Broadband Vertically/Horizontally Dual-Polarized Antenna for Base Stations

Abstract

A broadband vertically/horizontally (V/H) dual-polarized antenna is proposed for mobile communication base stations. The antenna consists of two perpendicularly placed broadband planar antenna elements. By shaping the reflector for V/H dual-polarized antenna, a half-power beam width of 65±8° is achieved for both vertical and horizontal polarization. The V/H dual-polarized antenna has a bandwidth of 48% (1.7–2.75 GHz) for return loss >15 dB, an isolation of 30 dB, and an antenna gain of 9 dBi. An 8-element V/H dual-polarized antenna array is developed, which achieves a bandwidth of 45% (1.7–2.7 GHz) and an antenna gain of 16 dBi, suitable for GSM/UMTS/LTE base stations.