کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
502013 | 863676 | 2009 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Discretization error due to the identity operator in surface integral equations Discretization error due to the identity operator in surface integral equations](/preview/png/502013.png)
We consider the accuracy of surface integral equations for the solution of scattering and radiation problems in electromagnetics. In numerical solutions, second-kind integral equations involving well-tested identity operators are preferable for efficiency, because they produce diagonally-dominant matrix equations that can be solved easily with iterative methods. However, the existence of the well-tested identity operators leads to inaccurate results, especially when the equations are discretized with low-order basis functions, such as the Rao–Wilton–Glisson functions. By performing a computational experiment based on the nonradiating property of the tangential incident fields on arbitrary surfaces, we show that the discretization error of the identity operator is a major error source that contaminates the accuracy of the second-kind integral equations significantly.
Journal: Computer Physics Communications - Volume 180, Issue 10, October 2009, Pages 1746–1752