A Polarization-Reconfigurable Glass Dielectric Resonator Antenna Using Liquid Metal

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Original languageEnglish
Article number8649592
Pages (from-to)3427-3432
Journal / PublicationIEEE Transactions on Antennas and Propagation
Issue number5
Online published22 Feb 2019
Publication statusPublished - May 2019


In this communication, we introduce a glass dielectric resonator antenna (DRA) incorporating a liquid-metal polarizer capable of polarization reconfiguration. The polarizer is formed by a type of liquid-metal alloy composed of gallium, indium, and tin. The antenna is capable of generating three different polarizations: a -45° polarization (STATE 1), a +45° polarization (STATE 2), and a y-axis polarization (STATE 3). The glass DRA is designed to operate at 2.4 GHz with a wide effective bandwidth (overlapped impedance bandwidths of the three states) of 18.0% and a high radiation efficiency of more than 80%. The experimental results agree well with the theoretical analyses.

Research Area(s)

  • Glass dielectric resonator antenna (DRA), liquid metal, polarization reconfiguration, polarizer