Abstract: A wireless power transmission system includes a transmitter antenna, a transmission controller, an amplifier, and a variable resistor. The transmission controller is configured to (i) provide a driving signal for driving the transmitter antenna based on an operating frequency for the wireless power transfer system and (ii) perform one or more of encoding the wireless data signals, decoding the wireless data signals, receiving the wireless data signals, or transmitting the wireless data signals. The variable resistor is in electrical connection with the transmitter antenna and configured to alter a quality factor (Q) of the transmitter antenna, wherein alterations in the Q by the variable resistor change an operating mode of the wireless power transmission system.

Abstract: A foreign matter detection device includes: a plurality of detection coils (43-1 to 43-n) between a transmission coil (12) of a power transmission device (2) and a reception coil (21) of a power reception device (3), through which power is transmitted in a contactless manner; a plurality of capacitors (44-1 to 44-n) forming, for each of the detection coils, a resonance circuit together with the detection coil; a power supply circuit (41) supplying AC power having a predetermined frequency to each detection coil; and a detection circuit (45) detecting a voltage output from each detection coil and detecting a foreign matter entering between the transmission coil (12) and the reception coil (21) according to the voltage detected. Then, each detection coil is arranged to overlap by a predetermined amount that allows electromagnetic coupling between adjacent two of the detection coils (43-1 to 43-n) to be ignored.

Abstract: A method for operating a wireless power transmission system includes providing a driving signal for driving a transmission antenna of the wireless power transmission system, the driving signal based, at least, on an operating frequency for the wireless power transmission system. The method further includes inverting, by the at least one transistor, a direct current (DC) input power signal to generate an AC wireless signal at the operating frequency, based on provided driving signals. The method includes receiving, at a damping circuit, damping signals configured for switching the damping transistor to one of an active mode and an inactive mode to control signal damping, wherein the damping signals switch to the active mode periodically. The method further includes selectively damping, by the damping circuit, the AC wireless signals, during transmission of the wireless data signals if the damping signals set the damping circuit to the active mode.

Abstract: A capacitive coupler with asymmetric insulating layers includes a coupler transmitting side and a coupler receiving side. The coupler transmitting side includes a first insulating cavity, and a first plate and a second plate that are arranged on a first plane. The first insulating cavity is configured to enclose the first plate and the second plate with an insulating material. The coupler receiving side is arranged opposite to the coupler transmitting side and includes a second insulating cavity, a third plate and a fourth plate that are arranged on a second plane. The second insulating cavity is configured to enclose the third plate and the fourth plate with an insulating material. The first insulating cavity and the second insulating cavity have asymmetric insulating layers. The capacitive coupler can improve the power transfer efficiency and reduce the safety distance of the electric field.

Abstract: A power reception method for a wireless power receiver, the power reception method including storing information on a reference quality factor and a reference peak frequency; generating a foreign object detection (FOD) status packet including the information on the reference quality factor and the reference peak frequency and a packet having a length of eight bits; transmitting the FOD status packet to a wireless power transmitter; receiving a foreign object detection indicator indicating whether a foreign object is present in a charging area of the wireless power transmitter in response to the FOD status packet; performing differential bi-phase encoding for binary data of the packet having a length of eight bits; performing byte encoding for binary data of the differential bi-phase encoded packet; and transmitting the byte encoded packet to the wireless power transmitter, wherein the byte encoding is inserting a start bit, a stop bit, and a parity bit into binary bit stream of the differential bi-phase encod

Abstract: A system for dynamically adjusting coupling coefficients of a non-contact transmission magnetic mechanism, wherein a power supply end is connected to a non-contact transmission electric energy conversion module and a magnetic field regulation electric conversion module respectively by means of an input power consumption measurement unit, the non-contact transmission electric energy conversion module is connected to a transmitting coil by means of a tuning wave-blocking circuit, a receiving coil is provided corresponding to the transmitting coil, the receiving coil is provided on the wave-blocking circuit, the wave-blocking circuit is connected to a load end by means of a rectifying and voltage stabilizing circuit and an output power consumption measurement module, signal loading and extraction modules having a controller and a signal modulation and demodulation module are connected in parallel to two ends of the transmitting coil and the receiving coil.

