TY - JOUR A1 - Rudolph, Matthias A1 - Dörner, Ralf A1 - Heymann, Peter T1 - Multiharmonic Generators for Relative Phase Calibration of Nonlinear Network Analyzers Y1 - 2001 ER - TY - JOUR A1 - Rudolph, Matthias A1 - Dörner, Ralf A1 - Klapproth, L. A1 - Heymann, Peter T1 - An HBT Noise Model Valid up to Transit Frequency Y1 - 1999 ER - TY - JOUR A1 - Rudolph, Matthias A1 - Dörner, Ralf A1 - Heymann, Peter T1 - Harmonic Tuning of Power Transistors by Active Load-Pull Measurement Y1 - 2000 ER - TY - JOUR A1 - Rudolph, Matthias A1 - Dörner, Ralf A1 - Heymann, Peter T1 - Direct Extraction of HBT Equivalent Circuit Elements Y1 - 1999 ER -