Surface Acoustic Wave Filter Using Floating Electrode Slanted Finger Unidirectional Transducers
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概要
- 論文の詳細を見る
This paper describes a wide-band surface acoustic wave(SAW)filter designed to achieve large stop-band attenuation. The SAW filters using slanted finger interdigital transducers are suitable for mid- or wide-band filters. To achieve a stop-band attenuation of more than 80 dB, two SAW filters using slanted finger unidirectional transducers(SFUDTs)were cascaded. Since these SFUDT filters have center-to-center distances that differ by one-fourth of the acoustic wavelength at the center frequency, the triple transit echo was effectively compensated. A cascaded-pair SFUDT SAW filter with a fractional bandwidth of 15 percent was designed and fabricated on a 128°Y-X LiNbO_3 substrate. An insertion loss of 14dB, amplitude ripples of 0.5 dB and stop-band attenuation of 80 dB or more were achieved.
- 社団法人応用物理学会の論文
- 2000-05-30
著者
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YAMANOUCHI Kazuhiko
Tohoku Institute of Technology
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Yatsuda Hiromi
Japan Radio Co. Ltd.
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NOGUCHI Kennichi
Japan Radio Co. , Ltd.
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Noguchi K
Japan Radio Co. Ltd.
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Yatsuda Hiromi
Japan Radio Co. , Ltd.
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