A 2.45-GHz Rectifier-Booster Regulator With Impedance Matching Converters for Wireless Energy Harvesting

Fan, Shiquan, Yuan, Zheyi, Gou, Wei, Zhao, Yang, Song, Chaoyun, Huang, Yi ORCID: 0000-0001-7774-1024, Zhou, Jiafeng ORCID: 0000-0001-5829-3932 and Geng, Li (2019) A 2.45-GHz Rectifier-Booster Regulator With Impedance Matching Converters for Wireless Energy Harvesting IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, 67 (9). pp. 3833-3843. ISSN 0018-9480, 1557-9670

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Abstract

In this paper, a proof-of-concept high-efficiency rectifier-booster regulator (RBR) with an impedance matching converter operating at 2.45 GHz is proposed. An entire WLAN energy harvesting system is demonstrated. A flower-shaped broadband dual-polarized cross dipole antenna with a full-wave matching network is employed to harvest electromagnetic energy from a WiFi router. A novel RBR is proposed to rectify the RF energy to dc and boost the output voltage. It is evolved from a Greinacher rectifier and two Cockcroft–Walton charge pumps to form a full-wave rectifier. An equivalent resistance model is established to evaluate the optimal stage of the RBR. Furthermore, a boost converter is designed as an impedance matching converter to harvest as much energy as possible from the RBR and store the energy into a 1-mF supercapacitor. Experimental results show that the RBR can provide 1.7-V output voltage under −10-dBm input power. In addition, the RBR can achieve up to $\times 3.4$ voltage boosting with 85% voltage conversion rate (VCR) and provide a higher than 1-V output voltage within a distance of 50 cm between an antenna with 20-dBm transmitting power and the rectenna. The excellent performance shows the wide practicality of the proposed design method for the Internet-of-Things (IoT) applications.

Item Type:	Article
Uncontrolled Keywords:	Dipole antennas, Cockcroft-Walton charge pump, Greinacher rectifier, impedance matching converter, Internet of Things (IoT), rectenna, WLAN energy harvesting
Depositing User:	Symplectic Admin
Date Deposited:	10 May 2019 14:42
Last Modified:	16 Jun 2026 14:39
DOI:	10.1109/TMTT.2019.2910062
Related Websites:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3040629
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