DOI: 10.1109/TMTT.2023.3319050   IEEEXplore: https://ieeexplore.ieee.org/document/10274729

Telemetry-capable near-field wireless power transfer (WPT) system that incorporates a flexible, on-body, mu-negative metasurface with a 3x3 array of 10mm x 10mm optimized 6-turn spiral cells

433 MHz (wireless power), 915 MHz (wireless telemetry)

Optimized on-body metsaurface couples and redirects the TX field to the RX in the implanted medical device to improve power transfer efficiency (PTE) and accommodate small misalignments.

Highly efficient near-field WPT system for wirelessly-driven or rechargeable miniaturized implantable medical devices (IMDs).

- 6.91 dB maximum transmission coefficient |S21| at 10 mm (flat metasurface) vs. - 15.8 dB without the metasurface. 20.36% maximum PTE at 10 mm distance vs. 3.37% without the metasurface.