%0 Conference Proceedings %T Time-Domain Envelope Measurements and Simulations of Pulse-to-Pulse Stability in Microwave Power Amplifiers %+ C2S2 (XLIM-C2S2) %+ XLIM (XLIM) %+ Advanced Studises %+ Thales Air Systems %A Delprato, Julien %A Barataud, Denis %A Campovecchio, Michel %A Neveux, Guillaume %A Tolant, Clément %A Eudeline, Philippe %< avec comité de lecture %( IEEE MTT-S International Microwave Symposium (IMS) on Microwave Theory and Techniques %B IEEE MTT-S International Microwave Symposium (IMS) on Microwave Theory and Techniques %C Tampa, FL, United States %P pp. 1-4 %8 2014-06 %D 2014 %R 10.1109/MWSYM.2014.6848335 %Z Engineering Sciences [physics]/ElectronicsConference papers %X his paper presents a new measurement system based on heterodyne receiver to characterize the impact of irregular pulsed signals on the pulse-to-pulse (P2P) stability of microwave power amplifiers. The aim of this work is to provide a way of identifying the key design parameters and specifications of power amplifiers, such as thermal management, which have a critical impact on P2P stability. This paper is focused on the impact of thermal effects by applying a worst-case radar waveform that integrates a long silence (i.e. off-time) between each sequence of periodic bursts of pulses. Time-domain envelope measurements and simulations of P2P stability are compared for a 10W S-band GaN HEMT amplifier, with particular regard to thermal time constants of the nonlinear electro-thermal model. %G English %L hal-01066781 %U https://unilim.hal.science/hal-01066781 %~ UNILIM %~ CNRS %~ XLIM %~ XLIM-C2S2