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Nouvelle architecture d’amplificateur de puissance fonctionnant en commutation

Abstract : Telecommunication systems development is linked to working frequency and bandwidths increasement of future systems on one hand, and the growing place taken by digital electronics in the transmission chains on the other hand. Concerning the second point, the RF power generation in emitters is still implemented in an analog way, but the energy management of the RF power amplifiers is more and more assisted by numeric devices. The appearance of the 'digital technology' in the field of RF power is characterized by the implementation of high speed switching electronic systems like bias modulators for envelope tracking, power digital to analog converters (Power-DAC) or switching mode RF amplifiers (Classe S or D). This thesis work fits in this context, it describes two original switching devices based on GaN HEMT transistors. These elementary switching cells are realized in MMIC technology, they allow switching frequencies up to few hundreds MHz, with voltages reaching 50V, powers about 100W and energy efficiency greater than 80%. These switching cells are then used in various applications: two kinds of bias modulators for envelope tracking system as well as two architectures of class D amplifiers (half-bridge and full-bridge) are analyzed and validated by experimental results.
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Submitted on : Wednesday, March 21, 2018 - 6:17:11 PM
Last modification on : Friday, January 7, 2022 - 3:48:57 AM
Long-term archiving on: : Thursday, September 13, 2018 - 5:23:49 AM


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  • HAL Id : tel-01740302, version 1



Anthony Disserand. Nouvelle architecture d’amplificateur de puissance fonctionnant en commutation. Electronique. Université de Limoges, 2017. Français. ⟨NNT : 2017LIMO0107⟩. ⟨tel-01740302⟩



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