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Centered inclined slot coupling between waveguides with coplanar axes
Author(s) -
Tiwari Ashish Kumar,
Poddar D.R.,
Das B.N.
Publication year - 2011
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/mmce.20486
Subject(s) - coupling (piping) , coplanar waveguide , optics , waveguide , equivalent circuit , microwave , scattering , slotted waveguide , aperture (computer memory) , physics , geometry , materials science , mathematics , acoustics , slot antenna , engineering , electrical engineering , radiation pattern , quantum mechanics , voltage , antenna (radio) , metallurgy
The article presents the method of finding the complete equivalent circuit of two waveguides with coplanar axes coupled through a centered inclined slot in the common broad wall. The variational method based on dyadic Green's function is used for finding the parameters of the equivalent circuit. A cosinusoidal aperture field distribution is assumed. Considerable mathematical simplification is resulted from replacing the centered inclined slot by an equivalent magnetic dipole. Coupling slot characteristics are deduced, including resonant length, dominant mode scattering in both the waveguides. Numerical and experimental results for resonant lengths and scattering parameters are presented over a range of tilt angles, frequencies, and waveguide dimensions. These results have significant applications in linear waveguide arrays and coupler design. © 2010 Wiley Periodicals, Inc. Int J RF and Microwave CAE, 2011.