Adaptive impedance tuning in wireless power transmission

A method, comprising:

• receiving a wireless power signal from a wireless power transmitter at a wireless power receiver including a resonant circuit having a resonant circuit impedance;
• rectifying the wireless power signal to a direct current input signal;
• converting the direct current input signal to a direct current output signal;
• and
• adjusting a power output of the direct current output signal based in part on the direct current input signal to modify the resonant circuit impedance and to adjust a receive bandwidth of the wireless power receiver.

A wireless power receiver, comprising:

• means for receiving a wireless power signal from a wireless power transmitter, the receiving means having a resonant impedance;
• means for rectifying the wireless power signal to a direct current input signal;
• means for converting the direct current input signal to a direct current output signal;
• and
• means for modifying an alternating current impedance of the receiving means comprising means for adjusting, based at least in part on the direct current input signal, an input converter impedance of the means for converting the direct current input signal to a direct current output signal based at least in part on the direct current input signal, to modify the resonant impedance.