An efficient algorithm for large finite periodic arrays of microstrip patches using sub-entire domain basis functions

In this paper, another efficient spatial-domain MoM solver based on the mixed potential integral equation (MPIE) is proposed for the analysis of scattering from large-scale finite periodic arrays of microstrip patches that employs sub-entire domain (SED) basis functions, which were first introduced for the free space case in W.B. Lu et al.(1991). The required spatial- domain Green´s functions (GFs) are calculated efficiently by the discrete complex- imaging method (DCIM). The accuracy and efficiency of the developed techniques are demonstrated numerically for large finite periodic microstrip patch arrays having a rectangular or non-rectangular configuration.