摘要:
Disclosed are an apparatus and a method for recognizing a location of an object using radio frequency Identification (RFID). The method for recognizing a location of an object includes: activating tags located around radio frequency identification (RFID) tags by transmitting power to the RFID tags in a magnetic resonance type; transmitting a call signal for identifying a mobile tag attached to an object; receiving a tag identifier of the mobile tag corresponding to the call signal; receiving location information from fixed tags around the mobile tag; and recognizing the location of the mobile tag using the location information.
摘要:
A wireless power transfer apparatus includes: a transmitting coil into which a current having a predetermined frequency is introduced; a receiving coil configured to supply a current induced by electromagnetic induction to a load; and a transmission-side resonant coil and a reception-side resonant coil positioned between the transmitting coil and the receiving coil, configured to provide the current flowing in the transmitting coil to the receiving coil through electromagnetic induction, and spaced a predetermined distance from each other. Each of the resonant coils has a spiral structure.
摘要:
An apparatus for reducing a radiation power and an electric field includes a transmission end energy transfer unit configured to include a feeding roof and a transmission coil, a receiving end energy transfer unit configured to be symmetrically separated from the transmission end energy transfer unit at a predetermined distance, and to include a receiving roof and a receiving coil, a first electric field shield configured to be made of a nonconductor, to have a shape surrounding the transmission end energy transfer unit, and to have an empty space of a predetermined first thickness; and a second electric field shield to be made of a nonconductor, to have a shape surrounding the receiving end energy transfer unit, and to have an empty space of a predetermined second thickness, wherein the empty spaces are filled with a dielectric material for shielding the electric field.
摘要:
An apparatus for measuring radiated power of a terminal includes: an enclosure including a pair of couplers configured to couple an electromagnetic field radiated from the terminal or a substitution antenna and a measurement jig configured to rotate the terminal or the substitution antenna, the terminal or the substitution antenna being supposed to be arranged between the pair of couplers, with reference to at least one of X, Y, and Z axes; a driver installed outside the enclosure to drive the measurement jig; a signal generator configured to generate a feed signal transferred to the substitution antenna when the substitution antenna is arranged on the measurement jig; a feed signal transmitter configured to transfer the feed signal generated by the signal generator to the substitution antenna; and a spectrum analyzer configured to measure power of a radiated signal radiated from the terminal or the substitution antenna.
摘要:
Provided is an apparatus for harvesting energy from a microwave. An apparatus for harvesting energy from a microwave in an electricity storage system of a building, includes: a plurality of rectennas arranged with a predetermined length according to characteristic of microwave to be absorbed, and configured to collect microwave in the atmosphere and convert the collected microwave into electric energy; a current converter configured to convert the electric energy outputted from the rectennas into a storable current; and a charging tank configured to store the current outputted from the current converter, wherein the arranged rectennas are attached to an outer wall of the building, and the rectennas attached to the top of the building are printed in a transparent conductor on the surface of a solar cell.