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- Title
Considerations for dynamic temperature compensation of wideband ladder-type SAW filter.
- Authors
Nakamura, Nobuyuki; Komatsu, Tomoya; Omori, Tatsuya; Hashimoto, KenYa; Yamaguchi, Masatsune
- Abstract
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
- Subjects
WAVEGUIDE filters; ACOUSTIC surface waves; ACOUSTIC surface wave devices; BANDWIDTHS; ELECTRIC resonators; RADIO frequency linear accelerator; CAPACITORS; STRUCTURAL dynamics
- Publication
Electronics & Communications in Japan, 2013, Vol 96, Issue 4, p61
- ISSN
1942-9533
- Publication type
Article
- DOI
10.1002/ecj.10420