Dimensional synthesis for wideband waveguide filters

Abstract

Broadband waveguide filter designs are widely used for telecommunications, space and terrestrial applications. Fairly accurate design procedures giving equivalent circuit information are well known, but this data needs to be converted into physical dimensions, i.e. waveguide cavity lengths and iris dimensions. The aim of this work is the description of a novel procedure giving dimensions of such filters directly for wide and narrow band applications. The results obtained demonstrate very good equi-ripple performance up to bandwidths of approximately 20% in frequency or 40% in terms of guide wavelength.