KR100493215B1 - 탄성 표면파 필터 - Google Patents
탄성 표면파 필터 Download PDFInfo
- Publication number
- KR100493215B1 KR100493215B1 KR10-2002-0050751A KR20020050751A KR100493215B1 KR 100493215 B1 KR100493215 B1 KR 100493215B1 KR 20020050751 A KR20020050751 A KR 20020050751A KR 100493215 B1 KR100493215 B1 KR 100493215B1
- Authority
- KR
- South Korea
- Prior art keywords
- surface acoustic
- acoustic wave
- wave filter
- comb
- shaped electrode
- Prior art date
Links
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
- H03H9/0023—Balance-unbalance or balance-balance networks
- H03H9/0028—Balance-unbalance or balance-balance networks using surface acoustic wave devices
- H03H9/0047—Balance-unbalance or balance-balance networks using surface acoustic wave devices having two acoustic tracks
- H03H9/0066—Balance-unbalance or balance-balance networks using surface acoustic wave devices having two acoustic tracks being electrically parallel
- H03H9/0071—Balance-unbalance or balance-balance networks using surface acoustic wave devices having two acoustic tracks being electrically parallel the balanced terminals being on the same side of the tracks
-
- 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
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/0023—Balance-unbalance or balance-balance networks
- H03H9/0028—Balance-unbalance or balance-balance networks using surface acoustic wave devices
- H03H9/0033—Balance-unbalance or balance-balance networks using surface acoustic wave devices having one acoustic track only
- H03H9/0038—Balance-unbalance or balance-balance networks using surface acoustic wave devices having one acoustic track only the balanced terminals being on the same side of the track
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/0023—Balance-unbalance or balance-balance networks
- H03H9/0028—Balance-unbalance or balance-balance networks using surface acoustic wave devices
- H03H9/0033—Balance-unbalance or balance-balance networks using surface acoustic wave devices having one acoustic track only
- H03H9/0042—Balance-unbalance or balance-balance networks using surface acoustic wave devices having one acoustic track only the balanced terminals being on opposite sides of the track
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/0023—Balance-unbalance or balance-balance networks
- H03H9/0028—Balance-unbalance or balance-balance networks using surface acoustic wave devices
- H03H9/0047—Balance-unbalance or balance-balance networks using surface acoustic wave devices having two acoustic tracks
- H03H9/0052—Balance-unbalance or balance-balance networks using surface acoustic wave devices having two acoustic tracks being electrically cascaded
- H03H9/0061—Balance-unbalance or balance-balance networks using surface acoustic wave devices having two acoustic tracks being electrically cascaded the balanced terminals being on opposite sides of the tracks
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/0023—Balance-unbalance or balance-balance networks
- H03H9/0028—Balance-unbalance or balance-balance networks using surface acoustic wave devices
- H03H9/0085—Balance-unbalance or balance-balance networks using surface acoustic wave devices having four acoustic tracks
-
- 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
- H03H9/125—Driving means, e.g. electrodes, coils
- H03H9/145—Driving means, e.g. electrodes, coils for networks using surface acoustic waves
- H03H9/14544—Transducers of particular shape or position
- H03H9/14576—Transducers whereby only the last fingers have different characteristics with respect to the other fingers, e.g. different shape, thickness or material, split finger
- H03H9/14582—Transducers whereby only the last fingers have different characteristics with respect to the other fingers, e.g. different shape, thickness or material, split finger the last fingers having a different pitch
-
- 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
- H03H9/125—Driving means, e.g. electrodes, coils
- H03H9/145—Driving means, e.g. electrodes, coils for networks using surface acoustic waves
- H03H9/14544—Transducers of particular shape or position
- H03H9/14588—Horizontally-split transducers
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
Abstract
Description
Claims (6)
- 압전기판 상에, 3개의 빗형 전극부를 탄성 표면파의 전파 방향을 따라 가지는 종결합 공진자형 필터가 형성되고,상기 종결합 공진자형 필터에는 불평형 단자와 평형 단자가 형성되고,상기 3개의 빗형 전극부 중에서 적어도 하나는 위상이 다른 것과 다르도록 형성되고,상기 3개의 빗형 전극부를 양측으로부터 사이에 두도록 반사기가 각각 형성되고,상기 반사기는 접지되어 있는 것을 특징으로 하는 탄성 표면파 필터.
