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Article

Parasitics Impact on the Performance of Rectifier Circuits in Sensing RF Energy Harvesting

1
Departamento de Lenguajes y Ciencias de la Información, Universidad de Málaga, 29071 Málaga, Spain
2
Information Processing and Telecommunications Center, Universidad Politécnica de Madrid, 28040 Madrid, Spain
3
Departamento de Teoría de la Señal, Telemática y Comunicaciones, Universidad de Granada, 18071 Granada, Spain
*
Author to whom correspondence should be addressed.
Sensors 2019, 19(22), 4939; https://doi.org/10.3390/s19224939
Received: 19 September 2019 / Revised: 4 November 2019 / Accepted: 6 November 2019 / Published: 13 November 2019
(This article belongs to the Section Physical Sensors)
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 efficiency 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 efficiency 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. View Full-Text
Keywords: RF energy harvesting; guidelines; sensor applications; low-power; Cockcroft–Walton multiplier; half-wave rectifier; parasitics modeling RF energy harvesting; guidelines; sensor applications; low-power; Cockcroft–Walton multiplier; half-wave rectifier; parasitics modeling
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MDPI and ACS Style

Alex-Amor, A.; Moreno-Núñez, J.; Fernández-González, J.M.; Padilla, P.; Esteban, J. Parasitics Impact on the Performance of Rectifier Circuits in Sensing RF Energy Harvesting. Sensors 2019, 19, 4939. https://doi.org/10.3390/s19224939

AMA Style

Alex-Amor A, Moreno-Núñez J, Fernández-González JM, Padilla P, Esteban J. Parasitics Impact on the Performance of Rectifier Circuits in Sensing RF Energy Harvesting. Sensors. 2019; 19(22):4939. https://doi.org/10.3390/s19224939

Chicago/Turabian Style

Alex-Amor, Antonio, Javier Moreno-Núñez, José M. Fernández-González, Pablo Padilla, and Jaime Esteban. 2019. "Parasitics Impact on the Performance of Rectifier Circuits in Sensing RF Energy Harvesting" Sensors 19, no. 22: 4939. https://doi.org/10.3390/s19224939

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