Abstract
The Green’s function method (GFM) is used to describe the effects of a statistical roughness on the propagation of electromagnetic fields in a circular waveguide. The GFM method, applied to a scalar Helmholtz equation with perturbed boundary conditions, allows us to treat multiple scattering of the field. Theoretical results for azimuthal and longitudinal roughness are reported, and the phase velocity of the field is discussed in both cases.
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