On the Asymptotic Evaluation of the Physical Optics Approximation for Plane Wave Scattering by Circular Conducting Cylinders

Ngoc Quang TA; Hiroshi SHIRAI

doi:10.1587/transele.2021REP0001

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On the Asymptotic Evaluation of the Physical Optics Approximation for Plane Wave Scattering by Circular Conducting Cylinders

Ngoc Quang TA, Hiroshi SHIRAI

著者情報

キーワード: physical optics, PO, asymptotic approximation, circular conducting cylinder, steepest descent path, uniform asymptotic expansion, numerical integration

ジャーナル認証あり早期公開

論文ID: 2021REP0001

DOI https://doi.org/10.1587/transele.2021REP0001

この記事には本公開記事があります。

The final version of this article is now available: Vol. E105.C (2022), No. 4 pp. 128-136

詳細

抄録

In this paper, the scattering far-field from a circular electric conducting cylinder has been analyzed by physical optics (PO) approximation for both H and E polarizations. The evaluation of radiation integrations due to the PO current is conducted numerically and analytically. While non-uniform and uniform asymptotic solutions have been derived by the saddle point method, a separate approximation has been made for forward scattering direction. Comparisons among our approximation, direct numerical integration and exact solution results yield a good agreement for electrically large cylinders.

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