Abstract:
A frequency selective surface (FSS) is provided. The FSS includes a dielectric having an arbitrary permittivity and a thickness, a loop gap including a gap and arranged on an upper surface of the dielectric, a patch arranged inside the loop gap, and a cross strip arranged on a lower surface of the dielectric.
Abstract:
An apparatus and method for wirelessly transmitting power and an apparatus and method for wirelessly receiving power are provided. A wireless power reception apparatus may include a reception circuit that is configured to wirelessly receive power having an extended frequency band and that includes a matching inductor with an adjusted inductance and a matching capacitor with an adjusted capacitance, and a processor configured to determine reception parameters related to a resonant frequency of the reception circuit based on transmission parameters and control the inductance and the capacitance based on the reception parameters, and the transmission parameters may be related to a variation in a transmission frequency at which the power is wirelessly transmitted.
Abstract:
A wireless power transmission system and method are disclosed. The wireless power transmission system includes a plurality of wireless power transmitters configured to provide power to a plurality of wireless power receivers, and a controller configured to control the wireless power transmitters based on information of the wireless power receivers. The controller is configured to receive information of a wireless power receiver from the wireless power receiver, calculate a transmission parameter associated with a transmission efficiency of power to be provided to the wireless power receiver using the information of the wireless power receiver, and provide power to the wireless power receiver through the wireless power transmitters based on the transmission parameter.
Abstract:
Provided is a wireless charging apparatus for performing wireless charging of an electronic device including a receiving coil located in a three-dimensional (3D) wireless charging zone using a plurality of transmitting coils arranged in the 3D wireless charging zone and at least one power source configured to supply a current to the plurality of transmitting coils.
Abstract:
Provided is a wireless power reception apparatus for wirelessly receiving power from a wireless power transmission apparatus, the wireless power reception apparatus including a reception coil configured to receive power by a harmonic with an n*f0 frequency that is generated through electromagnetic induction with the wireless power transmission apparatus; a matching circuit configured to transfer the harmonic with the n*f0 frequency to a harmonic generator; the harmonic generator configured to generate at least one harmonic with an m*n*f0 frequency by applying a multiplication factor m to the transferred harmonic with the n*f0 frequency; a filter configured to filter the harmonic with the m*n*f0 frequency; and a harmonic transmission coil configured to transmit the filtered harmonic with the m*n*f0 frequency to the wireless power transmission apparatus, and to attenuate the harmonic with the n*f0 frequency that is generated from the wireless power transmission apparatus.
Abstract:
Provided is a wireless charging apparatus for performing wireless charging of an electronic device including a receiving coil located in a three-dimensional (3D) wireless charging zone using a plurality of transmitting coils arranged in the 3D wireless charging zone and at least one power source configured to supply a current to the plurality of transmitting coils.
Abstract:
An open type resonance coil without dual loops having a serial type in-phase direct power feeding method without dual loops is provided. A transmission device is configured as two resonators and to feed power in phase, the transmission device is configured as a power feeding loop without a resonance coil, two transmission devices are connected in series, and winding directions of coils of half of the two transmission devices connected by a conductive wire are opposite.
Abstract:
A method includes matching a basic mode frequency signal and a higher order mode frequency signal to a multi-band frequency signal with respect to a signal in the form of the square wave, transferring the matched basic mode frequency signal and higher order mode frequency signal simultaneously to a multi-resonance reception resonator, converting output impedance of the basic mode frequency and the higher order mode frequency which are received through the reception resonator into a conjugate value of input impedance of the basic mode frequency and the higher order mode frequency of a receiver, and converting the converted multi-band frequency signal into an electric power that is required in a load and transferring the electric power to the load.
Abstract:
A wireless charging system, a method of removing a foreign object in the wireless charging system, and a computing device performing the method are provided. The wireless charging system includes a transmission coil cover mounted to surround a transmission coil of a transmission device, a reception coil cover mounted to surround a reception coil of a reception device, and a direct current (DC) conducting wire attached to each of the transmission coil cover and the reception coil cover, wherein the wireless charging system may be configured to remove a foreign object attached to the transmission coil cover or the reception coil cover by using a force acting on the DC conducting wire according to a direction of a current flowing in the DC conducting wire and a direction of a magnetic field perpendicular to the direction of the current.
Abstract:
A radio frequency (RF) weak magnetic field detection sensor includes a ferromagnetic core, a pickup coil disposed to surround the ferromagnetic core, a substrate that includes an opening, a core pad connected to the ferromagnetic core and a coil pad connected to the pickup coil, and an insulating tube interposed between the ferromagnetic core and the pickup coil. The insulating tube includes a bobbin around which the pickup coil is wound, and a core hole formed to pass through the bobbin and configured to accommodate the ferromagnetic core.