Chinese Science Bulletin

, 50:599 | Cite as

Wavelet transform element of SAW type

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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 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.

Keywords

surface acoustic wave (SAW) wavelet transform element interdigital transducer (IDT) 
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References

  1. 1.
    Wei Peiyong, Zhu Changchun, Liu Junhua, Implementing wavelet transform with SAW elements, Piezoelectrics & Acoustooptics (in Chinese), 2001, 23(3): 173–176.Google Scholar
  2. 2.
    Peng Yuhang, Wavelet Ttransform and its Engineering Application (in Chinese), Beijing: Sciece Preess, 1995, 5: 33–34.Google Scholar
  3. 3.
    Lu Wenke, Zhu Changchun, Liu Junhua et al., Implementing wavelet transform with SAW elements, Science in China, Series E, 2003, 46(6): 627–638.CrossRefGoogle Scholar
  4. 4.
    Lu Wenke, Zhu Changchun, Liu Junhua, Study of implemention of surface-acoustic-wave type of the wavelet-transformation and reconstruction element, Acta Electronica Sinica (in Chinese), 2002, 30(8): 1156–1159.Google Scholar
  5. 5.
    Wei Peiyong, Zhu Changchun, Liu Junhua, Method of implementing wavelet transform with SAW elements, Journal of Xi’an Jiaotong University (in Chinese), 2001, 35(4): 394–397.Google Scholar
  6. 6.
    Wei Peiyong, Zhu Changchun, Liu Junhua, Realization of wavelet transform using SAW devices, Semiconductor Photonics and Technology, 2001, 7(2): 104–107.Google Scholar
  7. 7.
    Wu Yili, SAW Principle & Its Appliction in Electron Technology (in Chinese), Beijing: National Defence Industry Publishing House, 1983, 8: 214–245Google Scholar
  8. 8.
    Liu Qinghong, Comprehensive design of SAW filter, Fire Control Radar Technology (in Chinese), 2002, 31(4): 38–43.Google Scholar
  9. 9.
    Lu Wenke, Study of implementing wavelet transform with SAW elements, Doctor Dissertation of Xi’an Jiaotong University, Xi’an, 2004, 4.Google Scholar
  10. 10.
    Kovacs, G., Anhorn, M., Engan, G. et al., Improved material constants for LiNbO3 and LiTaO3, IEEE Ultrason. Symp. Proc., 1990: 435–438.Google Scholar
  11. 11.
    Takahashi, S., Hirano, H., Kodama, T., SAW IF filter on LiTaO3 for color TV receivers, IEEE Trans. Consumer electron, 1978, CE-24, 3: 337–346.CrossRefGoogle Scholar
  12. 12.
    Ebata, Y., Sato, K., Morishita, S., A LiTaO3 SAW resonator and its application to video cassette recorder, IEEE Ultrason. Symp. Proc., 1981: 89–93.Google Scholar
  13. 13.
    Nakamura, K., Kazumi M., Shimizu, H., SH-type and Rayleightype surface wave on rotated Y-cut LiTaO3, Proc. IEEE Ultrason. Symp., 1985: 510–518.Google Scholar
  14. 14.
    Hashimoto, K. Yamaguchi, M., Kogo. H., Interaction of high-coupling leaky SAW with bulk waves under metallic-grating structure on 36°YX-LiTaO3, Proc. IEEE Ultrason. Symp., 1985: 16–21.Google Scholar
  15. 15.
    Kawachi, O., Endoh, G., Ueda, M., Optimum cut of LiTaO3 for high performance leaky surface acoustic wave filters, Proc. IEEE Ultrason. Symp., 1986: 71–76.Google Scholar
  16. 16.
    Hashimoto, K., Yamaguchi, M. Mineyoshi, S., Optimum leaky-SAW cut of LiTaO3 for minimized insertion loss devices, Proc. IEEE Ultrason. Symp., 1987: 245–254.Google Scholar
  17. 17.
    Plessky, V., Hartmann, C. S., Characteristics of leaky SAWs on 36°-LiTaO3 in periodic structures of heavy electrodes, Proc. IEEE Ultrason. Symp., 1993: 1239–1246.Google Scholar
  18. 18.
    Tancrel, R. H., Holland, M. G., Acoustic surface wave filters, Proc. IEEE, 1971, 59(2): 393–409.CrossRefGoogle Scholar

Copyright information

© Science in China Press 2005

Authors and Affiliations

  • Wenke Lu
    • 1
    • 2
  • Changchun Zhu
    • 2
  • Qinghong Liu
    • 2
  • Junhua Liu
    • 1
  1. 1.School of Electronics and Information EngineeringXi’an Jiaotong UniversityXi’anChina
  2. 2.School of Electronics and Information EngineeringDonghua UniversityShanghaiChina

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