Optimum power transfer in RF front end systems using adaptive impedance matching technique

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Publication date
2021-062021-06
Author
Alibakhshikenari, M.Virdee, B.S.
Azpilicueta, L.
See, C.H.
Abd-Alhameed, Raed

Althuwayb, A.A.
Falcone, F.
Huyen, I.
Denidni, T.A.
Limiti, E.
Keyword
LC circuitsImpedance matching networks
Optimum power transfer
Antenna impedance
RF front-end
Transceiver
Rights
© The Author(s) 2021. Open Access 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
YesOpen Access status
GoldAccepted for publication
2021-05-19
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Show full item recordAbstract
Matching the antenna’s impedance to the RF-front-end of a wireless communications system is challenging as the impedance varies with its surround environment. Autonomously matching the antenna to the RF-front-end is therefore essential to optimize power transfer and thereby maintain the antenna’s radiation efficiency. This paper presents a theoretical technique for automatically tuning an LC impedance matching network that compensates antenna mismatch presented to the RF-front-end. The proposed technique converges to a matching point without the need of complex mathematical modelling of the system comprising of non-linear control elements. Digital circuitry is used to implement the required matching circuit. Reliable convergence is achieved within the tuning range of the LC-network using control-loops that can independently control the LC impedance. An algorithm based on the proposed technique was used to verify its effectiveness with various antenna loads. Mismatch error of the technique is less than 0.2%. The technique enables speedy convergence (< 5 µs) and is highly accurate for autonomous adaptive antenna matching networks.Version
Published versionCitation
Alibakhshikenari M, Virdee BS, Azpilicueta L et al (2021) Optimum power transfer in RF front end systems using adaptive impedance matching technique. Scientific Reports. 11: 11825.Link to Version of Record
https://doi.org/10.1038/s41598-021-91355-4Type
Articleae974a485f413a2113503eed53cd6c53
https://doi.org/10.1038/s41598-021-91355-4