Abstract
A broadband differentially fed slant ±45° dual-polarized stacked patch antenna is presented to cover 2.3–5 GHz for base station applications. In this letter, both semicircular and sector loaded slotlines are employed to generate three resonant frequencies. A slotted ring is utilized to generate a new resonant frequency, and could make the radiation patterns stable at high frequencies. To verify antenna performances, the proposed design is fabricated. From measurement, it is seen that its relative impedance bandwidth achieves 75.9% (2.28–5.07 GHz), and its port isolation reaches more than 35 dB. Moreover, in the whole band, the gain variation is smaller than 0.8 dB. Therefore, the proposed design could provide great candidate for LTE/5G base station applications.
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