Moment method solution using parametric geometry

Practical electromagnetic problems are often three-dimensional (3-D) and involve arbitrary geometry. In the case when an object of curvature is of interest, the use of flat facets creates unnecessary artificial discretization in the solution. Recently, many researchers have been investigating the use of curved patches. This paper presents the method of moments (MoM) technique for computing the electromagnetic radiation and scattering from 3-D conducting bodies of general shape. The arbitrary surface is described by dividing it into a number of connected patches which are mathematically described as parametric quadric surfaces. The electric field integral equation (EFIE) is solved by standard MoM technique with specifically designed basic functions for subdomains which now contain surface curvature. Numerical results agree very well with those of existing studies.