Utilization of Meander Line Slots for Enhancing the WPT Efficiency and Transmission Range

This paper presents the development of a highly efficient defected ground structure-based near-field wireless power transfer (WPT) system. The required resonators possess a 30-by-30 sq. mm area and have meander line slots etched on the ground side. The length of the meander line was aptly varied to generate a greater magnetic field around transmitting and receiving resonators. Subsequently, this aided in enhancing the overall WPT performance. Particularly, the realized WPT system, working at 25 mm, demonstrated the power transfer efficiency equal to 81% at 300 MHz.