About asymptotic approximations in thin waveguides
Nicole Turbe, Louis Ratier (2010)
ESAIM: Mathematical Modelling and Numerical Analysis
Similarity:
We study the propagation of electromagnetic waves in a guide the section of which is a thin annulus. Owing to the presence of a small parameter, explicit approximations of the TM and TE eigenmodes are obtained. The cases of smooth and non smooth boundaries are presented.