A Dual-Band Dual-Polarized Dielectric Resonator Antenna for 5G Base Station Application

A new base station antenna design of dielectric resonator (DR) antenna (DRA) is proposed for fifth generation base station application. The antenna is composed of a cross-shaped DR fed by U-shape microstrip power divider. The overall size of the cross-shape DR is only $0.24\times 0.24\times 0.21\lambda\ (\lambda$ is the the lowest frequency in the air region). By introducing two groups of modes, dual-band characteristic is realized and it will not interfere with other non-operating frequency bands. In order to explain the dual-band operation mechanism, we analyzed the E-field and H-field distribution of the proposed antenna. From simulation, the proposed base station antenna of dielectric resonator offers two band with the respective bandwidth of 11.4% (3.3-3.7) and 6.2% (4.7-5.0) for VSWR < 2 and exhibits extremely low cross-polarization characteristics and stable unidirectional radiation patterns in the operating frequency. These attractive features make the antenna an ideal candidate with further improvement for 5G base station applications.