Modeling discontinuities in dielectric-loaded waveguides
- 1 December 1988
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Microwave Theory and Techniques
- Vol. 36 (12), 1804-1810
- https://doi.org/10.1109/22.17416
Abstract
The mode-matching technique is applied to model step discontinuities in dielectric-loaded cylindrical waveguides excited by hybrid modes. It is shown that the field solution obtained by mode matching does not converge unless complex modes are included in the field expansion. If the structure parameters and operating frequency allow for the existence of complex modes, then the purely propagating and evanescent mode fields do not form a complete set unless complemented by the complex mode field. Numerical results that clearly illustrate the role of the complex mode fields in the modeling of step discontinuities are presented. Examples illustrating the representation of the step discontinuities by a multiport scattering matrix are included.Keywords
This publication has 6 references indexed in Scilit:
- Complex modes in dielectric loaded waveguidesPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2005
- Complex and Backward-Wave Modes in Inhomogeneously and Anisotropically Filled WaveguidesIEEE Transactions on Microwave Theory and Techniques, 1987
- The Effect of Complex Modes at Finline DiscontinuitiesIEEE Transactions on Microwave Theory and Techniques, 1986
- Modes in Dielectric-Loaded Waveguides and ResonatorsIEEE Transactions on Microwave Theory and Techniques, 1983
- Evanescent and propagating modes of dielectric-loaded circular waveguideProceedings of the Institution of Electrical Engineers, 1964
- Guided complex waves. Part 1: Fields at an interfaceProceedings of the Institution of Electrical Engineers, 1963