KR20020075307A - 탄성 표면파 필터와 이를 사용한 탄성 표면파 장치 및 이필터 또는 이 장치를 사용한 통신 장치 - Google Patents
탄성 표면파 필터와 이를 사용한 탄성 표면파 장치 및 이필터 또는 이 장치를 사용한 통신 장치 Download PDFInfo
- Publication number
- KR20020075307A KR20020075307A KR1020020015843A KR20020015843A KR20020075307A KR 20020075307 A KR20020075307 A KR 20020075307A KR 1020020015843 A KR1020020015843 A KR 1020020015843A KR 20020015843 A KR20020015843 A KR 20020015843A KR 20020075307 A KR20020075307 A KR 20020075307A
- Authority
- KR
- South Korea
- Prior art keywords
- acoustic wave
- surface acoustic
- wave filter
- electrode
- longitudinally coupled
- Prior art date
Links
- 238000010897 surface acoustic wave method Methods 0.000 title claims abstract description 126
- 238000006243 chemical reaction Methods 0.000 claims abstract description 17
- 239000000758 substrate Substances 0.000 claims abstract description 9
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 230000000644 propagated effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 6
- 229910013641 LiNbO 3 Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000001413 cellular effect Effects 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000614 phase inversion technique Methods 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
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
- H03H9/46—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
- H03H9/46—Filters
- H03H9/64—Filters using surface acoustic waves
- H03H9/6423—Means for obtaining a particular transfer characteristic
- H03H9/6433—Coupled resonator filters
- H03H9/6436—Coupled resonator filters having one acoustic track only
-
- 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
- H03H9/0066—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
- H03H9/02—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
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
Abstract
Description
Claims (6)
- 압전 기판과,탄성 표면파 전파되는 방향을 따라 상기 압전 기판에 정렬된 적어도 두 개의 인터디지탈 트랜스듀서들을 포함하고,적어도 하나의 인터디지탈 트랜스듀서가 다른 인터디지탈 트랜스듀서에 인접하는 종단에서 소형 피치 전극지 부분이 제공되고, 상기 소형 피치 전극지 부분은 상기 적어도 하나의 인터디지탈 트랜스듀서에서 다른 전극지보다 작은 크기의 전극지들을 가지고,상기 소형 피치 전극지 부분은 전극이 반전되는 적어도 한 위치에서 두 개의 인접하는 전극지들을 포함하여 두 개의 인접하는 전극지들의 극성들이 같도록 만들어지는 것을 특징으로 하는 종결합 공진기형 탄성 표면파 필터.
- 제1항에 있어서, 상기 위치는 상기 전극 반전이 상기 소형 피치 전극지 부분의 실질적으로 중앙에서 수행되는 위치인 것을 특징으로 하는 종결합 공진기형 탄성 표면파 필터.
- 제1항에 있어서, 상기 전극 반전은 상기 탄성 표면파 필터의 중앙에 대해 대칭적으로 수행되는 것을 특징으로 하는 종결합 공진기형 탄성 표면파 필터.
- 제1항에 있어서, 상기 인접하는 인터디지탈 트랜스듀서들의 상기 인접하는 전극지들의 극성들은 각각 다르게 만들어지는 것을 특징으로 하는 종결합 공진기형 탄성 표면파 필터.
- 제1항에 따른 종결합 공진기형 탄성 표면파 필터를 포함하고 평형-불평형 변환 기능을 갖는 것을 특징으로 하는 탄성 표면파 장치.
