Analysis of the Shielding Effectiveness of Several Magnetic Shields

Today with the rapid growth of telecommunications equipment, electronic and developing more and more networks of power, influence of electromagnetic waves on one another has become hot topic discussions. So in this article, this issue and appropriate mechanisms for EMC operations have been presented. First, a source of alternating current (50 Hz) and a clear victim in a certain distance from the source is placed. With this simple model, the effects of electromagnetic radiation from the source to the victim will be investigated and several methods to reduce these effects have been presented. Therefore passive and active shields have been used. In some steps, shielding effectiveness of proposed shields will be compared. . It should be noted that simulations have been done by the finite element method (FEM).





References:
[1] Ludger Klinkenbusch, ÔÇÿOn the shielding effectiveness of enclosures-,
IEEE Transactions on electromagnetic compatibility, Vol. 47, No. 3,
August 2005.
[2] H. Kaden, Wirbelstr¨ome und Schirmung in der Nachrichtentechnik
(Eddy Currents and Shielding in Communications Engineering). Berlin,
Germany: Springer-Verlag, 1959.
[3] IEEE Standard Method for Measuring the Effectiveness of
Electromagnetic Shielding Enclosures (Online). Available: IEEE Std 299-
1997, 1998.
[4] L.-W. Li, M.-S. Leong, P.-s. Kooi, and T.-S. Yeo, "Exact solutions of
electromagnetic fields in both near and far zones radiated by thin circular
loop antennas: A general representation," IEEE Transactions on Antennas
and Propagation, vol. 45, no. 12, pp. 1741-1748, December 1997.
[5] C. Monzon, "A loop antenna in front of a resistive sheet," IEEE
Transactions on Antennas and Propagation, vol. 44, no. 3, pp. 405-412,
March 1996.
[6] Diako Azizi, Ahmad Gholami, Abolfazl Vahedi, ÔÇÿÔÇÿAnalysis of the
deterioration effects of stator insulation on the its electro-thermal
property--, International Journal of Energy and Power Engineering., vol.
2, no. 3, 2009.