PO with Modified Surface-Normal Vectors for RCS Calculation of Scatterers with Edges and Wedges
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概要
- 論文の詳細を見る
We have proposed a unique and simple modification to the definition of surface-normal vectors in Physical optics (PO). The modified surface-normal vectors are so defined as that the reflection law is satisfied at every point on the surface. The PO with currents defined by this new surface-normal vector has the enhanced accuracy for the edged scatterers to the level of Geometrical Theory of Diffraction (GTD), though it dispenses with the knowledge of high frequency asymptotic techniques. In this paper, firstly, the remarkable simplicity and the high accuracy of the modified PO as applied to the analysis of Radar Cross Section (RCS) is demonstrated for 2 dimensional problems. Noteworthy is that the scattering not only from edge but also from wedge is accurately predicted. This fringe advantage is confirmed asymptotically by comparing the edge and wedge diffraction coefficients of GTD. Finally, the applicability for three dimensional cube is also demonstrated by comparison with experimental data.
- （社）電子情報通信学会の論文
- 2009-01-01
著者
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Ando Makoto
Tokyo Inst. Of Technol. Tokyo Jpn
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OMAKI Nobutaka
Hawaii Center for Advanced Communications (HCAC) University of Hawaii
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SHIJO Tetsu
Toshiba Corporate Research and Development Center
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