Title :
Design of a 50 MHz annular array using fine-grain lead titanate
Author :
Snook, Kevin ; Shrout, Thomas ; Shung, K. Kirk
Author_Institution :
Resource Center for Med. Ultrasound Transducer Technol., Pennsylvania State Univ., University Park, PA, USA
fDate :
28 May-1 June 2002
Abstract :
An annular array with equal area elements has been fabricated and tested. The elements are made from a novel fine-grain lead titanate which was micromachined using a laser to form the kerfs. Resonance methods showed the lead titanate exhibited electromechanical properties similar to bulk materials, including a thickness coupling kt of 0.49 and low permittivity (ε33S/ε0=178). An average center frequency of 53 MHz with 40% bandwidth was obtained across all the elements. Crosstalk levels were below -20 dB in water. Good agreement was obtained between the measured results and a finite element model.
Keywords :
biomedical transducers; crosstalk; finite element analysis; lead compounds; micromachining; piezoceramics; piezoelectric transducers; ultrasonic transducer arrays; (Pb0.85Sm0.1)(Ti0.98Mn0.02)O3; 50 MHz; 50 MHz annular array design; 53 MHz; PbTiO3; annular array; average center frequency; bandwidth; bulk materials; crosstalk levels; dermatology; electromechanical properties; equal area elements; fine-grain lead titanate; finite element model; high frequency ultrasound systems; kerfs; laser micromachining; low permittivity; ophthalmology; piezoceramics; resonance methods; thickness coupling; water; Dielectric materials; Finite element methods; Frequency; Impedance; Passband; Permittivity; Resonance; Titanium compounds; Ultrasonic imaging; Ultrasonic transducers;
Conference_Titel :
Applications of Ferroelectrics, 2002. ISAF 2002. Proceedings of the 13th IEEE International Symposium on
Print_ISBN :
0-7803-7414-2
DOI :
10.1109/ISAF.2002.1195941
