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EMC shielding is the mechanical fix for an electrical problem

07 October 2019

EMC is the acronym for electromagnetic compatibility which means the ability of equipment to function satisfactorily in its electromagnetic environment without introducing intolerable electromagnetic disturbances to other equipment in that environment.

Electronics engineers are very familiar with this and will consider in their design good board layout, filtering, grounding, signal integrity etc. to try resolving EMI at its source. However, shielding of the enclosure is just as important and solves the problem of radiated emissions and susceptibility. Shielding is a mechanical fix for an electrical problem and the enclosure design engineer should be aware of the types of gaskets available and their different attributes and ensure there is enough land area on the enclosure seams, doors etc. to fit the gasket. 

There are 4 main gasket types available:

• Knitted wire mesh
• Electrically conductive elastomers
• Conductive fabric over foam
• Metal: Beryllium copper/stainless steel

Read the full article in the October issue of DPA.



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