Fully Integrated Energy Harvesting Circuit With −25-dBm Sensitivity Using Transformer Matching

Author

Goncalves, Hugo ; Martins, Miguel ; Fernandes, Jorge

Author_Institution

Inst. de Eng. de Sist. e Comput., Univ. de Lisboa, Lisbon, Portugal

Volume

62

Issue

5

fYear

2015

fDate

May-15

Firstpage

446

Lastpage

450

Abstract

This brief presents a circuit to harvest energy from radio-frequency electromagnetic waves. It has a front-end transformer that simultaneously matches the harvesting circuit to a standard 50-Ω antenna and provides voltage gain, reducing the “dead-zone” of an 18-stage rectifier. The circuit is designed and prototyped in a standard 130-nm CMOS process with an active area of 200 × 250 μm². Experimental results show a sensitivity of -25 dBm (-22 dBm without transformer) at 1.3 GHz.

Keywords

CMOS integrated circuits; energy harvesting; low-power electronics; rectifiers; transformer magnetic circuits; CMOS process; frequency 1.3 GHz; front-end transformer; fully integrated energy harvesting circuit; radio-frequency electromagnetic waves; size 130 nm; transformer matching; Bonding; Energy harvesting; Impedance; Integrated circuit modeling; Radio frequency; Sensitivity; Transistors; Energy Harvesting, Radio Frequency (RF); Energy harvesting; Low-power circuits; Transformer; low-power circuits; radio frequency (RF); transformer;

fLanguage

English

Journal_Title

Circuits and Systems II: Express Briefs, IEEE Transactions on

Publisher

ieee

ISSN

1549-7747

Type

jour

DOI

10.1109/TCSII.2014.2387514

Filename

7001179