MODE-MATCHING ANALYSIS OF CIRCULAR-RIDGED WAVE-GUIDE DISCONTINUITIES

This paper describes a mode-matching algorithm for S-parameter computa tion of circular-ridged waveguide (CRW) discontinuities, The ridges ar e shaped Like the cross section of a cone (pie-shaped) with a geometry that can be described in cylindrical coordinates, This idea avoids th e use of a mired-coordinate system in the analysis of the electromagne tic fields in the ridged sections, which can, therefore, be expressed in terms of modal functions, The resulting algorithm is fast and accur ate and has been utilized to design and optimize a five-section double -ridge filter and a quadruple-ridge waveguide transformer, The measure d response of the filter is in good agreement with the calculated data .