The primary coil assembly, which includes a primary coil interposed between a pair of secondary coils and configured to perform electromagnetic mutual induction, and includes: a bonding coil having both ends connected to primary-side terminal pins of the transformer; a first PCB member provided on an upper surface of the bonding coil and configured to constitute an upper-side auxiliary winding of the primary coil; and a second PCB member provided on a lower surface of the bonding coil and configured to constitute a lower-side auxiliary winding of the primary coil.

Three-phase interleaved LLC and CLLC resonant converters, with integrated magnetics, are described. In various examples, the primary sides of the phases in the converters rely upon a half-bridge configuration and include resonant networks coupled to each other in delta-connected or common Y-node configurations. The secondary sides of the phases can rely upon a full-bridge configurations and are coupled in parallel. In one example, the transformers of the phases in the converters are integrated into one magnetic core. By changing the interleaving structure between the primary and secondary windings in the transformers, resonant inductors of the phases can also be integrated into the same magnetic core. A multi-layer PCB can be used as the windings for the integrated magnetics.

Techniques for a magnetic-shielding-and-enhancement winding are disclosed. The magnetic-shielding-and-enhancement winding is a winding of a multi-turn coil that is on a separate layer from other windings of the coil (e.g., on a general winding layer). The magnetic-shielding-and-enhancement winding provides magnetic shielding to reduce localized multiplicative effects of aggregate fields generated by the windings of the coil on the general winding layer and simultaneously acts as one or more turns of the winding structure to enhance the field in a desirable manner.

A packaged electronic device includes first conductive leads and second conductive leads at least partially exposed to an exterior of a package structure, and a multilevel lamination structure in the package structure. The multilevel lamination structure includes a first patterned conductive feature having multiple turns in a first level to form a first winding coupled to at least one of the first conductive leads in a first circuit, a second patterned conductive feature having multiple turns in a different level to form a second winding coupled to at least one of the second conductive leads in a second circuit isolated from the first circuit, and a conductive shield trace having multiple turns in a second level spaced apart from and between the first patterned conductive feature and the second patterned conductive feature, the conductive shield trace coupled in the first circuit.

A device for reducing high-frequency interferences between first and second windings of a transformer that includes a first winding (W.sub.1) and a second winding (W.sub.2), which are wound around a common core, wherein the first winding (W.sub.1) is an interference-emitting winding and a shielding winding (W.sub.S) or a shielding film (W.sub.S) is arranged between the first winding (W.sub.1) and the second winding (W.sub.2), wherein the shielding winding (W.sub.S) and the core are connected to the reference potential (B) of the first winding (W.sub.1).

Disclosed are an inductor layout and an integrated circuit device with improved isolation between inductors through shielding magnetic coupling between the inductors. first and second inductor coils are horizontally spaced apart from each other. A conductor loop is disposed in parallel above the first inductor coil and shields magnetic coupling between the first and second inductor coils in the manner that a part of magnetic flux of a first time-varying magnetic field generated by the second inductor coil is cancelled by magnetic flux of a second magnetic field generated by an induction current that flows in the conductor loop magnetically interlinked with the first time-varying magnetic field. The inductor layout can be applied to an RFIC device to reduce magnetic coupling between inductors of a power amplifier and an oscillator. Improved performance of the device and a very small RFIC can be achieved.

A magnetic field generator includes a plurality of conductive windings comprising a first conductive winding arranged in a first plane and a second conductive winding arranged in a second plane that is substantially parallel to the first plane. The plurality of conductive windings are configured to generate, when supplied with a drive current, a first component of a compensation magnetic field. The first component of the compensation magnetic field is configured to actively shield a magnetic field sensing region located between the first conductive winding and the second conductive winding from ambient background magnetic fields along a first axis that is substantially orthogonal to the first plane and the second plane.

Exemplary embodiments of the present disclosure are directed to resonant transformers (or reactors) and coil arrangements associated with resonant transformers. The coil arrangements can include a grounding coil configured to generate a net-zero induced voltage between a first end of the grounding coil and a second end of the grounding coil layer, and one or more step-up coil layers formed by one or more layers of pressure tape, insulating materials, and wire wrapped to form coils about a portions of a split magnetic core. The split magnetic core can include a first core segment and a second core segment, where one of the core segments is disposed within a main housing and one of the core segments is disposed external to the main housing. A gap between the first and second core segments can be manipulated to control an inductance of the resonant transformer.

A transformer and a switch-mode power supply are provided. The transformer includes: a magnetic core structure; several windings that surround a same magnetic cylinder in the magnetic core structure in a stacked manner, where the several windings include at least one primary-side winding and at least one secondary-side winding; and an electromagnetic shielding layer that is disposed between at least two adjacent windings, where the two adjacent windings are a primary-side winding and a secondary-side winding, and the electromagnetic shielding layer is made of a magnetic material. The electromagnetic shielding layer of the transformer can suppress a noise current of the winding, to reduce noise.

An antenna for transmitting power in a wireless power transfer system comprises a first arm and a second arm. The first arm has a proximal end and a distal end extending helically about a first central axis. The second arm has a proximal end and a distal end extending helically about a second central axis toward the distal end of the first arm. A radius between the second arm and the second central axis increases in a distal direction away from the proximal end.