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Electrostatic Vibration Energy Harvester Pre-charged Wirelessly at 2.45 GHz

Abstract : This paper reports the design, fabrication and experiments of an electrostatic vibration harvester (e-VEH), pre-charged wirelessly for the first time by using an electromagnetic waves harvester at 2.4 GHz. The rectenna uses the Cockcroft-Walton voltage doubler rectifier. It is designed and optimized to operate at low power densities and provides high voltage levels: 0.5 V at 0.5 µW/cm² and 0.8 V at 1 µW/cm². The e-VEH uses the Bennet doubler as conditioning circuit. Experiments show 23 V voltage across the transducer terminal when the harvester is excited at 25 Hz by 1.5 g of external acceleration. An accumulated energy of 275 µJ and a maximum power of 0.4 µW are available for the load.
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Zied Saddi, Hakim Takhedmit, Armine Karami, Philippe Basset, Laurent Cirio. Electrostatic Vibration Energy Harvester Pre-charged Wirelessly at 2.45 GHz. Journal of Physics: Conference Series, IOP Publishing, 2016, 773, pp.012111. ⟨10.1088/1742-6596/773/1/012111⟩. ⟨hal-02434810⟩

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