Title :
Numerical evaluation of a composite-based multiple-resonance transducer
Author :
Nakamura, Kentaro ; Wada, Yuji ; Koyama, Daisuke ; Saito, Shigimi ; Akiyama, Iwaki
Author_Institution :
Tokyo Inst. of Technol., Tokyo, Japan
Abstract :
Beam patterns in a composite-based multiple-resonance transducer are discussed. Vibration of transducer and beam pattern are simulated using finite element analysis. By dividing one side of electrode of the transducer into inner and outer electrodes, frequency dependence of the beam is suppressed. To optimize the beam, the area ratio was determined to be 1:3, all part of the transducer vibrates in the low frequency region while only the inner part activated the vibration in high frequency region.
Keywords :
biomedical electrodes; biomedical transducers; biomedical ultrasonics; finite element analysis; physiological models; beam patterns; composite-based multiple-resonance transducer; electrodes; finite element analysis; frequency dependence; high frequency region; low frequency region; numerical evaluation; transducer vibration; Acoustics; Analytical models; Electrodes; Finite element methods; Surface impedance; Transducers; Vibrations;
Conference_Titel :
Ultrasonics Symposium (IUS), 2010 IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
978-1-4577-0382-9
DOI :
10.1109/ULTSYM.2010.5935681
