A power transmission unit includes a power transmission coil, a substrate, and a substrate shielding member. The power transmission coil transmits power to a counterpart power transmission coil in a non-contact manner. The substrate is formed in a plate shape, provided such that the substrate faces the power transmission coil, and electrically coupled to the power transmission coil. A current flows between the substrate and the power transmission coil. The substrate shielding member is formed in a plate shape and provided on a side opposite to a side adjacent to the power transmission coil of the substrate. The substrate shielding member shields a magnetic field.

A superconducting current limiting dipole (L6), comprising a superconducting conductor (F6) wound so as to form a two-wire coil extending in a single plane, a layer of insulator (E1 to E11, H1) being arranged between two turns of said coil. The superconducting conductor (C1 to C6) consists of at least four separate superconducting cables (C1 to C6) wound in parallel and arranged in at least two pairs, each of the pairs being formed by two of said superconducting cables (C1 to C6) that are electrically connected to one another in a first connection area, and, in a second connection area, one of the superconducting cables of one pair is electrically connected to one of the superconducting cables of the other pair, the other superconducting cable of each pair being connected to an electrical connection terminal (T1, T2) or to an additional pair.

Micro-scale planar-coil transformers including one or more shields are disclosed. The one or more shields can block most common-mode current from crossing from one side to another side of a transformer. Reduction of common-mode current crossing the transformer results in reduction of dipole radiation, which is the main component of electromagnetic interference (EMI) in some transformers.

A transmitter coil includes a winding part. The winding part is an elliptic-shaped spirally-wound coil with a hollow portion. The outer major axis length of the winding part is in the range between 78 mm and 82 mm. The outer minor axis length of the winding part is in the range between 44 mm and 48 mm. The inner major axis length of the winding part is in the range between 54 mm and 58 mm. The inner minor axis length of the winding part is in the range between 19 mm and 23 mm. The turn number of the winding part is in the range between 8 and 12. A transmitting module with the transmitter coil and a wireless charging device with the transmitter coil are also provided.

A transmitter coil includes a winding part. The winding part is a circular-shaped spirally-wound coil with a hollow portion. The outer diameter of the winding part is in the range between 56 mm and 66 mm. The inner diameter of the winding part is in the range between 30 mm and 40 mm. The turn number of the winding part is in the range between 7 and 13. A transmitting module with the transmitter coil and a wireless charging device with the transmitter coil are also provided.

Various embodiments include an apparatus to filter radio-frequencies in a plasma-based processing device. In various embodiments, an RF filter device includes a number of substantially-planar spiral-filters electrically coupled to and substantially parallel to each other in a spaced-apart arrangement. In one embodiment, each of the planar spiral-filters is coupled to an adjacent one of the planar spiral filters as either an inside-to-inside electrical connection or an outside-to-outside electrical connection based on an arrangement of the successive spirals so as to increase a total value of inductance. Other methods, devices, apparatuses, and systems are disclosed.

Provided are a large area type complex magnetic field shielding sheet and a wireless power transfer module including the same. A large area type complex magnetic field shielding sheet wherein at least one of an overall width, an overall length, and a diameter is 100 mm or more may include a main shielding layer arranged so that a plurality of ferrite block bodies each having a predetermined area are adjacent to each other, and an auxiliary shielding layer formed of at least one magnetic sheet having a predetermined area and laminated on the main shielding layer through an adhesive layer, wherein a boundary region between two ferrite block bodies disposed to be adjacent each other is disposed to be located in an inner region of the magnetic sheet and thus a magnetic field which leaks into a gap between the two ferrite block bodies is blocked by the magnetic sheet.

A non-contact power reception apparatus is provided, in which a power reception coil for a charging system and a loop antenna for an electronic settlement system are mounted on a battery pack and a cover case of a portable terminal such that the power reception coil is arranged in the center thereof and the loop antenna is disposed outside the power reception coil, so that a mode of receiving a wireless power signal and a mode of transmitting and receiving data are selectively performed, thereby preventing interference from harmonic components and enabling non-contact charging and electronic settlement using a single portable terminal. A jig for fabricating a core to be mounted to the non-contact power reception apparatus is provided.

A coil component may include a body having a support member including a through hole, a coil disposed on at least one of an upper surface and a lower surface of the support member, and a magnetic material encapsulating the coil and the support member, and filling the through hole. The coil includes a coil pattern. The coil component further includes an external electrode connected to the coil. At least one of the upper surface and the lower surface of the support member includes a groove, having a shape corresponding to a shape of the coil pattern, and at least a portion of the coil pattern is embedded in the groove.

Disclosed herein is a coil unit that includes a coil, a magnetic member having a first surface facing to the coil and a second surface opposite to the first surface, a first metal shield covering the second surface of the magnetic member, and a second metal shield disposed so as to surround the coil. The first metal shield is disposed spaced apart in the axial direction of the coil from the second surface in a region between an end portion of the magnetic member and the second metal shield. A length Lp of a protruding part of the second shield that protrudes forward from a reference plane that is coplanar with the first surface in the axial direction of the coil is smaller than a first distance Ly from the end portion of the magnetic member to the second metal shield.