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Caractérisations et évolutions des structures de collecte d’énergie RF sur substrats Si et SOI : application à la gestion d’énergie des systèmes microwatts

Abstract : Advances in microelectronics and integrated technologies have allowed the evolution and growth of the world of nomad connected objects. However, these wireless devices require power and involve notions of maintenance, access and autonomy. Thus, with the aim of contributing to making these devices totally autonomous, this thesis proposes the study of a circuit participating in the supply of these connected objects using integrated technologies and RF Energy Harvesting at 2.45 GHz. We will study and compare two integrated technologies: a more recent one, the FDSOI 28 nm and the other more known and standard, the BULK 350 nm. To achieve a power supply function, we will combine an RF to DC energy rectifier circuit with a voltage boost circuit known as a charge pump. The use of FDSOI technology will allow us to use the advantage of substrate biasing, allowing additional gain in voltage rectification performance. This will allow us to respond to the problem: do the new integrated technologies make it possible to create sufficiently high-performance circuits toparticipate in the supply of wireless sensors thanks to RF Energy Harvesting? Firstly, our simulation work shows that the FDSOI technology thanks to the polarization of the substrate makes it possible to obtain better threshold voltages for its transistors and thus increase the voltage produced in rectification (transistor mounted as a diode). Second, we dimensioned our circuits using a method of parametric analysis. Finally, after taking into account the parasites resulting from post-layout simulations, we produced two sets of chips in each technology. Theresults of the simulations and measurements show that it is quite possible to contribute to the power supply of a sensor such as the TelosB in its standby phase by using RF energy recovery and our proposed rectifier circuits. However, the assembly of the different circuits has not been approached in this thesis and constitutes a line of thought for future work as well as the possibility of coupling the RF energy used to supply information.
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Submitted on : Tuesday, October 26, 2021 - 10:45:15 AM
Last modification on : Thursday, October 28, 2021 - 3:58:26 AM

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  • HAL Id : tel-03403431, version 1

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Édouard Rochefeuille. Caractérisations et évolutions des structures de collecte d’énergie RF sur substrats Si et SOI : application à la gestion d’énergie des systèmes microwatts. Micro et nanotechnologies/Microélectronique. Université de la Réunion, 2021. Français. ⟨NNT : 2021LARE0014⟩. ⟨tel-03403431⟩

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