Abstract
This paper analyses, both theoretically and experimentally, cascaded discontinuities between different size rectangular waveguides containing isotropic dielectric obstacles. A hybrid technique is used, which is based on Schelkunoff's method and the modal matching method. The main advantage of this technique is that the generalized scattering matrix is obtained without using numerical integration techniques. This improves the accuracy of the numerical results and reduces the CPU time. The whole response of a device composed of different cascaded discontinuities is obtained by the usual procedure of joining the scattering matrices. The theoretical and the experimental results agree very well.
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