Abstract: A power receiving device receives power from a power transmitting device including a primary coil in a contactless manner and supplies power to a power storage device. The power receiving device includes a secondary coil that receives AC power of a predetermined frequency from the primary coil, a capacitor that is connected to the secondary coil and constitutes a resonant circuit together with the secondary coil, a rectifier circuit that rectifies output power from the resonant circuit, a power conditioning circuit that is provided between the power storage device and the rectifier circuit and includes a switch, and a control device that controls the switch by a predetermined driving frequency. The driving frequency is a frequency obtained by dividing the predetermined frequency of the AC power by a natural number equal to or greater than 2.

Abstract: An apparatus for wireless power reception includes a receiver coil and a rectifier having a first input and a second input, the first input coupled to a first terminal of a receiver coil, the second input coupled to a second terminal of the receiver coil through a resonant capacitor. The apparatus further includes a first capacitor and a first switch network connected in series between the first input and ground and a second capacitor and a second switch network connected in series between the second input and ground, each of the first switch network and the second switch network including at least a plurality of field-effect transistors (FETs) connected in parallel, wherein the first switch network and the second switch network configured to adjust an impedance coupled to the receiver coil, the impedance associated with an Amplitude Shift Keying (ASK) modulation used by the apparatus.

Abstract: A wireless power transmission system includes a transmitter antenna, transmission controller, and an amplifier. The transmitter controller is configured to provide a driving signal for driving the transmitter antenna based on, at least, an operating mode for transmission of AC wireless signals and determine the operating mode for transmission of the AC wireless signals, wherein the operating mode includes a power level for the wireless power signals and a data rate for the wireless data signals, the power level chosen from a series of available power levels and the data rate chosen from a series of available data rates, each of the series of available power levels corresponding to one of the series of available data rates, wherein corresponding pairs of available power levels and available data rates are inversely related.

Abstract: A wireless power receiver that receives power from a wireless power transmitter, the wireless power receiver including a communication unit configured to communicate with the wireless power transmitter; a memory configured to store information on a reference quality factor and a reference peak frequency; and a controller, wherein the controller generates a foreign object detection (FOD) status packet including information on the reference quality factor or the reference peak frequency, wherein the communication unit transmits the FOD status packet to the wireless power transmitter, wherein the communication unit receives, from the wireless power transmitter, a foreign object detection indicator indicating whether a foreign object is present in a charging area of the wireless power transmitter in response to the FOD status packet, wherein the FOD status packet has a length of two bytes, wherein one byte of the FOD status packet includes a 6-bit reservation field and a 2-bit mode field, and wherein all bits of

Abstract: An inspection device includes: an inspection coil disposed between a first feeder line and a second feeder line; and a cover formed to cover a core. The cover includes: a coil cover portion covering the inspection coil; and a projection portion formed to project to both sides at least in a specific radial direction with respect to the coil cover portion. The dimension in the specific radial direction of the coil cover portion is smaller than the design interval between the first feeder line and the second feeder line, and the dimension in the specific radial direction of the projection portion is larger than the design interval.

Abstract: A wireless charging device and an operation method thereof are provided. The wireless charging device includes a charging module, at least one proximity sensor and a central controller. The wireless charging device senses a distance variation between the wireless charging device and an object using the proximity sensor and accordingly determines whether to turn on or turn off the charging module to achieve energy saving.

Abstract: A control circuit controls a power supply circuit to generate transmitting power having a frequency varying within a frequency range. The control circuit determines a stably transmitting frequency based on a detected output voltage of a power receiver apparatus, the stably transmitting frequency indicating a frequency of the transmitting power at which dependency of the output voltage on a load value of the power receiver apparatus is at least locally minimized within the frequency range. The control circuit determines a transmitting voltage based on the detected output voltage, the transmitting voltage indicating a voltage of the transmitting power at which the output voltage reaches a target voltage when generating transmitting power having the stably transmitting frequency. The control circuit controls the power supply circuit to generate transmitting power having the stably transmitting frequency and the transmitting voltage.

