A Compact and High-Efficiency Class-F Voltage Doubler Rectifier for Wireless Power Transmission

In this paper, a novel class-F voltage doubler rectifier is proposed for radio frequency energy harvesting (RFEH). In the proposed structure, two different harmonic termination networks are employed to block the harmonics of voltage doubler diodes and reshape current waveform and voltage waveform. Thus, the power conversion efficiency (PCE) of the conventional voltage doubler rectifier can be improved significantly. For validation, a prototype is fabricated and measured. The measured peak PCE is 76.5% with a 13 dBm input power and a 1600 Ω load. Besides, the input power range for PCE high than 50% is from 1.8 to 15.5 dBm.