Benchmarks for integral equation solutions of wideband scattering: The spherical cap reflector

S. M. Booker*, P. D. Smith, E. D. Vinogradova, S. S. Vinogradov

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

A new benchmark is introduced for numerical solutions of transient or wideband electromagnetic scattering problems, and is applied to a time-domain integral equation (TDIE) solution scheme. The benchmark is based on a computation of the direct backscatter of a spherical cap reflector. This structure possesses a surface, an edge and a cavity, and fully tests the ability of the TDIE to model the mechanisms involved in scattering from an arbitrary metallic obstacle. A semi-analytic solution is obtained for the direct backscatter of a spherical cap reflector using an approach based on a method of regularization. A comparison is made of the numerical TDIE solutions with those accurately obtained by the semi-analytic regularization method; the TDIE approach is shown to model accurately all of the scattering mechanisms observed.

Original languageEnglish
Pages (from-to)547-554
Number of pages8
JournalAnnual Review of Progress in Applied Computational Electromagnetics
Volume1
Publication statusPublished - 1999
Externally publishedYes

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