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Local‐mode analysis of continuous transitions in rectangular waveguides
Author(s) -
Fondacci S.,
Mongiardo M.,
Sorrentino R.,
Tarricone L.
Publication year - 1998
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/(sici)1099-047x(199805)8:3<208::aid-mmce4>3.0.co;2-f
Subject(s) - waveguide , transverse plane , microwave , coupling (piping) , optics , section (typography) , plane (geometry) , physics , mode (computer interface) , geometry , materials science , mathematics , computer science , engineering , structural engineering , operating system , quantum mechanics , metallurgy
A local‐modes technique is employed for the rigorous full‐wave computer‐aided analysis of rectangular waveguide components with continuous variations of the transverse cross section along the propagation direction. Fields in the varying waveguide sections are expanded as a sum of the modes of the locally straight waveguide, which, as a result of the longitudinal variations, are coupled to each other; the coupling coefficients depend on the transition geometry and are easily evaluated analytically. The technique offers considerable efficiency and is particularly suitable for the CAD of a large class of waveguide components like tapers, mitered bends, transitions, etc. Examples of applications and comparisons with reference data are illustrated for the case of H‐plane transitions in rectangular waveguides. © 1998 John Wiley & Sons, Inc. Int J RF and Microwave CAE 8: 208–214, 1998.