EXCITATION AND PROPAGATION OF A FAST PULSE GUIDED WAVE IN A CIRCULAR DIELECTRIC WAVEGUIDE

M. M. Legenkiy, A. Yu. Butrym

Abstract


It is shown that a pulse signal in a circular dielectric waveguide is partitioned into slow and fast waves. The fast wave propagates
along the dielectric surface with the speed of light in free space and creates a precursor field in the dielectric waveguide in the
form of cones similar to Cherenkov radiation. These cones are re-reflected at the critical angle between the dielectric interfaces
creating a rhombus-shaped wave structure. Long time modeling of this fast wave has been conducted using the Moving Frame
Body of Revolution FDTD technique (BOR-FDTD). The revealed peculiarities of the considered wave structure are discussed.

Full Text:

PDF


Creative Commons License

Licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0) .