Non-radiative wireless energy transfer with single layer dual-band printed spiral resonator

Lai Ly Pon (Universiti Teknologi Malaysia)
Sharul Kamal Abdul Rahim (Universiti Teknologi Malaysia)
Chee Yen Leow (Universiti Teknologi Malaysia)
Tien Han Chua (Universiti Teknologi Malaysia)

Bulletin of Electrical Engineering and Informatics
Vol 8, No 3: September 2019

Accomplishing equilibrium in terms of transfer efficiency for dual-band wireless energy transfer (WET) system remains as one of key concerns particularly in the implementation of a single transmitter device which supports simultaneous energy and data transfer functionality. Three stages of design method are discussed in addressing the aforementioned concern. A single layer dual-band printed spiral resonator for non-radiative wireless energy transfer operating at 6.78 MHz and 13.56 MHz is presented. By employing multi-coil approach, measured power transfer efficiency for a symmetrical link separated at axial distance of 30 mm are 72.34% and 74.02% at the respective frequency bands. When operating distance is varied between 30 mm to 38 mm, consistency of simulated peak transfer efficiency above 50% is achievable.