Modeling and design of microwave filters employing overmoded empty cylindrical resonators

This paper presents an efficient segmentation of a filter made up of cylindrical multimodal cavities, coupled side by side, that leads to a reduced-complexity model. The latter is built by the combination of the Generalized Reactance Matrices of only two parallel cylindrical waveguides coupled through an aperture which the filter is segmented in. This allows to build the databases necessary for the optimization considering one coupling aperture at a time, thus reducing drastically the computation effort