SIMULATION OF 100-300-GHZ SOLID-STATE HARMONIC SOURCES

Accurate and efficient simulations of the large-signal time-dependent characteristics of second-harmonic Transferred Electron Oscillators (T EO's) and Heterostructure Barrier Varactor (HBV) frequency triplers ha ve been obtained, This is accomplished by using a novel and efficient harmonic-balance circuit analysis technique which facilitates the inte gration of physics-based hydrodynamic device simulators, The integrate d hydrodynamic device/harmonic-balance circuit simulators allow TEO an d HBV circuits to be co-designed from both a device and a circuit poin t of view, Comparisons have been made with published experimental data for both TEO's and HBV's, For TEO's, excellent correlation has been o btained at 140 GHz and 188 GHz in second-harmonic operation. Excellent correlation has also been obtained for HBV frequency triplers operati ng near 200 GHz, For HBV's, both a lumped quasi-static equivalent circ uit model and the hydrodynamic device simulator have been linked to th e harmonic-balance circuit simulator. This comparison illustrates the importance of representing active devices with physics-based numerical device models rather than analytical device models.