Tunability of Liquid Dielectric Resonator Antennas

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Title Tunability of Liquid Dielectric Resonator Antennas
Author O'Keefe, Steven Gregory; Kingsley, Simon P.
Journal Name IEEE Antennas and Wireless Propagation Letters
Year Published 2007
Place of publication United States
Publisher IEEE
Abstract Dielectric resonator antennas (DRAs) have in the past been used most often at frequencies in the GHz portion of the spectra. This paper presents a novel 50 MHz DRA that uses water as the dielectric. For purposes of keeping the antenna tuned to a specific frequency, and for using the antenna at different frequencies, this antenna can utilise a pump to alter the level of water in the DRA thus altering its resonant frequency. An electronic technique for retuning the feed probe is also presented where varactor diodes are biased to provide a good impedance match across a range of approximately 50 to 100 MHz. These antennas may provide a compact solution at lower frequencies especially where a directional pattern may be required. The liquid dielectric not only provides frequency tuning but simple deployment and a reducible radar crosssection.
Peer Reviewed Yes
Published Yes
Publisher URI http://www.ieee.org/
Alternative URI http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=7727
Copyright Statement Copyright 2007 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Volume 6
Page from 533
Page to 536
ISSN 1536-1225
Date Accessioned 2008-03-03
Language en_AU
Faculty Faculty of Science, Environment, Engineering and Technology
Subject Antenna Technology
URI http://hdl.handle.net/10072/17872
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1

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