Leaky surface acoustic wave (LSAW) devices on Al-electrode/36-48° YX-LiTaO3 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 LiTaO3 is proposed and compared with Al electrodes (0.1 λ)/42° YX-LiTaO3, which have been considered the best structure. We have been able to improve the characteristics of the LSAW.
ASJC Scopus subject areas
- Signal Processing
- Physics and Astronomy(all)
- Computer Networks and Communications
- Electrical and Electronic Engineering
- Applied Mathematics