Investigations of A Simplified PCB-Based Wireless Power Resonator Operating at 13.56MHz

This paper presents a new printed-circuit-board (PCB) resonator suitable for 13.56MHz wireless power transfer (WPT) applications. Unlike conventional wire-wound coils, the PCB-based coils do not require additional discrete capacitors and can be used for wireless energy transmission at high frequencies in the megahertz range with high Q values. In this paper, the equivalent circuit model of the PCB-based wireless charging coil is also analyzed, and a suitable circuit model distributed-circuit model of the PCB resonator structure is obtained for further optimization of the coil. An experimental-based study is conducted between the commonly used circular planar helical coils are divided into different square polygons for the study of equivalent models, and the square polygonal planar helical coils suitable for circuit modelling are derived with sufficient accuracy by means of simulation as well as experimental verification. PCB resonators are constructed to form WPT systems for practical evaluation both simulation and practical results are included to confirm the accuracy of the PCB resonator model and the advantages of the high-frequency resonator structure.