Numerical Analysis of Finite Antennas Over Two-Dimensional Infinite Periodic Structures Using Method of Moments

Two-dimensional periodic structures have been widely applied to phased array antennas, frequency selective surfaces (FSS), radio wave absorbers, or reflectarrays [1–3]. Size of the two-dimensional periodic structures is often much larger than wavelength and they are modeled as infinite periodic arrays via Floquet theorem. It is well-known that numerical analysis of the two-dimensional infinite periodic arrays can be performed efficiently by Floquet theorem because the two-dimensional infinite periodic arrays are reduced to so-called unit cell owing to Floquet theorem.