Wave Propagation In Circular Waveguide Research Articles

Power flux distribution in chiroplasma‐filled perfect electromagnetic conductor circular waveguides

AbstractTheoretical analysis of the electromagnetic wave propagation in circular waveguides with a chiroplasma core coated with a perfect electromagnetic conductor (PEMC) is presented. The presented formulations and analysis are general for any perfect electric, perfect magnetic, or perfect electromagnetic conductor (PEMC) waveguides filled with any general anisotropic/isotropic metamaterial including plasma. The characteristic equation for the modes in this waveguide is obtained, and the behavior of the dispersion curves and the power flux are examined and evaluated numerically. The results demonstrate that the behavior of the power flux transported in the guide, in magnitude and orientation, is highly determined by the chirality parameter and the plasma and cyclotron frequencies. The mode cutoff frequencies are sensitive to the variations in the filling material and chirality parameters and likewise affected by the variations in the PEMC admittance parameter.

Characteristics of guided modes in chiroplasma circular waveguides in magnetized plasma.

Theoretical analysis of the electromagnetic wave propagation in circular waveguides with a chiroplasma core and a cladding region filled with an anisotropic plasma medium is presented. The cladding region is assumed to be infinitely extended with an external applied magnetic field oriented along the direction of propagation in the waveguide. The characteristic equation for the modes in this waveguide is obtained. The behavior of the energy flux and the dispersion curves are examined and evaluated computationally. The results demonstrate that the behavior of the energy flux transported in the guide in magnitude and orientation is highly affected by the cyclotron and the plasma frequencies in both regions. The modes' cutoff frequencies are sensitive to the variations in the chirality and the plasma frequency of both regions.

Propagation in conducting waveguides having slowly varying cross sections

The present analysis treats the problem of wave propagation in circular waveguides taking into account the effects of both large wall conductivity and slowly varying cross section. The problem is formulated in terms of the Hertz vector for the case of TM waves. The method of multiple scales is used to find a first‐order uniformly valid expansion for the Hertz vector in both the transmission and attenuation regions of the waveguide. The solutions for the perfectly conducting and the circular waveguides are obtained as special cases from the general solution.

Circular waveguides with anisotropic walls

First, the wave propagation in circular waveguides with the boundary condition EΦ = HΦ = 0 is investigated, and the use of these guides for producing circularly polarised waves is described. Secondly, a similar investigation is made for corrugated guides. Their propagation characteristics are compared.