Abstract: A wireless power transmission system includes a voltage regulator, an inverter, a capacitor circuit, an antenna, and a controller. The inverter receives a first alternating current (AC) signal that has a configurable frequency and produces a configurable supply voltage. The inverter produces a second AC signal based on the first AC signal and the configurable supply voltage. The second AC signal has the configurable frequency and a configurable power level that corresponds to the configurable supply voltage. The capacitor circuit includes two or more capacitors and is configured to, based on a configuration state of the bank of two or more capacitors, tune the second AC signal with the bank of two or more capacitors and thereby produce a third AC signal. The controller is configured to define the configurable frequency, define the level of the configurable supply voltage, and define the configuration state.

Abstract: Disclosed is an apparatus for inspecting the appearance of a can for a secondary battery, which can obtain an image of the appearance of the can for the secondary battery and determine whether there is a defect. The apparatus for inspecting the appearance of a can for a secondary battery according to the disclosure obtains lateral images of a plurality of cans at once, and generates the lateral image for one can by extracting an area where each can is captured, thereby speeding up the inspection. Further, the lateral images of the can are obtained with light emitted in various combinations, thereby having an effect on improving the accuracy in defect diagnosis.

Abstract: A wireless power transfer device can include a coil that couples to a corresponding coil of a counterpart device to facilitate wireless power transfer, a power converter coupled to the coil, and controller and communication circuitry that monitors one or more observable parameters associated with the wireless power transfer to detect a presence of a foreign object that is not the counterpart device and controls the power converter responsive to detection of the foreign object. The controller and communication circuitry can perform foreign object detection based on power accounting that includes estimating friendly metal losses associated with the counterpart device. The controller and communication circuitry can interrogate a machine readable tag associated with a case of the counterpart device and can receive from the machine readable tag information about the presence or properties of the case. The machine readable tag can be an NFC tag.

Abstract: A wireless power transmitter that transmits power to a wireless power receiver, the wireless power transmitter including a wireless communication unit configured to communicate with the wireless power receiver; and a controller, wherein the wireless communication unit receives a foreign object detection (FOD) status packet from the wireless power receiver, wherein the controller determines whether a foreign object is present in a charging area of the wireless power transmitter on the basis of the FOD status packet, wherein the wireless communication unit transmits, to the wireless power receiver, a foreign object detection indicator indicating whether the foreign object is present in the charging area of the wireless power transmitter on the basis of a result of the determination, wherein the FOD status packet includes information on a reference quality factor or a reference peak frequency, wherein the FOD status packet has a length of two bytes, wherein one byte of the FOD status packet includes a 6-bit rese

Abstract: A power transmission method for a wireless power transmitter, the power transmission method including receiving, from a wireless power receiver, a foreign object detection (FOD) status packet including information on a reference quality factor or a reference peak frequency; determining whether a foreign object is present in a charging area of the wireless power transmitter based on the FOD status packet; and generating a foreign object detection indicator indicating whether the foreign object is present in the charging area of the wireless power transmitter based on a result of the determination and transmitting the generated foreign object detection indicator to the wireless power receiver, wherein the FOD status packet has a length of two bytes, wherein one byte of the FOD status packet includes a six-bit reservation field and a two-bit mode field, and wherein all bits of the reservation field are recorded as zero.

Abstract: Wireless power transfer systems, disclosed, include a wireless power transmission system and a wireless power receiver system. The wireless power transmission system includes a transmitter antenna configured to couple with a receiver antenna to transmit alternating current (AC) wireless signals to the receiver antenna. Antenna coupling may be inductive and may operate in conformance to a wireless power and data transfer protocol. A transmission controller drives the transmitter antenna at an operating frequency, and either the wireless power transmission system or the wireless power receiver system may damp the wireless power transmission to create a data signal containing a serial asynchronous data signal.

