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A wideband pattern-diversity cylindrical dielectric resonator antenna (DRA) with high isolation is proposed. Based on the equivalent medium principle and the presented DRA structure of wheel shape, the resonant frequency of the HEM11δmode is increased and combined with that of the HEM12δ+1mode to obtain a wide operation band, both of which are excited by a rectangular slot. In addition, the TM01δmode with wideband impedance matching is well excited by a probe in the presented antenna. The TM01δmode with omnidirectional pattern and the HEM11δand HEM12δ+1modes with an unidirectional pattern are utilized to obtain wideband pattern-diversity DRA. For verification, a prototype of the presented DRA was fabricated and measured. The measured overlapped impedance bandwidth is about 30% (3.08–4.16 GHz), and the port isolation is higher than 30 dB. Besides, the envelope correlation coefficient is very low.
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Yang et al. (2023) studied this question.
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