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Modeling of discontinuities in general coaxial waveguide structures by the FDTD-method

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2 Author(s)
Van Hese, J. ; Lab. of Electromagn. & Acoust., Ghent Univ., Belgium ; De Zutter, D.

The finite-difference time-domain (FDTD) method is used to model generalized coaxial waveguide structures with discontinuities. The cross section of the waveguide consists of a closed outer conductor and one or two inner conductors of arbitrary shape. The cross section can have any number of dielectric materials with losses. The singular field-behavior near sharp edges is explicitly included in the finite-difference scheme. Any kind of discontinuity can be handled: changes in cross-section as well as changes of material parameters. From the time-domain data, frequency-domain data (S-parameters) are obtained using Fourier-transform techniques

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:40 ,  Issue: 3 )