Performance analysis of multiply connected thin shields

Issue title: Selected Papers from the 14th International Symposium on Applied Electromagnetics and Mechanics (ISEM 2009), Part I

Article type: Research Article

Authors: Ciric, Ioan R.^a | Hantila, Florea I.^{b; *} | Moraru, Augustin^b | Maricaru, Mihai^b

Affiliations: [a] Department of Electrical and Computer Engineering, The University of Manitoba, Winnipeg, MB R3T 5V6, Canada | [b] Department of Electrical Engineering, Politehnica University of Bucharest, Spl. Independentei 313, Bucharest, 060042, Romania

Correspondence: [*] Corresponding author: Florea Ioan Hantila, Politehnica University of Bucharest, Spl. Independentei 313, EB224, Bucharest, 060042, Romania. Tel.: +40 744 523 359; Fax: +40 21 402 91 44; E-mail: [email protected]

Abstract: By performing holes in a thin electromagnetic shield, its weight and price can be reduced, without practically changing the shielding efficiency for certain geometries and frequencies. A new method for solving the integral equation of the surface current density in thin shields with holes is applied, where the current density is represented by a linear combination of specialized surface vector functions associated with the interior nodes of the discretization mesh and with the sets of nodes on each hole contour. A Galerkin technique is applied to determine the scalar coefficients of these functions. The magnetic flux density in the shielding zone is obtained accurately, in terms of exact analytical formulas, from these vector functions.

Keywords: Shielding efficiency, current sheet integral equations, thin shields with holes

DOI: 10.3233/JAE-2010-1122

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 33, no. 1-2, pp. 271-278, 2010