The computation of electromagnetic scattering from concentric spherical structures

The computation of electromagnetic scattering from concentric spherical structures by means of the rigorously exact Mie series solution is discussed. Significant extension of existing numerical results is shown possible with a conventional program capable of handling problems involving 25 layers. Some aspects of the computation are briefly discussed indicating areas and techniques for improvement of accuracy. The results of three different problems are presented: a dielectric sphere, a dielectric shell spaced away from a central perfectly conducting sphere and both 5 and 10 discrete layer approximations to the Luneberg and Eaton-Lippmann radially-inhomogeneous spherical structures. The consideration of this computation technique is used to determine the efficacy of novel methods and approximations, and to indicate areas needing improved numerical analysis.