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

Claim 11:
12. A method for wireless power transfer communications comprising:
providing a transmitter comprising a transmitter coil coupled to a power source;
positioning a transmitter metasurface slab positioned on a front side of the transmitter coil, wherein the transmitter metasurface slab is configured to amplify and focus a magnetic field generated by the transmitter coil towards a receiver in a non-contact manner;
providing the receiver, wherein the receiver comprises a receiver coil coupled to a load; and
positioning a receiver metasurface slab on a front side of the receiver coil, wherein the receiver metasurface slab is 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 receiver metasurface slab comprises 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.