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    Bandwidth and gain enhancement of composite right/left-handed metamaterial transmission-line planar antenna employing a non foster impedance matching circuit board

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    Abd_Alhameed_et_al_Scientific_Reports (2.400Mb)
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    Publication date
    2021-04
    Author
    Alibakhshikenari, M.
    Virdee, B.S.
    Althuwayb, A.A.
    Azpilicueta, L.
    Ojaroudi Parchin, Naser
    See, C.H.
    Abd-Alhameed, Raed A.
    Falcone, F.
    Huynen, I.
    Denidni, T.A.
    Limiti, E.
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    Keyword
    Composite right/left-handed transmission-line (CRLH-TL) antenna
    Non-Foster impedance matching circuit (NF-IMC)
    Bandwidth and gain enhancement
    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/.
    Peer-Reviewed
    Yes
    Open Access status
    Gold
    
    Metadata
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    Abstract
    The 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.
    URI
    http://hdl.handle.net/10454/18464
    Version
    Published version
    Citation
    Alibakhshikenari 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.
    Link to publisher’s version
    https://doi.org/10.1038/s41598-021-86973-x
    Type
    Article
    Collections
    Engineering and Digital Technology Publications

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