- 압전기판 상에, 3개의 빗형 전극부를 탄성 표면파의 전파 방향을 따라 가지는 종결합 공진자형 필터가 복수개 서로 조합하여 형성되고,상기 종결합 공진자형 필터에는 불평형 단자와 평형 단자가 형성되고,상기 3개의 빗형 전극부 중에서 적어도 하나는 위상이 다른 것과 다르도록 형성되고,상기 3개의 빗형 전극부를 양측으로부터 사이에 두도록 반사기가 각각 형성되고,상기 반사기는 접지되어 있는 것을 특징으로 하는 탄성 표면파 필터.
- 제 1항에 있어서, 종결합 공진자형 필터에 대하여, 직렬 및 병렬의 적어도 한 방향으로 탄성 표면파 공진자가 적어도 1개 접속되어 있는 것을 특징으로 하는 탄성 표면파 필터.
- 제 1항에 있어서, 반사기는 전극지를 20개에서 200개까지의 범위내에서 가지고 있는 것을 특징으로 하는 탄성 표면파 필터.
- 제 1항에 있어서, 반사기의 파장을 λR이라고 하면, 빗형 전극부와 반사기의 간격이 0.4λR에서 0.6λR까지의 범위 내에 설정되어 있는 것을 특징으로 하는 탄성 표면파 필터.
- 제 1항에 있어서, 종결합 공진자형 필터의 3개의 빗형 전극부 중, 중앙의 빗형 전극부를 사이에 두는 양측의 각 빗형 전극부가 서로 위상을 반전하도록 설정되어 있는 것을 특징으로 하는 탄성 표면파 필터.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JPJP-P-2001-00260147 | 2001-08-29 | ||
JP2001260147A JP2003069383A (ja) | 2001-08-29 | 2001-08-29 | 弾性表面波フィルタ |
Publications (2)
Publication Number | Publication Date |
---|---|
KR20030019132A KR20030019132A (ko) | 2003-03-06 |
KR100493215B1 true KR100493215B1 (ko) | 2005-06-03 |
Family
ID=19087391
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR10-2002-0050751A KR100493215B1 (ko) | 2001-08-29 | 2002-08-27 | 탄성 표면파 필터 |
Country Status (4)
Country | Link |
---|---|
US (1) | US6781485B2 (ko) |
JP (1) | JP2003069383A (ko) |
KR (1) | KR100493215B1 (ko) |
CN (1) | CN1185789C (ko) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1842961B (zh) * | 2004-07-23 | 2010-10-20 | 株式会社村田制作所 | 声表面波器件 |
JP4069917B2 (ja) | 2004-09-15 | 2008-04-02 | 株式会社村田製作所 | バランス型弾性表面波フィルタ |
KR100936896B1 (ko) * | 2004-10-22 | 2010-01-14 | 가부시키가이샤 무라타 세이사쿠쇼 | 밸런스형 탄성 표면파 필터 |
WO2006048999A1 (ja) * | 2004-11-04 | 2006-05-11 | Murata Manufacturing Co., Ltd. | バランス型sawフィルタ |
JPWO2006068087A1 (ja) | 2004-12-20 | 2008-06-12 | 株式会社村田製作所 | バランス型弾性波フィルタ装置 |
EP1701441B1 (en) | 2004-12-20 | 2013-04-17 | Murata Manufacturing Co., Ltd. | Balance type elastic wave filter device |
WO2006068086A1 (ja) * | 2004-12-24 | 2006-06-29 | Murata Manufacturing Co., Ltd. | バランス型sawフィルタ |
US7902716B2 (en) | 2005-10-27 | 2011-03-08 | Kyocera Corporation | Surface acoustic wave device and communication apparatus |
US7579928B2 (en) * | 2006-04-03 | 2009-08-25 | Kyocera Corporation | Surface acoustic wave device and communication device |
CN101411061A (zh) * | 2006-04-06 | 2009-04-15 | 株式会社村田制作所 | 双工器 |
JP5121178B2 (ja) * | 2006-07-24 | 2013-01-16 | 京セラ株式会社 | 弾性表面波装置及び通信装置 |
WO2009001651A1 (ja) * | 2007-06-28 | 2008-12-31 | Kyocera Corporation | 弾性表面波装置及び通信装置 |
US8427258B2 (en) * | 2007-07-26 | 2013-04-23 | Kyocera Corporation | Surface acoustic wave device and communication device |
JP2011087282A (ja) * | 2009-09-15 | 2011-04-28 | Murata Mfg Co Ltd | 弾性境界波フィルタ及びそれを備える分波器 |
WO2011077773A1 (ja) * | 2009-12-25 | 2011-06-30 | 株式会社村田製作所 | 分波器 |
US8610518B1 (en) | 2011-05-18 | 2013-12-17 | Triquint Semiconductor, Inc. | Elastic guided wave coupling resonator filter and associated manufacturing |
