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http://dx.doi.org/10.4283/JKMS.2011.21.3.099

3-D Magnetic Field Simulation of Open-ended Cylinder Type Magnetic Shield  

Shin, Kwang-Ho (Department of Information & Communication Engineering, Kyungsung University)
Abstract
In this study, we have performed systematical FEM analysis for design of open-ended 3-layer magnetic shield. For the simulation to calculated shielding factors, the relative permeability was varied in the range of $2{\times}10^3\sim1{\times}10^5$, and the length of the magnetic cylinders and length difference between layers were changed. We found that the shielding factor of -60 dB were obtained with the relative permeability of over 20000 and the lengths of magnetic layers of 40 cm, 45 cm and 50 cm, and the uniform magnetic field could be obtained in the range of $10cm{\times}10cm-\phi$.
Keywords
magnetic shield; finite element analysis; multi-layered cylinder;
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