Design of efficient rectifying circuit for RF energy harvesting applications

Abstract

This paper presents a new design of rectifying circuit for RF energy harvesting application over 900 MHz band of frequency. The proposed rectifying circuit employs the Dickson charge pump rectifier with a novel optimized matching unit. This matching unit is comprised of radial stubs, open stubs, and evolves by the usage of interdigital capacitors. The rectifying circuit is simulated using Advance design software (ADS), and provides maximum RF to DC conversion efficiency of 77% at the frequency of 900 MHz. The extracted layout of the circuit is found to be 7 × 5 × 1.6 cm3, which can be considered to be quite compact at the operating frequency.