Compact dual-band dual-polarized antenna enabled by a CSRR loaded metasurface

In this paper, the design of a compact dual-band dual-polarized antenna with unidirectional radiation patterns is introduced. The metasurface, loaded with complementary split ring resonators (CSRRs) not only converts the linearly polarized (LP) signal radiated by the monopole antenna to a circularly polarized (CP) signal in the broadside direction, but also provides dual-band dual-polarized functionality. Based on full-wave simulations, it is found that the proposed antenna can achieve RHCP and LHCP within the first and the second operational band respectively with moderate gain performance around 6 dBi and high front-to-back ratio (FBR).