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Radio power transmission apparatus and radio power transmission system

  • US 9,899,875 B2
  • Filed: 06/26/2012
  • Issued: 02/20/2018
  • Est. Priority Date: 06/26/2012
  • Status: Expired due to Fees
First Claim
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1. A radio power transmission apparatus comprising:

  • a transmitter having a power transmitting antenna for transmitting electromagnetic waves and at least one power transmitting circuit; and

    a receiver having a power receiving antenna for receiving electromagnetic waves and at least one power receiving circuit, wherein;

    on the basis of power reflected from the power transmitting antenna, the power transmitting circuit executes control of an imaginary part of an internal impedance of the power transmitting circuit to change a circuit reactance of the power transmitting circuit in order to control an imaginary part of power of the electromagnetic waves to be transmitted; and

    on the basis of a value of power received by the receiver through the power receiving antenna, the value of power transmitted from the receiver to the transmitter by using electromagnetic waves of power transmission, the power transmitting circuit executes control of a real part of the internal impedance of the power transmitting circuit to change a circuit resistance of the power transmitting circuit or a characteristic impedance of the power transmitting circuit in order to control the real part of power of the electromagnetic waves to be transmitted.

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