Surface acoustic wave characteristics on zno/yz·linbo3 structure and their application to elastic convolver

Michio Kadota, Kunio Minami

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

In an effort to improve the efficiency of an elastic convolver, we discussed ways to increase the electromechanical coupling factor of the LiNbO3 (LN)substrate. We examined, both theoretically and experimentally, the surface acoustic wave (SAW) characteristics of ZnO films formed on the +Y·and -Y·planes of the YZ·LN substrates. As a result, it was clear that a larger electromechanical coupling factor, ks, can be obtained with a ZnO film on the +Y·plane than on the -Y·plane of YZ·LN substrates. The maximum value of the coupling factor obtained was 0.32, which was 2.04 times the square (ks2) of the value obtained without the ZnO film. By applying the LN substrate with the ZnO film on its +Y·plane to the elastic convolver, we obtained a processing time of 7.6°µs, a 3°dB bandwidth of 44°MHz and an efficiency of -58°dBm.

Original languageEnglish
Pages (from-to)2698-2701
Number of pages4
JournalJapanese journal of applied physics
Volume34
Issue number5S
DOIs
Publication statusPublished - 1995 May

Keywords

  • + Y·plane
  • Convolver
  • Coupling factor
  • SAW
  • YZ-Li NbO
  • ZnO
  • — Y·plane

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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