Employment of Planar Coil and DGS based Resonators for Hybrid WPT System Realization

A hybrid methodology for developing the wireless power transfer (WPT) system is proposed in this paper. The transmitting $( Tx)$ resonator of the designed WPT with dimensions 40-by-40 sq. mm uses the advantage of the planar coil-based approach. On the other hand, the receiving resonator $(Rx)$ is miniaturized through the defected ground structure-based technique that resulted in the two times size reduction (20-by-20 sq. mm). Furthermore, the optimization of Tx and Rx is performed for the development of the hybrid WPT system. Finally, realized WPT, operating at 300 MHz, demonstrated a power transfer efficiency of 66%.