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ARTICLES

Shielding Formulas for Near Fields

Extremely low frequency formulas for magnetic shielding effectiveness
TECHNICAL NOTES Shielding Formulas for Near Fields R.C. Hansen Consulting Engineer Tarzana, CA This article reviews extremely low frequency (ELF) formulas for magnetic shielding effectiveness. In particular, the simple three-term Schelkunoff formula is accurate at all frequencies if the proper near-field, or far-field, wave impedance is used. E lectromagnetic...
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