The Investigation of Circular Dielectric Filled Waveguide with Metal Ridges

This paper provides information about the results of investigation of circular dielectric filled waveguide with metal ridges. One of the most important characteristics of waveguide structures are cutoff wave numbers. In our research we focus on cutoff wave numbers of the dominant mode and higher order modes. So, the method which is applied is the partial regions method. The researched structure has metal ridges and corners so a singularity of electromagnetic fields is considered by adding special functions in equations. Equations for electromagnetic field components are presented. Besides cutoff wave numbers the pictures of isoline of electromagnetic field are obtained. These results can be useful to create filters, diplexers and others devices based on circular dielectric filled waveguide with metal ridges. The computed results are found for different number of series terms in expansion and different numbers of approximating functions, so it allows to estimate the accuracy of the algorithm.