Abstract: An apparatus for wireless charging may include a casing for housing an electronic device and a plurality of power receiving elements that can couple to an externally generated magnetic field to wirelessly power or charge a load in the electronic device. At least one of the power receiving elements may comprise an electrically conductive segment of the casing.

Abstract: A reconfigurable wireless power transmit antenna includes an antenna coil configured in a first configuration having a first number of turns configured to operate at a first frequency, the antenna coil configurable in a second configuration having a second number of turns configured to operate at a second frequency, and a switching mechanism configured to switch between the first configuration and the second configuration.

Abstract: Disclosed is an electronic device having a band to secure the electronic device to a user. The electronic device may include a first power receiving element arranged with the band, configured to couple to an externally generated magnetic field to wirelessly receive power. The electronic device may include a second power receiving element arranged along a portion of the band spaced apart from the first power receiving element, configured to couple to the externally generated magnetic field to wirelessly receive power.

Abstract: An apparatus may include an electrically conductive body to magnetically couple to a first magnetic field. A first tuning element may be connected to the electrically conductive body. An electrically conductive coil may be wound about an opening in the electrically conductive body, and configured to magnetically couple to a second magnetic field.

Abstract: An electronic apparatus may include an electrically conductive body configured to magnetically couple to a first magnetic field. A first tuning element may be connected to the electrically conductive body. An electrically conductive coil may be wound about an opening defined by the electrically conductive body, and configured to magnetically couple to a second magnetic field.

Abstract: A wireless power receiver includes a first receive coil configured to generate electrical current in response to a first external magnetic field generated by a transmit coil, and a second receive coil configured to generate electrical current in response to a second magnetic field generated by eddy currents induced in a metal portion of the wireless power receiver in response to the first external magnetic field.

Abstract: An apparatus for wirelessly transmitting charging power is provided. The apparatus comprises a transmit coil configured to generate a wireless charging field for wirelessly transmitting charging power when driven by a current. The apparatus comprises a control circuit configured to cause the transmit coil to transmit a packet via the wireless charging field, wherein the packet comprises information indicative of the presence of the wireless charging field to cause a chargeable device to electrically disconnect a communication circuit from a receive coil within the chargeable device. The control circuit is further configured to cause the transmit coil to transmit the packet periodically based on a predetermined interval. The predetermined interval has a shorter duration than a duration of a communication interval of the communication circuit. The control circuit is further configured to reduce a magnitude of a strength of the wireless charging field during packet transmission.

Abstract: A method and system for providing wireless power transfer via a metal frame by forming a coil conductor from the metal frame from a plurality of holes and a plurality of slits positioned around the metal frame, where the plurality of holes and the plurality of slits are filled with a non-conductive material or open air. The method and system utilize the coil conductor that is connected to transmitter or receiver circuits to enable wireless power transfer and communications.

Abstract: An electronic device is disclosed, having electronic components and a metal case configured to house the electronic components. A power receiving element may be disposed on the metal case near an edge thereof. The power receiving element may couple with a magnetic field that emanates from the edge of the metal case, when the metal case is exposed to an externally generated magnetic field, to wirelessly receive power from the externally generated magnetic field.

Abstract: Disclosed embodiments include magnetically coupling an externally generated magnetic field to a power receiving element arranged with a band that is configured to secure a wearable electronic device to a user. The power receiving element may extend a length of the band and traverse back and forth across a width of the band. Power induced in the power receiving element from the externally generated magnetic field may be generated to produce wirelessly received power for the wearable electronic device.

Abstract: A device having a coupled-feed wideband antenna is provided. The device comprises: a chassis comprising as a ground plane; an antenna feed, a ground side of the antenna feed connected to the ground plane; and, an antenna comprising: a first radiating arm configured for generating a first resonance at a first frequency, the first radiating arm connected to the chassis and hence the ground plane; a second radiating arm configured for generating a second resonance at a second frequency higher than the first frequency, the second radiating arm connected to the ground plane; and a third radiating arm configured for generating a third resonance at a third frequency higher than the second frequency, the first radiating arm capacitively coupled to the third radiating arm, and the third radiating arm connected to a positive side of the antenna feed.