US10461720B2 (en) | 2017-09-21 | 2019-10-29 | Snaptrack, Inc. | Acoustic filter |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5179310A (en) * | 1990-03-19 | 1993-01-12 | Fujitsu Limited | Surface-acoustic-waver filter having a plurality of electrodes |
JPH10233646A (ja) * | 1997-02-18 | 1998-09-02 | Matsushita Electric Ind Co Ltd | Sawフィルタ |
JPH10242796A (ja) * | 1997-02-25 | 1998-09-11 | Toyo Commun Equip Co Ltd | 多重モードsawフィルタ |
JPH10294644A (ja) * | 1997-04-18 | 1998-11-04 | Toyo Commun Equip Co Ltd | 有極型弾性表面波フィルタ |
JP2000004142A (ja) * | 1998-06-12 | 2000-01-07 | Toyo Commun Equip Co Ltd | 平衡型横結合sawフィルタ |
JP2000049568A (ja) * | 1998-05-27 | 2000-02-18 | Toshiba Corp | 弾性表面波フィルタ |
JP2000201048A (ja) * | 1999-01-08 | 2000-07-18 | Toyo Commun Equip Co Ltd | 弾性表面波フィルタ |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3254779B2 (ja) * | 1993-01-05 | 2002-02-12 | 株式会社村田製作所 | 多電極形弾性表面波装置 |
JPH09205342A (ja) | 1996-01-26 | 1997-08-05 | Matsushita Electric Ind Co Ltd | 弾性表面波フィルタ |
US6255915B1 (en) * | 1999-05-10 | 2001-07-03 | Research In Motion Limited | Differential surface acoustic wave filter having balanced outputs |
US6720842B2 (en) * | 2000-02-14 | 2004-04-13 | Murata Manufacturing Co., Ltd. | Surface acoustic wave filter device having first through third surface acoustic wave filter elements |
JP3391347B2 (ja) * | 2000-06-26 | 2003-03-31 | 株式会社村田製作所 | 縦結合共振子型弾性表面波フィルタ |
JP3687566B2 (ja) * | 2000-07-25 | 2005-08-24 | 株式会社村田製作所 | 縦結合共振子型弾性表面波フィルタ |
JP2003060484A (ja) * | 2001-08-14 | 2003-02-28 | Murata Mfg Co Ltd | 弾性表面波装置 |
US7123728B2 (en) * | 2001-08-15 | 2006-10-17 | Apple Computer, Inc. | Speaker equalization tool |
-
2001
- 2001-08-29 JP JP2001260147A patent/JP2003069383A/ja active Pending
-
2002
- 2002-08-27 KR KR10-2002-0050751A patent/KR100493215B1/ko active IP Right Grant
- 2002-08-29 CN CNB021319839A patent/CN1185789C/zh not_active Expired - Lifetime
- 2002-08-29 US US10/230,061 patent/US6781485B2/en not_active Expired - Lifetime
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5179310A (en) * | 1990-03-19 | 1993-01-12 | Fujitsu Limited | Surface-acoustic-waver filter having a plurality of electrodes |
JPH10233646A (ja) * | 1997-02-18 | 1998-09-02 | Matsushita Electric Ind Co Ltd | Sawフィルタ |
JPH10242796A (ja) * | 1997-02-25 | 1998-09-11 | Toyo Commun Equip Co Ltd | 多重モードsawフィルタ |
JPH10294644A (ja) * | 1997-04-18 | 1998-11-04 | Toyo Commun Equip Co Ltd | 有極型弾性表面波フィルタ |
JP2000049568A (ja) * | 1998-05-27 | 2000-02-18 | Toshiba Corp | 弾性表面波フィルタ |
JP2000004142A (ja) * | 1998-06-12 | 2000-01-07 | Toyo Commun Equip Co Ltd | 平衡型横結合sawフィルタ |
JP2000201048A (ja) * | 1999-01-08 | 2000-07-18 | Toyo Commun Equip Co Ltd | 弾性表面波フィルタ |
Also Published As
Publication number | Publication date |
---|---|
US20030042999A1 (en) | 2003-03-06 |
JP2003069383A (ja) | 2003-03-07 |
US6781485B2 (en) | 2004-08-24 |
CN1404221A (zh) | 2003-03-19 |
CN1185789C (zh) | 2005-01-19 |
KR20030019132A (ko) | 2003-03-06 |
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