High-efficiency CMOS rectifier dedicated for multi-band ambient RF energy harvesting

Author

Wang, Y. ; Sawan, M.

Author_Institution

Polystim Neurotechnologies Lab., Polytech. Montreal, Montreal, QC, Canada

fYear

2014

Firstpage

179

Lastpage

182

Abstract

Several rectifier topologies dedicated for radio frequency (RF) energy harvesting have been proposed, but only a few have been reported to be able to harvest RF energy at low input power (LIP) levels. In this paper, we are focusing on fully gate cross-coupled (FGCC) rectifier structure, which gives good performance at LIP levels. In order to get an enough high output DC voltage, a 3-stage FGCC rectifier using low-threshold-voltage (LTV) transistors is designed. According to simulation results, with 850MHz input AC signal, the designed rectifier has power conversion efficiency (PCE) of 70% at 20μW (-17.0dBm) input power with 100kOhms load. Also, a multi-band RF energy harvesting topology is proposed. Simulation results show that PCE of the tri-channel rectifier achieves 66.3% at 4.8μW (-23.2dBm) input power per channel and 1V DC output voltage is generated at 5.1μW (-22.9dBm) input power per channel with only 100kOhms load, showing both high-efficiency and sensitivity.

Keywords

CMOS logic circuits; UHF transistors; energy harvesting; integrated circuit design; logic design; logic gates; rectifiers; 3-stage FGCC rectifier; frequency 850 MHz; fully gate cross-coupled rectifier structure; high output DC voltage; high-efficiency CMOS rectifier; low input power levels; low-threshold-voltage transistor design; multiband ambient RF energy harvesting topology; power 20 muW; power 4.8 muW; power conversion efficiency; trichannel rectifier; voltage 1 V; Antennas; Energy harvesting; Radio frequency; Rectifiers; Simulation; Threshold voltage; Transistors; CMOS; RF energy harvesting; Rectifier; low-threshold-voltage transistors;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics, Circuits and Systems (ICECS), 2014 21st IEEE International Conference on

Type

conf

DOI

10.1109/ICECS.2014.7049951

Filename

7049951