New techniques to design performance improved power dividers and directional couplers using the new scattering parameter relations

Simple item page
buir.advisorAtalar, Abdullah
dc.contributor.authorTaş, Vahdettin
dc.date.accessioned2016-01-08T20:19:52Z
dc.date.available2016-01-08T20:19:52Z
dc.date.issued2015
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.descriptionAnkara : The Department of Electrical and Electronics Engineering and The Graduate School of Engineering and Science of Bilkent Univesity, 2015.en_US
dc.descriptionThesis (Ph. D.) -- Bilkent University, 2015.en_US
dc.descriptionIncludes bibliographical references leaves 64-69.en_US
dc.description.abstractWide bandwidth provides with several benefits in RF applications such as enabling high data rates for communication applications, enhancing the multi tread avoiding capabilities of the jamming systems, improving the effectiveness of spread spectrum techniques. Operation in a wide bandwidth requires either broadband components or multiple narrow band components together with sophisticated multiplexing methods. There are several trivial methods to increase the bandwidth of the RF components. For instance the bandwidth of a power divider can be increased by increasing the number of sections which directly increases the insertion loss and circuit size, burdening a big trade off for the designer. The methods avoiding such a trade off are life savers in most of the applications. Such methods require new design approaches. This work aims to develop such methods with a special focus on improving the bandwidth and performance of the power dividers and directional couplers. We derive new scattering parameter relations and show that the relations require tricky design guidelines. S-parameter relations for a number of power divider types and directional coupler schemes are investigated. The derived equations have significant usages. One of the equations is used to design the optimal isolation network for the Wilkinson power divider. A number of equations imply a reduction in the number of the optimization parameters in the design of n-section or n-way dividers. Another equation is used to increase the directivity of microstrip directional couplers in a wide bandwidth. Experimental results are presented verifying the theoretical work.en_US
dc.description.degreePh.D.en_US
dc.description.statementofresponsibilityTaş, Vahdettinen_US
dc.format.extentxiv, 71 leaves, chartsen_US
dc.identifier.urihttp://hdl.handle.net/11693/18502
dc.language.isoEnglishen_US
dc.publisherBilkent Universityen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectScattering parametersen_US
dc.subjecthigh directivityen_US
dc.subjectcoupling isolation phase differenceen_US
dc.subjectcoupler phase relationsen_US
dc.subjectreflection coefficientsen_US
dc.subjectodd modeen_US
dc.subjecteven modeen_US
dc.subjectisolation networken_US
dc.subjectwideband power divideren_US
dc.subjectWilkinson divideren_US
dc.subject.lccQC665.S3 T37 2015en_US
dc.subject.lcshElectric waves--Scattering.en_US
dc.subject.lcshPower electronics.en_US
dc.titleNew techniques to design performance improved power dividers and directional couplers using the new scattering parameter relationsen_US
dc.typeThesisen_US

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
tez_vahdettin_tas.pdf
Size:
1.56 MB
Format:
Adobe Portable Document Format
Description:
Full printable version
Download

Collections

Dept. of Electrical and Electronics Engineering - Ph.D. / Sc.D.