Thesis (MScIng)--University of Stellenbosch, 2003. / ENGLISH ABSTRACT: A complete mixed-potential integral equation formulation for the analysis of arbitrarily
shaped scatterers in a planarly layered medium is presented. The integral equation is
able to solve for simultaneous electric and magnetic surface currents using a Method of
Moments (MoM) procedure.
The MoM formulation which was developed uses vector-valued basis functions defined over
a triangular mesh and are used to model electric currents on conducting scatterers and
magnetic currents on slotline structures. The Green’s functions employed in the analysis
were developed for a stratified medium using a Sommerfeld plane wave formulation.
The scheme used for filling the method of moments matrix was designed to simultaneously
solve multiple problems that are stacked and separated by an infinite conducting ground
plane. The filling algorithm also efficiently packs partially symmetric matrices, which
are present when solving problems that support a combination of electric and magnetic
currents.
Several examples are presented to illustrate and validate the analysis method. Numerical
predictions of the scattering parameters (both magnitude and phase) show good correspondence
with results from literature and measured data. / AFRIKAANSE OPSOMMING: ’n Volledige gemengde potensiaal integraalvergelyking formulering vir die analise van
stralers van arbitrˆere vorm binne gelaagde strukture word aangebied. Die integraalvergelyking
kan gelyktydige elektriese en magnetiese oppervlakstrome oplos deur die Metode
van Momente (MoM) te gebruik.
Die MoM formulering gebruik vektor basis funksies wat oor ’n driehoekige diskretisering
gedefinieer word om elektriese strome op geleidende stralers en magnetiese strome op
gleuflyn strukture te modelleer. Die Green’s funksies wat in die analise gebruik word,
is ontwikkel vir gelaagde media deur gebruik te maak van Sommerfeld se platvlakgolf
formulering.
Die metode wat gebruik word om the moment matriks te vul, is ontwerp om meervoudige
gestapelde probleme wat deur oneindig geleidende grondvlakke geskei word, gelyktydig op
te los. Gedeeltelik simmetriese matrikse word ook effektief gevul. Hierdie matrikse kom
voor wanneer probleme ’n kombinasie van elektriese en magnetiese strome ondersteun.
Verskeie voorbeelde word gebruik om die analise metode te verifieer. Numeriese voorspellings
van strooiparameters (beide grootte en hoek) vergelyk baie goed met resultate
en gemete data wat in die literatuur gevind is.
iv
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:sun/oai:scholar.sun.ac.za:10019.1/16425 |
| Date | 12 1900 |
| Creators | Schoeman, Marlize |
| Contributors | Meyer, P., University of Stellenbosch. Faculty of Engineering. Dept. of Electrical and Electronic Engineering. |
| Publisher | Stellenbosch : University of Stellenbosch |
| Source Sets | South African National ETD Portal |
| Language | en_ZA |
| Detected Language | English |
| Type | Thesis |
| Format | xii, 119 leaves |
| Rights | University of Stellenbosch |
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