Abstract: A power reception method for a wireless power receiver, the power reception method including storing information on a reference quality factor and a reference peak frequency; generating a foreign object detection (FOD) status packet including the information on the reference quality factor and the reference peak frequency; transmitting the FOD status packet to a wireless power transmitter; and receiving a foreign object detection indicator indicating whether a foreign object is present in a charging area of the wireless power transmitter in response to the FOD status packet, wherein the FOD status packet has a length of two bytes, wherein one byte of the FOD status packet includes a 6-bit reservation field and a 2-bit mode field, and wherein all bits of the reservation field are recorded as zero.

Abstract: A wireless power transmitter can include a coil, an inverter coupled to the coil, and control circuitry coupled to the inverter that, responsive to receiving a burst request pulse from a wireless power receiver, initiates inverter operation, driving the coil and powering the receiver. The control circuitry can operate inverter switches so bandwidth of the wireless power transfer signal falls within a specified range by: (a) extending a minimum on time of the switches, (b) modifying pulse width modulation (PWM) drive signals supplied to the switches to shape a coil current burst envelope, and/or (c) modifying PWM signal amplitude supplied to the switches. Modifying the PWM drive signals can include using a symmetrical PWM scheme in which the positive and negative pulses are symmetrical in width on a cycle-by-cycle basis or using a complementary PWM scheme in which the positive and negative pulse widths are complementary on a cycle-by-cycle basis.

Abstract: A wireless power receiver that receives power from a wireless power transmitter, the wireless power receiver including a communication unit configured to communicate with the wireless power transmitter; and a controller, wherein the controller generates a foreign object detection (FOD) status packet including information on a reference quality factor or a reference peak frequency, and a packet having a length of eight bit, wherein the communication unit transmits the FOD status packet to the wireless power transmitter, wherein the communication unit receives, from the wireless power transmitter, a foreign object detection indicator indicating whether a foreign object is present in a charging area of the wireless power transmitter in response to the FOD status packet, wherein the controller performs differential bi-phase encoding for binary data of the packet having a length of eight bits, wherein the controller performs byte encoding for binary data of the differential bi-phase encoded packet, wherein the com

Abstract: A power transmission apparatus comprises: transmission unit configured to perform wireless power transmission to a power reception apparatus; first communication unit configured to perform communication via a first communication method; and second communication unit configured to perform communication via a second communication method, wherein, in a case where the transmission unit stops wireless power transmission to the power reception apparatus in a state in which the second communication unit and the power reception apparatus are connected based on information transmitted and received between the first communication unit and the power reception apparatus, the second communication unit performs communication to connect the second communication unit and the power reception apparatus.

Abstract: A wireless power transmitter including a reception unit configured to receive a foreign object detection (FOD) status packet from a wireless power receiver; and a transmission unit configured to transmit a response indicating whether a foreign object is present in a charging area of the wireless power transmitter to the wireless power receiver, wherein the FOD status packet includes a mode bit field, wherein the mode bit field indicates whether the FOD status packet includes a reference peak frequency of the wireless power receiver, wherein the reference peak frequency is pre-allocated to the wireless power receiver, and wherein the response is determined using a measured peak frequency of a transmitted power signal and an adaptive threshold frequency based on the reference peak frequency included in the FOD status packet.

Abstract: An apparatus for transmitting power wirelessly using capacitive coupling, provided in a wearable device, includes: a transmission electrode including a plurality of unit electrode pairs, each unit electrode pair being formed by a transmission signal electrode and a transmission ground electrode; and a control module configured to select a unit electrode pair, forming capacitive coupling with the reception electrode, among the plurality of unit electrode pairs provided in the reception electrode, to wirelessly transmit power to a reception electrode included in an implantable device.

Abstract: A footwear system includes a sensorized insole and a charger. The sensorized insole has an insole bulk having a foot-facing upper surface. A sensor is embedded in the insole bulk for measuring a parameter of a user's foot, a battery is embedded in the insole bulk for providing energy to the sensor, and a receiver pod is embedded in the insole bulk and is spaced from the foot-facing upper surface for wirelessly receiving energy and providing energy to the battery. The charger provides energy to the receiver pod, and includes a cable for connecting to an energy source, and a transmitter pod electrically connected to the cable for receiving energy from the cable and wirelessly transmitting energy to the receiver pod. The transmitter pod is positionable against the foot-facing upper surface to wirelessly provide energy to the receiver pod through the insole bulk.

