JP2006340195A - 弾性表面波デバイス - Google Patents
弾性表面波デバイス Download PDFInfo
- Publication number
- JP2006340195A JP2006340195A JP2005164396A JP2005164396A JP2006340195A JP 2006340195 A JP2006340195 A JP 2006340195A JP 2005164396 A JP2005164396 A JP 2005164396A JP 2005164396 A JP2005164396 A JP 2005164396A JP 2006340195 A JP2006340195 A JP 2006340195A
- Authority
- JP
- Japan
- Prior art keywords
- idt electrodes
- direct wave
- piezoelectric substrate
- distance
- idt
- 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.)
- Withdrawn
Links
Images
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/02535—Details of surface acoustic wave devices
- H03H9/02818—Means for compensation or elimination of undesirable effects
- H03H9/02874—Means for compensation or elimination of undesirable effects of direct coupling between input and output transducers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/02535—Details of surface acoustic wave devices
- H03H9/02637—Details concerning reflective or coupling arrays
- H03H9/02779—Continuous surface reflective arrays
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/46—Filters
- H03H9/64—Filters using surface acoustic waves
- H03H9/6489—Compensation of undesirable effects
- H03H9/6496—Reducing ripple in transfer characteristic
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
Abstract
【解決手段】圧電基板1の主面上にIDT電極2、3を所定の間隔をあけて配置し、中心周波数をfo(Hz)、IDT電極2、3の交差長をW(mm)、IDT電極2、3間の距離をD(mm)とした時、0<(W/D)×fo/109≦0.6に設定する。
【選択図】 図6
Description
2:IDT電極
3:IDT電極
4:シールド電極
5:吸音材
Claims (2)
- 圧電基板上に少なくとも2つのIDT電極を所定の間隔をあけて配置した弾性表面波デバイスにおいて、中心周波数をfo(Hz)、IDT電極の交差長をW(mm)、IDT電極間の距離をD(mm)とした時、0<(W/D)×fo/109≦0.6とすることを特徴とした弾性表面波デバイス。
- 前記圧電基板はタンタル酸リチウム、又はニオブ酸リチウムであることを特徴とした請求項1に記載の弾性表面波デバイス。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005164396A JP2006340195A (ja) | 2005-06-03 | 2005-06-03 | 弾性表面波デバイス |
US11/445,256 US20070001785A1 (en) | 2005-06-03 | 2006-06-02 | Surface acoustic wave device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005164396A JP2006340195A (ja) | 2005-06-03 | 2005-06-03 | 弾性表面波デバイス |
Publications (1)
Publication Number | Publication Date |
---|---|
JP2006340195A true JP2006340195A (ja) | 2006-12-14 |
Family
ID=37560318
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2005164396A Withdrawn JP2006340195A (ja) | 2005-06-03 | 2005-06-03 | 弾性表面波デバイス |
Country Status (2)
Country | Link |
---|---|
US (1) | US20070001785A1 (ja) |
JP (1) | JP2006340195A (ja) |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS519648A (ja) * | 1974-07-15 | 1976-01-26 | Nippon Telegraph & Telephone | |
JPS598417A (ja) * | 1982-07-06 | 1984-01-17 | Clarion Co Ltd | 弾性表面波装置 |
DE19610806A1 (de) * | 1995-03-20 | 1996-10-10 | Hitachi Media Electron Kk | Oberflächenwellen-Filter und Antennenweiche |
JP2001196898A (ja) * | 2000-01-05 | 2001-07-19 | Fujitsu Ltd | 弾性表面波フィルタ |
-
2005
- 2005-06-03 JP JP2005164396A patent/JP2006340195A/ja not_active Withdrawn
-
2006
- 2006-06-02 US US11/445,256 patent/US20070001785A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
US20070001785A1 (en) | 2007-01-04 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6791403B2 (ja) | マルチプレクサ、高周波フロントエンド回路および通信装置 | |
JP4727322B2 (ja) | 弾性表面波装置 | |
JP3827232B2 (ja) | フィルタ装置およびそれを用いた分波器 | |
US20080007139A1 (en) | Piezoelectric thin-film filter | |
JP2000261288A (ja) | 弾性表面波フィルタ、デュプレクサ、通信機装置 | |
JP6634973B2 (ja) | 弾性表面波フィルタ、デュプレクサおよびマルチプレクサ | |
JP5810113B2 (ja) | 弾性波共振器とこれを用いた弾性波フィルタおよびアンテナ共用器 | |
US6292071B1 (en) | Surface acoustic wave filter for improving flatness of a pass band and a method of manufacturing thereof | |
US10574211B2 (en) | Composite filter device | |
JP3745847B2 (ja) | 二重モードsawフィルタの構造 | |
EP0763889B1 (en) | Surface acoustic wave filter | |
US20080258846A1 (en) | Elastic wave filter | |
KR19980019102A (ko) | 탄성표면파 공진자 필터(Surface acoustic wave resonator filter) | |
WO2021015187A1 (ja) | 弾性波フィルタ | |
JP4995923B2 (ja) | 弾性境界波デバイス、およびそれを用いた通信機 | |
JP2006340195A (ja) | 弾性表面波デバイス | |
JP2005203996A (ja) | トランスバーサルsawフィルタ | |
WO2021060153A1 (ja) | 弾性波装置、フィルタ装置及びマルチプレクサ | |
US6781282B1 (en) | Longitudinally coupled resonator-type surface acoustic wave device | |
WO2022091582A1 (ja) | 弾性波フィルタ | |
WO2021045031A1 (ja) | 弾性波フィルタ | |
JP2006157557A (ja) | 弾性表面波装置 | |
JP3456810B2 (ja) | 弾性表面波フィルタ | |
JP2000224003A (ja) | 縦結合二重モードsawフィルタ | |
JP4843862B2 (ja) | 弾性表面波装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20061114 |
|
RD03 | Notification of appointment of power of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7423 Effective date: 20061114 |
|
RD04 | Notification of resignation of power of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7424 Effective date: 20070403 |
|
A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20090422 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20090428 |
|
A761 | Written withdrawal of application |
Free format text: JAPANESE INTERMEDIATE CODE: A761 Effective date: 20090625 |