A Polarization-Reconfigurable Glass Dielectric Resonator Antenna Using Liquid Metal
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IEEE Transactions on Antennas and Propagation as a Communication.
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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.