A Broadband +/- 45 degrees Dual-Polarized Antenna With Y-Shaped Feeding Lines

作者：Chu, Qing Xin^*; Wen, Ding Liang; Luo, Yu

来源：IEEE Transactions on Antennas and Propagation, 2015, 63(2): 483-490.

DOI：10.1109/TAP.2014.2381238

• Antenna array
• base station
• dual-polarization
• electrical down tilt
• wideband antenna

A broadband +/- 45 degrees dual-polarized base station antenna is proposed for 2G/3G/LTE bands. The proposed antenna has Y-shaped feeding lines to impart a wide impedance bandwidth to it, and a rectangular box-shaped reflector to enhance its stability in radiation patterns over the operating frequencies. A prototype of the proposed antenna is designed, fabricated, and tested. The measured results show achievement of impedance bandwidth of 45% for SWR < 1.5 at both ports, port-to-port isolation >25 dB, a stable radiation pattern with 3-dB beamwidth 68 degrees +/- 2 degrees at H-plane and V-plane, and a stable antenna gain of 8.2 +/- 0.6 dBi from 1.7 to 2.7 GHz. A broadband dual-polarized antenna array with five elements for the band is developed for base station application. Measurements show achievement of array gain of 14.8 +/- 1.4 dBi, 3-dB beamwidth 66.56 degrees +/- 2.22 degrees at H-plane at port 1 and 64.85 degrees +/- 4.96 degrees at port 2 with SWR < 1.5 over the operating frequency band. Simulation results have a good agreement with measurement ones.

• 出版日期2015-2
• 单位华南理工大学