Grounding & Shielding: The Essence of EMC Design
The discipline of Electromagnetic Compatibility (EMC) is concerned with the design of Electronic Systems, while minimizing electromagnetic coupling and interference from within the system and between the system to its environment.
The discipline of electromagnetic compatibility covers and requires involvement in a wide range of other fields of engineering, system engineering and electronic engineering, etc.
Meeting the strict EMC standards, as well as ensuring the satisfactory performance of the equipment in its intended electromagnetic environment requires the implementation of technical measures into the system’s design.
The concept of “grounding” is probably among the most important, yet less understood topic of electronic design, often considered as "black magic". Yet – grounding forms an inseparable part of all electronic and electrical designs, from circuit through system up to installation design. Grounding is implemented for EMC and ESD protection, for safety purposes, for lightning and surge protection, etc.
Shielding, on the other hand, is a necessity for avoiding electromagnetic field coupling from and into equipment enclosure. Adequate shielding is necessary to enhance immunity of equipment, and reduce emissions from the equipment enclosure.
Grounding and shielding are two of the essential concepts in EMC design. No design will be acceptable without them being properly implemented.