Dual-Band and Dual-Polarized Microstrip Array Antenna for GSM900/DCS1800 MHz Base Stations

A plusmn45deg slant dual-polarized, dual-band array antenna suitable for use in base station antennas in GSM900 and DCS1800 MHz bands has been proposed. The simulated -14 dB return loss bandwidth is 8.86% and 10.5% for GSM and DCS bands, respectively, and covers both bands. The isolation between ports of more than 30 dB is also obtained. The SLLs are -15 dB and -14 dB for GSM and DCS pattern which have HPBW of 22deg and 21deg at vertical plane and 70deg and 71deg for horizontal plane at GSM and DCS bands. Maximum gain is 12.8 dBi in GSM band and 11.52 dBi in DCS band. The size of the antenna is about 660 times 460 times 20 mm (25.9 times 18.1 times 0.78 inch)