DESIGN OF EFFICIENT BROAD-BAND PIEZOELECTRIC TRANSDUCERS
DESIGN OF EFFICIENT BROAD-BAND PIEZOELECTRIC TRANSDUCERS
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DOI：
10.1109/t-su.1978.31001
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发表时间：
1978-01-01
期刊：
影响因子：
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通讯作者：
KINO, GS
中科院分区：
文献类型：
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作者：
DESILETS, CS;FRASER, JD;KINO, GS
提出了一种高效率、宽频带、脉冲响应好的声薄盘换能器的设计方法。这种方法是基于在压电材料和声负载之间使用四分之一波匹配层。如Krimholtz，Leedon和Matthaei的传输线模型所证明的，在匹配层设计中必须考虑压电材料的有限厚度。给出了给定压电材料的宽带换能器优化设计准则，说明了高机电耦合系数的重要性。文中还给出了获得最佳脉冲响应所必需的高斯型通带的方法。用几个换能器来说明这种设计方法，理论和实验符合得很好。其中一个换能器具有3.2分贝往返插入损耗和一个倍频程带宽。
A design method for acoustic thin disk transducers with high efficiency, broad bandwidth, and good impulse response is presented. This method is based on the use of quarter-wave matching layers between the piezoelectric material and the acoustic load. As is made evident using the transmission line model of Krimholtz, Leedom, and Matthaei, the finite thickness of the piezoelectric material must be taken into account in the matching layer design. Criteria for optimum broad-band transducer designs with a given piezoelectric material are developed which show the importance of a high electromechanical coupling coefficient. A method for obtaining Gaussian shaped passbands, necessary for optimum impulse response, is also shown. Several transducers have been built to illustrate this design approach with excellent agreement between theory and experiment. One such transducer has 3.2 dB round trip insertion loss and one octave bandwidth.