The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 20, 2018
Filed:
Jun. 26, 2012
Ken Takei, Tokyo, JP;
Ken Takei, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A radio power transmission apparatus comprises a transmitterhaving a power transmitting antennafor transmitting electromagnetic waves and a power transmitting circuit and a receiverhaving a power receiving antennafor receiving electromagnetic waves and a power receiving circuit. In the radio power transmission apparatus, on the basis of power reflected to the power transmitting antenna, the power transmitting circuit executes control to change the circuit reactance of the power transmitting circuit in order to control the imaginary part of power of the electromagnetic waves to be transmitted. In addition, on the basis of a value of power transmitted to the transmitterby using electromagnetic waves of power transmission used by the receiverto transmit a value of power received by the receiverthrough the power receiving antenna, the power transmitting circuit executes control to change the circuit reactance of the power transmitting circuit or the characteristic impedance of the power transmitting circuit in order to control the real part of power of the electromagnetic waves to be transmitted.