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The paper presents a new dipole-moment-based approach for formulating MoM-type problems. The method is universal in nature and it applies equally well to PEC and dielectric objects. The dipole moment (DM) formulation neither suffers from the singularity problem associated with the Green's functions, nor does it experience any difficulties at low frequencies, as do the conventional MoM formulations.
In this paper we determine the weights of the spatial harmonics in a periodic structure, with quasi-periodicity along the propagation direction, by detailed analysis of the fields inside the unit-cells. We use both the Pronypsilas method and Fourier transform to extract the spectrum of the fields inside the unit cells along the propagation direction and compare the results obtained by each method...
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