A Broadband \pm 45^ Dual-Polarized Antenna With Y-Shaped Feeding Lines

A broadband ±45 ° 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 p...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2015-02, Vol.63 (2), p.483-490
Main Authors: Chu, Qing-Xin, Wen, Ding-Liang, Luo, Yu
Format: Article
Language:English
Subjects:
Antenna array
Antenna measurements
Antenna radiation patterns
Bandwidth
base station
Broadband antennas
Dipole antennas
dual-polarization
electrical down tilt
Impedance
Resonant frequency
wideband antenna
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Summary:A broadband ±45 ° 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 at both ports, port-to-port isolation 25 dB , a stable radiation pattern with 3-dB beamwidth 68 ° ±2 ° 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 ° ±2.22 ° at H-plane at port 1 and 64.85 ° ±4.96 ° at port 2 with over the operating frequency band. Simulation results have a good agreement with measurement ones.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2014.2381238