Dispersion characteristics of strip dielectric waveguides

A simple and accurate dispersion relation is derived for the guided mode of a strip dielectric waveguide. This relation shows explicitly the effect of the width of the waveguide and involves only the solution for a single three-layer slab waveguide. It is found that there always exist a strip waveguide with a specific aspect ratio in which the E/sub mn//sup x/ and E/sub mn//sup y/ modes propagate at the same phase velocity.<
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