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|Title:||Transmission line model for loss evaluation in sandstorm and duststorm|
|Authors:||Vishwakarma, B R|
Rai, C S
|Abstract:||A theoretical investigation was conducted to examine the propagation characteristics of millimeter waves in sand and dust storms. The storm is considered to have three main constituents, i.e. sand, silt and clay. Reflection coefficient, transmission coefficient and absorption loss were calculated using the impedance concept as a function of frequency and visibility. The entire length of the link is equated to three transmission line sections in cascade, where the sections were characterized by medium parameters of the three constituents of the storm. The propagation parameters are found to depend both on frequency and visibility. Brewster’s phenomenon is clearly observed by the system which is around 75° of angle of incidence. It has been found that for sparsely distributed particles the reflection coefficient is reduced by several orders of magnitude as compared to the case of zero visibility.|
|ISSN:||0975-105X (Online); 0367-8393 (Print)|
|Appears in Collections:||IJRSP Vol.23(3) [June 1994]|
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