Methodology to simulate and model PCB EMC and SI

To meet public needs, the PCB (Printed Circuit Board) design and manufacturing industries are moving towards electronic technology with high-density implementation. Electronics are increasingly required to operate in harsh environments. Like all electrical equipment, PCBs and electronic circuits must systematically meet electromagnetic compatibility (EMC) requirements [E 1 320][E 2 475] . Unlike other areas of engineering, EMC design of PCBs requires a basic understanding of [E 1 302] and knowledge of circuit theory and electromagnetism. Compliance EMC tests are developed using methodologies tailored to electrical equipment and their operating environments [E 1 315] .

However, for all types of equipment, especially PCBs, EMC testing is often costly and time-consuming. To remedy this cost, it is possible to act upstream during the design phase by developing analytical or numerical models of emissions and susceptibilities in radiated and conducted modes. As with experimental tests, there are various types of EMC models. Firstly, there are systemic models, which can be applied to relatively complex circuits. Analytical models of near-field radiation emissions from PCBs can also be considered. Conversely, the influence of EM radiation can also be modeled using analytical coupling functions with PCB elements. Conducted emission and susceptibility models of components are also solutions for equipment manufacturers. For design engineers, all these different models make it possible to predict possible EMC effects before implementation. For PCBs, it is important to point out that it is conceivable to develop techniques to reduce EMC effects, for example by using negative Group Propagation Time (GPT) circuits.

In addition to component EMC models [E 2 475] ,...