Patent ID: 8829728

Claim:
A power generator comprising: a power generating section configured to output DC energy; an oscillating section configured to convert the DC energy into RF energy with a frequency f 0 ; a power-transmitting antenna that is a series resonant circuit having a resonant frequency fT that is set to be substantially equal to the frequency f 0 , and configured to transmit the RF energy; a power-receiving antenna that is a parallel resonant circuit having a resonant frequency fR that is set to be substantially equal to the frequency f 0 , and configured to receives at least a part of the RF energy that has been transmitted by the power-transmitting antenna; a rectifying section configured to convert the RF energy that has been received by the power-receiving antenna into DC energy; an impedance matching section for oscillating section that is arranged between the oscillating section and the power-transmitting antenna, and configured to match an input impedance of the power-transmitting antenna to an output impedance of the oscillating section; and a transmitting-end control section configured to match an input impedance of the oscillating section to an output impedance of the power generating section by changing the input impedance of the oscillating section in accordance with a variation in the output impedance of the power generating section, and configured to match an input impedance of the impedance matching section for oscillating section to the output impedance of the oscillating section by changing the input impedance of the impedance matching section for oscillating section in accordance with the variation in the output impedance of the power generating section.