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On the attenuation of transient fields by imperfectly conducting spherical shells

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2 Author(s)
Harrison, C., Jr. ; Sandia Corporation, Albuquerque, NM, USA ; Papas, C.H.

Exact formulas for the electric and magnetic fields at any arbitrary point within a cavity region completely enclosed by a conducting spherical shell of arbitrary size are derived under the assumption that the exciting electromagnetic field is a linearly polarized, monochromatic, plane wave falling on the external surface of the shell. It is shown that the polarization of the electromagnetic field at the center of the cavity is the same as the polarization of the incident wave. From a knowledge of this steady-state solution, the time history of the electromagnetic field at the center of the cavity is calculated for the case where the incident wave is a Gaussian pulse. Numerical information on the effectiveness of the aluminum and copper shields under steady-state and transient conditions is provided for several pulse durations, shield sizes, and wall thicknesses.

Published in:

Antennas and Propagation, IEEE Transactions on  (Volume:13 ,  Issue: 6 )

Date of Publication:

Nov 1965

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