On the Assembly of the Matrix in the Method of Moments and Its Implementation for Perfectly Conducting Bodies

One of the methods for solving the problem of electromagnetic wave diffraction on perfectly conducting bodies and screens—the method of moments—is considered. The basic principles of this method are presented, including reducing the problem to an electric-type integro-differential equation and using Rao–Wilton–Glisson functions as basis functions, with an emphasis on the approximation of integrals over the triangles of the mesh on the conductor’s surface. Based on the considered method of approximating integrals over triangles, an improvement has been made to the previously developed software package, which allows solving diffraction problems on perfectly conducting bodies of complex shapes in the vector case. It is demonstrated that the changes reduced the error of the approximate solution. The results obtained using the developed package are in good agreement with similar calculations using the FEKO software package.