KR100626973B1 - 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
- KR100626973B1 KR100626973B1 KR1020020015843A KR20020015843A KR100626973B1 KR 100626973 B1 KR100626973 B1 KR 100626973B1 KR 1020020015843 A KR1020020015843 A KR 1020020015843A KR 20020015843 A KR20020015843 A KR 20020015843A KR 100626973 B1 KR100626973 B1 KR 100626973B1
- Authority
- KR
- South Korea
- Prior art keywords
- acoustic wave
- surface acoustic
- wave filter
- electrode
- electrode fingers
- Prior art date
Links
- 238000010897 surface acoustic wave method Methods 0.000 title claims description 125
- 238000006243 chemical reaction Methods 0.000 claims description 16
- 239000000758 substrate Substances 0.000 claims description 7
- 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
Images
Classifications
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- 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
- H03H9/46—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
- H03H9/0042—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
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 적어도 한 위치에서 두 개의 인접하는 전극지들을 포함하고, 상기 두 개의 인접하는 전극지들은 전극이 반전되어 극성이 같도록 만들어 지고,상기 전극 반전은 상기 탄성 표면파 필터의 중앙에 대해 대칭적으로 수행되는 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.
- 삭제
- 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 필터가 적어도 2개 이상 직렬로 연결되어 평형-불평형 변환 기능을 갖는 것을 특징으로 하는 탄성 표면파 장치.
- 안테나;상기 안테나에 접속된 듀플렉서;상기 듀플렉서의 일단에 접속되며, 탄성 표면파 필터, 증폭기 및 수신측 혼합기로 구성되는 수신부; 및상기 듀플렉서의 타단에 접속되며, 증폭기, 탄성 표면파 필터 및 송신측 혼합기로 구성되는 송신부를 포함하는 통신 장치에 있어서,상기 수신부 또는 상기 송신부의 탄성 표면파 필터로서, 제1항에 따른 종결합 공진기형 탄성 표면파 필터 또는 제5항에 따른 탄성 표면파 장치를 이용하는 것을 특징으로 하는 통신 장치.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JPJP-P-2001-00084856 | 2001-03-23 | ||
JP2001084856 | 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 KR20020075307A (ko) | 2002-10-04 |
KR100626973B1 true 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) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10213277A1 (de) * | 2002-03-25 | 2003-10-16 | Epcos Ag | Multiport-Resonatorfilter |
KR100437495B1 (ko) * | 2002-07-04 | 2004-06-25 | 주식회사 케이이씨 | 표면 탄성파 필터 |
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 |
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 |
US7446629B2 (en) * | 2004-08-04 | 2008-11-04 | Matsushita Electric Industrial Co., Ltd. | Antenna duplexer, and RF module and communication apparatus using the same |
JPWO2008038459A1 (ja) * | 2006-09-25 | 2010-01-28 | 株式会社村田製作所 | 弾性境界波フィルタ装置 |
EP2117120A1 (en) * | 2007-03-01 | 2009-11-11 | Murata Manufacturing Co. Ltd. | Elastic wave filter device and duplexer |
JP5170262B2 (ja) * | 2009-12-25 | 2013-03-27 | 株式会社村田製作所 | 分波器 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5485052A (en) * | 1992-05-14 | 1996-01-16 | Matsushita Electric Industrial Co., Ltd. | Three electrode type saw longitudinal coupling filter |
US5835990A (en) * | 1995-06-16 | 1998-11-10 | Northern Telecom Limited | Longitudinally coupled double mode surface wave resonators |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
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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 |
EP0746095B1 (en) * | 1995-05-29 | 2007-02-14 | SANYO ELECTRIC Co., Ltd. | Surface acoustic wave filter |
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 CN CNB021056676A patent/CN1225084C/zh not_active Expired - Lifetime
- 2002-03-22 EP EP02290727A patent/EP1246359B1/en not_active Expired - Lifetime
- 2002-03-22 DE DE60238649T patent/DE60238649D1/de 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
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5485052A (en) * | 1992-05-14 | 1996-01-16 | Matsushita Electric Industrial Co., Ltd. | Three electrode type saw longitudinal coupling filter |
US5835990A (en) * | 1995-06-16 | 1998-11-10 | Northern Telecom Limited | Longitudinally coupled double mode surface wave resonators |
Also Published As
Publication number | Publication date |
---|---|
JP2002353772A (ja) | 2002-12-06 |
KR20020075307A (ko) | 2002-10-04 |
CN1225084C (zh) | 2005-10-26 |
US20040070470A1 (en) | 2004-04-15 |
EP1246359A2 (en) | 2002-10-02 |
EP1246359B1 (en) | 2010-12-22 |
US6873227B2 (en) | 2005-03-29 |
DE60238649D1 (de) | 2011-02-03 |
EP1246359A3 (en) | 2008-09-10 |
CN1378339A (zh) | 2002-11-06 |
JP3743329B2 (ja) | 2006-02-08 |
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