Abstract: Disclosed is an electronic device comprising a plurality of power receiving elements. Each power receiving element may be configured to electromagnetically couple to an externally generated magnetic field to receive power wirelessly. A plurality of switches may be connected to the plurality of power receiving elements. An output circuit may provide wirelessly received power to the electronic device. The plurality of switches may be configured to selectively short circuit at least one of the plurality of power receiving elements.

Abstract: Methods and apparatus are disclosed for wirelessly transmitting power. In one aspect, an apparatus for wireless transmitting power is provided. The apparatus comprises a first metal sheet having a shape that defines a plurality of slots, the plurality of slots inwardly extending from a periphery of the first metal sheet. The apparatus further comprises a coil configured to generate a magnetic field sufficient to charge or power a load, wherein the first metal sheet extends over a width and a length of the coil, and wherein the plurality of slots are configured to at least partially cancel eddy currents generated in the first metal sheet via the magnetic field.

Abstract: A wireless power transmitter that provides wireless power via a magnetic field includes electrical connections for a driving signal and a plurality of coupler loops that divide the current generated by the driving signal. The transmitter can be tuned to provide a distributed magnetic field that is more evenly distributed over the transmitter pad. The currents through different coupler loops can be controlled by the relative impedances of the coupler loops. The coupler loops can take on various shapes, such as substantially concentric circular paths and they may overlap. Impedances can be designed using one or more capacitances. Capacitance between coupler loops can be provided. Feed capacitors might be provided at the electrical connections.

Abstract: In one aspect, an apparatus for wirelessly coupling with other devices is provided. The apparatus includes a metallic cover having a removed portion. The apparatus comprises a first coil substantially wound around the removed portion of the metallic cover and configured to communicate with at least one other device via a communications protocol. The metallic cover comprises a second coil substantially wound around the removed portion of the metallic cover and configured to wirelessly and inductively receive charging power sufficient to charge or power the apparatus from at least one wireless charging power transmitter.

Abstract: An apparatus for wireless power transmission may include several electrically conductive plates separated from each other by slots and arranged to define a charging surface. A current driving circuit disposed among the plurality of electrically conductive plates can be configured to produce a flow of current in one or more of the plurality of electrically conductive plates. Resulting magnetic fields can emanate from the slots to establish a charging area about the charging surface for wireless transfer of power to one or more power receiving via the magnetic fields.

Abstract: A current sensor may include a sense element disposed proximate a conductor. The current sensor may be configured to couple to a first magnetic field generated at the conductor when current flows in the conductor. An output electrically connected to the sense element can produce a signal that is representative of the flow of current in the conductor. The sense element may be oriented in a plane parallel to magnetic field lines of a second magnetic field generated by a load connected to the conductor.

Abstract: A wireless power transfer system includes an inductive transmit antenna, and a capacitive power transfer element, the inductive transmit antenna and the capacitive power transfer element configured to selectively provide inductive power transfer and selectively provide capacitive power transfer.

Abstract: An antenna with a combined bandpass/bandstop filter network is provided. The antenna includes: a first radiating arm connectable to an antenna feed, the first radiating arm configured to resonate at a first frequency; a second radiating arm, the second radiating arm and the first radiating arm, when electrically connected, configured to resonate at a second frequency lower than the first frequency; and, a filter network comprising a bandstop filter and a bandpass filter, the filter network filtering an electrical connection between the first radiating arm and the second radiating arm, the filter network configured to: electrically isolate the first radiating arm from the second radiating arm at the first frequency, and electrically connect the first radiating arm and the second radiating arm at the second frequency.

Abstract: A wireless power transmitter includes a power transmit coil configured to generate a magnetic field for wirelessly coupling charging power to one or more receiver devices, the magnetic field having a magnetic field distribution over an area defining a charging region, a circuit configured to alter the magnetic field generated by the power transmit coil to alter the magnetic field distribution, and a controller operably coupled to the circuit, the controller configured to control the circuit to alter the magnetic field distribution responsive to a detected characteristic of the one or more receiver devices.