Abstract: Provided is a wireless power transmitting system and device, the wireless power transmitting device including: a signal generator configured to generate an initial signal; a controller configured to output an amplitude control signal and a phase control signal; a phase modulator configured to generate a phase-modulated signal by modulating a phase of the initial signal based on the phase control signal; a power amplifier configured to generate a power signal by amplifying the phase-modulated signal; a voltage converter configured to control a magnitude of a power voltage of the power amplifier based on the amplitude control signal; and an antenna configured to externally output the power signal.

Abstract: A wireless power receiving device includes rectennas configured to generate sub-direct current (DC) powers based on sub-alternating current (AC) powers, a DC power combining circuit, processing circuitry configured to divide the rectennas into first to third groups based on power distribution information and first and second reference values, the power distribution information being based on the sub-AC powers, generate a control signal based on the first to third groups including different numbers of rectennas, control the DC power combining circuit to perform a series connection and a parallel connection for the plurality of sub-DC powers based on the control signal, the DC power combining circuit being configured to generate a combined DC power by performing a power synthesis based on the series connection and the parallel connection, and generate an output power based on the combined DC power, and a battery configured to store the output power.

Abstract: Provided is a wireless power transmitting system and device, the wireless power transmitting device including: a signal generator configured to generate an initial signal; a controller configured to output an amplitude control signal and a phase control signal; a phase modulator configured to generate a phase-modulated signal by modulating a phase of the initial signal based on the phase control signal; a power amplifier configured to generate a power signal by amplifying the phase-modulated signal; a voltage converter configured to control a magnitude of a power voltage of the power amplifier based on the amplitude control signal; and an antenna configured to externally output the power signal.

Abstract: A system includes a radio frequency (RF) device outputting an RF signal; and at least one sensor device generating a power supply voltage using the RF signal output from the RF device, and operating by the power supply voltage, wherein the sensor device includes a case; a plurality of detectors disposed in the case, and collecting environmental data of a space in which the RF device and the sensor device are input, to generate detection data; a battery supplying a power supply voltage necessary for operation of the plurality of detectors; and a charger charging the battery, wherein the charger includes an antenna installed in the case and receiving RF power from an external source, an RF-DC converter converting an alternating current voltage corresponding to the RF power into a direct current voltage, a matching circuit connected between the antenna and the RF-DC converter, and a DC-DC converter adjusting a level of the direct current voltage and charging the battery.

Abstract: Provided is an electronic device including a matching circuit having different matching impedance values according to connection states of the plurality of switches, and configured to output a matching power signal by impedance matching an input power signal, a power conversion circuit configured to convert the matching power signal into an output power signal, and a controller configured to set the matching impedance value of the matching circuit by transmitting a switching signal for adjusting the connection states of the plurality of switches to the plurality of switches, wherein the controller is further configured to receive the output power signal from the power conversion circuit while changing the matching impedance value, select an optimal matching impedance value based on a plurality of output power signals that are received, and set the optimal matching impedance value as the matching impedance value.

Abstract: A wireless power transmission system including: a first wireless power transmitter to receive a beacon signal through a first array antenna unit, estimate a characteristic of a first wireless channel based on the beacon signal, and generate and output first power signals, wherein phases and amplitudes of the first power signals are adjusted based on a characteristic of the first wireless channel and a time reversal algorithm; and a first wireless power receiver to output the beacon signal through a first antenna unit, receive the first power signals through the first antenna unit, and generate an operating voltage based on the first power signals, wherein the first power signals are adjusted differently based on a quantity of wireless power transmitters, a quantity of wireless power receivers, a movement of the first wireless power transmitter, or a movement of the first wireless power receiver.

Abstract: A sensor device includes a first substrate, a second substrate on the first substrate, a plurality of detection units between the first substrate and the second substrate and configured to collect detection information from plasma formed in a space above the second substrate, a controller configured to generate characteristic data representing characteristics of the plasma based on the detection information collected by the plurality of detection units, and a power supply unit including a radio frequency (RF) energy harvester configured to produce power for operation of at least one of the plurality of detection units and the controller from RF power used to form the plasma.

Abstract: The present disclosure relates to an artificial intelligence (AI) system which simulates functions such as cognition, judgment, and the like of the human brain by utilizing machine learning algorithms such as deep learning and the like, and to an application thereof.

Abstract: The present disclosure relates to an artificial intelligence (AI) system which simulates functions such as cognition, judgment, and the like of the human brain by utilizing machine learning algorithms such as deep learning and the like, and to an application thereof.