High-Frequency, High-Power and High-Efficiency Wireless Power Transfer Technologies

The power level of wireless power transfer (WPT) traditionally decreases with increasing operating frequency. The operating region of high-frequency (HF) and high-power (HP) is a generally uncharted territory of WPT.

Mega-Hertz operations pose three technological hurdles: the lack of WPT resonators with precise parameters suitable for mass production; low-loss gate drive and power inverters with low switching losses; and low-loss electromagnetic shielding materials for MHz operation.

This project tackles those problems through three integrated approaches for HF–HP–High Efficiency (HE) WPT applications: new MHz printed-circuit-board resonator structures with high quality factor, new MHz gate-drive circuits for soft-switched power inverters, and low-loss metasurfaces for electromagnetic shielding.