Abstract
In this study, we carried out experimental research on the directivity of surface acoustic wave (SAW) filters with Al, W and Ta electrodes formed on langasite single-crystal wafers, in order to find electrode materials that make the natural unidirectionality disappear. The results proved that by using W and Ta, the natural unidirectionality disappears at the normalized thickness (h/λ) of 0.033-0.037. This suggests a potential application of these metals as electrode materials for langasite-based SAW filters so that the design process of the single-phase unidirectional transducer (SPUDT) filter can be simplified by using tools for conventional SPUDT filters.
| Original language | English |
|---|---|
| Pages (from-to) | 5710-5714 |
| Number of pages | 5 |
| Journal | Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers |
| Volume | 40 |
| Issue number | 9 B |
| DOIs | |
| Publication status | Published - 2001 Sep |
Keywords
- Electrode material
- Langasite
- NSPUDT
- SAW filter
ASJC Scopus subject areas
- Engineering(all)
- Physics and Astronomy(all)
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Wang, S. Q., Kimura, R., Yamaguchi, K., Harada, J., Uda, S., & Hasegawa, K. (2001). Effects of electrode materials on natural unidirectionality of langasite. Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, 40(9 B), 5710-5714. https://doi.org/10.1143/jjap.40.5710