Title :
Edge Diffraction in NURBS-UTD Method
Author :
Wang, Nan ; Yuan, Hao-Bo ; Dang, Xiao-Jie ; Liang, Chang-Hong
Author_Institution :
Sch. of Electron. Eng., Xidian Univ., Xi´´an, China
fDate :
5/1/2012 12:00:00 AM
Abstract :
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.
Keywords :
computational complexity; electromagnetic wave scattering; geometrical theory of diffraction; ray tracing; splines (mathematics); NURBS-UTD method; arbitrary electrically large convex surfaces; boards; computational accuracy; cones; cylinders; edge diffraction; electrically large objects; nonuniform rational b-spline uniform geometrical theory of diffraction method; numerical measures; ray field calculation; ray-tracing; scattering problem; shadowing test; Antenna radiation patterns; Computational modeling; Diffraction; Splines (mathematics); Surface reconstruction; Surface topography; Edge diffraction; electrically large problems; non-uniform rational b-spline (NURBS); uniform geometrical theory of diffraction (UTD);
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2012.2189849
