A6-a1 - Development of a method to characterize CMUT receiver behavior
- Event
- 2025 ICU PADERBORN - 9th International Congress on Ultrasonics
2025-09-21 - 2025-09-25
Paderborn - Band
- Lectures
- Chapter
- A6-a - Micromachined Ultrasonic Transducer (CMUT and PMUT) Technologies and Applications
- Author(s)
- M. Städler, J. Kober, T. Trittler, M. Herzog, J. Hampe - Dresden University of Technology, Dresden (Germany), M. Kircher - Fraunhofer IPMS, Dresden (Germany), H. Heuer - Fraunhofer IKTS, Dresden (Germany)
- Pages
- 57 - 60
- DOI
- 10.5162/Ultrasonic2025/A6-a1
- ISBN
- 978-3-910600-08-9
- Price
- free
Abstract
This study presents a method of characterizing the performance of a capacitive micromachined ultrasound transducer (CMUT) as receiver using a chirp signal on the transmitter. This approach enables the spectral analysis of key characterization parameters - sensitivity, bandwidth, and noise equivalent pressure within a single-shot measurement. To assess the effectiveness of the chirp-based approach relative to conventional single-tone excitation, both signal types were applied in a pitch-and-catch experiment involving two distinct CMUT probes. The results demonstrate a higher-resolved bandwidth and improved robustness against uncorrelated acoustic noise when employing the chirp excitation signal.