Analysis of Periodic Waveguide Excitation with Arbitrary Shaped Corrugation

In this paper a general solution for the electromagnetic field that can be obtained inside arbitrarily shaped corrugated waveguide. The excitation is made spatially periodic at the same period as the corrugation, where the corrugation is made as a truncation in a canonical smooth conducting waveguide, such as planar, rectangular, or circular. Floquet canonical modes in smooth waveguide is used as a basis to expand the field solution inside the corrugated structure.