Design of a Dual-Polarized Magnetoelectric Dipole Antenna With Gain Improvement at Low Elevation Angle for a Base Station

Abstract

A ±45° dual-polarized broadband magnetoelectric dipole antenna with gain improvement at low elevation angle is proposed in this letter for a base station. The proposed antenna covers 2.45–2.8 GHz, indicating a 13.3% impedance band. In order to improve the gain at ±60° angle, a notched metal wall is employed and the gain of the proposed antenna at ±60°angle is improved by 2 dB over the entire band compared with the original antenna. Moreover, the proposed antenna has good performances with stable radiation patterns, a front-to-back ratio around 20 dB and a cross-polarization discrimination over 15 dB. An antenna prototype is fabricated and measured for verification. A good agreement is met between the simulation and measurement and good performances make it a candidate for a 5G base station.