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

被引：1
|
作者：
Ngoc Quang Ta [1 ]
Shirai, Hiroshi [1 ]
机构：
[1] Chuo Univ, Grad Sch Sci & Engn, Tokyo 1128551, Japan
来源：
IEICE TRANSACTIONS ON ELECTRONICS | 2022年 / E105C卷 / 04期
关键词：
physical optics; PO; asymptotic approximation; circular conducting cylinder; steepest descent path; uniform asymptotic expansion; numerical integration; GEOMETRICAL-THEORY; DIFFRACTION;
D O I：
10.1587/transele.2021REP0001
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
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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页码：128 / 136
页数：9
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