Improvement of Sensitivity of Capacitive Micromachined Ultrasound Transducer | Zendy

Yifan Wang | Zendy; Shuo Liu | Zendy

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Improvement of Sensitivity of Capacitive Micromachined Ultrasound Transducer

Author(s) -

Yifan Wang,

Shuo Liu

Publication year - 2021

Publication title -

iop conference series earth and environmental science

Language(s) - English

Resource type - Journals

eISSN - 1755-1307

pISSN - 1755-1315

DOI - 10.1088/1755-1315/631/1/012086

Subject(s) - capacitive micromachined ultrasonic transducers , sensitivity (control systems) , transducer , capacitive sensing , ultrasonic sensor , acoustics , signal (programming language) , noise (video) , materials science , capacitor , ultrasound , electronic engineering , computer science , electrical engineering , engineering , physics , voltage , image (mathematics) , artificial intelligence , programming language

CMUT (Capacitive Micromachined Ultrasonic Transducer) has a wild range of applications in medical detecting and imaging fields. However, operating under self-generating-self-receiving (SGSR) method usually results in poor sensitivity. But the sensitivity cannot be improved simply by increasing the resonant frequency since the frequency of a specific kind of CMUT is designed for specific usage. In this paper, based on one specific type of CMUT, a mechanical model is built and the simulation analysis is demonstrated. A brand-new method one-generating-multiple-receiving (OGMR) is introduced and a special circuit model has been designed to improve the signal to thermal noise ratio. By increasing the number of receiving capacitors from 1 to 8, we increased the signal-noise ratio to 2.83 times.

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