11 Myths of EMI/EMC
A series of common myths and misconceptions about Electromagnetic Compatibility (EMC) and electromagnetic interference (EMI) are debunked. Myth #1 challenges the notion that EMI/EMC is "black magic," attributing this perception to a lack of understanding of fundamental electromagnetic principles. Myth #2 addresses the grounding of cable shields, explaining that for high-frequency shielding, grounding at both ends is essential. Myth #3 emphasizes that enclosing equipment in an all-metal enclosure does not guarantee EMC compliance; seams and apertures need careful attention. Myth #4 highlights the differences in shielding effectiveness between conductive coatings and plastics, depending on the type of field involved. Myth #5 corrects the assumption that the impedance of a capacitor or inductor behaves consistently with increasing frequency. Several other myths are dispelled, including those related to power line filters, PCB grounding, ferrite cores, baluns, and filters on PCB I/O signal lines, providing valuable insights into EMC practices.
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