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Application of the GSD technique to the analysis of slot-coupled waveguides

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4 Author(s)
Omar, A.S. ; Arbeitsbereich Hochfrequenztech., Tech. Univ. Hamburg-Harburg, Germany ; Jostingmeier, A. ; Rieckmann, C. ; Lutgert, S.

The generalized spectral domain (GSD) technique is applied to the analysis of waveguide coupling by axially uniform slots. For a slotted-circular waveguide, cut off wavenumbers of TE and TM modes as well as the corresponding field distributions in the composite waveguide are determined and compared to that obtained by other methods. Plots of the field lines corresponding to the dominant as well as a number of higher order modes are presented. It is shown that considering the H00 modes in the comprising waveguides is necessary. Furthermore, it is demonstrated how the efficiency of the method regarding accuracy and CPU time requirements can considerably be enhanced if infinite sums over eigenmodes which have to be evaluated are replaced by closed-form expressions

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:42 ,  Issue: 11 )