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Study of TE and TM modes in waveguides of arbitrary cross-section using an FD-TD formulation

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2 Author(s)
Navarro, E.A. ; Dept. of Appl. Phys., Valencia Univ., Spain ; Such, V.

The authors describe the application of the finite-difference method in the time domain for obtaining the cutoff frequencies of TE and TM modes in waveguides of arbitrary cross-section. Maxwell's equations are discretised in a two-dimensional space. The application of the discrete Fourier transform also provides the spatial distribution of the modes in the cross-section of the waveguide. The method is validated against rectangular and a circular waveguides, each with a known cutoff spectrum. Finally, the method is applied to determine cutoff wavelengths and modal field distributions in a square coaxial waveguide

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Microwaves, Antennas and Propagation, IEE Proceedings H  (Volume:139 ,  Issue: 6 )