New design of RF-DC rectifier circuit for radio frequency energy harvesting

Radio frequency (RF) energy harvesting can be an attractive alternative energy capable of replacing all or some of the board batteries. The energy harvesting circuit must supply 1V voltage at minimum that is able to operate a sensor. The main element in the energy harvesting circuit [1] is an RF-DC rectifier. This article presents a new architecture RF-DC rectifier circuit using the MOSFET transistors. Our proposed circuit is a combination of a rectifier cascade using the Dynamic threshold Voltage Cancellation (DVC) [2] and the technique of the Internal threshold Voltage Cancellation (IVC) [3]. The technology used is CMOS 0,18μm from TSMC and the simulations were performed using the ADS (Advanced Design System) Simulator. The simulations are performed on the proposed circuit composed by two stages. This proposed rectifier uses an RF input signal voltage of 350mV with a frequency of 915MHz. Our proposed circuit gives an output voltage of 1.1V.