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A Novel Broadband Planar Antenna for 2G/3G/LTE Base Stations

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3 Author(s)
Yuehui Cui ; Sch. of Electron. & Inf. Eng., South China Univ. of Technol., Guangzhou, China ; RongLin Li ; Peng Wang

A novel broadband planar antenna is developed for mobile communication base stations. The antenna is composed of a pair of folded dipoles which are coupling fed by an L-shaped microstrip line. Both the dipoles and the coupling microstrip line are etched on the same substrate. The planar antenna achieves a bandwidth of 53% for return loss} > 15 dBi covering the frequency range 1.65-2.85 GHz for 2G/3G/LTE applications. The antenna gain of the broadband antenna element is about 9 dBi. A 45° dual-polarized planar antenna consisting of two broadband antenna elements is proposed, which achieves a bandwidth of about 50% and an isolation of 30 dB. Two 8-element antenna arrays are developed respectively for the broadband antenna and for the ${pm}45^{circ}$ dual-polarized antenna. Both antenna arrays achieve a bandwidth of more than 58% (1.6-2.9 GHz). The antenna gains achieved for the both antenna arrays are higher than 15.5 dBi. The half-power beam widths in the horizontal plane for the antenna arrays are approximately 65pm ± 10°, suitable for base station applications.

Published in:

Antennas and Propagation, IEEE Transactions on  (Volume:61 ,  Issue: 5 )