Water-Based Microwave Antennas

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    Abstract

    The interesting properties of water makes it an attractive material platform for many microwave applications including artificial material design, sensing, heating systems and dielectric resonator antennas. Presently, electrically small versions of the latter are considered. We present the numerical and experimental results for an antenna consisting of a short monopole fed against a large conducting ground plane and encapsulated by a water-filled cylindrical cavity. The resonant antenna is designed for 300 MHz operation and is successfully matched to a 50 Ohm transmission line and the surrounding air. The total efficiency is 33.4 % and the reflection coefficient is –28 dB. The reduced efficiency is due to water losses and the small antenna size. A prototype of the antenna was fabricated, and the measurements and numerical predictions exhibit good agreement. Additionally, frequency-tuning by extraction of
    water is investigated.
    Original languageEnglish
    Title of host publicationProceedings of 2020 14th European Conference on Antennas and Propagation
    Number of pages3
    PublisherIEEE
    Publication date2020
    Publication statusPublished - 2020
    Event14th European Conference on Antennas and Propagation - Virtual event, Copenhagen, Denmark
    Duration: 15 Mar 202020 Mar 2020
    https://www.eucap2020.org/

    Conference

    Conference14th European Conference on Antennas and Propagation
    LocationVirtual event
    Country/TerritoryDenmark
    CityCopenhagen
    Period15/03/202020/03/2020
    Internet address

    Keywords

    • Dielectric resonator antenna
    • Water-based
    • Mie resonance

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