New simple procedure for the computation of the multimode admittance matrix of arbitrary waveguide junctions

A simple method is described for the evaluation of the multimode network representation in terms of admittance parameters. Essentially, this method starts from the wanted final results, the equivalent network representation, in order to obtain an analytic expression for the evaluation of the admittance matrix elements. The procedure is based on general network theory and is equivalent to ideally measuring directly the value of the admittance elements.