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dc.contributor.authorAlibakhshikenari, M.
dc.contributor.authorVirdee, B.S.
dc.contributor.authorAlthuwayb, A.A.
dc.contributor.authorAzpilicueta, L.
dc.contributor.authorOjaroudi Parchin, Naser
dc.contributor.authorSee, C.H.
dc.contributor.authorAbd-Alhameed, Raed A.
dc.contributor.authorFalcone, F.
dc.contributor.authorHuynen, I.
dc.contributor.authorDenidni, T.A.
dc.contributor.authorLimiti, E.
dc.date.accessioned2021-04-11T13:13:46Z
dc.date.accessioned2021-05-13T15:19:55Z
dc.date.available2021-04-11T13:13:46Z
dc.date.available2021-05-13T15:19:55Z
dc.date.issued2021-04
dc.identifier.citationAlibakhshikenari M, Virdee BS, Althuwayb AA et al (2021) Bandwidth and gain enhancement of composite right/left-handed metamaterial transmission-line planar antenna employing a non foster impedance matching circuit board. Scientific Reports. 11: 7472.en_US
dc.identifier.urihttp://hdl.handle.net/10454/18464
dc.descriptionYesen_US
dc.description.abstractThe paper demonstrates an effective technique to significantly enhance the bandwidth and radiation gain of an otherwise narrowband composite right/left-handed transmission-line (CRLH-TL) antenna using a non-Foster impedance matching circuit (NF-IMC) without affecting the antenna's stability. This is achieved by using the negative reactance of the NF-IMC to counteract the input capacitance of the antenna. Series capacitance of the CRLH-TL unit-cell is created by etching a dielectric spiral slot inside a rectangular microstrip patch that is grounded through a spiraled microstrip inductance. The overall size of the antenna, including the NF-IMC at its lowest operating frequency is 0.335λ0 × 0.137λ0 × 0.003λ0, where λ0 is the free-space wavelength at 1.4 GHz. The performance of the antenna was verified through actual measurements. The stable bandwidth of the antenna for |S11|≤ - 18 dB is greater than 1 GHz (1.4-2.45 GHz), which is significantly wider than the CRLH-TL antenna without the proposed impedance matching circuit. In addition, with the proposed technique the measured radiation gain and efficiency of the antenna are increased on average by 3.2 dBi and 31.5% over the operating frequency band.en_US
dc.description.sponsorshipThis work is partially supported by RTI2018-095499-B-C31, Funded by Ministerio de Ciencia, Innovación y Universidades, Gobierno de España (MCIU/AEI/FEDER,UE), and innovation programme under grant agreement H2020-MSCA-ITN-2016 SECRET-722424 and the financial support from the UK Engineering and Physical Sciences Research Council (EPSRC) under grant EP/E022936/1.en_US
dc.language.isoenen_US
dc.relation.isreferencedbyhttps://doi.org/10.1038/s41598-021-86973-xen_US
dc.rights© The Author(s) 2021. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.en_US
dc.subjectComposite right/left-handed transmission-line (CRLH-TL) antennaen_US
dc.subjectNon-Foster impedance matching circuit (NF-IMC)en_US
dc.subjectBandwidth and gain enhancementen_US
dc.titleBandwidth and gain enhancement of composite right/left-handed metamaterial transmission-line planar antenna employing a non foster impedance matching circuit boarden_US
dc.status.refereedYesen_US
dc.date.Accepted2021-03-22
dc.date.application2021-04-02
dc.typeArticleen_US
dc.type.versionPublished versionen_US
dc.date.updated2021-04-11T12:14:00Z
refterms.dateFOA2021-05-13T15:20:58Z
dc.openaccess.statusGolden_US


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