Electromagnetic wave scattering by quasi-homogeneous obstacles

N. L. Tsitsas, C. A. Valagiannopoulos

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this work we investigate the electromagnetic wave scattering phenomena by quasi-homogeneous obstacles, namely obstacles with wavenumber functions not exhibiting large variations from an average value $\bar k$. First, we express the field coefficients by means of a T-matrix method for the corresponding piecewise-homogeneous scatterer and then perform the best linear approximation by differentials to express these coefficients as linear combinations of the distances of the wavenumber samples from k. Moreover, the total far-field pattern of the quasi-homogeneous scatterer is decomposed into that of the respective homogeneous scatterer with wavenumber k plus the perturbation far-field pattern, depending exclusively on the wavenumber's deviations from k. Numerical results are presented concerning (i) the far-field patterns, computed by the proposed technique and the T-matrix method, (ii) the variations of the perturbation far-field pattern, and (iii) the prediction of each layer's contribution to the far-field.

Original languageEnglish
Title of host publicationProceedings of the 9th International Workshop on Mathematical Methods in Scattering Theory and Biomedical Engineering
Subtitle of host publicationAdvanced Topics in Scattering and Biomedical Engineering
PublisherWorld Scientific Publishing Co. Pte Ltd
Pages169-176
Number of pages8
ISBN (Print)9814322024, 9789814322027
DOIs
Publication statusPublished - Jan 1 2010
Event2009 9th International Workshop on Mathematical Methods in Scattering Theory and Biomedical Engineering - Patras, Greece
Duration: Oct 9 2009Oct 11 2009

Publication series

NameProceedings of the 9th International Workshop on Mathematical Methods in Scattering Theory and Biomedical Engineering: Advanced Topics in Scattering and Biomedical Engineering

Other

Other2009 9th International Workshop on Mathematical Methods in Scattering Theory and Biomedical Engineering
CountryGreece
CityPatras
Period10/9/0910/11/09

ASJC Scopus subject areas

  • Biomedical Engineering
  • Applied Mathematics

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  • Cite this

    Tsitsas, N. L., & Valagiannopoulos, C. A. (2010). Electromagnetic wave scattering by quasi-homogeneous obstacles. In Proceedings of the 9th International Workshop on Mathematical Methods in Scattering Theory and Biomedical Engineering: Advanced Topics in Scattering and Biomedical Engineering (pp. 169-176). (Proceedings of the 9th International Workshop on Mathematical Methods in Scattering Theory and Biomedical Engineering: Advanced Topics in Scattering and Biomedical Engineering). World Scientific Publishing Co. Pte Ltd. https://doi.org/10.1142/9789814322034_0018