PMN-PT single-crystal high-frequency kerfless phased array

Chen, R., Cabrera-Munoz, N. E., Lam, K. H. , Hsu, H.-s., Zheng, F., Zhou, Q. and Shung, K. K. (2014) PMN-PT single-crystal high-frequency kerfless phased array. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 61(6), pp. 1033-1041. (doi: 10.1109/TUFFC.2014.2999)

Abstract

This paper reports the design, fabrication, and characterization of a miniature high-frequency kerfless phased array prepared from a PMN-PT single crystal for forward-looking intravascular or endoscopic imaging applications. After lapping down to around 40 μm, the PMN-PT material was utilized to fabricate 32-element kerfless phased arrays using micromachining techniques. The aperture size of the active area was only 1.0 × 1.0 mm. The measured results showed that the array had a center frequency of 40 MHz, a bandwidth of 34% at -6 dB with a polymer matching layer, and an insertion loss of 20 dB at the center frequency. Phantom images were acquired and compared with simulated images. The results suggest that the feasibility of developing a phased array mounted at the tip of a forward-looking intravascular catheter or endoscope. The fabricated array exhibits much higher sensitivity than PZT ceramic-based arrays and demonstrates that PMN-PT is well suited for this application.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Lam, Dr Koko
• Authors: Chen, R., Cabrera-Munoz, N. E., Lam, K. H., Hsu, H.-s., Zheng, F., Zhou, Q., and Shung, K. K.
• College/School: College of Science and Engineering > School of Engineering > Systems Power and Energy
• Journal Name: IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control
• Publisher: Institute of Electrical and Electronics Engineers
• ISSN: 0885-3010
• ISSN (Online): 1525-8955
• Published Online: 21 May 2014