Tunable wireless power device

摘要

Exemplary embodiments are directed to wireless power devices. A device may include a transmit antenna and a metallic structure spaced from and configured for detuning the transmit antenna. The device may further include a circuit for tuning the transmit antenna.

主权项

1. A device for providing wireless power, comprising:
a transmit antenna configured to wirelessly transmit power via a magnetic field at a level sufficient to power or charge a chargeable device; a metallic structure spaced at a non-zero distance and physically isolated from the transmit antenna, and configured to:
induce eddy currents to detune the transmit antenna, the eddy currents creating a magnetic field that opposes a change in the magnetic field generated by the transmit antenna, andshield the transmit antenna from another metallic structure to reduce eddy currents generated in the other metallic structure; a magnetic material positioned between the transmit antenna and the metallic structure; and a circuit configured to tune the transmit antenna in the presence of the metallic structure, the transmit antenna, the metallic structure, the magnetic material and the circuit integrated together.