Edge Diffraction in NURBS-UTD Method
Edge Diffraction in NURBS-UTD Method
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DOI：
10.1109/tap.2012.2189849
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发表时间：
2012-03
影响因子：
5.7
通讯作者：
Nan Wang;Haobo Yuan;X. Dang;C. Liang
中科院分区：
文献类型：
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作者：
Nan Wang;Haobo Yuan;X. Dang;C. Liang
本文研究了非均匀有理b样条均匀几何衍射理论（NURBS-UTD）方法中的边缘衍射问题。为了解决电大物体的散射问题，分别对射线跟踪、阴影测试和射线场计算等基本方面进行了数值处理。与UTD方法中通过板、圆柱和锥的组合来建模对象相比，NURBS的使用提供了精确的对象建模，并且可以使NURBS-UTD方法直接应用于任意电大的凸表面。数值结果验证了该方法的有效性和改进性。
The edge diffraction in non-uniform rational b-spline uniform geometrical theory of diffraction (NURBS-UTD) method is studied in this communication. Basic aspects like ray-tracing, shadowing test and calculating of ray field are managed through numerical measures respectively in order to solve the scattering problem of electrically large objects. Compared to UTD method where objects are modeled by the combination of boards, cylinders and cones, the use of NURBS provides accurate modeling of objects and can enable NURBS-UTD method to be directly applied to arbitrary electrically large convex surfaces. The computational accuracy can also be improved and numerical results show the validation and the improvement.