A dual-band integrated wireless energy harvesting system

This paper proposes a 2.45/5.8GHz simultaneously working dual-frequency rectenna for an integrated wireless energy harvesting system. A 2.45/5.8GHz receiving antenna is designed to receive RF (Radio Frequency) energy. To achieve a dual-frequency synchronized working rectifying circuits, a new design of 2.45/5.8GHz rectifying circuit utilizing reverse series output mode is proposed. With 0dBm input power, the simulated conversion efficiency of the rectifying circuit is higher than 60% and the measured conversion efficiency is higher than 20% when the dual frequency rectifying circuits work together. The rectenna is validated in an integrated wireless energy harvesting system. The measurement results show that the rectenna can be used to harvest energy for low-power electronic devices.