A broadband dual-polarized antenna with coupling-resonators for base-station applications

Abstract

A broadband dual-polarized antenna is proposed, which consists of two orthogonal dipoles coupled four L-shaped resonators. The proposed antenna have two resonant modes in the working band, the lower mode is come from the 1/2 dipole itself, while the upper one is attributed to coupling between two orthogonal dipoles. Moreover, the upper mode can be further controlled by coupling four L-shaped resonators to realize more broadband performance for LTE base-station applications. The antenna achieves a impedance bandwidth of 45.5% for SWR<1.5 at both ports, a isolation more than 26dB between ports, and a stable Half-Power Bandwidth (HPBW) of 65.5 °± 2.9 ° over 1.7–2.7GHz band. A good agreement is obtained between the simulation and the measurement results.