Project-based Learning in EMC: Capacitive Coupling

This paper presents a project-based learning (PBL) approach to provide students with an in-depth understanding of the concept of capacitive coupling. Capacitive coupling, among other coupling mechanisms, is of fundamental importance in the analysis of electromagnetic interference (EMI) problems and thus part of electromagnetic compatibility (EMC). It is fundamentally based on the interaction of three-dimensionally distributed alternating electric fields between several conductive structures. For simple geometries, it can be described by integrated quantities voltage, charge and capacitance and be modeled using equivalent circuit diagrams. For complex geometries, numerical simulation tools are typically used. In the project idea presented here, the spatial field distribution is firstly calculated and visualized using 3D EM simulation software. Parametric simulations are then used to develop discrete equivalent circuits that describe the behavior in a simplified way using the integral variables described above. An analytical description based on geometry and material data is compared with the numerical results. Finally, the simulated structure is built by students as a real structure and measured using a vector network analyzer (VNA). The students can compare and validate their results with the data they have collected themselves.Over the course of a semester, students work on this project, which deals with the above-mentioned research topic. They use different methods and learn to compare and evaluate their results. In this way, students develop a deeper understanding of the content as well as critical thinking, collaboration, creativity and communication skills. PBL can thus unleash a stimulating, creative energy in both students and teachers.