This paper describes a fast and flexible CAD tool for the wideband modeling
of arbitrarily shaped three-dimensional waveguide components. The algorith
m is based on the evaluation of the poles and the residues of the Y-paramet
ers by the "boundary integral-resonant mode expansion" (BI-RME) method. Som
e examples demonstrate the efficiency and flexibility of the method. (C) 20
00 John Wiley & Sons, Inc.