Miniaturized Dual-Polarized Antenna with High Isolation Based on Spoof Plasmonic Metamaterial for 5G Application

The structure based on spoof surface plasmon polaritons (SSPPs) exhibits higher phase constant, which can make it possible to reduce structure size effectively. In this paper, a miniaturized dual-polarized antenna based on SSPPs is proposed. According to the slow-wave characteristic of SSPPs, the total antenna size is reduced to $0.4 \lambda_{0} \times 0.4 \lambda_{0}$. The miniaturized antenna with feeding network is designed completely and its good ± 45° radiation performance and high isolation level of over 30 dB are verified by simulations.