Analysis of H-Plane Discontinuity in a Rectangular Waveguide using Mode Matching Technique

Accurate determination of S-parameters using Mode Matching Technique of H-plane discontinuity is presented. The generalized scattering matrix is obtained from the respective field equations. The H-plane discontinuity operating in X-Band has been considered for a case study. The results that have been obtained using Mode Matching Technique are compared with equivalent circuit approach and 3-D EM simulation software CST MWS and HFSS which are based on Finite Integration Technique and Finite Element Method respectively, based on accuracy and simulation time. The error between Mode Matching Technique and CST MWS is found to be less than 1% with the lowest simulation time.