Size Reduction of Omnidirectional Cylindrical Dielectric Resonator Antenna Using a Magnetic Aperture Source

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

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Original languageEnglish
Article number8859622
Pages (from-to)3248-3253
Journal / PublicationIEEE Transactions on Antennas and Propagation
Issue number4
Online published4 Oct 2019
Publication statusPublished - Apr 2020


For the first time, an annular slot is used to excite the fundamental TM 01 δ mode of a cylindrical dielectric resonator antenna (DRA). The annular slot has eight pairs of meander lines that make the E-field of the slot nearly uniform. The meander lines can introduce an inductance to the antenna and thus, lower the resonant frequency or equivalently reduce the antenna size. To verify the idea, a prototype operating in the fundamental TM 01δ mode was designed, fabricated, and measured for 2.4 GHz WLAN applications (2.40-2.48 GHz). The S-parameters, radiation pattern, realized gain, and total efficiency are simulated and measured, and good agreement between the simulations and measurements is obtained. As compared with a conventional probe-fed TM 01δ-mode cylindrical DRA, our antenna has a size reduction of 43% while providing a measured 10 dB impedance bandwidth of 18.0%.

Research Area(s)

  • Aperture coupling, dielectric resonator antenna (DRA), size reduction, TM mode