Electrodynamic analysis and synthesis of selective devices based on thin diaphragms in ridge waveguides

The novel compact microwave SIW filter based on L-ridged rectangular waveguide

“…Taking into account, orthogonality of eigenvector functions of waveguides coefficients of reflection r ba qp and transmission t ba qp of all modes on junction aperture [5] …”

“…Such multiport device is described by the generalized scattering matrix. The relation between scattering matrix elements and coefficients of reflection r ba qp and transmission t ba qp of waves exciting the irregularity is defined by ratios [5] (r b q -the wave impedance of the line b for qth wave):…”

“…The approaches to design of band-pass filters on single-and doubleridge waveguides are considered in papers. [4,5] The most popular waveguide frequency selective structures are created using transverse irregularities like thin diaphragms or junctions of waveguides of various cross sections. In the filter in this case, the series of volume resonators are connected by segments of waveguides acting as impedance inverters.…”