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Scattering parameters are the most widely used tools for characterization of the linear microwave circuits. Although they can be physically measured after the implementation of the microwave circuits, accurate calculation of these parameters plays a crucial role in the design process. By using a time domain technique such as finite difference time domain, it is possible to calculate the scattering...
A new method for waveguide scattering problems analysis is proposed. The method is based on field mode expansion in time domain and mode-matching the fields at a scatter (iris). As an example the problem of diffraction of a pulse wave on an iris in a parallel-plate waveguide is solved and compared against FDTD solution. The main idea is in solving FDTD equations for each mode independently in the...
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