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An asymptotic solution of EM backscattering from a conducting sphere coated with a composite material

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2 Author(s)
Shim, J. ; Dept. of Electr. Eng. & Comput. Sci., Pusan Univ. of Foreign Studies, South Korea ; Hyo-Tae Kim

An asymptotic high frequency solution for the electromagnetic (EM) backscattered field produced by a plane wave incident on a perfectly conducting sphere coated with a thin composite material is derived in this paper. For the formulation of the incident and the reflected field the characteristics of the wave transformation and the line integral via the stationary phase method were applied, respectively, and the obtained results are cast in the ordinary ray formats of a geometrical optics field. Based on the Watson transform technique, the diffracted field is also formulated from the residue series solution of the problem and presented in a form suitable for the numerical calculation. The numerical results obtained from the derived asymptotic solution show excellent agreement with those from the rigorous eigenfunction solution.

Published in:

Antennas and Propagation, IEEE Transactions on  (Volume:52 ,  Issue: 6 )

Date of Publication:

June 2004

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