JPS6454805A - Surface acoustic wave resonator - Google Patents
Surface acoustic wave resonatorInfo
- Publication number
- JPS6454805A JPS6454805A JP21083587A JP21083587A JPS6454805A JP S6454805 A JPS6454805 A JP S6454805A JP 21083587 A JP21083587 A JP 21083587A JP 21083587 A JP21083587 A JP 21083587A JP S6454805 A JPS6454805 A JP S6454805A
- Authority
- JP
- Japan
- Prior art keywords
- length
- different
- resonators
- damping
- electrode fingers
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
Abstract
PURPOSE:To expand a band area capable of taking a large amount of damping quantity at a damping area, by connecting in series plural cavity type resonators in multi-stages having the same cycle length and the different crossing length of electrode fingers and the different length of the electrode fingers of a reflector at every stage. CONSTITUTION:The cycle length of interdigital electrode fingers 144, 148, 150, 152, 156, and 158 of interdigital transducers 100, 102, and 104 in the cavity type resonators A1-A3 are set equal with each other, and the crossing length of them and the length l1-l3 of the electrodes of the reflector are set different with each other at every stage of the resonators A1-A3, then, the interdigital transducers 100, 102, and 104 are connected in series in the multi-stages. In such a way, since the resonance frequencies of the resonators A1-A3 can be set equal with each other, it follows that an antiresonance frequency can be expanded and distributed without deteriorating the loss at the resonance frequency since each antiresonance frequency is different with each other. In such a way, it is possible to expand the band area capable of taking a large number of damping quantity at the damping area.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21083587A JPS6454805A (en) | 1987-08-25 | 1987-08-25 | Surface acoustic wave resonator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21083587A JPS6454805A (en) | 1987-08-25 | 1987-08-25 | Surface acoustic wave resonator |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6454805A true JPS6454805A (en) | 1989-03-02 |
Family
ID=16595900
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP21083587A Pending JPS6454805A (en) | 1987-08-25 | 1987-08-25 | Surface acoustic wave resonator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6454805A (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5374908A (en) * | 1992-11-25 | 1994-12-20 | Rf Monolithics, Inc. | Surface acoustic wave device for generating an output signal with only a symmetric or only an asymmetric vibration mode acoustic wave |
US5694096A (en) * | 1993-07-08 | 1997-12-02 | Murata Manufacturing Co., Ltd. | Surface acoustic wave filter |
US5699028A (en) * | 1994-05-11 | 1997-12-16 | Murata Manufacturing Co., Ltd. | Surface acoustic-wave resonator filter having shifted resonant frequencies |
US5770985A (en) * | 1993-07-08 | 1998-06-23 | Murata Manufacturing Co., Ltd. | Surface acoustic wave filter |
US6271739B1 (en) | 1996-05-28 | 2001-08-07 | Fujitsu Limited | Surface-acoustic-wave device having an improved pass-band characteristic and an improved degree of freedom for setting input and output impedances |
US6348845B2 (en) * | 1996-05-23 | 2002-02-19 | Matsushita Electric Industrial Co., Ltd. | Surface acoustic wave filter and multistage surface acoustic wave filter |
US6801100B2 (en) | 1996-05-23 | 2004-10-05 | Matsushita Electric Industrial Co., Ltd. | Inter-digital transducer, surface acoustic wave filter and communication apparatus using the same |
KR100609966B1 (en) * | 2001-04-18 | 2006-08-04 | 가부시키가이샤 무라타 세이사쿠쇼 | Surface acoustic wave filter apparatus and communication apparatus |
US7138890B2 (en) * | 2003-03-28 | 2006-11-21 | Matsushita Electric Industrial Co., Ltd. | Surface acoustic wave (SAW) resonator SAW filter and SAW antenna duplexer using the SAW resonator |
JP2016054374A (en) * | 2014-09-03 | 2016-04-14 | 株式会社村田製作所 | Variable resonant circuit and variable filter circuit |
US20160112030A1 (en) * | 2014-10-16 | 2016-04-21 | Taiyo Yuden Co., Ltd. | Acoustic wave device, filter, and duplexer |
-
1987
- 1987-08-25 JP JP21083587A patent/JPS6454805A/en active Pending
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5374908A (en) * | 1992-11-25 | 1994-12-20 | Rf Monolithics, Inc. | Surface acoustic wave device for generating an output signal with only a symmetric or only an asymmetric vibration mode acoustic wave |
US5694096A (en) * | 1993-07-08 | 1997-12-02 | Murata Manufacturing Co., Ltd. | Surface acoustic wave filter |
US5770985A (en) * | 1993-07-08 | 1998-06-23 | Murata Manufacturing Co., Ltd. | Surface acoustic wave filter |
US5699028A (en) * | 1994-05-11 | 1997-12-16 | Murata Manufacturing Co., Ltd. | Surface acoustic-wave resonator filter having shifted resonant frequencies |
US6348845B2 (en) * | 1996-05-23 | 2002-02-19 | Matsushita Electric Industrial Co., Ltd. | Surface acoustic wave filter and multistage surface acoustic wave filter |
US6801100B2 (en) | 1996-05-23 | 2004-10-05 | Matsushita Electric Industrial Co., Ltd. | Inter-digital transducer, surface acoustic wave filter and communication apparatus using the same |
US6271739B1 (en) | 1996-05-28 | 2001-08-07 | Fujitsu Limited | Surface-acoustic-wave device having an improved pass-band characteristic and an improved degree of freedom for setting input and output impedances |
KR100609966B1 (en) * | 2001-04-18 | 2006-08-04 | 가부시키가이샤 무라타 세이사쿠쇼 | Surface acoustic wave filter apparatus and communication apparatus |
US7138890B2 (en) * | 2003-03-28 | 2006-11-21 | Matsushita Electric Industrial Co., Ltd. | Surface acoustic wave (SAW) resonator SAW filter and SAW antenna duplexer using the SAW resonator |
JP2016054374A (en) * | 2014-09-03 | 2016-04-14 | 株式会社村田製作所 | Variable resonant circuit and variable filter circuit |
US20160112030A1 (en) * | 2014-10-16 | 2016-04-21 | Taiyo Yuden Co., Ltd. | Acoustic wave device, filter, and duplexer |
US10097158B2 (en) * | 2014-10-16 | 2018-10-09 | Taiyo Yuden Co., Ltd. | Acoustic wave device, filter, and duplexer |
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