Unified Method of Calculating Impulse Response and Frequency Response in Piezoelectric Transducer with Inhomogeneous Structure

2007 ◽  
Author(s):  
Michio Ohki
Keyword(s):  
Frequency Response ◽  
Impulse Response ◽  
Piezoelectric Transducer ◽  
Inhomogeneous Structure ◽  
Unified Method

Research on Piezoelectric Transducer with Negative Impedance by FEM

2012 ◽  
Vol 182-183 ◽  
pp. 1634-1637 ◽  
Author(s):  
Wen Qun Zhang ◽  
Xin Yue Wu ◽  
Wen Cao
Keyword(s):  
Frequency Response ◽  
Sound Wave ◽  
Piezoelectric Transducer ◽  
Constitutive Equations ◽  
Wave Equations ◽  
Impedance Matching ◽  
Low Frequencies ◽  
Response Characteristics ◽  
In Series ◽  
Frequency Response Characteristics

Piezoelectric transducer with negative impedance matching circuit is put forward to enhance its performance in broadband frequencies. The typical multi-physics problem is coupled with sound wave equations, structure stress-strain equations, piezoelectric constitutive equations and electric ordinary equations, and it is analyzed with FEM in detail. Frequency response characteristics are simulated when shunted with negative-impedance in series. When proper negative synthesized elements are connected, the performance of low frequencies and bandwidth are enhanced obviously.

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