A circuit includes a coupling structure and a first inductive device. The coupling structure includes two or more conductive loops and a set of conductive paths electrically connecting the two or more conductive loops. The first inductive device is magnetically coupled with a first conductive loop of the two or more conductive loops.

A wireless power charging device includes a coil configured to transmit or receive a wireless power signal; an electromagnetic wave shielding sheet disposed proximate the coil; and, a heat radiation layer disposed on the electromagnetic wave shielding sheet.

A shield for a toroidal transformer that includes a toroidal assembly that comprises a toroidal magnetic core and a first winding includes a sheet of flexible non-magnetic conductive material. The sheet of flexible non-magnetic conductive material comprises a trunk portion extending along a longest dimension of the sheet of flexible non-magnetic conductive material and configured to wrap along an outer dimension of the toroidal assembly, and a plurality of fingers extending outwardly from the trunk portion and configured to wrap around portions of the first winding along portions of sides of the toroidal assembly in a direction towards the center of the toroidal magnetic core and folding into an inner dimension of the toroidal assembly.

Fabricating composite monolithic structures to achieve optimal electrical, thermal, and mechanical properties through the elimination of air is discussed herein. A method of fabricating a composite structure includes coating an insulating layer with an uncured binding material and performing a first curing process on the uncured binding material to form a first stage cured binding material on the insulating layer without introduction of air pockets in a conventional manufacturing atmospheric environment. The method further includes disposing the insulating layer on an array of conductive structures. The first stage cured binding material is positioned between the insulating layer and the array of conductive structures. The method further includes performing a second curing process on the first stage cured binding material to form a cured binding material, and forming cured regions between adjacent conductive structures of the array of conductive structures.

A wireless charging receiving device for receiving power from a power transmitting device of wireless charging including a body having an accommodation space and a slot, an induction coil and an electromagnetic absorption member in the accommodation space, and a power storage module is provided. At least a portion of the body has a metal shell corresponded to the accommodation space. The slot disposed in the metal shell connects the accommodation space and an exterior edge of the metal shell. The induction coil is insulatedly abutted against the metal shell and electrically connected with the power storage module. The power transmitting device magnetically resonates with the metal shell through generating an electromagnetic field. The metal shell generates an induced current and an electromagnetic field along the slot, and power converted from the energy of the electromagnetic field is transferred and stored in the power storage module.

Embodiments describe a wireless charging device including a housing having a charging surface and first and second walls defining an interior cavity, and a transmitter coil arrangement disposed within the interior cavity and configured to generate a time-varying magnetic flux and an electric field during wireless power transfer, where each of the plurality of transmitter coils has a central axis positioned a lateral distance away from the central axes of all other transmitter coils of the plurality of transmitter coils. The wireless charging mat also includes an electromagnetic shield positioned between the transmitter coil arrangement and the first wall, an interconnection structure positioned within the interior cavity between the transmitter coil arrangement and the second wall, and a ferromagnetic shield positioned within the interior cavity between the transmitter coil arrangement and the interconnection structure, the ferromagnetic shield is configured to redirect the magnetic flux away from the interconnection structure.

Embodiments describe a wireless charging device including: a housing having an outer perimeter and a charging surface within the outer perimeter, the housing including a first wall and a second wall that define an interior cavity; and a transmitter coil arrangement disposed within the interior cavity and below the planar charging surface. The transmitter coil arrangement includes: a plurality of transmitter coils arranged in different layers, each transmitter coil having a first termination end, a second termination end, and a coil of wire that winds from an inner diameter to an outer diameter between the first and second termination ends; where the first termination end of each transmitter coil is disposed within the inner diameter of its respective coil of wire and the second termination end of each transmitter coil is disposed outside the outer diameter of its respective coil of wire

Embodiments describe a wireless charging device including: a housing having a charging surface and first and second walls that define an interior cavity; a transmitter coil arrangement disposed within the interior cavity, an interconnection structure positioned within the interior cavity below the transmitter coil arrangement, the interconnection structure including a plurality of packaged electrical components mounted on the interconnection structure and configured to operate the plurality of transmitter coils during wireless power transfer, where the plurality of packaged electrical components is located below the transmitter coil arrangement; and a frame comprising a plurality of openings positioned corresponding to the plurality of packaged electrical components, each opening providing space within which a respective packaged electrical device is disposed.

Embodiments describe a wireless charging device including: a housing having a planar charging surface and one or more walls that define an interior cavity; a transmitter coil arrangement positioned within the interior cavity; and a faraday cage enclosing the transmitter coil arrangement. The faraday cage includes: an electromagnetic shield positioned between the transmitter coil arrangement and the first shell; an interconnection structure positioned within the interior cavity below the transmitter coil arrangement, the interconnection structure including a plurality of packaged electrical components mounted on the interconnection structure; a ferromagnetic shield positioned between the transmitter coil arrangement and the interconnection structure; and a conductive grounding fence disposed around a perimeter of the interconnection structure and between the electromagnetic shield and the interconnection structure.

Embodiments describe a wireless charging device including: a housing having a charging surface, the housing including first and second walls defining an interior cavity; a transmitter coil arrangement disposed within the interior cavity; a plurality of cowlings for confining the plurality of planar transmitter coils in their respective positions; an interconnection structure positioned within the interior cavity between the transmitter coil arrangement and the second wall, the interconnection structure including a plurality of packaged electrical components mounted onto the interconnection structure; and a plurality of standoffs coupled to the interconnection structure and configured to electrically couple the transmitter coil arrangement to the plurality of packaged electrical components.