Abstract
This paper presents a bandwidth enhanced broadband patch antenna with differential feed for base stations. The components of the dual-polarized patch antenna include a radiating patch, a top parasitic patch, two pairs of vertical inverted L-shaped probes and a reflector. Through reasonable application of coupling feed and parasitic patch, the impedance bandwidth of the patch antenna has been successfully expanded. The antenna achieves a impedance bandwidth enhanced of 37% ranging from 0.67-0.98 GHz for |S11|<; -15 dB, which is better than the traditional patch antenna. In addition, the proposed antenna has port isolation higher than 38 dB. The realized gain is higher than 7.5 dBi with stable radiation pattern over entire the operating band. These characteristics make it suitable for base station applications.
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