Wireless power transfer system rigid to tissue characteristics using metamaterial inspired geometry for biomedical implant applications

Conventional resonant inductive coupling wireless power transfer (WPT) systems encounter performance degradation while energizing biomedical implants. This degradation results from the dielectric and conductive characteristics of the tissue, which cause increased radiation and conduction losses, res...

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Autores principales: Pokharel, Ramesh K., Barakat, Adel, Alshhawy, Shimaa, Yoshitomi, Kuniaki, Sarris, Costas
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7955087/
https://www.ncbi.nlm.nih.gov/pubmed/33712654
http://dx.doi.org/10.1038/s41598-021-84333-3
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author Pokharel, Ramesh K.
Barakat, Adel
Alshhawy, Shimaa
Yoshitomi, Kuniaki
Sarris, Costas
author_facet Pokharel, Ramesh K.
Barakat, Adel
Alshhawy, Shimaa
Yoshitomi, Kuniaki
Sarris, Costas
author_sort Pokharel, Ramesh K.
collection PubMed
description Conventional resonant inductive coupling wireless power transfer (WPT) systems encounter performance degradation while energizing biomedical implants. This degradation results from the dielectric and conductive characteristics of the tissue, which cause increased radiation and conduction losses, respectively. Moreover, the proximity of a resonator to the high permittivity tissue causes a change in its operating frequency if misalignment occurs. In this report, we propose a metamaterial inspired geometry with near-zero permeability property to overcome these mentioned problems. This metamaterial inspired geometry is stacked split ring resonator metamaterial fed by a driving inductive loop and acts as a WPT transmitter for an in-tissue implanted WPT receiver. The presented demonstrations have confirmed that the proposed metamaterial inspired WPT system outperforms the conventional one. Also, the resonance frequency of the proposed metamaterial inspired TX is negligibly affected by the tissue characteristics, which is of great interest from the design and operation prospects. Furthermore, the proposed WPT system can be used with more than twice the input power of the conventional one while complying with the safety regulations of electromagnetic waves exposure.
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spelling pubmed-79550872021-03-15 Wireless power transfer system rigid to tissue characteristics using metamaterial inspired geometry for biomedical implant applications Pokharel, Ramesh K. Barakat, Adel Alshhawy, Shimaa Yoshitomi, Kuniaki Sarris, Costas Sci Rep Article Conventional resonant inductive coupling wireless power transfer (WPT) systems encounter performance degradation while energizing biomedical implants. This degradation results from the dielectric and conductive characteristics of the tissue, which cause increased radiation and conduction losses, respectively. Moreover, the proximity of a resonator to the high permittivity tissue causes a change in its operating frequency if misalignment occurs. In this report, we propose a metamaterial inspired geometry with near-zero permeability property to overcome these mentioned problems. This metamaterial inspired geometry is stacked split ring resonator metamaterial fed by a driving inductive loop and acts as a WPT transmitter for an in-tissue implanted WPT receiver. The presented demonstrations have confirmed that the proposed metamaterial inspired WPT system outperforms the conventional one. Also, the resonance frequency of the proposed metamaterial inspired TX is negligibly affected by the tissue characteristics, which is of great interest from the design and operation prospects. Furthermore, the proposed WPT system can be used with more than twice the input power of the conventional one while complying with the safety regulations of electromagnetic waves exposure. Nature Publishing Group UK 2021-03-12 /pmc/articles/PMC7955087/ /pubmed/33712654 http://dx.doi.org/10.1038/s41598-021-84333-3 Text en © 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/.
spellingShingle Article
Pokharel, Ramesh K.
Barakat, Adel
Alshhawy, Shimaa
Yoshitomi, Kuniaki
Sarris, Costas
Wireless power transfer system rigid to tissue characteristics using metamaterial inspired geometry for biomedical implant applications
title Wireless power transfer system rigid to tissue characteristics using metamaterial inspired geometry for biomedical implant applications
title_full Wireless power transfer system rigid to tissue characteristics using metamaterial inspired geometry for biomedical implant applications
title_fullStr Wireless power transfer system rigid to tissue characteristics using metamaterial inspired geometry for biomedical implant applications
title_full_unstemmed Wireless power transfer system rigid to tissue characteristics using metamaterial inspired geometry for biomedical implant applications
title_short Wireless power transfer system rigid to tissue characteristics using metamaterial inspired geometry for biomedical implant applications
title_sort wireless power transfer system rigid to tissue characteristics using metamaterial inspired geometry for biomedical implant applications
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7955087/
https://www.ncbi.nlm.nih.gov/pubmed/33712654
http://dx.doi.org/10.1038/s41598-021-84333-3
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