A Dual-Band and Dual-Polarized Antenna Array for 2G/3G/LTE Base Stations

摘要

A dual-band antenna array is proposed for the application of base stationrn(BS) in 2G/3G/long term evaluation (LTE) mobile communications. This antenna consists ofrntwo independent ±45° dual-polarized arrays, one of which operates from 1.71 to 2.17 GHz,rnand the other of which is designed from 2.5 to 2.69 GHz. The proposed BS antenna arrayrnhas a high isolation of greater than 29 dB and high front-to-back ratio of more than 26 dBrnat the operating frequencies. The measured peak gain is 17.9 and 18.1 dBi for the lowerrnand upper bands, respectively, and the cross polarizations isolation (CPI)(within ±60° ofrnthe mainlobe) is 16 dB lower than the broadside co-polarization. It was confirmed that thernproposed antenna array meets the communication standards in China.