Abstract
A novel design method of a wideband dual-polarized antenna is presented by using shorted dipoles, integrated baluns, and crossed feed lines. Simulation and equivalent circuit analysis of the antenna are given. To validate the design method, an antenna prototype is designed, optimized, fabricated, and measured. Measured results verify that the proposed antenna has an impedance bandwidth of 74.5% (from 1.69 to 3.7 GHz) for VSWR < 1.5 at both ports, and the isolation between the two ports is over 30 dB. Stable gain of 8–8.7 dBi and half-power beamwidth (HPBW) of 65°–70° are obtained for 2G/3G/4G base station frequency bands (1.7–2.7 GHz). Compared to the other reported dual-polarized dipole antennas, the presented antenna achieves wide impedance bandwidth, high port isolation, stable antenna gain, and HPBW with a simple structure and compact size.
Highlights
With the rapid development of wireless communication systems, dual-polarized antennas are widely adopted owing to their advantages of reducing the multi-path fading and increasing the channel capacity [1]
The top layer consists of two crossed feed lines, which are used to feed the power from the baluns to the radiator
The overlapped impedance bandwidth for both ports is 74.5% for VSWR
Summary
LE-HU WEN 1, STEVEN GAO1, (Senior Member, IEEE), CHUN-XU MAO 2, QI LUO1, (Member, IEEE), WEI HU3, (Member, IEEE), YINGZENG YIN3, (Member, IEEE), AND XUEXIA YANG 4, (Senior Member, IEEE).
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