Compact Dual-Polarized Dipole Antenna Design for Base Station Applications

Abstract

A small-size dual-polarized dipole antenna for base station applications is presented in this paper. The proposed antenna consists of three parts: main radiator, feeding baluns, and reflector. By optimizing the shape of the slot of the dipole, it is possible to obtain compact high-gain antenna designs because antenna aperture efficiency might be improved through adjusting the current distribution. Meanwhile, four bent arms could be used to further decrease the antenna size through extending the current path. Measured results show that the return loss of the proposed antenna is more than 14.5 dB over the band of 3.4 GHz-3.6 GHz, and the isolation is higher than 27 dB. Moreover, antenna gain is higher than 8 dBi, and half power beamwidth (HPBW) is 65°±5°. The proposed antenna can be used in the fifth generation (5G) mobile communication systems.