Ke, Q., Liew, W. H., Zhang, L., Tan, C. Y., Jiang, C.-Y., Tan, C. K. I., & Yao, K. (2021). Concave Array Ultrasonic Transducer From Multilayer Piezoelectric Ceramic for Photoacoustic Imaging. IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 68(8), 2760–2765. doi:10.1109/tuffc.2021.3077889
Abstract:
Implementation of piezoelectric multilayer ceramic (MLC) is an effective way to reduce impedance and improve performance of linear array transducer for ultrasonic system applications. However, the ultrasonic image derived from a planar linear array transducer generally suffers from degradation of lateral resolution and contrast. Here we designed and fabricated a focused 5-MHz 128-element linear array ultrasonic transducer with concave structure using 5-layered PNN-PZN-PMN-PZ-PT piezoelectric ceramic. The transducer showed a bandwidth of 63 % at -6 dB, and the lateral resolution up to 0.33 mm. An improved transmission signal of 90% higher than commercial single-layer ceramic transducer was also achieved. We further demonstrated a high-resolution photoacoustic imaging with the obtained concave linear array transducer.
License type:
Publisher Copyright
Funding Info:
This research / project is supported by the National Research Foundation, Singapore - Competitive Research Programme of Singapore
Grant Reference no. : NRF-CRP15-2015-04