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Theses

Modélisation et conception de circuits de réception complexes pour la transmission d'énergie sans fil à 2.45 GHz

Abstract : The work presented in this thesis is included within the theme of wireless power transmission, applied to wireless powering of sensors, sensor nodes and actuators with low consumption. This study deals with the design, optimization, fabrication and experimental characterization of compact, low cost and efficient Rectennas (Rectifying antennas).A global analysis tool, based on the Finite Difference Time Domain method (FDTD),has been developed and used to predict with a good precision the DC output of studied rectennas. The packaged Schottky diode has been rigorously modeled, taking into account the parasitic elements, and included in the iterative FDTD calculation.Three new rectennas, with microstrip technology, have been developed and measured.They operate at 2.45 GHz and they don’t need neither input HF filter nor via hole connections. Efficiencies more than 80 % have been measured when the power density is 0.21mW/cm² (E = 28 V/m). An output DC voltage of about 3.1 V has been measured with anoptimal load of 1.05 k_, when the power density is equal to 0.31mW/cm² (34 V/m).Rectenna arrays, with series and parallel interconnections, have been developed and measured. Output DC voltages and powers have been doubled and quadrupled using two andfour rectenna elements, respectively.
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Submitted on : Wednesday, February 9, 2011 - 1:59:06 PM
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  • HAL Id : tel-00564596, version 1

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Hakim Takhedmit. Modélisation et conception de circuits de réception complexes pour la transmission d'énergie sans fil à 2.45 GHz. Autre. Ecole Centrale de Lyon, 2010. Français. ⟨NNT : 2010ECDL0025⟩. ⟨tel-00564596⟩

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