Considerations for dynamic temperature compensation of wideband ladder-type SAW filter
| Autor: | Tomoya Komatsu, Nobuyuki Nakamura, Masatsune Yamaguchi, Ken-ya Hashimoto, Tatsuya Omori |
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| Rok vydání: | 2013 |
| Předmět: |
Voltage-controlled filter
Engineering Materials science Computer Networks and Communications business.industry Acoustics Applied Mathematics Bandwidth (signal processing) Surface acoustic wave Electrical engineering General Physics and Astronomy law.invention Capacitor Resonator Filter (video) law Signal Processing Electronic engineering Insertion loss Mobile telephony Electrical and Electronic Engineering Wideband business Active filter Electronic filter |
| Zdroj: | Electronics and Communications in Japan. 96:61-66 |
| ISSN: | 1942-9533 |
| Popis: | Because of their excellent features such as small size, wide bandwidth, and low insertion loss, ladder-type filters based on surface acoustic wave (SAW) technology have been widely used as radio-frequency (RF) filters in mobile communications. We can realize wide bandwidth and low insertion loss in ladder-type SAW filters on a Cu-grating/15°LiNbO3 substrate structure. On the other hand, it is said that wide-bandwidth filters have poor temperature characteristics. Therefore, this paper discusses dynamic temperature compensation for wideband ladder-type SAW filters. First, we investigate how wide tunability is achievable using variable capacitors connected in parallel and/or series to SAW resonators in the filter configuration. Second, we measured the temperature characteristics of the resonator. Finally, we simulated temperature compensation in wideband ladder-type SAW filters. As a result, we were able to compensate the change of the characteristics with the ladder-type SAW filter connected using variable capacitors. © 2013 Wiley Periodicals, Inc. Electron Comm Jpn, 96(4): 61–66, 2013; Published online in Wiley Online Library (wileyonlinelibrary.com). DOI 10.1002/ecj.10420 |
| Databáze: | OpenAIRE |
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