Synthesis of Cross-Coupled Resonator Filters Using Optimization Techniques

SolvOpt was a method to solve the local extremum of nonlinear objective function. A single local optimization method based on SolvOpt that synthesizes coupling matrix for cross-coupled microwave filters was presented. In order to solve the global minimum value of cost function, the setting rule of SolvOpt initial value was given, SolvOpt method simplified the process of synthesizing coupling matrix and provides fast convergence and good accuracy to find the final solution, compared hybrid optimization methods. Last, application examples illustrate the excellent performance and the validity of this method.