Parasitics Impact on the Performance of Rectifier Circuits in Sensing RF Energy Harvesting
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Alex Amor, Antonio; Moreno Núñez, Javier; Fernández-González, José M.; Padilla De La Torre, Pablo; Esteban, JaimeEditorial
MDPI
Materia
RF energy harvesting Sensor applications Half-wave rectifier Parasitics modeling Cockcroft-Walton multiplier Low-power
Date
2019-11-13Referencia bibliográfica
Alex-Amor, A., Moreno-Núñez, J., Fernández-González, J. M., Padilla, P., & Esteban, J. (2019). Parasitics Impact on the Performance of Rectifier Circuits in Sensing RF Energy Harvesting. Sensors, 19(22), 4939.
Sponsorship
This work was supported in part by the Spanish Research and Development National Program under projects TIN2016-75097-P, TEC2017-85529-C3-1-R and RTI2018-102002-A-I00.Abstract
This work presents some accurate guidelines for the design of rectifier circuits in
radiofrequency (RF) energy harvesting. New light is shed on the design process, paying special
attention to the nonlinearity of the circuits and the modeling of the parasitic elements. Two
different configurations are tested: a Cockcroft–Walton multiplier and a half-wave rectifier. Several
combinations of diodes, capacitors, inductors and loads were studied. Furthermore, the parasitics
that are part of the circuits were modeled. Thus, the most harmful parasitics were identified and
studied in depth in order to improve the conversion e ciency and enhance the performance of
self-sustaining sensing systems. The experimental results show that the parasitics associated with the
diode package and the via holes in the PCB (Printed Circuit Board) can leave the circuits inoperative.
As an example, the rectifier e ciency is below 5% without considering the influence of the parasitics.
On the other hand, it increases to over 30% in both circuits after considering them, twice the value of
typical passive rectifiers.