Title :
Electromagnetic shielding effect of a set of concentric spheres in an alternating magnetic field
Author :
El-Markabi, M.H.S. ; Freeman, E.M.
Author_Institution :
Imperial College of Science and Technology, Department of Electrical Engineering, London, UK
fDate :
12/1/1979 12:00:00 AM
Abstract :
A nonuniform-transmission-line analogy is employed to simplify the calculation of the axisymmetric electromagnetic field in, and hence the screening effect of, a set of concentric spherical shells excited by a coil carrying current in a circumferential direction only. The use of spherical Bessel functions is shown to be unnecessary. Various special cases are described together with experimental results to support the theory.
Keywords :
electromagnetic fields; magnetic shielding; alternating magnetic field; axisymmetric electromagnetic field; concentric spherical shells; electromagnetic shielding; nonuniform transmission line analogy; screening;
Journal_Title :
Electrical Engineers, Proceedings of the Institution of
DOI :
10.1049/piee.1979.0237
