RT Book, Section T1 Drain temperature dependence on ambient temperature for a cryogenic low noise C-band amplifier A1 Muñoz San Martín, Sagrario A1 Sebastián Franco, José Luis A1 Miranda Pantoja, José Miguel AB A comparison between predicted and measured noise temperatures for cryogenic HEMT amplifiers is presented by using the Pospieszalski's noise model. A good agreement between predicted and measured amplifier's noise performance is obtained both at room and cryogenic temperatures. However, the predicted values overestimate noise temperature in the center part of the measured temperature range (50K - 230K). A parabolic dependence for the drain temperature with ambient temperature is proposed to obtain a better fitting to the experimental results. PB IEEE YR 1997 FD 1997 LK https://hdl.handle.net/20.500.14352/60819 UL https://hdl.handle.net/20.500.14352/60819 LA eng NO European Microwave Conference and Exhibition- Bridging the Gap Between Industry and Academia (EuMC 97)(27.1997, Jerusalén, Israel). DS Docta Complutense RD 14 jun 2026