Abstract: It has been shown that the MoM-PO hybrid method is not effective to dealing with the complex coupling effects in a large PO region. In view of this, the multi-regions are divided on the whole object firstly in the paper. Then, the electric-field integral equation(EFIE) and the magnetic-field integral equation (MFIE) are used to different sub-regions. Furthermore, an efficient sub-region iterative current-based method is introduced to solve the different region's current. Therefore, the complex couplings in larger regions are effectively analyzed according to the simple coupling effects among many smaller regions. Finally, two typical numerical examples are given to illustrate the efficiency of the paper's method.

Key words: method of moments, physical optics, hybrid method, iterative method