Nouvelles méthodes de caractérisation et de modélisation non-linéaire électrothermique des effets de piège dans la technologie HEMT GaN pour l’étude de la stabilité pulse à pulse dans les applications radar

Abstract : The capability of a radar transmitter to ensure clutter rejection depends mainly on its pulse-to-pulse stability, which is affected by many factors such as mechanical, thermal, and electrical effects. However, the P2P stability of a pulsed radar transmitter is linked to that of its power amplifiers, and more specifically on the active device technology. In this context, thiswork presents the analysis of this radar criterion at device level (GaNHEMTtransistor) in the case of a radar burst of RF pulses. A new on-wafer time-domain envelope measurement setup based on a 4-channel THA receiver has been developed to characterize pulse-to-pulse stability and the low-frequency drain current. While this setup was originally developed to characterize the critical specification of pulse-to-pulse stability for radar applications, it demonstrated a great potential for trap modeling in addition to the different characterization techniques of traps (pulsed I-V, low-frequency dispersion of Y22).
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Seifeddine Fakhfakh. Nouvelles méthodes de caractérisation et de modélisation non-linéaire électrothermique des effets de piège dans la technologie HEMT GaN pour l’étude de la stabilité pulse à pulse dans les applications radar. Electronique. Université de Limoges, 2018. Français. ⟨NNT : 2018LIMO0103⟩. ⟨tel-02023049⟩

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