Moment method analysis of a slot coupled junction between dissimilar rectangular waveguides

摘要

This paper presents a moment method analysis of a rectangular slot coupled transition between two dissimilar rectangular waveguides. The effect of the finite thickness of the metallic wall, in which the slot is milled, is taken into account by considering the coupling slot as a small section of a rectangular waveguide. The reflection coefficient and VSWR are evaluated for a transition between WR-90 and WR-112 rectangular waveguides. A comparison between the theoretical and experimental results on the variations of the magnitude and phase of the reflection coefficient is presented for the limiting case when the two waveguides are identical.