Efficient analysis of metal and dielectric rods in rectangular waveguide with ferrite magnetized transversely

Zahra Bahrami, Asghar Keshtkar, Ayaz Ghorbani and Hector Esteban

Journal of Electromagnetic Waves and Applications, 2020, vol. 34, issue 2, 141-153

Abstract: This paper presents a new analytical method based on mode matching technique for a waveguide full of anisotropic material with rods. It is proved that mode matching technique is applicable for the waveguide with anisotropic materials. The problem is considered as a 2D electromagnetic problem assuming no field variation normal to the waveguide length. Incident and scattered fields from circular cylinder rods in ferrite medium are expanded with cylindrical modes, and the fields in the waveguide ports are expanded using progressive and regressive modal summations. In both regions, extraordinary wave number is considered for the fields. Finally, the hybrid mode matching between guided and cylindrical modes is done by projecting continuity equations in the circular boundary containing the rod. The fast Fourier transform is used to solve the matching in the presented method. It is shown, that the new method runs faster than commercial software packages, with very good accuracy.

Date: 2020
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DOI: 10.1080/09205071.2019.1690589

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