Patent ID: 8952573
Filing Date: 2015-02-10
Classification: H01F,H02J

Abstract:
1. A power generator comprising: a power generating section that outputs DC energy; an oscillator that converts the DC energy into RF energy having a frequency f0; a first antenna that transmits the RF energy, the first antenna including a first inductor and a first capacitor that are connected together in series to form a series resonant circuit with a resonant frequency fT; a second antenna that receives, by coupling a resonant magnetic field, at least a part of the RF energy that has been transmitted by the first antenna, the second antenna including a second inductor and a second capacitor that are connected in parallel with each other to form a parallel resonant circuit with a resonant frequency fR; and an output converting section that converts the RF energy that has been supplied from the second antenna into AC energy having a lower frequency than the RF energy, wherein the resonant frequencies fT and fR are set to be substantially equal to the frequency f0 of the RF energy, and if the oscillator has a voltage step-up ratio Voc, the output converting section has a voltage step-up ratio Vtr, the first inductor has an inductance L1, the second inductor has an inductance L2, and the first and second antennas have a coupling coefficient k, the power generator satisfies (L2/L1)≧(k/(Voc×Vtr))