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

Abstract 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 lo...

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Autores principales:	Ramesh K. Pokharel, Adel Barakat, Shimaa Alshhawy, Kuniaki Yoshitomi, Costas Sarris
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/564b1c55a88e48758b3313726645919c
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spelling	oai:doaj.org-article:564b1c55a88e48758b3313726645919c2021-12-02T13:15:56ZWireless power transfer system rigid to tissue characteristics using metamaterial inspired geometry for biomedical implant applications10.1038/s41598-021-84333-32045-2322https://doaj.org/article/564b1c55a88e48758b3313726645919c2021-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-84333-3https://doaj.org/toc/2045-2322Abstract 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.Ramesh K. PokharelAdel BarakatShimaa AlshhawyKuniaki YoshitomiCostas SarrisNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Ramesh K. Pokharel Adel Barakat Shimaa Alshhawy Kuniaki Yoshitomi Costas Sarris Wireless power transfer system rigid to tissue characteristics using metamaterial inspired geometry for biomedical implant applications
description	Abstract 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.
format	article
author	Ramesh K. Pokharel Adel Barakat Shimaa Alshhawy Kuniaki Yoshitomi Costas Sarris
author_facet	Ramesh K. Pokharel Adel Barakat Shimaa Alshhawy Kuniaki Yoshitomi Costas Sarris
author_sort	Ramesh K. Pokharel
title	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_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_sort	wireless power transfer system rigid to tissue characteristics using metamaterial inspired geometry for biomedical implant applications
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/564b1c55a88e48758b3313726645919c
work_keys_str_mv	AT rameshkpokharel wirelesspowertransfersystemrigidtotissuecharacteristicsusingmetamaterialinspiredgeometryforbiomedicalimplantapplications AT adelbarakat wirelesspowertransfersystemrigidtotissuecharacteristicsusingmetamaterialinspiredgeometryforbiomedicalimplantapplications AT shimaaalshhawy wirelesspowertransfersystemrigidtotissuecharacteristicsusingmetamaterialinspiredgeometryforbiomedicalimplantapplications AT kuniakiyoshitomi wirelesspowertransfersystemrigidtotissuecharacteristicsusingmetamaterialinspiredgeometryforbiomedicalimplantapplications AT costassarris wirelesspowertransfersystemrigidtotissuecharacteristicsusingmetamaterialinspiredgeometryforbiomedicalimplantapplications
_version_	1718393331727204352

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

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