Wide-Beamwidth Uni-Lateral Dielectric Resonator Antenna Using Higher-Order Mode

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Original languageEnglish
Pages (from-to)93-97
Journal / PublicationIEEE Antennas and Wireless Propagation Letters
Issue number1
Online published15 Nov 2018
Publication statusPublished - Jan 2019


For the first time, a uni-lateral rectangular dielectric resonator antenna (DRA) is designed using two DR modes, namely the fundamental TExδ11 mode and higher-order TEx2δ1 mode. The former and latter provide the broadside and quasi-omnidirectional radiation patterns, respectively. By combining the radiation fields of the two resonant modes, uni-lateral radiation with wide 3-dB beamwidths can be obtained. For demonstration, a uni-lateral rectangular DRA was designed in 2.4-GHz WLAN band. Across the WLAN band, the DRA has a measured front-to-back ratio (FTBR) of higher than 15 dB. It is found that the measured maximum FTBR of the DRA is 36.6 dB, whereas the measured 3-dB beamwidths of the two principal radiation planes are both wider than 174°.

Research Area(s)

  • Dielectric resonator antenna, higher-order mode, unidirectional radiation