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Broadband Parametric Impedance Matching for Small Antennas Using the Bode-Fano Limit: Improving on Chu's Limit for Loaded Small Antennas

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dc.contributor.authorLoghmannia, Pedraen
dc.contributor.authorManteghi, Majiden
dc.date.accessioned2022-03-03T04:13:10Zen
dc.date.available2022-03-03T04:13:10Zen
dc.date.issued2021-07-09en
dc.date.updated2022-03-03T04:13:06Zen
dc.description.abstractIn this work, a parametric up-converter amplifier is introduced as a wideband impedance-matching network. Chu’s limit restricts the minimum Q-factor of unloaded small antennas. However, the practical bandwidth (BW) of small antennas is defined by their loaded Q-factor. By connecting a small antenna to an amplifier with a real input impedance that is several times greater than the radiation resistance of the antenna, we propose increasing the return loss, which leads to a reduction in the loaded Q-factor and an increase in the BW. In addition, a parametric amplifier is used because, in comparison with transistor amplifiers, it offers low-noise characteristics. The gain of the low-noise parametric amplifier compensates for the loss due to the imposed mismatch. Our simulation result shows BW improvements up to 32 times can be accomplished by trading 2 dB of noise figure (NF), compared to the 15 dB suggested by Chu’s limit for a lossy antenna.en
dc.description.versionAccepted versionen
dc.format.extent14 page(s)en
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1109/MAP.2021.3089997en
dc.identifier.eissn1558-4143en
dc.identifier.issn1045-9243en
dc.identifier.issue99en
dc.identifier.orcidManteghi, Majid [0000-0002-1683-569X]en
dc.identifier.urihttp://hdl.handle.net/10919/109011en
dc.language.isoenen
dc.publisherIEEEen
dc.relation.urihttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000733448200001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=930d57c9ac61a043676db62af60056c1en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectEngineering, Electrical & Electronicen
dc.subjectTelecommunicationsen
dc.subjectEngineeringen
dc.subjectAntennasen
dc.subjectLoaded antennasen
dc.subjectQ-factoren
dc.subjectNoise measurementen
dc.subjectReceiving antennasen
dc.subjectMagnetic circuitsen
dc.subjectImpedanceen
dc.subjectBANDWIDTHen
dc.subjectNetworking & Telecommunicationsen
dc.subject0906 Electrical and Electronic Engineeringen
dc.subject1005 Communications Technologiesen
dc.titleBroadband Parametric Impedance Matching for Small Antennas Using the Bode-Fano Limit: Improving on Chu's Limit for Loaded Small Antennasen
dc.title.serialIEEE Antennas and Propagation Magazineen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
dc.type.otherArticleen
dc.type.otherEarly Accessen
dc.type.otherJournalen
pubs.organisational-group/Virginia Techen
pubs.organisational-group/Virginia Tech/Engineeringen
pubs.organisational-group/Virginia Tech/Engineering/Electrical and Computer Engineeringen
pubs.organisational-group/Virginia Tech/All T&R Facultyen
pubs.organisational-group/Virginia Tech/Engineering/COE T&R Facultyen

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