Third Harmonic Receiver Tracking for Far Field Wireless Power Transfer

A novel closed-loop wireless power transfer system for short-range indoor application is proposed in this article. Precise position estimation of the receiver using the third harmonic as the feedback signal towards the transmitter, proposed herein, yields a better tracking accuracy which in turn can contribute to enhanced overall efficiency of the WPT system. Proposed concept addresses and mitigates the critical challenge of antenna alignment mismatch in the far-field WPT system. The proposed concept may be adapted and extended to a moving receiver as well as multi-receiver environment. Verification of the concept using practical measurements are currently under progress and will be presented in the conference.