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Investigation of forces affecting dust particle alignment in cross polarization

Musa, Abdulwaheed and Camara, Mamadi 3. Fara and Nasr, Saad Osman Bashir (2014) Investigation of forces affecting dust particle alignment in cross polarization. In: Proc. of the International Conference on Computer & Communication Engineering 2014 (ICCCE 2014), 23-25 September, 2014, Kuala Lumpur.

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Abstract

This paper implicitly discusses method of using dual orthogonal polarizations to optimally conserve frequency spectrum. This has, in the recent time, received considerable interest in the field of electromagnetic wave propagation in sand and dust storms. The realization of a dual-polarized system is thus 1imited by degree of cross polar discrimination (XPD) that can be achieved between the two orthogna1 channels. Cross polarization discrimination is a parameter widely used to quantify the effects of polarization interference. Aside from non-sphericity of falling dust particles, dust induced microwave cross polarization has been attributed to tendency of the particles to align in a particular direction. This paper investigates and identifies important forces acting on the alignment which are inputs to the cross polarization discrimination evaluation. The method adopted involves the use of reliable measure of turbulence shear, inertial torque and Brownian motion effects. The result obtained shows the influence of the relevant forces on the alignment of the dust particles. Inertial torque becomes a domineering force for systematic alignment at some particle size range.

Item Type: Conference or Workshop Item (Invited Papers)
Additional Information: 6501/39327
Uncontrolled Keywords: cross polarization; microwave propagation; particle alignment; dust storms; inertial torque; turbulent torque; Brownian force.
Subjects: T Technology > T Technology (General) > T10.5 Communication of technical information
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button): Kulliyyah of Engineering > Department of Electrical and Computer Engineering
Depositing User: Saad O Bashir
Date Deposited: 28 Nov 2014 15:25
Last Modified: 23 Sep 2017 11:56
URI: http://irep.iium.edu.my/id/eprint/39327

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