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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2005, Vol. 6 Issue ( 8): 15-    DOI: 10.1631/jzus.2005.A0997
    
SAW Reflection and Scattering by Electrodes
WANG Wei-biao, HAN Tao, ZHANG Xiao-dong, WU Hao-dong, SHUI Yong-an
State Key Laboratory of Modern Acoustics, Nanjing University, Nanjing 310093, China; Department of Instrumentation Engineering, Shanghai Jiao Tong University, Shanghai 200030, China
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Abstract  A rigorous analysis of surface acoustic wave (SAW) reflection and scattering by electrodes is of paramount importance in the design of SAW identification tags and sensors. In this paper, a new method based on Green’s function concept is used to study reflection and scattering coefficients. By this method the reflection coefficient with its phase angle, transmission coefficient, and bulk wave scattering coefficient, can be obtained rapidly and accurately. To get precise result, the influence of static charge must be taken into account. In the work, we successfully cancelled out the effect of static charge and the validity of the results was checked. As an example, the reflection, transmission and scattering coefficients of a single grounded electrode on 128° YX LiNbO3 is shown.

Key words： SAW reflection      SAW scattering      Green’s function     
Received: 10 January 2005     
CLC:  TU432  
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WANG Wei-biao
HAN Tao
ZHANG Xiao-dong
WU Hao-dong
SHUI Yong-an
Cite this article:

WANG Wei-biao, HAN Tao, ZHANG Xiao-dong, WU Hao-dong, SHUI Yong-an. SAW Reflection and Scattering by Electrodes. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2005, 6( 8): 15-.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.2005.A0997     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2005/V6/I 8/15

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