Abstract
This paper presents a novel compact broadband dual-polarized base station antenna for 2G, 3G, 4G and 5G base station applications. In this design, the radiation structure is made up of a dipole antenna with rectangle slots and circular trimming. The two pair of dipoles are printed on the bottom of the FR4 substrate ( ε <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">r</inf> =4.4) with the thickness of 0.8mm, where the cross feeding-lines are also printed on the top of the substrate. A pair of coax feeds connected to the center of top substrate. The stacked metallic disks are connected by Nylon cylinders. The simulation results by the commercial software HFSS show that the proposed antenna achieves a high port isolation (>-22 dB) and a bandwidth (85.8%) covering 1.71~4.2 GHz (VSWR<2). Moreover, the dual-polarized antenna has an average gain of 6.8dBi. In addition, the overall antenna architecture is simple and easy to fabricate in base stations that can be used in 2G/3G/4G/5G mobile communication systems.
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