Miniaturized Planar Split-Ring Resonator Antenna

Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2009



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A miniaturized planar antenna based on a broadside-coupled split ring resonator excited by an arc-shaped dipole is presented. The excitation dipole acts as a small tuning capacitor in series with a parallel RLC circuit represented by the SRR. The antenna resonance frequency and dimensions a essentially determined by the SRR, while by varying the dipole arm length the input resistance is changed in a wide range, thus matching the antenna to a feed line and compensating for simulation and manufacturing inaccuracies. No additional matching network is required. Theoretically, there is no limit on how small this antenna can be. In practice, the lower bound is set by losses in utilized materials and manufacturing inaccuracies. As an example, an antenna of ka=0.09 was designed, fabricated and tested. Although the initially fabricated antenna prototype had the input impedance of 43 ohms, it was subsequently tuned to 50 ohms simply by cutting out the excessive arm length. This tuning technique is especially useful in practical applications, since it allows the antenna to be tuned in-place and thereby compensate for various inaccuracies as well as for an antenna environment.
Original languageEnglish
Title of host publicationIEEE International Symposium on Antennas and Propagation
Publication date2009
ISBN (print)978-1-4244-3647-7
StatePublished - 2009
EventIEEE International Symposium on Antennas and Propagation - Charleston, SC, United States


ConferenceIEEE International Symposium on Antennas and Propagation
CountryUnited States
CityCharleston, SC
Internet address

Bibliographical note

Copyright: 2009 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

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