EFFICIENT FULL-WAVE AUTOMATED DESIGN AND YIELD ANALYSIS OF WAVE-GUIDECOMPONENTS

Automated circuit design of microwave networks relies on using efficie nt CAD tools: for waveguide technology, modal analysis has emerged as the most useful electromagnetic simulator, either in the generalized s cattering matrix (GSM) formulation or in the generalized admittance ma trix (GAM) form. It is demonstrated that, when considering the solutio n of an entire waveguide component, the GAM approach requires half of the unknowns at the infernal ports than the GSM representation, hence allowing considerable gain in efficiency. Process-oriented yield analy sis of microwave components is generally effected by considering a lar ge number of statistically generated geometrical dimensions and by per forming a complete full-wave analysis for each set of dimensions. It i s shown that, by using the adjoint network method, it is possible to p erform a yield analysis with just one complete analysis of the entire component, hence considerably reducing the numerical effort of yield a nalysis. (C) 1998 John Wiley & Sons, Inc.