Opposite power fluxes in certain two-layer isotropic structures
The formation of opposite power fluxes in two-layer circular shielded and open dielectric waveguides is studied theoretically. It is shown that reciprocal power fluxes of partial waves forming the field in two-layer isotropic structures can lead to the appearance of opposite power fluxes. The predominance of the backward (with respect to phase velocity) power flux over the forward flux leads to the formation of a backward wave. Electromagnetic-field transmission through curved interfaces leads to Poynting-vector circulation, which explains the existence of waves with complex wavenumbers in nondissipative systems.
- Pub Date:
- Isotropic Media;
- Power Transmission;
- Flux Quantization;
- Sandwich Structures;
- Electronics and Electrical Engineering