Microwave device modeling is the academic discipline concerned with developing mathematical and computational models to simulate the behavior and characteristics of electronic devices operating at microwave frequencies. This field investigates the electrical, electromagnetic, and often thermal properties and interactions within these devices, employing computational tools such as equivalent network simulators and full-wave electromagnetic solvers to represent complex phenomena and interdependencies. Its significance lies in enabling accurate analysis, prediction, design, and optimization of high-performance microwave components and systems, addressing the challenges posed by increasing complexity and stringent performance requirements in high-frequency electronics.