Band-pass filters on transverse shifts of double-ridge waveguides realized by SIW-technology

A new type of waveguide elements – SIW (Substrate Integrated Waveguide) – for implementation in multilayer integrated circuits is described. The possibilities of conversion to waveguides of complex cross section realized by SIW are shown. As an example the realization band-pass filter on transverse shifts of double-ridge waveguides in classical all-metal and in SIW implementations is discussed. The calculation of electrodynamic characteristics of classical double-ridge waveguide is provided by the method of partial regions including field singularity at the edge. The conversion from classical waveguides to SIW is performed by approximation formulas.