Switched boundary condition techniques in FDTD

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dc.contributor.advisorOkoniewski, Michal
dc.contributor.authorKivi, Jeremy
dc.date.accessioned2005-08-16T17:06:27Z
dc.date.available2005-08-16T17:06:27Z
dc.date.issued2004
dc.descriptionBibliography: p. 120-123en
dc.description.abstractThe Finite-Difference Time-Domain (FDTD) method is a numerical technique that is used to analyze complex electromagnetic problems. The memory requirement and time duration of a given FDTD simulation are critical issues that are consistently ad­dressed in research. Absorbing Boundary Conditions (ABCs) attempt to solve these issues by effectively extending the simulation domain to infinity. Current widely used boundary conditions like the Perfectly Matched Layer (PML) have high absorption characteristics however the memory and time required to use and implement this method is relatively high. A new boundary class is proposed that takes advantage of the time domain prop­erties of FDTD to construct an ABC with low memory requirement and compara­tively high absorption. This method involves a switched impedance that upconverts waves incident on the boundary to high frequency. This high frequency energy can then be removed from the simulation using the inherent attenuation properties of numerical dispersion in FDTD. A hybrid ABC is developed integrating the Switched Boundary Condition (XBC) with existing classical Mur and PML boundaries. The new XBC class is validated against existing ABCs over a set of test sim­ulations giving an overall performance evaluation of each boundary. The switched boundary implementations are found to offer complete absorption, however, this is only valid in specific FDTD cases. A hybrid, 1st order, switched Mur boundary is designed giving a general boundary solution with improved absorption over standard Mur and 4-layer PML in all simulation cases.en
dc.format.extentxii, 135 leaves : ill. ; 30 cm.en
dc.identifier.citationKivi, J. (2004). Switched boundary condition techniques in FDTD (Master's thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca. doi:10.11575/PRISM/19583en_US
dc.identifier.doihttp://dx.doi.org/10.11575/PRISM/19583
dc.identifier.isbn0612975622en
dc.identifier.lccAC1 .T484 2004 K485en
dc.identifier.urihttp://hdl.handle.net/1880/41671
dc.language.isoeng
dc.publisher.institutionUniversity of Calgaryen
dc.publisher.placeCalgaryen
dc.rightsUniversity of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.
dc.titleSwitched boundary condition techniques in FDTD
dc.typemaster thesis
thesis.degree.disciplineElectrical and Computer Engineering
thesis.degree.grantorUniversity of Calgary
thesis.degree.nameMaster of Science (MSc)
ucalgary.item.requestcopytrue
ucalgary.thesis.accessionTheses Collection 58.002:Box 1512 520492029
ucalgary.thesis.notesUARCen
ucalgary.thesis.uarcreleaseyen
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