Gapacifive posts and diaphragms in a rectangular waveguide are analyzed in this paper by using the method of moments.In this analysis
no restrictions are imposed on the number
shape and arrangement of the posts and diaphragms
therefore the theoretical formulation and the corresponding computer programs are applicable to the analysis of a wide variety of capacifive waveguide elements.Some numerical examples are given and the computed results show a good agreement with the measured and published ones.