Electrodynamic Analysis and Synthesis of Selective Devices Based on Thin Diaphragms in Ridge Waveguides

摘要

Problems of analysis and synthesis of microwave selective devices are solved in the case when such devices are the bandpass filters based on thin plane transverse metal diaphragms in ridge waveguides. The vector eigenfunctions and cutoff wave numbers of waveguides are calculated with the help of the partial-domain method taking into account the edge singularity of the electromagnetic field. The multimode scattering matrices of a cascade connection of reentrant resonators are calculated with allowance for the interaction of irregularities via higher modes of evanescent H and E waves in a waveguide. The amplitude-frequency and phase characteristics and the dimensions of synthesized bandpass filters are presented for the case of Π and H-waveguides.