Surface acoustic wave duplexer composed of SiO2 film with convex and concave on co-electrodes/LiNbO3 structure

Yasuharu Nakai, Takeshi Nakao, Kenji Nishiyama, Michio Kadota

Research output: Contribution to journalConference articlepeer-review

4 Citations (Scopus)

Abstract

Authors have already realized 3.0×2.5×1.2 or 2.5×2.0×0.48mm3 size SAW duplexers for personal communication in US with an excellent temperature coefficient frequency (TCF) by using the Rayleigh wave on the SiO2/Cuelectrode/ 120°-128°YX-LiNbO3 and 36°-48°YX-LiTaO3 structures. time, authors intentionally attempted to make the portions on the SiO2 film over the gap of interdigital (IDTs). As the results, the calculated and measured showed the increase of the reflection coefficient and the of the TCF. In addition to them, the measured showed that a power durability have been drastically improved any deterioration in the frequency characteristics making the convex portions on the SiO2 film over the gap of IDTs.

Original languageEnglish
Article number4803206
Pages (from-to)1580-1583
Number of pages4
JournalProceedings - IEEE Ultrasonics Symposium
DOIs
Publication statusPublished - 2008 Dec 1
Event2008 IEEE International Ultrasonics Symposium, IUS 2008 - Beijing, China
Duration: 2008 Nov 22008 Nov 5

Keywords

  • Cu-electrode
  • Duplexer
  • PCS
  • SAW
  • TCF

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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