A study on low power rectenna using DC-DC converter to track maximum power point

Author

Yong Huang ; Shinohara, Nobuhiro ; Mitani, Tomonori

Author_Institution

Dept. of Electr. Eng., Kyoto Univ., Kyoto, Japan

fYear

2013

fDate

5-8 Nov. 2013

Firstpage

83

Lastpage

85

Abstract

This study proposed a maximum power point tracking (MPPT) method for an mW low power RF-DC rectenna by using a DC-DC converter. The conversion efficiency of RF-DC rectifier circuit is affected by the load and the input power. In order to solve this problem, an RF-DC-DC circuit is proposed which consists of a RF-DC rectifier circuit and a DC-DC converter in this study. We designed a Buck-Boost converter with stable input impedance to match the optimal load of rectenna. The measured RF to DC efficiency of rectifier is almost steady at 75% in spite of the load resistance changed from 100 Ω to 5000 Ω when we connected the proposed Buck-Boost converter to the rectenna. The total efficiency of RF-DC-DC circuit is almost still over 60% even though the load resistance changed from 100 Ω to 5000 Ω with the input power of 82 mW.

Keywords

electric resistance; impedance matching; low-power electronics; maximum power point trackers; microwave circuits; microwave power transmission; rectennas; rectifying circuits; DC-DC converter; MPPT method; RF-DC rectifier circuit; RF-DC-DC circuit; buck-boost converter design; impedance matching; load resistance; low power RF-DC rectenna; maximum power point tracking; power 82 mW; Impedance; Microwave circuits; Rectennas; Rectifiers; Rectifying circuits; Resistance; DC-DC converter; RF-DC conversion efficiency; RF-DC-DC circuit; low power rectenna; maximum power point tracking;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference Proceedings (APMC), 2013 Asia-Pacific

Conference_Location

Seoul

Type

conf

DOI

10.1109/APMC.2013.6695198

Filename

6695198