Title :
Simulation and measurement of low frequency open surface magnetic field shielding
Author :
Brunett, Joseph D. ; Liepa, Valdis V.
Author_Institution :
EECS Dept., Michigan Univ., Ann Arbor, MI
Abstract :
This paper details the simulation and measurement of low frequency (LF) magnetic field shielding by open surface structures. The approach of this paper is to develop equivalent electric sheet impedance boundary conditions for use by LF surface based electric field integral equation (EFIE) solvers. From these sheet impedance forms, a figure of merit is developed to determine the boundary condition applicability. Next, transmitting and receiving coil designs are analyzed and modifications are made to eliminate shield currents in measurement. Finally, simulated and measured magnetic field shielding is compared for electrically small open surface material disks.
Keywords :
coils; computational electromagnetics; electric field integral equations; magnetic shielding; surface electromagnetic waves; EFIE solver; coil design; electric field integral equation; equivalent electric sheet impedance boundary condition; low frequency magnetic field shielding; open surface structure; shield current elimination; Boundary conditions; Coils; Frequency measurement; Integral equations; Magnetic analysis; Magnetic field measurement; Magnetic materials; Magnetic shielding; Surface impedance; Surface structures;
Conference_Titel :
Electromagnetic Compatibility, 2008. EMC 2008. IEEE International Symposium on
Conference_Location :
Detroit, MI
Print_ISBN :
978-1-4244-1699-8
Electronic_ISBN :
978-1-4244-1698-1
DOI :
10.1109/ISEMC.2008.4652110
