Hybrid Mode Matching Method for the Efficient Analysis of Metal and Dielectric Rods in H Plane Rectangular Waveguide Devices

摘要

The paper presents a new accurate and efficient technique for the analysis of H-plane single or multiple rods in rectangular waveguides. The new method is based on a mode matching procedure that matches open space and guided modes along a circular boundary that encloses the rods. Since the EM fields around the obstacles are expanded using open space cylindrical modes, a full analytical (and highly efficient) solution can be obtained for dielectric or metallic circular posts. However, this technique can also cope with any arbitrary geometry of the H plane obstacles. In such a case, a numerical method should be used to characterize geometries other than circular in terms of cylindrical modes, and therefore the efficiency would be reduced.