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An Electrothermal Model of High Power HBTs for High Efficiency L/S Band Amplifiers, A. Xiong, R. Sommet et al., European Microwave Integrated Circuits Conference, Oct. 2008

An Electrothermal Model for GaInP/GaAs Power HBTs with Enhanced Convergence Capabilities, O. Jardel, R. Quere, S. Heckmann et al., 1st European Microwave Integrated Circuits Conference, Sept. 2006, pp. 296 - 299

Large Signal Pulsed RF and DC Load Pull Characterization of High Voltage 10W GaAs-GaInP HBTs, T. Gasseling, S. Heckmann, D. Barataud et al., 2003 IEEE MTT-S International Microwave Symposium Digest, vol.3, pp. 1651-1654, June 2003

Characterization and Modelling of bias dependent breakdown and self-heating in GaInP/GaAs power HBT to improve high power amplifier design, S. Heckmann, R. Sommet, J.M. Nebus et al., IEEE Transactions on Microwave Theory and Techniques, vol. 50, issue 12, Dec. 2002 pp. 2811 - 2819