ANALYSIS OF A SLOT-COUPLED T-JUNCTION BETWEEN CIRCULAR-TO-RECTANGULARWAVE-GUIDE

This paper presents a rigorous analysis of a slot-coupled T-junction b etween a primary circular cylindrical waveguide and rectangular wavegu ide, forming the coupled T-arm. The analysis is based on moment-method formulation using full-wave basis functions and Galerkin's technique for testing. Expression for the coupling and reflection coefficients a re found, taking into account the effect of finite wall thickness of t he circular waveguide in which the coupling slot is milled. A comparis on between the theoretical and experimental results on coupling and re turn loss are presented.