Shahed University

Optimum Design of RF-to-DC Energy Conversion Circuits for Wireless Powered Applications

Z. Ehsanbakhsh | Mohsen Jalali

URL :   http://research.shahed.ac.ir/WSR/WebPages/Report/PaperView.aspx?PaperID=137417
Date :  2018/11/03
Publish in :    بيست و ششمين کنفرانس مهندسي برق
DOI :  https://doi.org/10.1109/ICEE.2018.8472623
Link :  http://dx.doi.org/10.1109/ICEE.2018.8472623
Keywords :RF Energy Harvesting; Dynamic Body Bias; Voltage Multiplier

Abstract :
In this paper, RF-to-DC voltage rectifier and multiplier circuits for RF power harvesting have been thoroughly investigated. Based on pre-biasing scheme of rectifying devices, a method for their optimum design is presented resulting in improved efficiency in terms of higher output voltage. The impact of positive and negative gate biasing voltage is analyzed and are compared and then possible circuits for their implementation are proposed. It is shown that a negative gate bias is very effective for scavenging ultra-low RF power levels while a positive gate bias can prove useful for high input power levels. All the circuits are implemented in a 180 nm standard CMOS process. The bulk terminal of PMOS and NMOS transistors are connected to the output and reference ground, respectively, to prevent turning the drain and source junction diode of the transistors on.

http://dx.doi.org/10.1109/ICEE.2018.8472623

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