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dc.contributor.authorSenlik, M. N.en_US
dc.contributor.authorOlcum, S.en_US
dc.contributor.authorKöymen, H.en_US
dc.contributor.authorAtalar, Abdullahen_US
dc.date.accessioned2016-02-08T09:59:08Z
dc.date.available2016-02-08T09:59:08Z
dc.date.issued2010en_US
dc.identifier.issn0885-3010
dc.identifier.urihttp://hdl.handle.net/11693/22364
dc.description.abstractThe radiation impedance of a capacitive micromachined ultrasonic transducer (cMUT) with a circular membrane is calculated analytically using its velocity profile for the frequencies up to its parallel resonance frequency for both the immersion and the airborne applications. The results are verified by finite element simulations. The work is extended to calculate the radiation impedance of an array of cMUT cells positioned in a hexagonal pattern. A higher radiation resistance improves the bandwidth as well as the efficiency of the cMUT. The radiation resistance is determined to be a strong function of the cell spacing. It is shown that a center-to-center cell spacing of 1.25 wavelengths maximizes the radiation resistance, if the membranes are not too thin. It is also found that excitation of nonsymmetric modes may reduce the radiation resistance in immersion applications.en_US
dc.description.sponsorshipTurkish Scientific and Research Council (TUBITAK)en_US
dc.language.isoEnglishen_US
dc.source.titleIEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Controlen_US
dc.relation.isversionofhttp://dx.doi.org/10.1109/TUFFC.20http://dx.doi.org/10.1501en_US
dc.subjectA-centeren_US
dc.subjectAirborne applicationsen_US
dc.subjectCapacitive micromachined ultrasonic transduceren_US
dc.subjectCell spacingsen_US
dc.subjectCircular membranesen_US
dc.subjectFinite element simulationsen_US
dc.subjectHexagonal patternen_US
dc.subjectNonsymmetricen_US
dc.subjectParallel resonanceen_US
dc.subjectRadiation impedanceen_US
dc.subjectRadiation resistanceen_US
dc.subjectVelocity profilesen_US
dc.subjectPlates (structural components)en_US
dc.subjectResonanceen_US
dc.subjectTransducersen_US
dc.subjectUltrasonic equipmenten_US
dc.subjectUltrasonic measurementen_US
dc.subjectUltrasonic transducersen_US
dc.subjectUltrasonic wavesen_US
dc.subjectUltrasonicsen_US
dc.subjectRadiationen_US
dc.titleRadiation impedance of an array of circular capacitive micromachined ultrasonic transducersen_US
dc.typeArticleen_US
dc.departmentDepartment of Electrical and Electronics Engineering
dc.citation.spage969en_US
dc.citation.epage976en_US
dc.citation.volumeNumber57en_US
dc.citation.issueNumber4en_US
dc.identifier.doi10.1109/TUFFC.2010.1501en_US
dc.publisherIEEEen_US


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