Safety Analysis of Metasurface-Based Near-field Wireless Power Transfer System for Deep Implant
arXiv:2607.29187 · doi:10.1109/WPTCE56855.2023.10215987
Abstract
Wireless power transfer is a method for energizing future implantable medical electronics. In this study, a metasurface-based near-field magnetic wireless power transfer system for deep implants is presented, and electromagnetic safety parameters, including field distributions, specific absorption rate (SAR), and temperature variations, are evaluated. The power transfer is modeled for a receiver implant at a distance of 8.5 cm from the designed metasurface. Based on the results, a maximum localized SAR of 0.072 mW/kg is achieved when the efficiency is 1.62%. Moreover, continuous power transfer shows that the local tissue temperature rises by less than 1.1 degrees Celsius.
5 pages, 7 figures, 3 tables. Funded by Research Council of Norway (grant 287112), South-Eastern Norway Regional Health Authority (grant 2020049), and B-CRATOS Horizon 2020 FET-OPEN (grant 965044)