Abstract: Provided is a battery charging method using wireless power transmission, the method including: receiving a first message associated with a battery charge start from a reception apparatus; discovering an optimal frequency band for a transmit power signal to be transmitted to the reception apparatus based on the first message; receiving, from the reception apparatus, a second message that includes an extra power value and a charge power value, and is associated with a charge state of the reception apparatus; and adaptively controlling transmit power so that the extra power value is maintained to be constant in proportion to a relationship between the charge power value and a first parameter, based on the second message.

Abstract: A wireless power transmission apparatus includes: a transmission resonator installed in one side wall within a specific space and configured to comprise a transmission feeding loop for transmitting impedance matching and power and receive and transmit the impedance matching and power using the transmission feeding loop. Further, the wireless power transmission apparatus includes a relay resonator installed in another side wall within the specific space and configured to have a resonant frequency identical with that of the transmission resonator and store energy in the specific space by generating mutual resonance through a resonance characteristic with the transmission resonator; and one or more reception resonators installed within the specific space and configured to have a resonant frequency identical with that of the transmission resonator and receive the energy stored in the specific space.

Abstract: Provided is an energy charging apparatus including a transponder configured to transmit and receive radio energy, and a resonator configured to transmit the radio energy transmitted from the transponder to at least one external device and transmit the radio energy received from the at least one external device to the transponder, wherein each of the transponder and the resonator is provided in a form of a single module.

Abstract: Disclosed is an apparatus for harvesting leakage energy. The apparatus for harvesting leakage energy includes: an energy harvesting unit configured to harvest energy leaked while energy radiated from a transmitting unit of an energy transmitting apparatus is transmitted to a receiving unit of an energy receiving apparatus; and a harvesting circuit module configured to supply energy harvested by the energy harvesting unit to a load. In accordance with the embodiment of the present invention, energy efficiency of overall system can be increased by harvesting the leakage energy without affecting performance of a wireless power transmission system.

Abstract: A resonator structure for a wireless power transfer system Includes resonators, which are to transfer wireless power, and a dielectric substance, which includes at least one exposure region formed on the dielectric substance to fix the resonators in a covered shape and to selectively expose parts of the resonators.

Abstract: Provided are wireless power transmitting method and apparatus using dual-loop in-phase feeding. The wireless power transmitting apparatus includes a generator configured to generate a Radio Frequency (RF) signal, an amplifier configured to amplify the generated RF signal, a matching circuit configured to be connected to the amplifier to perform impedance matching, a first resonator configured to comprise a first feeding loop connected to the matching circuit and transmit wireless power using a signal provided through the first feeding loop, and a second resonator configured to comprise a second feeding loop connected to the matching circuit and transmit wireless power using a signal provided through the second feeding loop, wherein the first and second feeding loops are formed in a manner that allows magnetic fields respectively generated by the first and second resonators to be excited in the same direction and in phase.

Abstract: Disclosed is an energy transmitting apparatus in an energy system, including: a transmit feeding cable configured to be applied with AC power; a transmit inductor in which AC current for an AP power supply flows; a transmit metal electrode configured to transmit the AC power to a receive metal electrode by the AC current flowing the transmit inductor; and a transmit grounding bar configured to control at least one of a position, a length, and a diameter thereof to control a resonance frequency generated by the transmit inductor.

Abstract: A direct feeding apparatus for impedance matching of a wireless power transmission device includes a helical type resonator, and a feeding unit configured to directly feed power to a region having a relatively small current value as compared to a center of a conductive line of the resonator.

Abstract: Provided is a wireless power transmission method and apparatus for improving spectrum efficiency and space efficiency based on impedance matching and relay resonance, the method including detecting an input impedance at a resonant frequency, matching a transmitting port impedance to a real number value of the detected input impedance, and transmitting power to a receiving resonator smaller than a transmitting resonator using the relay resonator.

Abstract: The present invention relates to a method for reducing an average time period adopted at the time of evaluating an effect of electromagnetic fields of a mobile communication base station near the mobile communication base station on a human body and measurement is performed for 6 minutes at a predetermined measurement point for acquiring a whole body average by comparing a site measurement result targeting multiple base stations and uncertainty by repetitive measurement and when a 6-minute average value and an average value for a reduced time period which is shorter than 6 minutes are compared with each other, a standard deviation is equal to or lower than a predetermined level, e.g., 0.4 dB, it is sufficient even by the measurement for the reduced time period which is shorter than 6 minutes.