Abstract: Systems, methods, and non-transitory media are provided for cross-coupling modeling and compensation.

Abstract: A rechargeable wearable electronic device includes a wireless power receiver system, a device portion, and a band portion. The wireless power receiver system includes a receiver antenna, a power conditioning system, and a controller. The device portion includes a device housing containing an electronic circuitry module, which includes the wireless power receiver system and a rechargeable power source, wherein the circuitry module generates heat during wireless charging of the rechargeable power source. The band portion is for attaching the wearable electronic device to a user appendage, the band portion having a heat spreading layer of a thermally conductive material, the heat spreading layer having an inner portion within the device housing in thermal contact with the electronic circuitry module, to absorb heat from the electronic circuitry module and spread the absorbed heat to the remainder of the heat spreading layer.

Abstract: Systems, methods and apparatus for wireless charging are disclosed. A charging device has multiple transmitting coils, a driver circuit configured to provide a charging current to the resonant circuit, and a controller. The charging cells may provide a charging surface. The driver circuit may be configured to provide a charging current to the transmitting coils. The charging device includes a radio interface configured for transmitting and receiving radio frequency identification (RFID) signals. The controller may be configured to transmit an interrogation signal configured to stimulate RFID tags through the radio interface when a chargeable device is initially placed on or near a surface of the wireless charger, refrain from initiating wireless charging of a chargeable device when a response to the interrogation signal is received, and negotiate a charging configuration when a response to the interrogation signal is not received.

Abstract: An under-cabinet wireless power system is mountable to an underside of a wall cabinet that is positioned over a countertop and includes a wireless power transmitter capable of powering a wirelessly powered appliance positioned proximate thereto.

Abstract: The present specification relates to a wireless power transmission device. The present specification provides a wireless power transmission device comprising: a power supply unit for supplying power to the wireless power transmission device; at least one first coil for transmitting power to a wireless power reception device; and first and second condensers configured so as to be connected respectively to different both ends of the power supply unit and the first coil.

Abstract: A wireless power transmitter (101) or power receiver (105) comprises a power transfer coil (103, 107) for receiving or generating a power transfer signal and a controller (201, 301) for controlling the device to perform power transfer during a power transfer phase. The power transfer phase comprises power transfer intervals where power is transferred and foreign object detection time intervals during which a power level of the power transfer signal is reduced. A magnetic shielding element (503, 505) is positioned between the power transfer coil (103, 107) and a power transfer coil of a complementary device. The magnetic shielding element (503, 505) comprises a magnetic shield material having a saturation point such that it operates in a saturated and non-saturated mode during respectively power transfer intervals and foreign object detection time intervals.

Abstract: An example system includes a wireless-power transmitter configured to emit a first set of one or more radio frequency (RB signals and a security camera coupled to a wireless-power receiver. The wireless-power receiver is configured to receive the first set of one or more RF signals. The security camera includes at least one component for converting energy from the first set of one or more RF signals into usable power to power the security camera. The usable power is a primary source of power for the security camera. The example system can also include a processor in communication with the wireless-power transmitter configured to, in accordance with a determination that the security camera has moved relative to the wireless-power transmitter, adjust the wireless-power transmitter to emit a second set of one or more RF signals from the wireless-power transmitter to continue providing usable power to the security camera.

Abstract: A power receiving apparatus 101 transmits information representing three or more received powers used in calculating a parameter used in a detection processing by a transmitting apparatus 102. At that time, a relationship P1<P2<P3 is satisfied, where P1 is a first received power which information transmitted an n-th time represents (n is an integer of one or greater), P2 is a second received power which information transmitted an n+1-th time represents, and P3 is a third received power which information transmitted an n+2-th time represents.

Abstract: A foreign object detection device for a wireless power transfer system for inductive power transfer from a primary part to a secondary part across an airgap, includes a sensor module with a multitude of detection cells. In order detect a foreign object near a detection cell, a stimulation signal is applied to a detection cell by means of a stimulation unit and the time response of the detection cell is measured with a measurement unit and compared to a reference time response of that detection cell that has been previously sensed by a control and signal processing unit.

