Wissam Saabe, Application Engineer at AMCAD Engineering, discusses transistor behavioral modeling for circuit design, and circuit behavioral modeling for system design. Wissam starts by introducing the Enhanced Polyharmonic Distortion (EPHD) model and the measurements required to extract the model, and shows a first-pass design success of a Doherty PA circuit using EPHD behavioral models. Wissam goes on to introduce a turnkey system-level behavioral modeler, VISION, and demonstrates model extraction and simulation and an active antenna. Finally, Wissam speaks about modeling digital pre-distortion at the system-level.