Electromagnetic Wave Propagation in Rectangular Waveguide Containing an Inhomogeneous Semiconductor Plasma

This paper deals with the study of the propagation characteristics of electromagnetic waves in a rectangular waveguide filled with an inhomogeneous semiconductor plasma medium in which electron density varies linearly in a direction perpendicularto the direction of propagation across the waveguide. Analysis is carried out in terms of longitudinal section electric and longitudinal section magnetic fields. Collision frequency is assumed constant throughout the analysis. From the dispersion relation, an expression for the variation of cutoff frequency with the thickness of the inhomogeneous plasma is derived.