A magnetically coupled 2-D waveguide power transfer

We propose a coil-patterned waveguide sheet for magnetic coupling in a 2-D waveguide power transfer system (2DWPT). In magnetic resonance wireless power transfer, the coupling coefficient decreases due to flux leakage. Our proposed system can extend the length of the Tx waveguide sheet without reducing the coupling coefficient. The leakage flux can be adjusted by reducing the group velocity in the waveguide sheet. The effectiveness of this waveguide power transfer method is supported by simple theoretical analyses. Our simulation and measurement results concur with the analytical findings and demonstrate that the proposed waveguide sheet can be extended while maintaining practical efficiency.