Computer Aided Design of Junction Circulators

A computer-aided method for designing stripline and microstrip circulators is described. The method may be used to design circulator and optimize its parameters over given frequency bandwidth. Optimization is realized using the error function determined by eigenvalues of scattering matrix characterizing the ferrite junction. The error function is minimalized using the optimization routine which is based on the Hook-Jeeves method /direct search method/. Using this method a good agreement between theoretical and experimental results may be achieved.