Mode basis method for open dielectric waveguides

Abstract

The paper considers generalization of Mode Basis Method on the case of open dielectric waveguides. Spectrum condensing was analyzed on the example of a rectangular waveguide with a dielectric layer when one of the walls is moved to infinity. At this the spectrum is partitioned into discrete (surface waves) and continuous (volume waves) parts. Some properties of this condensing were analyzed. Field expansion on such a nonuniform spectrum was illustrated numerically.