Electrostatic vibration energy harvester with 2.4-GHz Cockcroft–Walton rectenna start-up

Abstract : In this paper, we propose the design, fabrication and experiments of a macro-scale electrostatic vibration energy harvester (e-VEH), pre-charged wirelessly for the first time with a 2.4-GHz Cockcroft–Walton rectenna. The rectenna is designed and optimized to operate at low power densities and provide high voltage levels: 0.5 V at 0.76 μW/cm 2 and 1 V at 1.53 μW/cm 2. The e-VEH uses a Bennet doubler as a conditioning circuit. Experiments show a 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 available power of 0.4 μW are achieved.
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Hakim Takhedmit, Zied Saddi, Armine Karami, Philippe Basset, Laurent Cirio. Electrostatic vibration energy harvester with 2.4-GHz Cockcroft–Walton rectenna start-up. Comptes Rendus Physique, Elsevier Masson, 2017, 18 (2), pp.98-106. ⟨10.1016/j.crhy.2016.12.001⟩. ⟨hal-01434988⟩

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