Abstract: A thin resonant induction wireless power transmission transfer coil assembly designed for low loss and ease of manufacturing includes one or more printed circuit boards having a first conductor pattern wound in a spiral on a first side and a second conductor pattern wound in a spiral on a second side thereof, where the second conductor pattern is aligned with the first conductor pattern whereby the second conductor pattern reinforces magnetic flux generated by the first conductor pattern. The first and second conductor patterns are placed relative to one another so as to provide flux transmission in a same direction. One or more of such printed circuit boards form a wireless power transmission coil assembly with a conductive winding layer, a ferrite flux diversion layer, conformal spacing layers, an eddy current shield layer and an assembly enclosure.

Abstract: Methods and systems for charging an electric vehicle (EV) are described herein. An EV may require additional battery power to reach a charging station. A remote server in communication with the EV or an on-board computer or mobile device in the EV may obtain data to determine a location for the EV to meet a charging vehicle. The charging vehicle may be dispatched to meet the EV and deliver power to it, enabling the EV to reach a charging station or other destination. In some examples, the charging vehicle may deliver power to the EV while both vehicles are stationary. In other examples, the charging vehicle may couple to the EV while both vehicles are in motion.

Abstract: A wireless power transmission method including receiving, from a wireless power receiver, a first foreign object status packet and a second foreign object status packet; and transmitting, to the wireless power receiver, a foreign object detection indicator indicating whether a foreign object is present in a charging area of a wireless power transmitter, wherein the first foreign object status packet includes a first reference value and mode information, wherein the second foreign object status packet includes a second reference value and mode information, wherein the mode information of the first foreign object status packet indicates whether the first reference value is a reference quality factor or a reference peak frequency of the wireless power receiver, and wherein the mode information of the second foreign object status packet indicates whether the second reference value is the reference quality factor or the reference peak frequency of the wireless power receiver.

Abstract: A wireless power receiver comprises: a power pickup circuit for receiving wireless power from a wireless power transmitter on the basis of a magnetic coupling with the wireless power transmitter, and converting an alternating current signal generated by the wireless power into a direct current signal; and a communication/control circuit for communicating with the wireless power transmitter and controlling the wireless power that is received, wherein the communication/control circuit transmits, to the wireless power transmitter, an end power transfer packet for detecting a foreign object in a primary power transfer step of receiving the wireless power so as to enable the wireless power transmitter to detect the foreign object, receives a ping signal from the wireless power transmitter which has estimated that no foreign object is present, and transmits a data packet, in response to the ping signal, for entering a secondary power transfer step.

Abstract: A wireless charger includes a base, a first transmitter, a driver circuit, a controller and an energy radiation member. The first transmitter coil is fixed in the base. The driver circuit is disposed in the base. The controller is disposed in the base and connected to the driver circuit. The energy radiation member is detachable from the base and connected to the base through a wire, and the energy radiation member comprises a second transmitter coil. In the case that the energy radiation member and the base are in a separated state, the driver circuit drives, under control of a control signal from the controller, the first transmitter coil and the second transmitter coil to operate.

Abstract: A wireless power transmission device can include a plurality of transmission coil units, in which each of the plurality of transmission coil units includes a plurality of antenna coils arranged on different three-dimensional planes, and the plurality of antenna coils are configured to generate a magnetic field passing through at least one or more of the different three-dimensional planes to transfer transmission power to a wireless power reception device.

Abstract: A method for transmitting wireless power according to one embodiment of the present specification involves: receiving information about received power values for two or more correction points for power correction from a device for receiving wireless power; constructing a power correction curve, for detecting foreign substances, on the basis of the information about the received power values; and transmitting a data packet requesting initiation of a power correction protocol for updating the power correction curve.

Abstract: A coil structure for wireless power transmission is provided. The coil structure comprises: a primary resonance coil wound in a spiral shape around a centripetal point; a primary induction coil, which supplies power to the primary resonance coil in a nonconnected state with an input or output terminal of the primary resonance coil and is wound in a spiral shape on a substantially same plane around a substantially same centripetal point as the centripetal point; a switch configured to be parallel with the primary resonance coil so as to control the ON and OFF of an operation of the primary resonance coil; and a capacitor coupled to the primary resonance coil so as to form a magnetic resonance with the primary resonance coil.

