Application of fractional-rational approximation in modeling elements of microwave energy transmission systems

The article is devoted to the application of the Cauchy method for the analysis of pole-zero structures in the form of a matched one-dimensional array and a matched-reflective layered structure in a waveguide. This approach confirms the possibility of a very accurate approximation of frequency characteristics, which simplifies calculations when using ultra-wideband signals. The optimized layered structure allows the useful signal to pass and the second harmonic to be reflected for subsequent conversion, which increases theefficiency of energy transmission by microwave means.