| Wavelet transform element of SAW type |
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| 作者姓名： | LUWenke ZHUChangchun LIUQinghong LIUJunhua |
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| 作者单位： | [1]SchoolofElectronicsandInformationEngineering,DonghuaUniversity,Shanghai200051,China [2]SchoolofElectronicsandInformationEngineering,Xi＇anJiaotongUniversity,Xi＇an710049,China／／SchoolofElectronicsandInformationEngineering,DonghuaUniversity,Shanghai200051,China [3]SchoolofElectronicsandInformationEngineering,Xi＇anJiaotongUniversity,Xi＇an710049,China |
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| 摘 要： | This paper proposes to use substrate materials of small electromechanical coupling coefficient k^2 (such as X-112YLiTaO3) to manufacture wavelet transform element of SAW type so as to reduce finger reflections, i.e. to reduce the error of wavelet transform element of SAW type. And it is concluded that the smaller the center frequency of the transmitting IDT of wavelet type, the smaller the error. We suggest to choose substrate material with electromechanical coupling coefficient smaller than that of X-112Y LiTaO3 in the manufacture of the transmitting IDTs of wavelet type and the receiving IDTs at center frequencies above 100MHz, so as to reduce the errors of the transmitting IDTs of wavelet type and the receiving IDTs at center frequencies above 100MHz.
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| 关 键 词： | 微波传输模式 声波 SAW 交叉指型传感器 IDT 计算方法 |
| 收稿时间： | 21 August 2004 |
Wavelet transform element of SAW type |
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| LUWenke ZHUChangchun LIUQinghong LIUJunhua.Wavelet transform element of SAW type[J].Chinese Science Bulletin,2005,50(6):599-602. |
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| Authors: | Wenke Lu Changchun Zhu Qinghong Liu Junhua Liu |
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| Institution: | (1) School of Electronics and Information Engineering, Xi’an Jiaotong University, 710049 Xi’an, China;(2) School of Electronics and Information Engineering, Donghua University, 200051 Shanghai, China |
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| Abstract: | This paper proposes to use substrate materials of small electromechanical coupling coefficient k2 (such as X-112YLiTaO3) to manufacture wavelet transform element of SAW type so as to reduce finger reflections, i.e. to reduce the error of wavelet transform element of SAW type. And it is concluded that the smaller the center frequency of the transmitting IDT of wavelet type, the smaller the error. We suggest to choose substrate material with electromechanica coupling coefficient smaller than that of X-112Y LiTaO3 in the manufacture of the transmitting IDTs of wavelet type and the receiving IDTs at center frequencies above 100MHZ, so as to reduce the errors of the transmitting IDTs of wavelet type and the receiving IDTs at center frequencies above 100MHZ. |
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| Keywords: | surface acoustic wave (SAW) wavelet transform element interdigital transducer (IDT) |
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