Wideband Glass and Liquid Cylindrical Dielectric Resonator Antenna for Pattern Reconfigurable Design

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)2157-2164
Journal / PublicationIEEE Transactions on Antennas and Propagation
Issue number5
Online published1 Mar 2017
Publication statusPublished - May 2017


A mode reconfigurable dielectric resonator antenna (DRA) to realize radiation pattern reconfiguration is presented for the first time. The DRA is composed of two zones: the inner zone is a solid cylinder fabricated by K9 glass (ϵr = 6.85) and the outer zone is filled with a dielectric liquid-ethyl acetate (ϵr = 7.1). Both of them are put into a cylindrical container fabricated by 3-D printing technology and excited by a single coaxial probe. The inner glass DRA is excited in its broadside HEM11δ mode when the ethyl acetate is pumped out, while the conical TM01δ mode is excited in the reconstituted cylindrical DRA when the ethyl acetate is pumped in. Consequently, a mechanical reconfiguration of broadside and conical radiation patterns can be achieved over a wide impedance bandwidth of 35.5% from 3.75 to 5.37 GHz. For demonstration, the reconfigurable DRA was fabricated and measured. The measured results of the standing wave ratio, radiation pattern, gain, and efficiency are discussed. Reasonable agreement between the measured and simulated results is observed.

Research Area(s)

  • 3-D printing technology, broadside beam, conical beam, liquid dielectric resonator antenna (DRA), pattern reconfigurable DRA