The application of the equivalent dipole-moment method to electromagnetic scattering of 3D objects

In this paper, a new method called equivalent dipole-moment method for efficient generation of MoM matrices based on equivalent dipoles is presented based on the example of 3D electric object. The current basis function located in source area can be equivalent as an electrical dipole or magnetic dipole, and the matrix elements can be thought as the reaction of fields produced by the equivalent dipoles with the current basis function located in field area. The calculation results show that the proposed method has less computation cost, high accuracy and good adaptability, so that the efficiency of MoM is greatly improved. This work can be extent to arbitrary 3D objects scattering and can provide an effective way to fast compute wide band EM scattering from 3D objects.