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dc.contributor.advisorYtterdal, Trondnb_NO
dc.contributor.advisorJohansen, Tonni Franke
dc.contributor.authorNygren, Morten Wollertnb_NO
dc.date.accessioned2014-12-19T13:46:21Z
dc.date.accessioned2015-12-22T11:44:51Z
dc.date.available2014-12-19T13:46:21Z
dc.date.available2015-12-22T11:44:51Z
dc.date.created2011-04-05nb_NO
dc.date.issued2011nb_NO
dc.identifier408467nb_NO
dc.identifierntnudaim:5635
dc.identifier.urihttp://hdl.handle.net/11250/2370155
dc.description.abstractThe optimization of piezoelectric ultrasonic transducers has tradisionally been done through trial and error, somewhat guided by one-dimentional simulations. This can often be a very time-consuming and expensive process, hence a more extensive simulation method is desired.A series of finite element models of piezoelectric ultrasonic transducer has been made in COMSOL Multiphysics. The initial models were designed to emulate the conditions assumed in a one-dimentional transducer model, and their validity could thus be confirmed by said model. Later models did not emulate these conditions, and a lossless model of a spherical disc with backing and a single matching layer was successfully implemented. Attemps had been made to include mechanical loss in the initial models, but was only partially achieved. All loss was thus excluded from later models. A final model with a piezoelectric layer poled in the radial direction was not successfully designed, as the varying poling direction proved to be difficult to implement.nb_NO
dc.languageengnb_NO
dc.publisherInstitutt for elektronikk og telekommunikasjonnb_NO
dc.subjectntnudaim:5635no_NO
dc.subjectSIE6 elektronikk
dc.subjectNanoelektronikk og mikrosystemer
dc.titleFinite Element Modeling of Piezoelectric Ultrasonic Transducersnb_NO
dc.typeMaster thesisnb_NO
dc.source.pagenumber72nb_NO
dc.contributor.departmentNorges teknisk-naturvitenskapelige universitet, Fakultet for informasjonsteknologi, matematikk og elektroteknikk, Institutt for elektronikk og telekommunikasjonnb_NO


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