Abstract: A transportation apparatus configured to travel on rails and having an induced freezing rail system includes: a transportation vehicle having a support unit configured to support a frame from the rails; and a freezing rail system comprising freezing rails positioned on a ground surface corresponding to the support unit of the transportation vehicle, the freezing rails having a refrigerant and cooling devices.

Abstract: A volume-rate food-waste disposal apparatus recognizes a user who discharges food-waste into the food-waste disposal apparatus to produce source information and weights the food-waste to produce weight information. The food-waste disposal apparatus receives an electrical power in a wireless manner and dries the food-waste using magnetic waves. The food-waste disposal apparatus transmits the source information and the source information to a charging server so that an on-line food-waste disposal fee per source is billed on a basis of a prefixed food-waste disposal fee per weight.

Abstract: Provided is a battery charging method using wireless power transmission, the method including: receiving a first message associated with a battery charge start from a reception apparatus; discovering an optimal frequency band for a transmit power signal to be transmitted to the reception apparatus based on the first message; receiving, from the reception apparatus, a second message that includes an extra power value and a charge power value, and is associated with a charge state of the reception apparatus; and adaptively controlling transmit power so that the extra power value is maintained to be constant in proportion to a relationship between the charge power value and a first parameter, based on the second message.

Abstract: A resonator structure for a wireless power transfer system Includes resonators, which are to transfer wireless power, and a dielectric substance, which includes at least one exposure region formed on the dielectric substance to fix the resonators in a covered shape and to selectively expose parts of the resonators.

Abstract: Provided is a small monopole antenna, which can generate a plurality of resonant frequencies, have a high antenna efficiency, and be easily installed. The antenna includes a first antenna element formed of a coaxial cable; a second antenna element sealing the first antenna element and sharing a feed point with the first antenna element; and a feeder cable for feeding electric power to the feed point. This antenna is applied as a small antenna.

Abstract: Provided is a shaped-beam antenna having a multi-layered conductive element array surrounded by a dielectric ring. The shaped-beam antenna includes: a planar excitation element having a radiation structure according to a required polarization; a multi-layered conductive element array disposed on the planer excitation element, wherein the multi-layered conductive element array is formed by layering conductive elements at an arbitrary interval; and a dielectric ring surrounding the multi-layered conductive element array at a predetermined separation distance therefrom. Accordingly, it is possible to reduce the entire size of the shaped-beam antenna and manufacturing costs thereof.

Abstract: Provided is a loop antenna. The loop antenna includes a first antenna element embodied as a coaxial cable, a second antenna element embodied as a line and connected to one end of the first antenna element in series, a third antenna eLement embodied as a line, having one end connected to a ground plane and the other end connected to the other end of the first antenna element in series, and a power feeding cable for supplying power to the second antenna element.

Abstract: A 4-port strip line cell for generating standard near fields includes an upper conductor, a third port, a first port, a lower conductor, a second port and a fourth port. The third port supplies a power signal to the upper conductor. The first port terminates the upper conductor. The lower conductor is disposed to be spaced apart from the upper conductor. The second port is connected to the lower conductor so as to supply a power signal in the opposite direction of the third port. The fourth port terminates the lower conductor.

Abstract: An apparatus for transmitting wireless energy in an energy transmission system includes a transmission resonator block configured to have a plurality of transmission resonators arranged therein, a transmission signal generation block configured to generate an energy signal, a switch block connected to the plurality of transmission resonators and configured to switch the energy signal to the plurality of transmission resonators in response to a switching control signal, and a control block configured to generate the switching control signal for switching the energy signal to a transmission resonator including a transmission region where a receiver is placed when detecting the receiver placed in the transmission regions of the plurality of transmission resonators.

Abstract: A method for wirelessly receiving energy and data, including: a resonation operation of resonating a first frequency power signal transmitted from a transmission apparatus; a reception operation of receiving a second frequency data signal transmitted from the transmission apparatus; a first matching operation of matching input/output impedance upon receiving the first frequency power signal; a rectification operation of rectifying impedance-matched power signal from the first matching operation into a DC current; a second matching operation of matching input/output impedance upon receiving the second frequency data signal; an oscillation operation of outputting a second frequency signal by using the first frequency signal output from the resonation operation, as a reference frequency; and a frequency mixing operation of mixing the impedance-matched data signal from the second matching operation with the signal output from the oscillation operation to restore a baseband data signal.