| In this paper, we mainly discuss the simple method to obtain the Green function in spectral domain in layered media, and how to get the spatial Green function based on the Green function in spectral domain by using the method of discrete complex image theory (DCIM). Then, we focus our attention to the method of moment (MOM) in conjunction with the obtained spatial Green function. Namely, we should choose the proper form of the integral equation and expand function. What's more, we discussed how to deal with the singularity arisen from the matrix of impedance. In the last part of the paper, we presented a simple arithmetic for the computation of induced current on the perfect electric column in the presence of the axially planar wave in homogeneous medium.
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