Application of characteristic basis function method for scattering from and propagation over terrain profiles

dc.contributor.advisorErtürk, Vakur B.
dc.contributor.authorYağbasan, Atacan
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.descriptionAnkara : The Department of Electrical and Electronics Engineering and the Institute of Engineering and Science of Bilkent University, 2009.en_US
dc.descriptionThesis (Master's) -- Bilkent University, 2009.en_US
dc.descriptionIncludes bibliographical references leaves 69-73.en_US
dc.description.abstractA computationally efficient hybrid method, that combines the characteristic basis function method and the physical optics as well as the forward backward method, is applied for the solution of integral equations used to investigate the electromagnetic scattering from and propagation over large scale rough terrain problems. The method utilizes high-level basis functions defined on macro-domains (named as blocks) namely characteristic basis functions that are constructed by aggregating low-level basis functions (i.e., conventional sub-domain basis functions). In the construction of the abovementioned characteristic basis functions, forward backward method as well as the physical optics approach (when applicable) are used. The conventional characteristic basis function method originally developed by Prakash et al. is slightly modified to handle large terrain problems, and is further embellished by accelerating it and by reducing its storage requirements via the use of an extrapolation procedure. Numerical results for the induced currents, total fields and path loss are presented and compared with either measured or previously published reference solutions to assess the efficiency and the accuracy of the method. Besides, certain parametric studies and convergence tests have been carried out.en_US
dc.description.statementofresponsibilityYağbasan, Atacanen_US
dc.format.extentx, 73 leavesen_US
dc.publisherBilkent Universityen_US
dc.subjectElectromagnetic Scatteringen_US
dc.subjectCharacteristic Basis Function Methoden_US
dc.subjectPhysical Opticsen_US
dc.subjectForward-Backward Methoden_US
dc.subjectMethod of Momentsen_US
dc.subject.lccQC665.S3 Y34 2009en_US
dc.subject.lcshElectromagnetic waves--Scattering.en_US
dc.subject.lcshPhysical optics.en_US
dc.titleApplication of characteristic basis function method for scattering from and propagation over terrain profilesen_US
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