Wideband Electromagnetic Wave Propagation Modeling In Indoor Environments Using Ray Tracing Method

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Rezaei Khamseh, Amir Mehdi | 2010

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 40918 (05)
University: Sharif University of Technology
Department: Electrical Engineering
Advisor(s): Shishegar, Amir Ahmad
Abstract:
Ray-tracing method is extensively used for wave propagation analysis of indoor and outdoor environment for narrowband systems. The main goal of this research is to extend ray-tracing method for site-specific modeling of wideband electromagnetic propagation. In this thesis, Time-domain reflection and transmission coefficients have been computed for dielectric half-space and dielectric slab with frequency dependent permittivity. First, analytical form of Fresnel reflection coefficient for vertical and parallel polarizations in time-domain have been computed for dispersive half-spaces with lossy, extended Debye, two-pole Debye and multi-pole Debye models. By using these time-domain coefficients, time-domain reflection and transmission coefficients have been computed for dispersive dielectric slabs too. A new method for convolution computation of time-domain signals has been proposed using the exponential expansion. Time-domain response of a dipole antenna is also computed and finally indoor propagation of electromagnetic wave is analysed.
Keywords:
Wideband Wave Propagation ; Time-Domain Ray-Tracing Method ; Analytical Inversion of Lapluce Transform ; Exponential Expansion ; Time-Domain Reflection ; Time-Domain Transmission

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