- 제1항에 따른 종결합 공진기형 탄성 표면파 필터 또는 제5항에 따른 탄성 표면파 장치를 포함하는 것을 특징으로 하는 통신 장치.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001084856 | 2001-03-23 | ||
JPJP-P-2001-00084856 | 2001-03-23 | ||
JPJP-P-2001-00249405 | 2001-08-20 | ||
JP2001249405A JP3743329B2 (ja) | 2001-03-23 | 2001-08-20 | 弾性表面波フィルタ、およびそれを用いた弾性表面波装置、通信機装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR20020075307A true KR20020075307A (ko) | 2002-10-04 |
KR100626973B1 KR100626973B1 (ko) | 2006-09-20 |
Family
ID=26611908
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020020015843A KR100626973B1 (ko) | 2001-03-23 | 2002-03-23 | 탄성 표면파 필터와 이를 사용한 탄성 표면파 장치 및 이필터 또는 이 장치를 사용한 통신 장치 |
Country Status (6)
Country | Link |
---|---|
US (1) | US6873227B2 (ko) |
EP (1) | EP1246359B1 (ko) |
JP (1) | JP3743329B2 (ko) |
KR (1) | KR100626973B1 (ko) |
CN (1) | CN1225084C (ko) |
DE (1) | DE60238649D1 (ko) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100437495B1 (ko) * | 2002-07-04 | 2004-06-25 | 주식회사 케이이씨 | 표면 탄성파 필터 |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10213277A1 (de) | 2002-03-25 | 2003-10-16 | Epcos Ag | Multiport-Resonatorfilter |
DE10305379A1 (de) * | 2003-02-10 | 2004-08-19 | Epcos Ag | Frontendschaltung |
DE10352640B4 (de) * | 2003-11-11 | 2014-02-13 | Epcos Ag | DMS-Filter |
JP3877731B2 (ja) * | 2004-02-23 | 2007-02-07 | シャープ株式会社 | 密閉型光源装置とこれを用いた映像表示装置 |
US7446629B2 (en) | 2004-08-04 | 2008-11-04 | Matsushita Electric Industrial Co., Ltd. | Antenna duplexer, and RF module and communication apparatus using the same |
JP4504278B2 (ja) * | 2004-08-04 | 2010-07-14 | パナソニック株式会社 | アンテナ共用器、ならびに、それを用いた高周波モジュールおよび通信機器 |
WO2008038459A1 (fr) * | 2006-09-25 | 2008-04-03 | Murata Manufacturing Co., Ltd. | Filtre d'onde acoustique limite |
CN101622786A (zh) * | 2007-03-01 | 2010-01-06 | 株式会社村田制作所 | 声波滤波器装置以及双工器 |
JP5170262B2 (ja) * | 2009-12-25 | 2013-03-27 | 株式会社村田製作所 | 分波器 |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3792381A (en) * | 1973-02-20 | 1974-02-12 | Hughes Aircraft Co | Surface-wave electro-acoustic transducer |
JPH05145367A (ja) | 1991-02-07 | 1993-06-11 | Mitsubishi Electric Corp | 弾性表面波装置 |
JP3160023B2 (ja) | 1991-08-21 | 2001-04-23 | 東洋通信機株式会社 | 縦結合二重モードsawフィルタ |
JP3152419B2 (ja) | 1991-10-28 | 2001-04-03 | 富士通株式会社 | 弾性表面波フィルタ |
JPH05315886A (ja) * | 1992-05-14 | 1993-11-26 | Matsushita Electric Ind Co Ltd | 弾性表面波フィルタ |
DE69636897T2 (de) * | 1995-05-29 | 2007-10-25 | Sanyo Electric Co., Ltd., Moriguchi | Akustischer Oberflächenwellenfilter |
WO1997000556A1 (en) | 1995-06-16 | 1997-01-03 | Northern Telecom Limited | Cascaded surface wave device filters |
US5896071A (en) * | 1997-05-15 | 1999-04-20 | Northern Telecom Limited | Surface wave device balun resonator filters |
DE19724259C2 (de) | 1997-06-09 | 2002-11-14 | Epcos Ag | Dualmode-Oberflächenwellenfilter |
DE19849782B4 (de) * | 1998-10-28 | 2004-09-30 | Epcos Ag | Oberflächenwellenanordnung mit zumindest zwei Oberflächenwellen-Strukturen |
JP3391346B2 (ja) | 2000-04-18 | 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 |
JP3435640B2 (ja) | 2000-05-22 | 2003-08-11 | 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 |
JP3358615B2 (ja) * | 2000-06-26 | 2002-12-24 | 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 |
JP3454239B2 (ja) * | 2000-08-31 | 2003-10-06 | 株式会社村田製作所 | 弾性表面波フィルタ |
JP3384403B2 (ja) | 2001-03-01 | 2003-03-10 | 株式会社村田製作所 | 弾性表面波装置、通信装置 |
-
2001
- 2001-08-20 JP JP2001249405A patent/JP3743329B2/ja not_active Expired - Lifetime
-
2002
- 2002-03-22 DE DE60238649T patent/DE60238649D1/de not_active Expired - Lifetime
- 2002-03-22 CN CNB021056676A patent/CN1225084C/zh not_active Expired - Lifetime
- 2002-03-22 EP EP02290727A patent/EP1246359B1/en not_active Expired - Lifetime
- 2002-03-23 KR KR1020020015843A patent/KR100626973B1/ko active IP Right Grant
- 2002-03-23 US US10/104,519 patent/US6873227B2/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100437495B1 (ko) * | 2002-07-04 | 2004-06-25 | 주식회사 케이이씨 | 표면 탄성파 필터 |
Also Published As
Publication number | Publication date |
---|---|
EP1246359B1 (en) | 2010-12-22 |
KR100626973B1 (ko) | 2006-09-20 |
CN1378339A (zh) | 2002-11-06 |
US6873227B2 (en) | 2005-03-29 |
JP3743329B2 (ja) | 2006-02-08 |
JP2002353772A (ja) | 2002-12-06 |
US20040070470A1 (en) | 2004-04-15 |
DE60238649D1 (de) | 2011-02-03 |
CN1225084C (zh) | 2005-10-26 |
EP1246359A3 (en) | 2008-09-10 |
EP1246359A2 (en) | 2002-10-02 |
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