Design and simulation of medium wave-based RF energy harvesting system with feedforward controlled DC to DC boost converter

In this paper, the design and simulation of a novel DC-DC boost converter is proposed which is used to enhance the output voltage of a radio frequency energy harvesting system from medium wave broadcasting at the near field. The radio frequency energy transmitted from the high power medium wave transmitters at the band of 750 KHz–2 MHz is received by a ferrite rod antenna and converted it to a DC signal by using 5th stage Dickson voltage multiplier. A DC to DC boost converter along with a pulse width modulated controller having a switching frequency of 50 KHz is designed where the duty cycle can be adjusted. The circuit is designed for a fixed input radio frequency signal of 0.5 V which is tuned at 759 KHz of the medium wave frequency band. The maximum output voltage is observed to be 5.14 V at a duty cycle of 0.1 and load resistance of 1 KΩ. The output voltage can be changed by varying the duty cycle for different applications. The maximum power efficiency observed for the boost converter is 87.9% at load resistance of 100 Ω. © 2021 Inderscience Enterprises Ltd.