Abstract: A wireless power transmitter that transmits power to a wireless power receiver, the wireless power transmitter including a wireless communication unit configured to communicate with the wireless power receiver; and a controller, wherein the wireless communication unit receives, from the wireless power receiver, a first foreign object status packet and a second foreign object status packet and transmits, to the wireless power receiver, a foreign object detection indicator indicating whether a foreign object is present in a charging area of the wireless power transmitter, wherein the controller is configured to generate the foreign object detection indicator, wherein the first foreign object status packet includes a first reference value and mode information, wherein the second foreign object status packet includes a second reference value and mode information, wherein the mode information of the first foreign object status packet indicates whether the first reference value is a reference quality factor or a re

Abstract: A near-field charging system for wirelessly charging electronic devices using electromagnetic energy having a low frequency is provided. The near-field charging system comprises: (A) a transmitting antenna comprising: a first substrate; and a first antenna, coupled to the first substrate, that follows a first meandering pattern having a first length, wherein the transmitting antenna has a first port impedance, and (B) a receiving antenna comprising: a second substrate; and a second antenna, coupled to the second substrate, that follows a second meandering pattern having a second length, wherein: (i) the second length is less than the first length, and (ii) the receiving antenna has a second port impedance that is less than the first port impedance. The transmitting antenna is configured to transmit electromagnetic energy having a frequency at or below 60 MHz to the receiving antenna at an efficiency above 90%.

Abstract: In certain examples, methods and semiconductor structures are directed to an apparatus including source circuitry configured to provide power to other circuitry, with the source circuitry including amplification circuitry (e.g., with a power-switching output) and a source resonator. The amplification circuitry is to provide power to the source resonator with a gain that is dependent on a coupling rate between the source circuitry and other external-receiving circuitry. The source circuitry is also to offset phase delay caused by the amplifier. In operation, the source resonator generates a magnetic field in response to the power, for highly-efficient wirelessly transfer of the power to the other circuitry.

Abstract: A wireless power transmission device comprises a plurality of transmission coils having different inductances and a controller. The controller wirelessly transmits a first transmission power to the electronic apparatus through a first transmission coil among the plurality of transmission coils, obtains whether it is an under-coupling mode or an over-coupling mode, when receiving power shortage information from the electronic apparatus, changes from the first transmission coil to a second transmission coil according to the obtained mode, and wirelessly transmits a second transmission power to the electronic apparatus through the changed second transmission coil. The second transmission coil is one of the remaining transmission coils except for the first transmission coil among the plurality of transmission coils.

Abstract: A wireless power transfer system is disclosed. The wireless power transfer system includes a first converting unit configured to convert a first DC voltage of an input power to an AC voltage. Further, the wireless power transfer system includes a contactless power transfer unit configured to transmit the input power having the AC voltage. Also, the wireless power transfer system includes a second converting unit configured to convert the AC voltage to a second DC voltage and transmit the input power having the second DC voltage to an electric load. Additionally, the wireless power transfer system includes a switching unit configured to decouple the electric load from the contactless power transfer unit if the second DC voltage across the electric load is greater than a first threshold value.

Abstract: A wireless power reception circuit system includes a wireless power reception circuit, an electric storage device, a load unit, a digital control circuit, a voltage conversion circuit, a DC-DC converter, smoothing capacitors, a voltage OR circuit, and an external signal setting circuit for resetting the digital control circuit. An enable signal input terminal of the voltage conversion circuit is in a disabled state when the voltage conversion circuit is not controlled by the digital control circuit. The digital control circuit supplies an enable signal to the enable signal input terminal of the voltage conversion circuit when operating the voltage conversion circuit.

Abstract: An electronic device for monitoring. The electronic device includes a functional module arranged to provide an active function, a communication module arranged to communicate with an external communication device, and an energy harvesting module arranged to transform a source energy from an external source to electrical energy for energising both the communication module and the functional module.