A COMPARATIVE STUDY: VOLTAGE MULTIPLIERS FOR RF ENERGY HARVESTING SYSTEM

Year 2019, , 12 - 23, 30.06.2019

Filiz Sarı , Yunus Uzun

https://doi.org/10.33769/aupse.469183

Cited By: 9

Abstract

Voltage multipliers are
widely used for energy harvesting processes to convert the received AC signal
to DC signal, also enhanced the low level received signal. In this study,
Villard, Dickson and Greinacher type voltage multipliers are analyzed without
impedance matching and substrate materials to decide the effective voltage
multiplier type depend on the inputs of the harvester. So, load resistance,
input power and input frequencies’ effects are analyzed and compared with each
other. Agilent Advanced Design System (ADS) is used for simulations. HSMS 2852
Schottky diode and capacitors are used for these voltage multipliers. Results
show that, determining load resistance is important for evaluating high
efficiency, e.g. efficiency differences are reached 33% between 2kΩ and 20 kΩ
for Dickson voltage multiplier at 100 MHz input frequency. Furthermore, the
best efficiency is obtained by Greinacher voltage multiplier for low input
frequencies which is lower than 1 GHz but there are no significant differences
are observed for high frequencies. This study shows that load resistance, input
frequency and input power are important parameters for voltage multiplier
selection and Greinacher voltage multiplier is the best choice to obtain
high efficiency for low frequency application of RF harvesting.

Keywords

RF energy harvesting, voltage multiplier types, efficiency

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