A transverse equivalent network representation for partially dielectric filled single and aysmmetrical double groove guide are presented in this paper. Based on this
the dispersion characteristics of various groove guides is analysed by the microwave network ap-proach. Some comparisons are made between the data obtained by the present method and those by others
and very good agreement has been found. It is verified that by using the present analysis the calculation can be significantly simplified with very high accuracy. Thr-ough design of the broaband directional coupler of groove guide
practical significance of the present method in analysing and designing the groove guide circuit is demonstrated concretely.