Computationally efficient analysis and design of printed structures

An efficient and rigorous technique, based on the spatial-domain MoM in conjunction with the closed-form Green´s functions, is presented for the analysis and the design of printed geometries in a multilayer environment. The derivation of the closed-form Green´s functions and the analytical evaluation of the MoM matrix entries have alleviated most of the computational burden of the spatial-domain MoM. In addition, with the use of the order recursive Gaussian elimination in the solution of the MoM matrix equation, when the original geometry is modified, the computational efficiency of the spatial-domain MoM is further improved. The assessment of this improvement is demonstrated, in the characterization of a series-fed microstrip array and an inset-fed microstrip antenna.