Investigation of mode coupling due to ohmic wall losses in overmoded uniform and varying-radius circular waveguides by the method of cross sections

Investigation of mode coupling due to ohmic wall losses in overmoded uniform and varying-radius circular waveguides by the method of cross sections

The effect of ohmic wall losses on mode coupling in overmoded varying-radius circular waveguides is investigated. Mode coupling and multimode propagation in uniform lossy-wall circular waveguides is also discussed. The expressions for the coupling coefficients are given by line integrals of the powe...

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Veröffentlicht in:IEEE transactions on microwave theory and techniques 2002-05, Vol.50 (5), p.1361-1369
Hauptverfasser: Shafii, J., Vernon, R.J.
Format: Artikel
Sprache:eng
Schlagworte:
Attenuation
Boundaries
Circular waveguides
Conductors
Couplings
Cross sections
Electric breakdown
Gyrotrons
Integral equations
Joining
Microwaves
Millimeter wave propagation
Millimeter wave technology
Ohmic
Planar waveguides
Propagation losses
Walls
Wave propagation
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Beschreibung
Zusammenfassung:The effect of ohmic wall losses on mode coupling in overmoded varying-radius circular waveguides is investigated. Mode coupling and multimode propagation in uniform lossy-wall circular waveguides is also discussed. The expressions for the coupling coefficients are given by line integrals of the power-normalized fields of the normal modes along the boundary of the waveguide cross section. Numerical results are presented for the case of propagation of an HE/sub 11/-like mode excitation in a uniform smooth lossy-wall circular waveguide.
ISSN:0018-9480
1557-9670
DOI:10.1109/22.999151