400mm, low cross polarization, dual-polarized and dual frequency. It is a great candidate in near field communication, efficient wireless energy transmission.