A nested complex source beam method for EM scattering analysis

A nested complex source beam (NCSB) method based on the method of moment (MoM) solution is proposed for electromagnetic scattering analysis. In the finest level, the far field contribution of each basis function is expressed with that of complex source beams (CSBs) distributed evenly on the equivalent surface for every group. Furthermore, the far-field coupling of CSBs in the son level group also can be represented by that of CSBs in the father level group. With the operation above, a nested multilevel structure for the CSB method is obtained. Numerical results demonstrate the efficiency of the proposed method.