ITD formulation for the currents on a plane angular sector
ITD formulation for the currents on a plane angular sector
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平面角扇区上的电流的 ITD 公式
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
F. Molinet
中科院分区：
文献类型：
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作者：
M. Albani;S. Maci;R. Tiberio;F. Molinet
在几何绕射理论（GTD）及其均匀延拓（UTD）的框架中，由平面角扇形连接的两直边连接处的角点的电磁散射是一个重要问题。同样的正则问题也是有用的，以获得边缘电流，即总衍射机制在面上感应的电流;它们的辐射提供了衍射物理理论（PTD）框架内的场的改善。本文用增量绕射理论导出了平面角扇边缘电流的渐近封闭表达式。这个理论在推导电流的应用已被发现特别有吸引力的情况下，圆形地平面照射的垂直偶极子。这是由于ITD绕射系数满足其相关正则问题的边界条件，因此它们保证了对电流的合理准确预测。
The electromagnetic scattering of a corner at the interconnection of two straight edges joined by a plane angular sector is important in the framework of the geometrical theory of diffraction (GTD) and of its uniform extension (UTD). The same canonical problem is also useful in order to obtain fringe currents, namely the currents that are induced on the face by the total diffraction mechanism; their radiation provides the improvement of the field in the framework of the physical theory of diffraction (PTD). In this paper, asymptotic, closed form expressions of the fringe currents of the plane angular sector are derived by using the incremental theory of diffraction (ITD). The application of this theory in deriving currents has been found particularly attractive for the case of circular ground plane illuminated by a vertical dipole. This is due to the fact that the ITD diffraction coefficients satisfy the boundary conditions of their relevant canonical problem, so that they warrant a reasonably accurate prediction of the currents.