NDLI: On the Diffusion of Electromagnetic Waves and Applicability of Diffusion Equation to Multipath Random Media

Content Provider	IEEE Xplore Digital Library
Author	Jie Xu Janaswamy, R.
Copyright Year	1963
Abstract	The diffusion behavior of electromagnetic (EM) waves in two dimensional (2-D) multipath media is studied through integral equation based full wave Monte Carlo simulations. The influences of some physical factors are explored, among which the area density of the embedded obstacles manifests itself to be the most important one in determining wave diffusion. A lossy system starts to behave diffusively when the area density approximately exceeds 5%, and the diffusion equations are generally applicable for predicting power decay. At low densities, the power-distance relation of the waves appears to follow power laws. The sizes and shapes of the obstacles have a secondary effect on the diffusion of waves. Whenever a system contains small objects or objects with reflecting sides, the waves therein are more diffusive and the diffusion equation approximates the reality more accurately. Absorption loss decreases wave diffusion in general, but our results show that the diffusion equation for a system with very lossy but small obstacles can work very well for predicting power decay.
Sponsorship	IEEE Antennas and Propagation Society
Starting Page	1110
Ending Page	1121
Page Count	12
File Size	612512
File Format	PDF
ISSN	0018926X
Volume Number	56
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-04-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Electromagnetic scattering Random media Maxwell equations Particle scattering Integral equations Two dimensional displays Shape Absorption Boltzmann equation Indoor environments transport theory Diffusion Monte Carlo simulation multiple scattering random media
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering

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