Mode Matching Method for the Analysis of Cascaded Discontinuities in a Rectangular Waveguide

The generalized scattering properties of cascaded H-plane discontinuity in a rectangular waveguide operating in X- band using Mode Matching Technique (MMT) is obtained from the respective field equations for two different junctions. The S-parameters obtained are cascaded to obtain the S-parameters for the whole system. The results obtained using MMT are compared with Equivalent circuit approach and 3-Dimensional (3-D) Electromagnetic (EM) simulation software package, Computer Simulation Technology Microwave Studio (CST-MWS) and High Frequency Structure Simulator (HFSS) which are based on Finite Integration Technique (FIT) and Finite Element Method (FEM) respectively, based on accuracy and simulation time.