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Sensors 2017, 17(8), 1763; https://doi.org/10.3390/s17081763

Impedance Matching Antenna-Integrated High-Efficiency Energy Harvesting Circuit

1
Graduate School of Sciences and Electrical Engineering, Kyushu University, Fukuoka 819-0395, Japan
2
Electronics Research Institute, Dokki, Giza 12622, Egypt
*
Author to whom correspondence should be addressed.
Received: 21 July 2017 / Revised: 27 July 2017 / Accepted: 29 July 2017 / Published: 1 August 2017
(This article belongs to the Special Issue Wireless Rechargeable Sensor Networks)

Abstract

This paper describes the design of a high-efficiency energy harvesting circuit with an integrated antenna. The circuit is composed of series resonance and boost rectifier circuits for converting radio frequency power into boosted direct current (DC) voltage. The measured output DC voltage is 5.67 V for an input of 100 mV at 900 MHz. Antenna input impedance matching is optimized for greater efficiency and miniaturization. The measured efficiency of this antenna-integrated energy harvester is 60% for −4.85 dBm input power and a load resistance equal to 20 kΩ at 905 MHz. View Full-Text
Keywords: energy harvesting circuit; impedance matching; antenna; rectifier; radiofrequency energy harvesting circuit; impedance matching; antenna; rectifier; radiofrequency
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Shinki, Y.; Shibata, K.; Mansour, M.; Kanaya, H. Impedance Matching Antenna-Integrated High-Efficiency Energy Harvesting Circuit. Sensors 2017, 17, 1763.

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