JP5458738B2 - 弾性表面波装置 - Google Patents
弾性表面波装置 Download PDFInfo
- Publication number
- JP5458738B2 JP5458738B2 JP2009189769A JP2009189769A JP5458738B2 JP 5458738 B2 JP5458738 B2 JP 5458738B2 JP 2009189769 A JP2009189769 A JP 2009189769A JP 2009189769 A JP2009189769 A JP 2009189769A JP 5458738 B2 JP5458738 B2 JP 5458738B2
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- Prior art keywords
- acoustic wave
- surface acoustic
- resonator
- wave resonator
- capacitive coupling
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- 238000010897 surface acoustic wave method Methods 0.000 title claims description 169
- 230000008878 coupling Effects 0.000 claims description 35
- 238000010168 coupling process Methods 0.000 claims description 35
- 238000005859 coupling reaction Methods 0.000 claims description 35
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 239000000758 substrate Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 description 8
- 239000003990 capacitor Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000003071 parasitic effect Effects 0.000 description 2
- 230000001413 cellular effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
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- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
Description
12 不平衡信号端子
13 第1の平衡信号端子
14 第2の平衡信号端子
16、29、30 縦結合共振子型弾性表面波素子
17、28 弾性表面波フィルタ部
18 第1の弾性表面波共振子
19 第2の弾性表面波共振子
20 第3の弾性表面波共振子
21 第4の弾性表面波共振子
22、23 平衡入出力
24、25 接続部
27 容量結合部
Claims (3)
- 圧電基板と、この圧電基板の表面において、平衡−不平衡変換機能を有するとともに一端を不平衡信号端子に接続し、かつ縦結合共振子型弾性表面波素子を用いた弾性表面波フィルタ部と、この弾性表面波フィルタ部の平衡入出力の一方と第1の平衡信号端子との間に順次直列に接続した第1と第2の弾性表面波共振子と、前記弾性表面波フィルタ部の平衡入出力の他方と第2の平衡信号端子との間に順次直列に接続した第3と第4の弾性表面波共振子とを備え、前記第1の弾性表面波共振子と前記第2の弾性表面波共振子の接続部と、前記第3の弾性表面波共振子と前記第4の弾性表面波共振子の接続部との間に容量結合部を設け、前記容量結合部を前記第2の弾性表面波共振子と前記第4の弾性表面波共振子との間に配置した弾性表面波装置。
- 前記第1の弾性表面波共振子の反共振周波数を前記第2の弾性表面波共振子の反共振周波数よりも低くし、かつ前記第3の弾性表面波共振子の反共振周波数を前記第4の弾性表面波共振子の反共振周波数よりも低くした請求項1記載の弾性表面波装置。
- 前記容量結合部をくし型電極により構成した請求項1記載の弾性表面波装置。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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JP2009189769A JP5458738B2 (ja) | 2009-08-19 | 2009-08-19 | 弾性表面波装置 |
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JP2009189769A JP5458738B2 (ja) | 2009-08-19 | 2009-08-19 | 弾性表面波装置 |
Publications (2)
Publication Number | Publication Date |
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JP2011044765A JP2011044765A (ja) | 2011-03-03 |
JP5458738B2 true JP5458738B2 (ja) | 2014-04-02 |
Family
ID=43831896
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JP2009189769A Active JP5458738B2 (ja) | 2009-08-19 | 2009-08-19 | 弾性表面波装置 |
Country Status (1)
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JP (1) | JP5458738B2 (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2773039A4 (en) * | 2011-10-24 | 2015-07-08 | Murata Manufacturing Co | ELASTIC WAVE DEMULTIPLEXER |
CN204615783U (zh) * | 2012-08-29 | 2015-09-02 | 株式会社村田制作所 | 弹性波装置以及滤波器装置 |
JP6465065B2 (ja) * | 2016-04-25 | 2019-02-06 | 株式会社村田製作所 | 弾性波装置 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3139225B2 (ja) * | 1993-07-08 | 2001-02-26 | 株式会社村田製作所 | 弾性表面波フィルタ |
JPH09153753A (ja) * | 1995-11-28 | 1997-06-10 | Hitachi Ltd | 弾性表面波装置およびそれを用いたアンテナ分波器 |
JP3520413B2 (ja) * | 2000-02-14 | 2004-04-19 | 株式会社村田製作所 | 弾性表面波フィルタ装置 |
JP2002064358A (ja) * | 2000-08-21 | 2002-02-28 | Toyo Commun Equip Co Ltd | 複合弾性表面波フィルタ |
JP3928534B2 (ja) * | 2002-02-28 | 2007-06-13 | 株式会社村田製作所 | 弾性表面波フィルタ |
DE102006010752B4 (de) * | 2006-03-08 | 2013-10-31 | Epcos Ag | DMS-Filter mit verschalteten Resonatoren |
JP5094074B2 (ja) * | 2006-07-27 | 2012-12-12 | 京セラ株式会社 | 弾性表面波素子及び弾性表面波装置 |
DE112008002521B4 (de) * | 2007-10-01 | 2015-03-26 | Murata Manufacturing Co., Ltd. | Oberflächenschallwellenfiltervorrichtung |
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- 2009-08-19 JP JP2009189769A patent/JP5458738B2/ja active Active
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