Omnidirectional linearly and circularly polarized rectangular dielectric resonator antennas

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

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Original languageEnglish
Article number6058614
Pages (from-to)751-759
Journal / PublicationIEEE Transactions on Antennas and Propagation
Issue number2 PART 2
Publication statusPublished - Feb 2012


The rectangular dielectric resonator antenna (DRA) centrally fed by a probe is investigated. Its operating mode is analogous to the TM 011 mode of a cylindrical DRA. The DRA radiates like an electric monopole, generating omnidirectional linearly polarized (LP) fields. Based on this LP design, a novel omnidirectional circularly polarized (CP) DRA is studied for the first time. Slots are introduced to the sidewalls of the DRA, exciting a degenerate mode for the generation of CP fields. To demonstrate the idea, an omnidirectional CP DRA was designed for WLAN (2.4-2.48 GHz) applications. The reflection coefficient, axial ratio (AR), radiation pattern, and antenna gain are studied, and reasonable agreement between the measured and simulated results is observed. © 2011 IEEE.

Research Area(s)

  • Circular polarization (CP), Dielectric resonator antenna (DRA), Omnidirectional antenna, Slot, TM mode