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dc.contributor.authorAhdi Rezaeieh, S.en
dc.contributor.authorAntoniades, Marcos A.en
dc.contributor.authorAbbosh, A. M.en
dc.creatorAhdi Rezaeieh, S.en
dc.creatorAntoniades, Marcos A.en
dc.creatorAbbosh, A. M.en
dc.date.accessioned2019-04-08T07:44:34Z
dc.date.available2019-04-08T07:44:34Z
dc.date.issued2017
dc.identifier.urihttp://gnosis.library.ucy.ac.cy/handle/7/42715
dc.description.abstractA wideband and unidirectional loop antenna with enhanced and stable gain is presented. To reduce the size of the antenna, the loop is loaded with three mu-negative (MNG) metamaterial unit-cells. The proposed unit-cells consist of a series-gap capacitor and a shunt meandered floating inductor. The series capacitive loading is used to excite the zeroth order resonance (ZOR) of the MNG unit-cell, whereas the floating inductor is used to improve impedance matching. To enhance the front-to-back-ratio (FBR) of the antenna and widen its operating bandwidth, the loop is loaded with a tuning slot in the vicinity of the loaded unit-cells. To overcome the low gain of the antenna at frequencies above the ZOR and thus obtain a stable gain, two tightly coupled dumbbell and arc-shaped directors are proposed. The shape and operation of these directors are inspired by the cylindrical capacitor, which achieves higher coupling compared to a planar capacitor with the same area. The antenna achieves a compact size of 0.25λ0× 0.29λ0 with a wide fractional bandwidth of 34% at 0.76-1.07 GHz, and peak measured gain and FBR values of 4.5 dBi and 16 dB, respectively. © 2017 IEEE.en
dc.sourceIEEE Transactions on Antennas and Propagationen
dc.source.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85018507582&doi=10.1109%2fTAP.2017.2671027&partnerID=40&md5=b15fc638fc8e5427a85fbab591df78e3
dc.subjectAntennasen
dc.subjectMetamaterial antennasen
dc.subjectMetamaterialsen
dc.subjectMicrowave antennasen
dc.subjectBandwidthen
dc.subjectSlot antennasen
dc.subjectAntenna arraysen
dc.subjectDirective antennasen
dc.subjectMu-negativeen
dc.subjectCapacitive loadingen
dc.subjectCellsen
dc.subjectCylindrical capacitorsen
dc.subjectCytologyen
dc.subjectFractional bandwidthsen
dc.subjectFront to back ratioen
dc.subjectLoop antennaen
dc.subjectLoop antennasen
dc.subjectMetamaterial antennaen
dc.subjectMu-negative (mng) transmission lineen
dc.subjectOperating bandwidthen
dc.subjectQuasi-yagi antennaen
dc.subjectUnidirectional loopen
dc.subjectZeroth order resonance (zor) antennaen
dc.titleGain Enhancement of Wideband Metamaterial-Loaded Loop Antenna with Tightly Coupled Arc-Shaped Directorsen
dc.typeinfo:eu-repo/semantics/article
dc.identifier.doi10.1109/TAP.2017.2671027
dc.description.volume65
dc.description.issue4
dc.description.startingpage2090
dc.description.endingpage2095
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 Trans Antennas Propagen
dc.contributor.orcidAntoniades, Marcos A. [0000-0002-9699-2387]
dc.gnosis.orcid0000-0002-9699-2387


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