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

被引:38
|
作者
Pokharel, Ramesh K. [1 ]
Barakat, Adel [1 ]
Alshhawy, Shimaa [1 ]
Yoshitomi, Kuniaki [1 ]
Sarris, Costas [2 ]
机构
[1] Kyushu Univ, Grad Sch Informat Sci & Elect Engn, Nishi Ku, Fukuoka 8190395, Japan
[2] Univ Toronto, Edward S Rogers Sr Dept Elect & Comp Engn, Toronto, ON M5S 3G4, Canada
基金
日本学术振兴会;
关键词
DESIGN; OPTIMIZATION; EFFICIENCY; FIELD; LINK; SLAB;
D O I
10.1038/s41598-021-84333-3
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
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.
引用
收藏
页数:10
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