Application of hybrid approach to the analysis of resonators loaded with axially symmetrical posts

In this paper a new hybrid method is applied to the analysis of circular cavity resonators loaded with arbitrary configuration of axially-symmetrical posts. The method is based on a combination of finite difference frequency domain method and mode matching technique. In our approach each scatterer is treated as an effective circular cylinder represented by impedance matrix defined in its local coordinate system. In order to obtain the scattering parameters of an arbitrary configuration of objects in global coordinate system an analytical iterative scattering procedure (ISP) is utilized. The proposed technique is applied to determine the resonant frequencies of three different configurations of resonators. The validity of the proposed approach is verified with the analytical approach and commercial software.