Abstract A piezoelectric composite transducer was developed in this study to improve the bandwidth and beamwidth of the high-frequency transducer. The piezocomposite was designed as arc-shaped to expand the beamwidth, and the matching layer technique was adopted to increase the bandwidth. The directivity function was obtained by the acoustic field theory. The parameters of the matching layer were also calculated using the quarter-wavelength model. Then, a novel preparation process of arc 1–3 piezoelectric composite was given in detail. Finally, the arc 1–3 piezocomposite and transducer were prepared and tested. The bandwidth and beamwidth of the transducer reach 100 kHz and 123°, respectively. Experimental results show that the designed transducer realizes the aims of broadband and wide-beam.

中文翻译：

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宽带宽波束高频换能器的设计与制备

摘要 本研究开发了一种压电复合换能器，以提高高频换能器的带宽和波束宽度。压电复合材料设计为圆弧形以扩大波束宽度，并采用匹配层技术增加带宽。方向性函数是通过声场理论获得的。匹配层的参数也使用四分之一波长模型计算。然后，详细给出了弧1-3压电复合材料的新制备工艺。最后，准备并测试了 arc 1-3 压电复合材料和换能器。换能器的带宽和波束宽度分别达到 100 kHz 和 123°。实验结果表明，所设计的换能器实现了宽带和宽波束的目标。