A Dual-Band Dual-Polarized MIMO Antenna for 700 MHz and Sub-6 GHz 5G Systems

This paper proposes a dual-band dual-polarized MIMO antenna for 5G systems. To perform this study, a dual-band two-port antenna is designed for operation in 700 MHz (lower band, LB) and between 2.0 and 4.0 GHz (upper band, UB). The UB radiator consists of two crossed double-loop dipoles and the LB bent-dipole element is connected outside the UB element. Simulated and measured results show that the bandwidths of 16% (0.69-0.81 GHz) and 67% (2.0-4.0 GHz), with isolation better than 20 dB, without the additional decoupling structure. The proposed antenna is a good candidate for 5G indoor base station antenna.