Design and Analysis of Wireless Power Transfer using Stacked Coil PCB for Inductive Power Charging

A wireless power system or wireless power transfer is an alternative for energy distribution using air or wireless media. This electrical energy transmission uses air as the medium to distribute energy where the energy source and load are located far apart. Therefore, many researchers are trying to increase the mutual coupling between coils to increase efficiency. One of the ways to improve mutual coupling is using a stacked coil PCB. Based on the proposed design, a rectangular design using FR4 PCB with dimensions of $5.4 \times 5.4 {\mathrm {cm}}$. Stacked coil fabrication with 5 turns as a transmitter and on the receiving side of a Stacked coil of 10 turns and a non-stacked coil of 1 turn as a comparison. Obtained from the S21 measurement received by the 10 turns coil, it has a value of 25dB with VNA and −29dB with SA, and −16dB with simulation. While the results from winding 1 with a distance of 5 cm obtained an S21 the values are −44dB, −52dB, and −37dB respectively.