A 2.5D FEM analysis of E-plane structures

This paper present a 2.5D FEM analysis of E-plane waveguide structures. A mixed formulation is used and the work is the basis of a more general analysis tool for 3D structures by 2.5D FEM. In order to verify the accuracy of the method, an E-plane low pass filter has been analyzed and the results have been compared with mode-matching and with measurements.