一種改進(jìn)的物理光學(xué)迭代法
AN IMPROVED IPO APPROACH
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摘要: 該文使用線積分形式的Kirchhoff公式替代F.Obelleiro(1995)提出的物理光學(xué)迭代(IPO)法中的經(jīng)典Kirchhoff公式,提出了一種改進(jìn)的IPO法。數(shù)值計(jì)算結(jié)果表明,改進(jìn)的IPO法和FObelleiro(1995)的IPO法比較,對(duì)三面角反射器、飛機(jī)座艙等大口面凹型腔體的電磁散射特性分析,在數(shù)值精度相當(dāng)?shù)那闆r下,計(jì)算速度明顯提高。
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關(guān)鍵詞:
- 線積分; Kirchhoff公式; 物理光學(xué)迭代法; 散射
Abstract: The classical Kirchhoff formula in the iterative physical optics (IPO) approach, which was brought forward by Obelleiro(1995), has been replaced by a Kirchhoff formula with line integral form. Based on the new method, an improved IPO approach has been presented. The numerical precision of computation results obtained by the improved IPO approach is almost the same as that of the results computed by IPO approach in Obelleiro s paper(1995). However, the new approach reduces the computation time greatly in analyzing the electroniag- netic scattering of large open-ended concave cavities such as a trihedral corner reflector and an aircraft cockpit, etc. -
F. Olelleiro, et al., An interative physical optics approach for analyzing the electromagnetic scattering by large open-ended cavities, IEEE Trans. on AP, 1995, AP-43(4), 356-361.[2]Gu Changqing, Xu Jinping, Kirchhoff formula with line integral form and its applications, 南京航空航天大學(xué)學(xué)報(bào)(英文版), 1999, 16(2), 183-187.[3]A.C. Polycarpou, et al., Radar cross section of trihedral corner reflectors: theory and experiment.Electromagnetics, 1995, 15(2), 457-484.[4]阮穎錚,等,雷達(dá)截面與隱身技術(shù),北京,國(guó)防工業(yè)出版社,1998,第四章. -
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