DESIGN OF A COMPLETE SOURCE AND VICTIM 3D ELECTROMAGNETIC MODEL FOR MULTILAYER SHIELDING EVALUATION
Résumé
Abstract
Solid-state power sources improve year after year regarding operating frequencies, faster switching times and compactness, which brings its set of disadvantages, notably the increase in radiated electromagnetic interferences (EMI). Most of these sources or systems operate with appropriate low-voltage embedded monitoring devices, including for instance microcontrollers, FPGA, high-speed data converters, clock sources, or any task-specific integrated circuit. Therefore, it becomes major to consider the study of EM immunity of such components or systems during their design, operating near or inside EMI environments. The objective of the study presented here is to develop a complete 3D EM model including a radiating source in the range of intentional electromagnetic interferences (IEMI) from 0.2 to 5 GHz, and a victim, which is the low voltage monitoring system exposed to these radiations. The first approach consisted of the 3D EM co-simulation model validation using CST Microwave Studio and CST Design Studio, by evaluating the E-field radiated from dipolar antennas nearby a victim. In our case, the targeted victim is the clock source part of a high-speed data converter printed circuit board (PCB) developed at our laboratory, which might operate close to pulsed power (PP) sources. With a functional numerical model, we subsequently aimed to characterize the immunity of innovative and very thin multilayer shieldings, which appear to have an interest in the compactness of board-level shielding (BLS) for PCB. Results obtained numerically, in line with analytical models, are observed, discussed, and serve to corroborate the interest in these new shieldings, as well as to validate our complete 3D model for future electromagnetic immunity studies.