A Self-Decoupled Miniaturized Wideband Tri-Port Pattern Diversity Dielectric Resonator Antenna

This letter proposes a miniaturized wideband three-port pattern diversity dielectric resonator antenna (DRA). The antenna works at the sub-6 GHz 5G frequency band, it consists of three Huygens sources, every of which is realized by the superposition of TE1δ1 , TE1δ3 , and TM01δ modes in a rectangular DR, and the monopole mode of the copper pins. A capacitive metasurface tunes together the TE1δ1 and TE1δ3 modes to form a wideband radiation. To obtain a high port isolation, the three elements are located back-to-back. Simulation results indicate that every element has a tilted beam in the frequency band 3.2 GHz to 4.5 GHz, | ${{{\bm{S}}}_{{\bm{ii}}}}$ | ≤ −10 dB, and | ${{{\bm{S}}}_{{\bm{ij}}}}$ | ≤ −18 dB. Finally, a sample antenna is fabricated and measured; the measured results show a good agreement with the simulated results.