Title :
A contour-based approach to the multimode network representation of waveguide transitions
Author :
Schroeder, Werner L. ; Guglielmi, Marco
Author_Institution :
Dept. of Electr. Eng., Duisburg Univ., Germany
fDate :
4/1/1998 12:00:00 AM
Abstract :
A flexible and efficient numerical method is presented by which the multimode network representation (MMNR) of the abrupt transition between a standard waveguide and a waveguide of arbitrary cross section can be established without reference to the cross-sectional fields. The approach combines the boundary integral-equation method (BIEM) with contour integral expressions for the coupling coefficients, and a novel highly efficient scheme to express modal normalization constants in terms of coupling coefficients and eigenvalues. Application is demonstrated for a variety of multiridge circular waveguide (MRCW) configurations and transitions between MRCW and circular waveguide (CW). Comparison is made against most published results for this problem
Keywords :
boundary integral equations; circular waveguides; eigenvalues and eigenfunctions; ridge waveguides; waveguide theory; boundary integral equation method; circular waveguide; contour-based approach; coupling coefficient; eigenvalue; modal normalization constant; multimode network representation; multiridge circular waveguide; numerical method; waveguide transition; Cutoff frequency; Eigenvalues and eigenfunctions; Fasteners; Filters; Helium; Integral equations; Mode matching methods; Space technology; Waveguide discontinuities; Waveguide transitions;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
