Determining polarization dependent diffraction coefficients from building edges using FDTD method

Determining polarization dependent diffraction coefficients from building edges using FDTD method

Electromagnetic waves in suburban environment encounter multiple obstructions that shadow the signal. These waves are scattered and random in polarization. They take multiple paths that add as vectors at the portable device. Buildings have vertical and horizontal edges. Diffraction from edges has po...

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Bibliographic Details
Main Author: Asrani, Vijay L.
Format: Others
Published: FIU Digital Commons 1999
Subjects:
Electrical and Computer Engineering
Online Access:http://digitalcommons.fiu.edu/etd/1330
id ndltd-fiu.edu-oai-digitalcommons.fiu.edu-etd-2461
record_format oai_dc
spelling ndltd-fiu.edu-oai-digitalcommons.fiu.edu-etd-24612018-07-19T03:34:13Z Determining polarization dependent diffraction coefficients from building edges using FDTD method Asrani, Vijay L. Electromagnetic waves in suburban environment encounter multiple obstructions that shadow the signal. These waves are scattered and random in polarization. They take multiple paths that add as vectors at the portable device. Buildings have vertical and horizontal edges. Diffraction from edges has polarization dependent characteristics. In practical case, a signal transmitted from a vertically polarized high antenna will result in a significant fraction of total power in the horizontal polarization at the street level. Signal reception can be improved whenever there is a probability of receiving the signal in at least two independent ways or branches. The Finite-Difference Time-Domain (FDTD) method was applied to obtain the two and three-dimensional dyadic diffraction coefficients (soft and hard) of right-angle perfect electric conductor (PEC) wedges illuminated by a plane wave. The FDTD results were in good agreement with the asymptotic solutions obtained using Uniform Theory of Diffraction (UTD). Further, a material wedge replaced the PEC wedge and the dyadic diffraction coefficient for the same was obtained. 1999-09-28T07:00:00Z text application/pdf http://digitalcommons.fiu.edu/etd/1330 FIU Electronic Theses and Dissertations FIU Digital Commons Electrical and Computer Engineering
collection NDLTD
format Others
sources NDLTD
topic Electrical and Computer Engineering
spellingShingle Electrical and Computer Engineering
Asrani, Vijay L.
Determining polarization dependent diffraction coefficients from building edges using FDTD method
description Electromagnetic waves in suburban environment encounter multiple obstructions that shadow the signal. These waves are scattered and random in polarization. They take multiple paths that add as vectors at the portable device. Buildings have vertical and horizontal edges. Diffraction from edges has polarization dependent characteristics. In practical case, a signal transmitted from a vertically polarized high antenna will result in a significant fraction of total power in the horizontal polarization at the street level. Signal reception can be improved whenever there is a probability of receiving the signal in at least two independent ways or branches. The Finite-Difference Time-Domain (FDTD) method was applied to obtain the two and three-dimensional dyadic diffraction coefficients (soft and hard) of right-angle perfect electric conductor (PEC) wedges illuminated by a plane wave. The FDTD results were in good agreement with the asymptotic solutions obtained using Uniform Theory of Diffraction (UTD). Further, a material wedge replaced the PEC wedge and the dyadic diffraction coefficient for the same was obtained.
author Asrani, Vijay L.
author_facet Asrani, Vijay L.
author_sort Asrani, Vijay L.
title Determining polarization dependent diffraction coefficients from building edges using FDTD method
title_short Determining polarization dependent diffraction coefficients from building edges using FDTD method
title_full Determining polarization dependent diffraction coefficients from building edges using FDTD method
title_fullStr Determining polarization dependent diffraction coefficients from building edges using FDTD method
title_full_unstemmed Determining polarization dependent diffraction coefficients from building edges using FDTD method
title_sort determining polarization dependent diffraction coefficients from building edges using fdtd method
publisher FIU Digital Commons
publishDate 1999
url http://digitalcommons.fiu.edu/etd/1330
work_keys_str_mv AT asranivijayl determiningpolarizationdependentdiffractioncoefficientsfrombuildingedgesusingfdtdmethod
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