MODELING BALUNS WITH THE METHOD OF MOMENTS

When using the method of moments (MoM) to model large arrays with larg e numbers of balanced feeds, the feed baluns can always be incorporate d into the analysis by combining the multiport admittance matrix for t he array with the admittance matrices of the baluns. This technique is straightforward but requires that the MoM equations be solved for a l arge number of right-hand sides. This paper shows how the effects of p erfect baluns can be incorporated directly into the MoM equations, req uiring only one right-hand side. This technique yields the exact resul ts with a significant savings in computing resources.