Impedance Matching Antenna-Integrated High-Efficiency Energy Harvesting Circuit

Yuharu Shinki; Kyohei Shibata; Mohamed Mansour; Haruichi Kanaya

doi:10.3390/s17081763

Impedance Matching Antenna-Integrated High-Efficiency Energy Harvesting Circuit

Sensors (Basel). 2017 Aug 1;17(8):1763. doi: 10.3390/s17081763.

Authors

Yuharu Shinki¹, Kyohei Shibata², Mohamed Mansour^{3

4}, Haruichi Kanaya⁵

Affiliations

¹ Graduate School of Sciences and Electrical Engineering, Kyushu University, Fukuoka 819-0395, Japan. yuharu.917@gmail.com.
² Graduate School of Sciences and Electrical Engineering, Kyushu University, Fukuoka 819-0395, Japan. 2ie16656p@s.kyushu-u.ac.jp.
³ Graduate School of Sciences and Electrical Engineering, Kyushu University, Fukuoka 819-0395, Japan. 3IE16613T@s.kyushu-u.ac.jp.
⁴ Electronics Research Institute, Dokki, Giza 12622, Egypt. 3IE16613T@s.kyushu-u.ac.jp.
⁵ Graduate School of Sciences and Electrical Engineering, Kyushu University, Fukuoka 819-0395, Japan. kanaya@ed.kyushu-u.ac.jp.

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.

Keywords: antenna; energy harvesting circuit; impedance matching; radiofrequency; rectifier.