首页> 美国卫生研究院文献>Sensors (Basel Switzerland) >Development of Broadband High-Frequency Piezoelectric Micromachined Ultrasonic Transducer Array
【2h】

Development of Broadband High-Frequency Piezoelectric Micromachined Ultrasonic Transducer Array

机译:宽带高频压电微机械超声换能器阵列的开发

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务,本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文,但由于OA文献来源多样且变更频繁,仍可能出现获取不到、文献不完整或与标题不符等情况,如果获取不到我们将提供退款服务。请知悉。

摘要

Piezoelectric micromachined ultrasonic transducers (PMUT) are promising elements to fabricate a two-dimensional (2D) array with a pitch small enough (approximately half wavelength) to form and receive arbitrary acoustic beams for medical imaging. However, PMUT arrays have so far failed to combine the wide, high-frequency bandwidth needed to achieve a high axial resolution. In this paper, a polydimethylsiloxane (PDMS) backing structure is introduced into the PMUTs to improve the device bandwidth while keeping a sub-wavelength (λ) pitch. We implement this backing on a 16 × 8 array with 75 µm pitch (3λ/4) with a 15 MHz working frequency. Adding the backing nearly doubles the bandwidth to 92% (−6 dB) and has little influence on the impulse response sensitivity. By widening the transducer bandwidth, this backing may enable using PMUT ultrasonic arrays for high-resolution 3D imaging.
机译:压电微机械超声换能器(Pmut)是有希望的元件,用于制造具有足够小(大约半波长)的间距的二维(2D)阵列以形成和接收用于医学成像的任意声学束。然而,Pmut阵列到目前为止未能结合实现高轴向分辨率所需的宽高频率带宽。在本文中,将聚二甲基硅氧烷(PDMS)背衬结构引入PMUT中以改善装置带宽,同时保持子波长(λ)间距。我们在16×8阵列上实现了16×8阵列的支持,具有75μm的音高(3 ^ / 4),工作频率为15 MHz。将背衬添加几乎加倍的带宽至92%(-6 dB),对脉冲响应灵敏度几乎没有影响。通过加宽换能器带宽,该背衬可以使用用于高分辨率3D成像的PMUT超声阵列。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号