The proceedings of the Institution of Electrical Engineers. Part B, Radio and electronic engineering, including communication engineering · 1955 · 48 citations · 5 references
EngineeringElectrical EngineeringCircuit TheoryMicrowave EngineeringPropagationMicrowave PropagationMicrowave Transmission LinesPropagation ModelingWave PropagationWave Propagation In StructuresWaveguidesCircular WaveguidesMode PropagationMode TheoryRectangular WaveguidesResonant FrequencySurface ImpedanceWaveguide ModesWaveguide Theory
Wave propagation in waveguides whose walls exhibit an arbitrary but small surface impedance is studied.It is shown that, although in the case of circular waveguides all E-and H-modes are stable, in the case of rectangular waveguides all E-modes and higher-order H-modes are unstable, leaving only H modes that can propagate without change of form.General formulae are derived from which the propagation coefficients of imperfect waveguides can be calculated, and for imperfect cavities an expression for the bandwidth and resonant frequency is obtained.
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