The problem of evaluating the shielding effectiveness of a metallic circular disk with finite conductivity and finite thickness against a circular current loop coaxial with the disk is addressed. First the metallic disk is modeled through a new boundary condition which correctly takes into account the thickness of the disk and then the problem is reduced to only one set of dual integral equations which are solved in an exact form by expanding the spectral unknowns in a series of Bessel functions. The proposed formulation is compared with the one based on the Mitzner boundary conditions, showing its accuracy and the capability of reducing the computation time and with the one based on the thin-screen boundary conditions, showing that the latter can lead to erroneous results for sufficiently large thickness-to-skin-depth ratios.

Magnetic shielding of a thick circular conductive disk against a coaxial current loop / Lovat, G.; Araneo, R.; Celozzi, S.; Burghignoli, P.. - (2022), pp. 1-4. ((Intervento presentato al convegno 21st Mediterranean Microwave Symposium, MMS 2021 tenutosi a Pizzo Calabro; Italy [10.1109/MMS55062.2022.9825572].

Magnetic shielding of a thick circular conductive disk against a coaxial current loop

Lovat G.;Araneo R.;Celozzi S.;Burghignoli P.
2022

Abstract

The problem of evaluating the shielding effectiveness of a metallic circular disk with finite conductivity and finite thickness against a circular current loop coaxial with the disk is addressed. First the metallic disk is modeled through a new boundary condition which correctly takes into account the thickness of the disk and then the problem is reduced to only one set of dual integral equations which are solved in an exact form by expanding the spectral unknowns in a series of Bessel functions. The proposed formulation is compared with the one based on the Mitzner boundary conditions, showing its accuracy and the capability of reducing the computation time and with the one based on the thin-screen boundary conditions, showing that the latter can lead to erroneous results for sufficiently large thickness-to-skin-depth ratios.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1655900
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