The basic concepts determining electromagnetic shielding

Author:

Vandenbosch Guy A. E.1

Affiliation:

1. Department of Electrical Engineering, Katholieke Universiteit Leuven, Kasteelpark Arenberg 10, 3001 Leuven, Belgium

Abstract

Shielding involves much more than just putting a conductive screen in between an emitting source and a susceptible device. Starting from Maxwell's equations, the concept of electromagnetic shielding is formally explained. The physical working mechanisms behind the two basic forms of shielding, electric field and magnetic field shielding, are given, and the link between them at higher frequencies is clarified. Several aspects, like the effect of gridding or weaving a shield, the effect of the finite size of a shield, and the penetration through the metal of a shield, are discussed based on very simple canonical shielding topologies that can be solved analytically. Although the classical paradigm to explain shielding based on the notions of skin depth and eddy current is not followed, conceptual links with this classical paradigm are explained.

Publisher

American Association of Physics Teachers (AAPT)

Subject

General Physics and Astronomy

Reference17 articles.

1. See for information on many practical forms of shielding, here related to the controversy about electromagnetic fields in our society.

2. Electromagnetic Compatibility Engineering

3. Electromagnetic Shielding

4. Electromagnetic screening by metals

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1. The basic concepts determining electromagnetic shielding;American Journal of Physics;2022-09

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