DESIGN OF HIGH EFFICIENCY RF-DC CONVERSION CIRCUIT USING NOVEL TERMINATION NETWORKS FOR RF ENERGY HARVESTING SYSTEM

摘要

In this letter, a high efficiency RF-DC conversion circuit for RF energy harvesting system (EHS) is proposed. The proposed circuit consists of Villard voltage doubler, the input and output termination networks which can suppress the unwanted RF signals produced by Schottky diodes. The fabricated circuit operating at 2.45 GHz has a maximum RF-DC conversion efficiency of 83.37% and output voltage of 11.30 V at an input RF power of 140 mW. The proposed circuit has an advantage of simple design which helps to reduce the design cost of EHSs.