Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Three dimensional indoor electromagnetic wave propagation modeling using a hybrid method
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering.
2011 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The objective of this project has been to develop a method to predict three dimensional indoor electromagnetic propagation.For this purpose, a hybrid method has been introduced, consisting in modeling the hallways as waveguides with Perfect Electric Conductor walls, and analyzing the propagation from a modal point of view.

Two different methods were used in order to model changes in the guide, Modal Match- ing for changes in width and height, and Finite Differences in Time Domain (FDTD) for the cases in which the translation symmetry is not maintained. Cuboids were used for the shape of the FDTD sections. The Yee cell was used forĀ  iscretization, and Uniaxial Perfectly Matched Layers to model windows and the different ports were the excitation is inserted, and the fields are extracted. This approach allows reflection-free ports, so they can be considered adapted, and therefore a modal scattering matrix representation becomes possible.

The results for the Modal Matching subproblem were satisfactory, as opposed to those obtained by FDTD. For the case of a turn, the results for the mode TE10 were accept-able, despite presenting systematic errors and numerical artifacts, which got worse for the superior modes. The time requirements did not show a dramatic improvement, due to the number of matrix multiplications needed to sample the the fields in the ports located on the faces of the cuboid after every FDTD iteration.

The conclusion obtained is that a new implementation of the FDTD subproblem is needed in order to achieve the objectives of accuracy and computing speed.

Place, publisher, year, edition, pages
2011. , 101 p.
Series
EES Examensarbete / Master Thesis, XR-EE-ETK 2011:011
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-53438OAI: oai:DiVA.org:kth-53438DiVA: diva2:470064
Uppsok
Technology
Examiners
Available from: 2012-01-19 Created: 2011-12-28 Last updated: 2012-03-21Bibliographically approved

Open Access in DiVA

fulltext(5089 kB)521 downloads
File information
File name FULLTEXT01.pdfFile size 5089 kBChecksum SHA-512
09da3199d226e8b998990d87cdbfca576219e7780e1a5208db434da404737242473d1ac0972711cfa417478fc8dbdc1639441909d58f6176269a69f94fa718c6
Type fulltextMimetype application/pdf

By organisation
Electromagnetic Engineering
Engineering and Technology

Search outside of DiVA

GoogleGoogle Scholar
Total: 521 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 170 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf