US-PCS SAW duplexer using high-Q SAW resonator with SiO/sub 2/ coat for stabilizing temperature characteristics

@article{Takayama2004USPCSSD,
  title={US-PCS SAW duplexer using high-Q SAW resonator with SiO/sub 2/ coat for stabilizing temperature characteristics},
  author={Ryosuke Takayama and Hidekazu Nakanishi and Yuzuru Iwasaki and T. Sakuragawa and Kenjiro Fujii},
  journal={IEEE Ultrasonics Symposium, 2004},
  year={2004},
  volume={2},
  pages={959-962 Vol.2}
}
We have successfully developed SAW resonators with a SiO/sub 2/ coat, which have both high-Q characteristics and stable temperature characteristics. We realized a SAW duplexer for the US PCS band (US-PCS) using these resonators. The frequency characteristics variation due to temperature change is usually taken into design consideration. However, in case of the US-PCS duplexer, which has a difficult frequency allocation for the transmission (Tx) band and the reception (Rx) band. A temperature… CONTINUE READING

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