An inductive current transformer for transforming a primary current into a secondary current, the inductive current transformer having: a secondary winding with two terminals; an electronic device adapted to transmit information to an external measuring device; a first inductive coupling device connected to the secondary winding; a power supply device which is coupled to the secondary winding via the first inductive coupling device and which is adapted to generate a supply voltage for the electronic device from the secondary electric current of the secondary winding.

The present invention increases received electrical power received by a power receiving coil by stably increasing a resonance current in the power receiving coil of a wireless power transmission system. The present invention makes use of the wireless power transmission system comprising: a power transmitting coil for generating a magnetic field via an alternating current and a power receiving coil for generating an induced voltage via electromagnetic induction of the power transmitting coil; a power receiving resonant circuit formed by connecting a resonance capacitance to the power receiving coil; a control means for controlling in which the resonance current in the power receiving resonant circuit is matched to a target value; a power receiving coil current control circuit that is controlled by the control means and applies electrical power to the power receiving resonant circuit to increase the resonance current; and a load circuit for receiving power from the power receiving resonant circuit, wherein the power receiving coil current control circuit operates by being supplied with electrical power applied to the power receiving resonant circuit from the load circuit.

A laminate defining a high-frequency laminated component includes a ground electrode on a bottom surface of a lowermost insulating layer. A second insulating layer includes an inner-layer ground electrode arranged over substantially the entire surface thereof. A portion from a third insulating layer to a fifth insulating layer is provided with a capacitor electrode defining a series capacitor of a ground impedance adjustment circuit and capacitor electrodes defining a first parallel capacitor and a second parallel capacitor. A sixth insulating layer has an inner-layer ground electrode provided over substantially the entire surface thereof. The inner-layer ground electrodes are arranged in electrical continuity with the ground electrode by via holes.

Systems and methods are provided for wireless transmission of power or information. A supplying system include a signal source and a transmitter unit. A consuming system includes an electrical load and a receiver unit. Electrical power or information are transmitted wirelessly from the supplying system to the consuming system. The transmitter unit can include a step up transformer. The receiver unit can include a step down transformer. The transmitter unit and receiver unit are not connected to a common ground, resulting in a truly wireless system for transmitting power or information.

A power receiver device including: a pair of receiver electrodes (341, 342) for capacitively coupling with the pair of transmitter electrodes (321, 322) placed on one side of a surface; and a deformable transfer layer (371, 372) placed between each of the pair of the receiver electrodes and another side of the surface. A power signal generated by the power driver (110) is wirelessly transferred from the pair of transmitter electrodes (321, 322) to the pair of receiver electrodes (341, 342) to power a load (150) in the power receiver device.

Methods and apparatus for a signal isolator having inductive and capacitive coupling. In embodiments, magnetic and electric fields are coupled by coils and capacitive plates. In embodiments, a floating plate can enable a top and bottom capacitive plate to be offset from each other.

The present invention relates to a stackable connector for wireless transmission of power between separate devices comprising such a connector of a system, in particular of a patient monitoring system, said separate devices comprising such a connector. The connector comprises a housing (301, 407) and a magnetic coupling unit (302) arranged within the housing (301, 407) for transmitting power to and/or receiving power from another device of the system having a counterpart connector by use of inductive coupling. Said magnetic coupling unit includes a flux concentrator (303, 401, 411, 432, 442), at least part of which having a U-shaped cross-section forming a recess (304, 402, 412, 422, 437, 447) between the legs of the U, a first coil (305, 417, 431) arranged within the recess of the flux concentrator, and a second coil (306, 427, 441) arranged outside of the recess in which the first coil (305, 417, 431) is arranged. The housing (301, 407) is arranged to allow stacking of connectors upon each other so that the first coil (305, 417, 431) of the connector (300, 400, 410, 430) and a second coil of another connector stacked upon the connector together form a transformer for inductive power transmission there between and/or the second coil (306, 427, 441) of the connector (300, 400, 410, 430) and a first coil (305a) of another connector (300a) stacked upon the connector (300, 400, 410, 430) together form a transformer for inductive power transmission there between.

A wireless electric field power transmission system comprises a transmitter comprising a transmit resonator and a transmit capacitive balun, and at least one receiver comprising a receive resonator and a receive capacitive balun. The transmit capacitive balun is configured to transfer power to the transmitter resonator, the transmit resonator is configured to transfer the power to the receive resonator, and the receive resonator is configured to extract the power to the receive capacitive balun via electric field coupling.

An irreversible circuit element includes first and second high pass isolators each including first and second center electrodes intersecting with and being insulated from each other on a ferrite to which a direct-current magnetic field is applied with a permanent magnet. One end of the first center electrode is an output port and the other end thereof is an input port, and one end of the second center electrode is another output port and the other end thereof is a ground port. A pass frequency band of the first isolator is higher than a pass frequency band of the second isolator. Respective output portions of the first and second isolators are electrically connected and defined as one output terminal, and a low pass filter LPF is inserted between the output terminal and the output port of the second isolator.

An electromagnetic induction antenna including: a first inductor including windings; a second inductor including windings spaced apart from the first inductor; and an impedance connecting the first and second inductors; wherein the first and second inductor form a capacitor; wherein the capacitor is an electric field antenna, and wherein the inductor is a magnetic field antenna.