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dc.contributor.authorAntoniades, Marcos A.en
dc.contributor.authorRezaeieh, S. A.en
dc.contributor.authorAbbosh, A. M.en
dc.creatorAntoniades, Marcos A.en
dc.creatorRezaeieh, S. A.en
dc.creatorAbbosh, A. M.en
dc.description.abstractCompact, wideband and unidirectional loop antennas are presented, that are based on a conventional planar loop antenna that is loaded in a mu-negative (MNG) fashion with series capacitors, enabling a mu-zero (MZR) resonance to be excited. This, together with the inherent loop resonance and a third resonance introduced by a director element, result in a wide impedance bandwidth and enhanced directivity. Two variants of the MNG-loaded loop antenna are presented; one with a uniform distribution of the MNG-unit cells, and one with a non-uniform distribution. It is shown that both antennas, which have a compact size, achieve a wide operating bandwidth in excess of 50% in the range of 0.6 to 1.1 GHz in the lower UHF band. The uniformly loaded antenna has a measured gain of 3.2 dBi, while the non-uniformly loaded antenna has a higher measured gain of 4.8 dBi. Both antennas have high front-to-back ratios in the range of 10 dB throughout the operating band. © 2017 IEEE.en
dc.publisherInstitute of Electrical and Electronics Engineers Inc.en
dc.source2017 International Workshop on Antenna Technology: Small Antennas, Innovative Structures, and Applications, iWAT 2017en
dc.source2017 International Workshop on Antenna Technology: Small Antennas, Innovative Structures, and Applications, iWAT 2017en
dc.subjectMetamaterial antennasen
dc.subjectMicrowave antennasen
dc.subjectElectric impedanceen
dc.subjectMetamaterial antennaen
dc.subjectLoop antennaen
dc.subjectLoop antennasen
dc.subjectOperating bandwidthen
dc.subjectUnidirectional loopen
dc.subjectDirectivity enhancementen
dc.subjectHigh front-to-back ratiosen
dc.subjectMu-negative (mng) antennaen
dc.subjectMu-zero (mzr) antennaen
dc.subjectNon-uniform distributionen
dc.subjectUniform distributionen
dc.subjectWide impedance bandwidthsen
dc.titleBandwidth and directivity enhancement of metamaterial-loaded loop antennas for microwave imaging applicationsen
dc.description.endingpage252Πολυτεχνική Σχολή / Faculty of EngineeringΤμήμα Ηλεκτρολόγων Μηχανικών και Μηχανικών Υπολογιστών / Department of Electrical and Computer Engineering
dc.type.uhtypeConference Objecten
dc.contributor.orcidAntoniades, Marcos A. [0000-0002-9699-2387]

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