RF characterisation and modelling of AlGaAs/GaAs HBT for 1.8 GHz applications A. Cazarré, J. Tasselli, P. Souverain, J. Verdier and A. Marty Eur. Phys. J. AP, 7 3 (1999) 241-246 Published online: 15 September 1999 DOI: 10.1051/epjap:1999218