Low-power high-frequency directional tunable ac magnetic field
AssigneeSan Diego State University (Sdsu) Foundation, Dba San Diego State University Research Foundation
InventorsGeorge YOUSSEF, Scott NEWACHECK
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Abstract
Apparatus for near-field wireless energy transfer. A first layer provides or comprises a piezoelectric phase or a material with or adapted for electromechanical coupling; and a second layer provides or comprises a magnetostrictive phase or a material with or adapted for a magnetomechanical coupling. The second layer is mechanically and/or chemically coupled to the first layer to provide a composite structure.
Claims13
A system for near-field wireless energy transfer, the apparatus comprising:
- a first multilayer composite structure comprising:
- at least one outer layer of a piezoelectric material providing or comprising a piezoelectric phase or a material with or adapted for electromechanical coupling;
- and
- at least one inner layer of a magnetostrictive material providing or comprising a magnetostrictive phase or a material with or adapted for a magnetomechanical coupling;
- wherein said at least outer layer is joined, adherent to or bonded to at least one of said at least one inner layer;
- and
- an electric field generator for applying an electric field to the piezoelectric phase to generate strain.
A method for providing near-field wireless energy transfer, the method comprising:
- providing a multiferroic composite structure comprising:
- a first layer being formed from a material comprising polarized piezoelectric material;
- a second layer formed from a material comprising terbium, dysprosium, and iron alloy;
- and
- a bonding, coupling or adhesive agent bonding, coupling or adhering said first and second layers;
- and
- applying an electric or a magnetic field to the multiferroic composite structure.
Dependencies are inferred from the claim text.