Ultra-broadband co-polarization anomalous reflection metasurface

Abstract

In this paper, an ultra-broadband co-polarization anomalous reflection metasurface was proposed. The metasurface was constructed by two crossed H-shaped metallic pattern, which can be seen as electric dipole resonator. Whether the incident waves were left-handed circularly polarized (LCP) or right-handed circularly polarized (RCP), the co-polarization reflective efficiency was more than 97% over ultra-broadband from 8.17 to 19.3 GHz. It was noticeable that the ultra-broad band was achieved through the superposition of multiple resonance bands. By decomposing the circular polarization (CP) waves into two linear polarization (LP) waves, one of which was x-direction LP wave and the other was y-direction LP wave, the reflective matrix was used to explain the mechanism of high efficient co-polarization reflection. By utilizing the proposed co-polarization reflection unit cell, a kind of phase gradient metasurface was achieved based on Pancharatnam–Berry Phase (PB phase). At last, simulation results and measurement results showed a good accordance, indicating that the proposed metasurface did have great co-polarization anomalous reflection effects.