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Conductive coupling is easier to understand because it is dominant at lower frequencies (for example, <10 MHz) and problems can often be solved with proper grounding distribution or filtering. Common impedance coupling (CIC) is defined and calculated with the power distribution return as a primary example. Reducing CIC can summarize as: “we must act on the (Z × I)”, that is reduce impedance Z or reduce current I. Five simple rules are described, based on that principle. Graphs and tables clearly show differences between single point ground and multipoint ground systems and the strengths and weaknesses of both types. A five points-quiz reconcile the CIC issues.

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Conduction Coupling, the First of the Coupling Paths

  • 章节

  • 发表日期：

    2025年

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  • Michel Mardiguian

摘要

Conductive coupling is easier to understand because it is dominant at lower frequencies (for example, <10 MHz) and problems can often be solved with proper grounding distribution or filtering. Common impedance coupling (CIC) is defined and calculated with the power distribution return as a primary example. Reducing CIC can summarize as: “we must act on the (Z × I)”, that is reduce impedance Z or reduce current I. Five simple rules are described, based on that principle. Graphs and tables clearly show differences between single point ground and multipoint ground systems and the strengths and weaknesses of both types. A five points-quiz reconcile the CIC issues.