{"title":"Medical ultrasonic transducers with switchable frequency bands centered about f/sub 0/ and 2f/sub 0/","authors":"T. R. Gururaja, A. Shurland, J. Chen","doi":"10.1109/ULTSYM.1997.663314","DOIUrl":null,"url":null,"abstract":"We present a novel type of ultrasonic imaging transducer in which the operating frequency can be switched between two distinct bands centered about f/sub 0/ and 2f/sub 0/. In effect, we can achieve greater than 100% transducer bandwidth at the -6 dB level. The transducer is based on using DC bias induced piezoelectricity in electrostrictive materials such as lead magnesium niobate-lead titanate (PMN-PT) relaxor ferroelectric materials.","PeriodicalId":6369,"journal":{"name":"1997 IEEE Ultrasonics Symposium Proceedings. An International Symposium (Cat. No.97CH36118)","volume":"1 1","pages":"1659-1662 vol.2"},"PeriodicalIF":0.0000,"publicationDate":"1997-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"11","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"1997 IEEE Ultrasonics Symposium Proceedings. An International Symposium (Cat. No.97CH36118)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ULTSYM.1997.663314","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 11
Abstract
We present a novel type of ultrasonic imaging transducer in which the operating frequency can be switched between two distinct bands centered about f/sub 0/ and 2f/sub 0/. In effect, we can achieve greater than 100% transducer bandwidth at the -6 dB level. The transducer is based on using DC bias induced piezoelectricity in electrostrictive materials such as lead magnesium niobate-lead titanate (PMN-PT) relaxor ferroelectric materials.
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