Title :
Study of TE and TM modes in waveguides of arbitrary cross-section using an FD-TD formulation
Author :
Navarro, E.A. ; Such, V.
Author_Institution :
Dept. of Appl. Phys., Valencia Univ., Spain
fDate :
12/1/1992 12:00:00 AM
Abstract :
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
Keywords :
Maxwell equations; circular waveguides; finite difference time-domain analysis; rectangular waveguides; waveguide theory; DFT; FDTD; Maxwell´s equations; TD modes; TM modes; arbitrary cross-section; circular waveguides; cutoff frequencies; cutoff wavelengths; discrete Fourier transform; finite difference time domain; modal field distributions; square coaxial waveguide; waveguides;
Journal_Title :
Microwaves, Antennas and Propagation, IEE Proceedings H
