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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Kadota, M. Nakao, T. Taniguchi, N. Takata, E. Mimura, M. Nishiyama, K. Hada, T. Komura, T. |
| Copyright Year | 2005 |
| Description | Author affiliation: Murata Manuf. Co. Ltd., Kyoto, Japan (Kadota, M.; Nakao, T.; Taniguchi, N.; Takata, E.; Mimura, M.; Nishiyama, K.; Hada, T.; Komura, T.) |
| Abstract | The pass-bands of a transmission (Tx) and a receiving (Rx) of the Personal Communication Services (PCS) Handy-phone in US are 1850-1910 MHz and 1930-1990 MHz, respectively. The transition bandwidth between the Tx and the Rx is very narrow as 20 MHz compared with other systems. A duplexer for the PCS using surface acoustic wave (SAW) requires a SAW substrate, which has a the good temperature stability, an optimum electromechanical coupling factor, and a large reflection coefficient. Some Rayleigh waves and leaky SAW (LSAW) on various substrate or structures have a good temperature characteristic, but almost all of them have not an optimum coupling factor and a large reflection coefficient for the US-PCS duplexer. In 2003, the authors reported a US-PCS SAW duplexer having good temperature stability, a steep frequency characteristic in transition band, a low loss, and a large out-of-band suppression. This paper describes the detail of the new substrate having the good temperature stability, the optimum electromechanical coupling factor, and sufficient reflection coefficient. |
| Starting Page | 1970 |
| Ending Page | 1975 |
| File Size | 1116777 |
| Page Count | 6 |
| File Format | |
| ISBN | 0780384121 |
| ISSN | 10510117 |
| DOI | 10.1109/ULTSYM.2004.1418219 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2004-08-23 |
| Publisher Place | Canada |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Surface acoustic waves Stability Personal communication networks Substrates Cutoff frequency Temperature distribution Filters Film bulk acoustic resonators Couplings Bandwidth |
| Content Type | Text |
| Resource Type | Article |
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