volume | PIER Journals

Abstract

This paper describes the design, modeling and optimization of an efficient ISM band dual patch rectenna capable of achieving more than 80% RF-to-DC conversion efficiency at low/medium power densities. The circuit is based on a full-wave rectifier, designed and optimized at 2.45 GHz with ADS software and the FDTD algorithm. The performances of the rectenna have been accurately predicted using the full-wave 3D-FDTD method extended to lumped linear and non-linear elements. It exhibits 73% (<V_DC = 1.1 V for R_L= 1.2 kΩ) measured efficiency at a low power density of 14 μW/cm² and 84% (V_DC = 1.94 V) at 43 μW/cm². The differences between the experimental and FDTD simulated efficiencies are less than 3%. The proposed circuit is particularly suitable for low/medium power recycling and power remote supply of wireless sensors, sensor nodes and actuators.

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Dr. Hakim Takhedmit

Dr. Laurent Cirio

Dr. Odile Picon

Prof. Christian Vollaire

Prof. Bruno Allard

Dr. Francois Costa