On simple methods for calculating ELF shielding of infinite planar shields

Simple approximate methods are developed and described for calculating the extremely low-frequency magnetic-shielding effectiveness for single- and double-layer infinite planar shields. In addition, exact expressions are given and "nearly exact" expressions are derived. Each expression has...

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Bibliographic Details
Published in:IEEE transactions on electromagnetic compatibility 2003-08, Vol.45 (3), p.538-547
Main Authors: Olsen, R.G., Istenic, M., Zunko, P.
Format: Article
Language:English
Subjects:
Applied classical electromagnetism
Applied sciences
Approximation
Approximation methods
Electromagnetic compatibility
Electromagnetism
electron and ion optics
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Information, signal and communications theory
Magnetic fields
Magnetic shielding
Magnetostatics
magnetic shielding, magnetic induction, boundary-value problems
Mathematical analysis
Physics
Shielding
Shields
Telecommunications and information theory
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Description
Summary:Simple approximate methods are developed and described for calculating the extremely low-frequency magnetic-shielding effectiveness for single- and double-layer infinite planar shields. In addition, exact expressions are given and "nearly exact" expressions are derived. Each expression has been compared to the exact expression in order to determine the range of parameters over which it is valid. Each approximate expression can be calculated rapidly and has a simple physical interpretation that leads to physical insight into the shielding process.
ISSN:0018-9375
1558-187X
DOI:10.1109/TEMC.2003.815564