Show simple item record

dc.contributor.authorAntoniades, Marcos A.en
dc.contributor.authorEleftheriades, G. V.en
dc.creatorAntoniades, Marcos A.en
dc.creatorEleftheriades, G. V.en
dc.date.accessioned2019-04-08T07:44:41Z
dc.date.available2019-04-08T07:44:41Z
dc.date.issued2008
dc.identifier.urihttp://gnosis.library.ucy.ac.cy/handle/7/42776
dc.description.abstractAn improved model for analyzing electrically small NRI-TL antennas is proposed, that highlights the methods that enable these antennas to offer a good impedance match and a high radiation efficiency compared to previously reported designs. An even-odd mode analysis reveals that the antenna supports a predominately even-mode current on the vertical vias, allowing the antenna to be modeled using a multiple folded monopole topology, which provides a substantial increase in the radiation resistance of the antenna. This, together with the top-loading effect of the microstrip line on the vias, enables the antenna to be matched to 50 ω without the use of an external matching network, while maintaining a high radiation efficiency. The validity of the proposed model is confirmed with a fabricated prototype, that consists of four microstrip zero-degree NRI-TL unit cells with dimensions of λ0/10 × λ0/10 × λ0/20 over a 0.45λ0 × 0.45λ0 ground plane. The antenna's performance is verified by full-wave simulations and experimental data obtained at 3.1 GHz, which yield a vertical linear electric field polarization, a measured -10 dB return-loss bandwidth of 53 MHz and a measured efficiency of 70%. © 2008 IEEE.en
dc.sourceIEEE Antennas and Wireless Propagation Lettersen
dc.source.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-62249208628&doi=10.1109%2fLAWP.2008.2008773&partnerID=40&md5=8148e93aa73235ac1b90978341d5d1c0
dc.subjectMetamaterial antennasen
dc.subjectMetamaterialsen
dc.subjectRefractive indexen
dc.subjectMonopole antennasen
dc.subjectElectric fieldsen
dc.subjectElectric-field-polarizationen
dc.subjectFull-wave simulationsen
dc.subjectUnit cellsen
dc.subjectMatching networksen
dc.subjectFolded monopoleen
dc.subjectGround planesen
dc.subjectElectronic equipmenten
dc.subjectLight refractionen
dc.subjectMode currentsen
dc.subjectNegative refractive indexen
dc.subjectRefractometersen
dc.subjectElectric field measurementen
dc.subjectElectric lossesen
dc.subjectElectrically small antennasen
dc.subjectEven-odd mode analysisen
dc.subjectExperimental dataen
dc.subjectGood impedance matchen
dc.subjectHigh radiation efficiencyen
dc.subjectImproved modelsen
dc.subjectLoading effectsen
dc.subjectMicrostripesen
dc.subjectRadiation resistanceen
dc.titleA folded-monopole model for electrically small NRI-TL metamaterial antennasen
dc.typeinfo:eu-repo/semantics/article
dc.identifier.doi10.1109/LAWP.2008.2008773
dc.description.volume7
dc.description.issueJournal Articleen
dc.description.startingpage425
dc.description.endingpage428
dc.author.facultyΠολυτεχνική Σχολή / Faculty of Engineering
dc.author.departmentΤμήμα Ηλεκτρολόγων Μηχανικών και Μηχανικών Υπολογιστών / Department of Electrical and Computer Engineering
dc.type.uhtypeArticleen
dc.source.abbreviationIEEE Antennas Wirel.Propag.Lett.en
dc.contributor.orcidAntoniades, Marcos A. [0000-0002-9699-2387]
dc.gnosis.orcid0000-0002-9699-2387


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record