A power collecting circuit for WPT system using sheet-like waveguide

In Wireless Power Transmission system using a sheet-like waveguide, an unused power is terminated by a dummy load at the end of waveguide. To reuse this unused power, this paper proposes a power collecting circuit using a phase shifter to feedback the unused power with in-phase for a source. In a prototype experiment, up to 95% of the unused power is collected by our method and we could save 61% of the input power of this WPT system. We also present a transit analysis of the power collecting experiment by simulation. As a result, the phase adjustment enhances the combined power by 4.1 dB in this power collecting system. Therefore, these results demonstrated that the power collecting experiment was effectively.