An electromagnetic connector is disclosed that is configured to form a first magnetic circuit portion comprising a first core member and a first coil disposed of the first core member. The electromagnetic connector is configured to mate with a second electromagnetic connector, where the second electromagnetic connector is configured to form a second magnetic circuit portion comprising a second core member and a second coil disposed of the second core member. The first core member and the second core member are configured to couple the first coil to the second coil with a magnetic circuit formed from the first magnetic circuit portion and the second magnetic circuit portion when the electromagnetic connector is mated with the second electromagnetic connector. The magnetic circuit is configured to induce a signal in the first coil when the second coil is energized.

A method for manufacturing a multilayer coil includes preparing a first substrate by forming a first conductor pattern on a first insulating base material layer, preparing a second substrate by forming a second conductor pattern on a second insulating base material layer, and joining a surface of the first substrate on which the first conductor pattern is formed and a surface of the second substrate on which the second conductor pattern is formed together with only a joining layer made of a thermoplastic resin interposed therebetween. Amounts of deformation of the first and second insulating base material layers are less than that of the joining layer at a fusion temperature. The first and second conductor patterns are each a coil pattern having a coil axis that extends in a lamination direction in which the first substrate and the second substrate are laminated together.

A transmitting element for generating a magnetic field for tracking of an object includes a first spiral trace that extends from a first outer origin inward to a central origin in a first direction. A second spiral trace can extend from the central origin outward to a second outer origin in the first direction. The second spiral trace can extend from the central origin to the second outer origin in the first direction. The first spiral trace and the second spiral trace can be physically connected at the central origin to form the fluorolucent magnetic transmitting element and at least a portion of the first spiral trace overlaps at least a portion of the second spiral trace.

A sensor may include a core and a coil. The core may include a rectangular substrate, a layer of magnetically-permeable material disposed on the substrate, and an adhesive rigidly coupling two ends of the substrate so as to form a tube with the rectangular substrate. The coil may be wound on the tube. The core may further include a layer of radiopaque material. The core may further include a flex pad for electrically coupling the coil with an external system.

Individual coils as well as two or more coils arranged one over the other or one coil in combination with a sensor, which can be integrated into planar semiconductor technology are described. A coil comprises a turn and two supply lines for supplying current to the coil. The turn and the supply lines are formed from a metal layer. One of the two supply lines is connected to a first end of the turn and the other of the two supply lines is connected to a second end of the turn.

In one embodiment, a coil structure for wireless power transfer comprises a ferrite core and at least two coils wound around the ferrite core, the at least two coils located symmetrically about a geometric center of the ferrite core, the at least two coils wound in such a way that when a first current flows in a first spatial direction in one of the at least two coils a second current flows in a second spatial direction in the other one of the at least two coils. In one embodiment, the coil structure is implemented in a wireless power receiver to receive power from a wireless power transmitter or to guide alignment of the receiver to the transmitter. In another embodiment, the coil structure is implemented in a wireless power transmitter to produce a magnetic field for wireless power transfer.

A marker coil includes a flexible substrate, a coil formed on the substrate by wiring, and a substrate holding part that is capable of being attached to a testee. A convex shape is formed in one of the substrate and the substrate holding part, and an engaging part for engaging the convex shape is formed in the other one of the substrate and the substrate holding part.

An electromagnetic connector is disclosed that is configured to form a first magnetic circuit portion comprising a first core member and a first coil disposed of the first core member. The electromagnetic connector is configured to mate with a second electromagnetic connector, where the second electromagnetic connector is configured to form a second magnetic circuit portion comprising a second core member and a second coil disposed of the second core member. The first core member and the second core member are configured to couple the first coil to the second coil with a magnetic circuit formed from the first magnetic circuit portion and the second magnetic circuit portion when the electromagnetic connector is mated with the second electromagnetic connector. The magnetic circuit is configured to induce a signal in the first coil when the second coil is energized.

Provided is a coil substrate having an asymmetric structure, in which the area of a coil pattern included in a first region is expanded relative to the area of a coil pattern included in a second region with respect to a virtual axis, and an electronic apparatus having the same. The coil substrate comprises a base layer; and a coil pattern spirally wound on the base layer, wherein an upper portion of the base layer is divided into a first region and a second region based on a void region formed inside the coil pattern, wherein an area of the coil pattern formed in the second region is larger than an area of the coil pattern formed in the first region.

A flexible inductor includes a first input/output terminal, a second input/output terminal, and a sheet-shaped and coil-shaped conductive pattern that includes a first end, which is connected to the first input/output terminal, and a second end, which is connected to the second input/output terminal, the first input/output terminal, the second input/output terminal, and the coil-shaped conductive pattern being provided on a flexible base member. The flexible inductor is positioned in the vicinity of a metallic part, which is disposed in a housing, or a metallic portion of the housing. The flexible inductor is bent and mounted in the housing in such a manner that one side of the coil-shaped conductive pattern that is close to the metallic part or the metallic portion is the inner side of the bent flexible inductor.