A Dual-frequency Dual-beam Antenna Based on Metasurface

In this paper, a dual-frequency dual-beam antenna loaded with metasurface is proposed. Firstly, the feeding unit composed of two printed dipole antenna is used to provide excitation. And then, by loading the metasurface with periodically arranged square rings, two beams steered to different directions are realized and two wider working frequency bands are obtained. At the same time, the beam gains are improved. The results show that the resonant frequencies of the antenna are at 57 GHz and 66 GHz, and the corresponding maximum radiation beam pointing at (φ,θ) = (164°, 90°), (196°, 90°) and (φ, θ= (158°, 90°), (202°, 90°), respectively. Also the gain can reach to 8.2 dBi.