Conference Agenda

For complete Electromagnetic Compatibility (EMC) studies at PCB and chip levels, we have conceived some demonstrators to precisely characterize and model the more realistic electromagnetic behaviors of circuits at PCB level. We want to keep understandings on effects and contributions on electrical and physical parameters of the different parts of a circuit on PCB. This description is focused on power chips of different semiconductor technologies, that are the main sources of electromagnetic noises in the range of the GHz. This is due to the very high switching times of these components that are nowadays under the thousands of nanoseconds and then can produce high frequency (HF) resonances. Emissions in conducted mode in power PCB are now over the MHz, even with a very low frequency voltage command (kHz). Then, radiated mode is inherently activated, because of the length of the wires and the dimensions of the Power PCB. The nominal design and dimensions, the choice of test points and HF connectors of our PPCB demonstrator are defined for both direct conducted measurements in differential and common mode, and for “equivalent Far-field” radiation measurements in TEM cells. We propose to review EMC/ EMI characterizations available for conducted and radiated evaluations of the emissions at component and circuit level. Then we present the different approaches for constructing an equivalent electrical or numerical model of the PPCB including its environment: packaging, cables, connectors and especially the insertion of probes and antenna, all contributors of the final EMC responses. Some examples of these "EMC Virtual Experiment", on demonstrators and case studies, would show the audience that they can master this methodology for their own EMC understandings and investigations. We illustrate this tutorial by some real uses and applications of this "Virtual Model " in some new and actual scientific and industrial topics: Multiphysics and external temperature impacts, conducted models for aerospace/MEA, couplings in traction chain of trains.