Stub-loaded broadband dual-polarized antenna for 2G/3G/LTE base stations

摘要

A stub-loaded wideband dual-polarized antenna is proposed, which is composed of two orthogonal cross loop dipoles, branch-shaped coupling feed line and a box-shaped reflector. The stub inside the loop dipoles are adopted to enhance the impedance bandwidth. A new resonate mode is induced in the higher frequency by using the stub. Therefore, the impedance bandwidth is greatly expanded. Design, simulated and experiment of the proposed antenna is presented. Measured results shown an enhanced bandwidth of 57.5% (1.67-3GHz) for |S11|<;-15dB.