Patent ID: 11888327
Assignee: UNIVERSITY OF FLORIDA RESEARCH FOUNDATION, INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A wireless power transfer system comprising:
a transmitter comprising (i) a transmitter coil coupled to a power source and (ii) a transmitter metasurface slab positioned on a front side of the transmitter coil that is configured to amplify and focus a magnetic field generated by the transmitter coil towards a receiver in a non-contact manner; and
the receiver comprising (i) a receiver coil coupled to a load and (ii) a receiver metasurface slab positioned on a front side of the receiver coil configured to amplify and focus a magnetic field generated by the transmitter coil towards the receiver coil in a non-contact manner,
wherein the receiver metasurface slab is configured to operate in a magnetic resonance coupling wireless power transfer mode at a near-field frequency band and operate in a radiative wireless power transfer mode at a far-field frequency band for wireless power transfer based on a current distance between the receiver and the transmitter,
wherein the transmitter metasurface slab and the receiver metasurface slab each comprise an array of metasurface unit cells,
wherein the receiver metasurface slab has a capacitor connected to each of the metasurface unit cells in parallel, wherein a value of the capacitor is selected to tune a resonant operating frequency of the receiver to the near-field frequency band, wherein for the selected value of the capacitor, the receiver metasurface slab operates in both the magnetic resonance coupling wireless power transfer mode at the near-field frequency band and the radiative wireless power transfer mode at the far-field frequency band for wireless power transfer,
wherein a dimension of the receiver coil determines a resonant operating frequency of the receiver for the far-field frequency band.