Non-foster impedance matching for electrically small capacitive antennas

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buir.advisorAltıntaş, Ayhan
dc.contributor.authorCanik, Şeyma
dc.date.accessioned2016-07-01T11:10:30Z
dc.date.available2016-07-01T11:10:30Z
dc.date.issued2014
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.descriptionCataloged from PDF version of article.en_US
dc.description.abstractDevice scaling and component-miniaturization are the main drivers of the development of electronic technology. In time, electronic devices have become smaller in size and hence, the scaling down of antenna dimensions has come to be not only an interesting but also substantial areas of research. The gain - bandwidth product of an antenna is limited by its electrical size, therefore reducing the size of an antenna narrows the bandwidth or lowers the gain. The work presented in this thesis contributes to the existing body of research on the structure of electrically small antennas and complications of its design with regard to the fundamental limitations. The large input reactance of electrically small antennas (ESA) are conventionally matched with passive circuits, however, the matching works at a single frequency which shrinks the bandwidth. In previous studies, non-Foster impedance matching which employs active networks of negative inductors and capacitors to overcome the restrictions of gain-bandwidth theory has been examined. In this study, the origins and development of Non-Foster impedance matching is reviewed and its stability issues are discussed. The design and simulation of a negative impedance converter circuit and together with an electrically small disk loaded dipole are presented. In this research, the designed matching circuit is fabricated, measured and its results are analyzed. Additionally, promising future studies and their possible effects in the antenna field are reviewed.en_US
dc.description.degreeM.S.en_US
dc.description.statementofresponsibilityCanik, Şeymaen_US
dc.format.extentxiii, 49 leaves, chartsen_US
dc.identifier.itemidB148380
dc.identifier.urihttp://hdl.handle.net/11693/30011
dc.language.isoEnglishen_US
dc.publisherBilkent Universityen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectMatchingen_US
dc.subjectESAen_US
dc.subjectNon-Fosteren_US
dc.subjectNICen_US
dc.subjectDisk Loaded Dipoleen_US
dc.subject.lccTK7871.6 .C36 2014en_US
dc.subject.lcshAntennas (Electronics).en_US
dc.titleNon-foster impedance matching for electrically small capacitive antennasen_US
dc.typeThesisen_US
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