Single-coil Design Approach for Dual-band Near-field Coupled Resonators

With the adoption of single coil approach, printed spiral resonator design strategy for near-field wireless energy transfer is presented. A pair symmetrical resonators operating at high frequency band specifically 6.78 MHz and 13.56 designed. Simulated power efficiency (PTE) over 88% are obtained both frequencies when coupled separated a distance 25 mm integrated with hybrid compensation network topology. The variance PTE between about 0.04.