Shielding Design Guidelines

The design stage is much more difficult than the analysis stage, and shielding does not represent an exception for this rule. The reason is manifold: on one hand, the solution of a shielding design problem is generally not unique, and therefore a number of choices have to be made involving very different aspects, often very far from electromagnetics. On the other hand, the concurrence of several coupling paths calls for some wise assumptions in order to simplify the procedure. The uncertainty as to the figures of merit to be selected and met to guarantee the correct operation of the shielding structure is another delicate point that is often by‐passed when compliance with standards is assumed to be sufficient for the achievement of EMC and EMI protection or information security objectives. In this chapter, the main step for a shielding design are described and discussed.