A Wideband Polarization-Reconfigurable Water Dielectric Resonator Antenna

作者：Min Wang, Qing‐Xin Chu · 发表于：IEEE Antennas and Wireless Propagation Letters · 年份：2019 · DOI：10.1109/lawp.2019.2892503 · 被引用次数：68 · 研究领域：Antenna Design and Analysis、Microwave Engineering and Waveguides、Energy Harvesting in Wireless Networks

A water dielectric resonator antenna with reconfiguration and broadband characteristics is presented. By injecting pure water into various cavities of the Plexiglass holder, the antenna can be switched among left-hand circular polarization, right-hand circular polarization, and linear polarization in almost the same operating frequency range. With the high relative permittivity, water acts as a dielectric resonator as well as an interface similar to electric wall to form a broad axial-ratio bandwidth. Thus, a broad usable bandwidth is measured to be over 22%, and the measured radiation efficiency and realized gain centralize in 60%-70% and 3-4 dBi, respectively.