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Fundamentals of Steady-State and Transient Electromagnetic Fields in Shielding Enclosures

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1 Author(s)
Franceschetti, G. ; Instituto Electrotecnico Universita, 80125 Naples, Italy

A simplified theory of electromagnetic shielding by enclosures with conductive and/or magnetic wails is presented. The theory is based on a simplified type of boundary condition at the enclosure walls. Theoretical results are compared with exact solutions for steady-state and transient excitation and the approximation turns out to be extremely good in all cases of practical interest. For enclosures of arbitrary shapes, the problem is formulated as a single integral equation in the unknown current in the shield. Numerical solution of the equation is discussed, as well as a possible equivalent lumped-circuit representation.

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Electromagnetic Compatibility, IEEE Transactions on  (Volume:EMC-21 ,  Issue: 4 )