Study of Insertion Loss for Wavelet Transform Element of New SAW Type

LU Wen-ke; ZHU Chang-chun; LIU Jun-hua; FANG Jian-an; WEN Chang-bao

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Study of Insertion Loss for Wavelet Transform Element of New SAW Type

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- Study of Insertion Loss for Wavelet Transform Element of New SAW Type
- Acta Electronica Sinica Vol. 34, Issue 2, Pages: 371-373(2006)
- 作者机构：
  
  1. 东华大学信息科学与技术学院,上海,200051
  2. 西安交通大学电子与信息工程学院,陕西,西安,710049
  3. 东华大学信息科学与技术学院上海,200051
  4. 西安交通大学电子与信息工程学院陕西西安,710049
- 作者简介：
- 基金信息：
- DOI：
  CLC： O426.9O29
- Published Online：25 February 2006，
  
  Published：2006
- 稿件说明：
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LU Wen-ke, ZHU Chang-chun, LIU Jun-hua, et al. Study of Insertion Loss for Wavelet Transform Element of New SAW Type[J]. Acta Electronica Sinica, 2006, 34(2): 371-373.
DOI：

LU Wen-ke, ZHU Chang-chun, LIU Jun-hua, et al. Study of Insertion Loss for Wavelet Transform Element of New SAW Type[J]. Acta Electronica Sinica, 2006, 34(2): 371-373. DOI：

摘要

小波式叉指换能器使用机电耦合系数比较大的基片(如YZ-LiNbO

基片)时

其频率特性曲线不光滑

但插入损耗小;小波式叉指换能器使用机电耦合系数比较小的基片(如X 112°Y-LiTaO

基片)时

其频率特性曲线光滑

但插入损耗大.声表面波器件的指条对数

越少

其带宽 Δ

f/f

越大

插入损耗越大

所以

指条对数

要取的合适

不宜过少.在声表面波式小波变换器件中

发射叉指换能器的条对数

取57

接收叉指换能器的指条对数是57的四分之一到三分之一之间.

Abstract

If the substrate of larger electromechanical coupling coefficient (such as YZ－LiNbO

substrate) is used for wavelet type of interdigital transducer (IDT)

its frequency characteristic curve is not smooth

but its insertion loss is smaller.If the substrate of smaller electromechanical coupling coefficient (such as X 112°Y－LiTaO

substrate) is used for wavelet type of IDT

its frequency characteristic curve is smooth

but its insertion loss is larger.The less the finger pairs

of surface acoustic wave (SAW) element

the larger its bandwidth Δ

f/f

and the larger its insertion loss

so the finger pairs

is appropriately taken

and is not too small.In wavelet transform element of SAW type

the finger pairs N of the transmitting IDT is 57

the finger pairs N of the receiving

IDT is between one-fourth of 57 and one-third of 57.

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Related Author

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WEI Wen-ting

WANG Ling

GU Hua-xi

WEN Chang-bao

FANG Jian-an

LIU Jun-hua

LIU Qing-hong

Related Institution

State Key Laboratory of Integrated Service Networks, Xidian University

School of Electronics and Information Engineering,Xi’an Jiaotong University

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School of Electronics and Information EngineeringXi’an Jiaotong UniversityXi’anShaanxi 710049China

Information Engineering College,Dalian Maritime University

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