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dc.contributor.authorBayram, C.en_US
dc.contributor.authorOlcum, S.en_US
dc.contributor.authorSenlik, M.N.en_US
dc.contributor.authorAtalar, Abdullahen_US
dc.date.accessioned2016-02-08T11:51:25Z
dc.date.available2016-02-08T11:51:25Z
dc.date.issued2005en_US
dc.identifier.issn1051-0117
dc.identifier.urihttp://hdl.handle.net/11693/27361
dc.description.abstractA capacitive micromachined ultrasonic transducer (cMUT) is typically fabricated by concatenation of several cMUT cells with identical physical dimensions. If the membrane thickness is kept fixed, the radius of the cMUT determines the center frequency of operation. A smaller radius implies a greater center frequency. Therefore, it should be possible to put cMUTs with different sizes in parallel to get a larger bandwidth at the expense of gain. In this study, we investigate the optimization of the bandwidth characteristics of a cMUT by using mixed size cells. We designed two mixed size cMUT arrays with a predicted optimized fractional bandwidth value of about 155% at 5.4 MHz, and 146% at 8.8 MHz. These values are about 55% and 58% better than what can be achieved with a uniform size array at the corresponding center frequencies. There is almost no loss in the gain bandwidth product when two different sized cMUTs are used in parallel. There is about 9% increase in gain bandwidth product when three different sized cMUTs are used in parallel. It is shown, in this study, that gain bandwidth product and bandwidth can be enhanced by use of mixed size cMUT cells. © 2005 IEEE.en_US
dc.language.isoEnglishen_US
dc.source.titleProceedings - IEEE Ultrasonics Symposiumen_US
dc.relation.isversionofhttps://doi.org/10.1109/ULTSYM.2005.1603258en_US
dc.subjectBandwidthen_US
dc.subjectGain measurementen_US
dc.subjectNatural frequenciesen_US
dc.subjectOptimizationen_US
dc.subjectUltrasonic transducersen_US
dc.subjectCapacitive micromachined ultrasonic transducer (CMUT)en_US
dc.subjectConcatenationen_US
dc.subjectGain bandwidth producten_US
dc.subjectAcoustic arraysen_US
dc.titleBandwidth improvement in a cMUT array with mixed sized elementsen_US
dc.typeConference Paperen_US
dc.departmentDepartment of Electrical and Electronics Engineering
dc.citation.spage1956en_US
dc.citation.epage1959en_US
dc.citation.volumeNumber4en_US
dc.identifier.doi10.1109/ULTSYM.2005.1603258en_US


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