Included are: an extraction unit (3) provided on a transmission path (2), the transmission path (2) being provided for transmitting a high-frequency wave from a high-frequency wave source (1) to a high-frequency load (6), the extraction unit extracting a r...

A power feeding apparatus, power receiving apparatus, wireless power feeding system, and method for wireless transfer of power are provided. The power feeding apparatus includes an impedance detector, a controller, a power transmitter, a variable matching ...

A wireless power transmission device (100) and method are provided. An amount of power transmitted wirelessly by the wireless power transmission device (100) may be controlled based on information (103) to be transmitted by the wireless power transmission ...