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Wireless sensor node remote supply using a compact stacked rectenna array with voltage multipliers at 2.45 GHz

Published online by Cambridge University Press:  14 October 2019

Hichem Mahfoudi*
Affiliation:
Laboratory of Instrumentation (LINS), Faculty of Electronics and Computers, USTHB, BP.32, EI-Alia, Bab-Ezzouar, Algiers16111, Algeria
Hakim Takhedmit
Affiliation:
Université Paris-Est. ESYCOM (FRE 2028), UPEMLV, ESIEE-Paris, CNAM, Marne-la-Vallee F.77454, France
Mohamed Tellache
Affiliation:
Laboratory of Instrumentation (LINS), Faculty of Electronics and Computers, USTHB, BP.32, EI-Alia, Bab-Ezzouar, Algiers16111, Algeria
Sebastien Boisseau
Affiliation:
CEA, Leti, Minatec Campus 17 rue des Martyrs, Grenoble F-38054, France
*
Author for correspondence: Hichem Mahfoudi, E-mail: hmahfoudi@usthb.dz

Abstract

This paper presents compact rectenna arrays for ambient RF energy harvesting on the 2.45 GHz ISM band. The arrays are based on four and nine series-connected rectenna cells. Each cell is composed of a stacked fractal antenna and an RF-to-dc conversion circuit. The antenna is a compact third Koch fractal shape, fed by a coaxial probe for more compactness. The conversion circuit is a full-wave rectifier with a differential output, each DC polarity is provided by a two-stage Dickson voltage multiplier. Measurement results show a significant increase of the output DC voltage for the one, four, and nine cells rectenna arrays. They provide, for power density of 1.7 μW/cm2, an output DC voltage of 0.9, 2.2, and 4.1 Volts, respectively. The 9 cells rectenna array is used in a remote supply experiment of a temperature and acceleration wireless sensor, where the data are transmitted via a Bluetooth low energy link to a distant smartphone every 1 min.

Type
Research Papers
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2019

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