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首页> 外文期刊>Ultrasonics, Ferroelectrics and Frequency Control, IEEE Transactions on >A high-frequency annular-array transducer using an interdigital bonded 1-3 composite
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A high-frequency annular-array transducer using an interdigital bonded 1-3 composite

机译：使用叉指结合1-3复合材料的高频环形阵列换能器

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摘要

This paper reports the design, fabrication, and characterization of a 1¿3 composite annular-array transducer. An interdigital bonded (IB) 1¿3 composite was prepared using two IB operations on a fine-grain piezoelectric ceramic. The final composite had 19-¿m-wide posts separated by 6-¿m-wide polymer kerfs. A novel method to remove metal electrodes from polymer portions of the 1¿3 composite was established to eliminate the need for patterning and aligning the electrode on the composite to the electrodes on a flexible circuit. Unloaded epoxy was used for both the matching and backing layers and a flexible circuit was used for interconnect. A prototype array was successfully fabricated and tested. The results were in reasonable agreement with those predicted by a circuit-analogous model. The average center frequency estimated from the measured pulse-echo responses of array elements was 33.5 MHz and the ¿6-dB fractional bandwidth was 57%. The average insertion loss recorded was 14.3 dB, and the maximum crosstalk between the nearest-neighbor elements was less than ¿37 dB. Images of a wire phantom and excised porcine eye were obtained to show the capabilities of the array for high-frequency ultrasound imaging.
机译：本文报告了1×3复合环形阵列换能器的设计，制造和表征。使用两个IB操作在细晶粒压电陶瓷上制备叉指式（IB）1×3复合材料。最终的复合材料具有19米宽的杆，并由6米宽的聚合物切缝隔开。建立了一种从1×3复合材料的聚合物部分去除金属电极的新颖方法，从而消除了将复合材料上的电极图案化和对准柔性电路上的电极的需求。匹配层和背衬层均使用了未加载的环氧树脂，互连使用了柔性电路。原型阵列已成功制造和测试。结果与电路类似模型预测的结果合理吻合。从测量的阵列元素的脉冲回波响应估计的平均中心频率是33.5 MHz，并且6 dB的分数带宽是57％。记录的平均插入损耗为14.3 dB，最近的相邻元素之间的最大串扰小于Â37dB。获得线状体模和切除的猪眼的图像以显示阵列用于高频超声成像的功能。

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