Rectangular Waveguide containing Uniaxial Anisotropic Moving Warm Plasma

Abstract

In this paper the propagation of electromagnetic waves through a rectangular waveguide filled with a plasma medium in the presence of an external magnetic field is investigated. The plasma is assumed to be lossless, compressible and moving with a constant velocity with respect to the guide walls. The dispersion relations and the field components are derived for Transverse Electric (TE) and Transverse Magnetic (TM) modes by making use of Maxwell's equations, appropriate boundary conditions, Lorentz transformations and the principle of phase invariance. It is found that the dispersion relation as well as the cutoff frequency for TE modes are found to be unaffected by the compressible property of the plasma whereas for TM modes it is dependent upon the acoustic and drift velocity. The cutoff frequency is found to shift towards the high frequency side. For warm plasma moving non-relativistically under the influence of strong longitudinal magnetic field, electron temperature and the drift do not affect the cutoff frequency.