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Original Articles

Cut-off and Bandwidth Characteristics of Inhomogeneous Rectangular Waveguide with Two Double Ridges

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Pages 377-382 | Received 22 Apr 1985, Published online: 02 Jun 2015
 

Abstract

The dispersion relation of the hybrid modes of a rectangular waveguide with two arbitrarily placed asymmetric double ridges and the five gap and trough regions filled with dielectrics of different permittivities has been determined using the Ritz-Galerkin technique. At cut-off the general characteristic equation splits into two decoupled eigenvalue equations the solutions of which yield the H- and E-type cut-off wavelengths. Some typical numerical data on the cut-off wavelength and bandwidth of the dominant hybrid modes of nine different symmetric inhomogeneous ridged structures loaded with one dielectric are presented to illustrate their characteristics. The dispersion characteristics of a particular configuration, similar to fin-lines with thick fins, are also determined and compared with the published data.

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