ELECTROMAGNETIC SCATTERING COMPUTATION METHODS FOR VERY SMALL PARTICLES | ||
| The International Conference on Mathematics and Engineering Physics | ||
| Article 7, Volume 3, International Conference on Engineering Mathematics and Physics (ICMEP-3), May 2006, Pages 1-6 PDF (250.71 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/icmep.2006.29910 | ||
| Author | ||
| BASHIR O.1, 2 | ||
| 1Faculty of Engineering, Karary Academy of Technolongy,Khartoum,Sudan.+ | ||
| 2Ministry of National Defense, Karary Academy of Technology, College of Eng’g, Electrcal & Computer Dept. | ||
| Abstract | ||
| ABSTRACT An electromagnetic wave propagating through a cloud of very small particles ( say dust/sand ) experiences extinction ( absorption and scattering ) .The size of these particles is normally less than 0.2 mm ( in radius ), much smaller than the microwave wavelength,therefore it is possible to avoid laborious computation by using approximations . Not only are these considerably simpler than existing solutions ( e.g. for the sphere ) but they can often provide useful physical insight into the processes occurring . In this paper we have checked the Rayleigh theory ( Rayleigh scatterer ) against a full solution of Maxwell’s time-varying fields equations through a point matching technique ( PMT ) and the agreement between PMT and Rayleigh approximations for small particles is found to be good . | ||
| Keywords | ||
| Scattering computations; Maxwell’s equations full solution; Rayleigh-scatterer approximation | ||
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