Improvement of Characteristics of Leaky Surface Acoustic Wave on LiTaO(3)

Leaky surface acoustic wave (LSAW) devices on Al-electrode/36-48 degree YX-LiTaO(3) substrates have seen wide use as filters and duplexers in cell phones because they possess a suitable electromechanical coupling factor and reflection coefficient, and a good Q factor for cell phones. In this paper,...

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Bibliographic Details
Published in:Electronics and communications in Japan 2013-02, Vol.96 (2), p.25-31
Main Authors: Kimura, Tetsuya, Kadota, Michio, Ida, Yasuyuki
Format: Article
Language:English
Subjects:
Aluminum
Cell phones
Duplexers
Electrodes
Electronics
Q factors
Reflection coefficient
Surface acoustic waves
Online Access:Get full text
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Summary:Leaky surface acoustic wave (LSAW) devices on Al-electrode/36-48 degree YX-LiTaO(3) substrates have seen wide use as filters and duplexers in cell phones because they possess a suitable electromechanical coupling factor and reflection coefficient, and a good Q factor for cell phones. In this paper, a new LSAW structure consisting of upper Al electrodes stacked on lower grooved Cu electrodes in Li-TaO(3) is proposed and compared with Al electrodes (0.1 lambda )/42 degree YX-LiTaO(3), which have been considered the best structure. We have been able to improve the characteristics of the LSAW.
ISSN:1942-9533
DOI:10.1002/ecj.10409