A micro dual-frequency transducer based on contour-extensional vibration and thickness mode
Weiwei Shao,
Peiyang Li,
Zhangjian Li,
Jie Xu,
Yang Jiao,
Yaoyao Cui
Affiliations
Weiwei Shao
Medical Acoustic Technology Department, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou, Jiangsu 215163, People’s Republic of China
Peiyang Li
Medical Acoustic Technology Department, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou, Jiangsu 215163, People’s Republic of China
Zhangjian Li
Medical Acoustic Technology Department, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou, Jiangsu 215163, People’s Republic of China
Jie Xu
Medical Acoustic Technology Department, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou, Jiangsu 215163, People’s Republic of China
Yang Jiao
Medical Acoustic Technology Department, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou, Jiangsu 215163, People’s Republic of China
Yaoyao Cui
Medical Acoustic Technology Department, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou, Jiangsu 215163, People’s Republic of China
This paper presents a single piezoelectric transducer with dual-frequency characters by utilizing contour-extensional mode and thickness mode. A 2.5 MHz and 8.5 MHz frequency transducer prototype is designed by Finite element method (FEM) analyses and verified by experiment. Performance of the transducer is then evaluated through the measurement of admittance curves and pulse-echo responses. It’s demonstrated experimentally that the proposed transducer has -6dB bandwidth of 39.4% @1.0 Vpp at 2.4 MHz and 34.6% @1.1 Vpp at 8.9 MHz, respectively. The proposed dual-frequency transducer has potential applications in vivo thrombolytic therapy and ultrasound-guide of pedicle screws.
