Some ferrite control components in section of cut-off waveguide

Summary form only given, as follows. A comparison analysis of electromagnetic structures-a section of a constant cross-section finite length cut-off waveguide (CCSCW) and a section of a stepped cross-section cut-off waveguide (SCSCW) is presented. A design algorithm of the mentioned structures has been devised. In the present paper, the results of a solution of the problem of rectangular waveguide coupling through such structures are presented. By using the mode matching technique applied for eigenfields at the waveguide junction boundary, the integral equation set has been converted into a matrix equation. Here a Galerkin variational method, whose solution determines the values of the tangential electric field in the openings, is used. The convergence of the obtained solution to the exact one has been proved. Using such a design approach, the structures tunable by magnetic field: ferrite and ferrite-waveguide resonators in CCSCW and SCSCW are considered. A method is presented for calculating the elements of the scattering matrix, the absorption coefficients, the width of the passband, and the resonant frequency of a system consisting of ferrite and ferrite-waveguide resonators. Analytic relationships are derived and graphical dependencies are obtained, which provide an engineering computation to be performed for various designs of ferrite films. The utilization of compound ferrite dielectric plates for the linearization of the field frequency characteristic is shown