Radiation fields of the line source in a cylindrical wire grating

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buir.advisorAltıntaş, Ayhan
dc.contributor.authorKarapınar, Hakan
dc.date.accessioned2016-01-08T20:15:54Z
dc.date.available2016-01-08T20:15:54Z
dc.date.issued1998
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.descriptionAnkara : The Department of Electrical and Electronics Engineering and the Institute of Engineering and Sciences of Bilkent Univ., 1998.en_US
dc.descriptionThesis (Master's) -- Bilkent University, 1998.en_US
dc.descriptionIncludes bibliographical references leaves 64-65.en_US
dc.description.abstractIn this thesis, the transmission effect of a grid structure is analyzed. The grid structure is intended to model the metallic support elements of a radome. The total field for the real and complex position line sources surrounded by the grating structure is obtained in both TM and 7'E polarizations in the far-field region. The grid is considered to be a cylindrical array of perfectly conducting cylinders parallel to the z-axis. The radius of each cylinder is small as compared to the wavelength and the length of the cylinders is infinite. We started with the study of a single perfectly conducting cylinder illuminated by a line source and obtained the formula for the electric and magnetic fields in the far-field region. Then, we calculated far-zone total field for a set of cylinders which form the surface of the radome as a cylindrical periodic grating. The equation for the total electric field in the far-field region is found by using superposition and applying the boundary conditions at the conducting cylinders to find scattering coefficients. Complex line sources are considered to simulate directed beam fields used in practice. The power pattern and directivity are computed for different parameters of the grating and cylinders. A set of figures is presented to show the relationships between the power pattern, directivity and different parameters of the structure.en_US
dc.description.degreeM.S.en_US
dc.description.statementofresponsibilityKarapınar, Hakanen_US
dc.format.extent[xii], 65 leavesen_US
dc.identifier.urihttp://hdl.handle.net/11693/18064
dc.language.isoEnglishen_US
dc.publisherBilkent Universityen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectGrating, directivityen_US
dc.subjectComplex sourceen_US
dc.subject.lccTK6590.R3 K37 1998en_US
dc.subject.lcshRadomes.en_US
dc.titleRadiation fields of the line source in a cylindrical wire gratingen_US
dc.typeThesisen_US

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Dept. of Electrical and Electronics Engineering - Master's degree