| 摘要 |
PROBLEM TO BE SOLVED: To provide a wireless power feeding device having a wireless communication control function capable of optimizing power efficiency at wireless power feeding, without deteriorating communication quality at wireless communication.SOLUTION: A wireless power feeding device includes: a reception antenna; a control circuit having a wireless communication function conforming to a communication standard; an impedance matching circuit, connected between the reception antenna and the control circuit, for performing impedance matching between the reception antenna and the control circuit; a conversion circuit for converting AC power into a DC voltage; a resonance circuit, connected between the reception antenna and the conversion circuit, for receiving electromagnetic energy received by the reception antenna in a resonant condition, to output AC power; and a switch circuit for selectively connecting the reception antenna to the impedance matching circuit or the resonance circuit on the basis of a control signal from the control circuit. The wireless power feeding device controls the switch circuit to connect the reception antenna to the impedance matching circuit at wireless communication, and connect the reception antenna to the resonance circuit at wireless power feeding. |
