RADIATIVE TRANSFER MODEL (RTM) FOR LOSS EVALUATION IN MICROWAVE COMMUNICATION LINK UNDER SAND AND DUST STORM CONDITION

摘要

In this paper an attempt has been made for evaluation of Scattering, Absorption and Extinction coefficient of dust particles in the microwave communication link using Radiative Transfer Model (RTM). The entire length of microwave link has been considered as number of layer of sand, silt and clay particles in cascade form. The shape of particle considered as spheroid and non-spheroid in character. The expression for Scattering, Absorption and Extinction coefficients of sand, silt and clay particles have been developed both for vertical and horizontal polarization. Scattering, Absorption and Extinction coefficient depends on frequency, angle of incidence, visibility, permittivity, permeability. It is found that that non-spheroid dust particle passes higher value of attenuation than spheroid dust particle. Clay particle passes large dielectric constant in comparison to sand and silt particle. Attenuation in clay particles passes higher value than sand, and silt.