KR20020081100A - 탄성표면파 장치 및 통신 장치 - Google Patents
탄성표면파 장치 및 통신 장치 Download PDFInfo
- Publication number
- KR20020081100A KR20020081100A KR1020020020611A KR20020020611A KR20020081100A KR 20020081100 A KR20020081100 A KR 20020081100A KR 1020020020611 A KR1020020020611 A KR 1020020020611A KR 20020020611 A KR20020020611 A KR 20020020611A KR 20020081100 A KR20020081100 A KR 20020081100A
- Authority
- KR
- South Korea
- Prior art keywords
- electrode
- surface acoustic
- acoustic wave
- pitch
- electrode fingers
- 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
- H03H9/46—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
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L11/00—Pulses, i.e. fruits of leguminous plants, for production of food; Products from legumes; Preparation or treatment thereof
- A23L11/05—Mashed or comminuted pulses or legumes; Products made therefrom
- A23L11/07—Soya beans, e.g. oil-extracted soya bean flakes
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23P—SHAPING OR WORKING OF FOODSTUFFS, NOT FULLY COVERED BY A SINGLE OTHER SUBCLASS
- A23P30/00—Shaping or working of foodstuffs characterised by the process or apparatus
- A23P30/10—Moulding
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J43/00—Implements for preparing or holding food, not provided for in other groups of this subclass
- A47J43/20—Shapes for preparing foodstuffs, e.g. meat-patty moulding devices, pudding moulds
-
- 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
- H03H9/02—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
- H03H9/46—Filters
- H03H9/64—Filters using surface acoustic waves
- H03H9/6423—Means for obtaining a particular transfer characteristic
- H03H9/6433—Coupled resonator filters
- H03H9/644—Coupled resonator filters having two acoustic tracks
- H03H9/6456—Coupled resonator filters having two acoustic tracks being electrically coupled
- H03H9/6469—Coupled resonator filters having two acoustic tracks being electrically coupled via two connecting electrodes
Landscapes
- Acoustics & Sound (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Food Science & Technology (AREA)
- Chemical & Material Sciences (AREA)
- Polymers & Plastics (AREA)
- Agronomy & Crop Science (AREA)
- Nutrition Science (AREA)
- Health & Medical Sciences (AREA)
- Botany (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
Abstract
Description
Claims (9)
- 압전기판상에, 복수의 전극지를 갖는 빗형 전극부가, 탄성표면파의 전파방향을 따라서 복수개 형성되어 있는 종결합 공진자형의 탄성표면파 장치로,적어도 하나의 빗형 전극부에 대하여, 다른 빗형 전극부에 이웃하는 단부로부터의 일부분의 전극지의 피치는 다른 부분의 전극지의 피치보다 작게 설정되며,상기 피치를 작게 한 전극지의 듀티(duty)는 다른 부분의 전극지의 듀티보다 작게 설정되어 있는 것을 특징으로 하는 탄성표면파 장치.
- 제 1 항에 있어서, 서로 이웃하는 양쪽의 빗형 전극부에 대하여, 피치를 다르게 한 전극지가 각각 형성되고,상기 피치를 다르게 한 전극지의 피치로 정해지는 파장을 λⅠ2, 그 외의 전극지의 파장으로 정해지는 파장을 λⅠ1로 하였을 때, 2개의 빗형 전극부가 이웃하는 전극지 중심간 거리를 0.5λⅠ2에 대략 일치시킨 것을 특징으로 하는 탄성표면파 장치.
- 제 1 항에 있어서, 서로 이웃하는 각 빗형 전극부 중의 어느 하나에 피치를 다르게 한 전극지가 형성되며,상기 피치를 다르게 한 전극지의 피치로 정해지는 파장을 λⅠ2, 그 외의 전극지의 피치로 정해지는 파장을 λⅠ1로 하였을 때, 2개의 빗형 전극부가 이웃하는 전극지 중심간 거리를 0.25λⅠ1+0.25λⅠ2에 대략 일치시킨 것을 특징으로 하는 탄성표면파 장치.
- 제 2 항 또는 제 3 항에 있어서, 상기 빗형 전극부가 인접해 있는 단부에서부터의 일부분의 전극지의 피치를 그 빗형 전극부의 다른 전극지의 피치와 다르게 한, 빗형 전극부에 있어서, 상기 피치를 다르게 한 전극지와 다르게 하지 않은 전극지가 이웃하는 부위의 전극지 중심간 거리를 0.25λⅠ1+0.25λⅠ2에 대략 일치시킨 것을 특징으로 하는 탄성표면파 장치.
- 제 1 항에 있어서, 상기 피치를 작게 한 전극지의 듀티를, 그 빗형 전극부의 다른 부분의 전극지의 듀티보다 작고, 또한 0.45이상으로 한 것을 특징으로 하는 탄성표면파 장치.
- 압전기판상에, 복수의 전극지를 갖는 빗형 전극부가, 탄성표면파의 전파방향을 따라서 복수개 형성되어 있는 종결합 공진자형의 탄성표면파 장치로,적어도 어느 2개의 빗형 전극부 사이에서 이웃하는 전극지의 듀티를 다른 부분의 전극지의 듀티보다 작게 설정한 것을 특징으로 하는 탄성표면파 장치.
- 제 6 항에 있어서, 2개의 빗형 전극부 사이에서 이웃하는 전극지 중심 간격을, 다른 부분의 전극지 중심 간격(전극지 피치)보다도 작게 설정한 것을 특징으로 하는 탄성표면파 장치.
- 제 1 항에 있어서, 평형-불평형 입출력을 갖는 것을 특징으로 하는 탄성표면파 장치.
- 제 1 항의 탄성표면파 장치를 사용한 것을 특징으로 하는 통신장치.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001117376 | 2001-04-16 | ||
JPJP-P-2001-00117376 | 2001-04-16 | ||
JP2001368285A JP3419402B2 (ja) | 2001-04-16 | 2001-12-03 | 弾性表面波装置、通信装置 |
JPJP-P-2001-00368285 | 2001-12-03 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020050005697A Division KR100583273B1 (ko) | 2001-04-16 | 2005-01-21 | 탄성표면파 장치 및 통신 장치 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR20020081100A true KR20020081100A (ko) | 2002-10-26 |
KR100609965B1 KR100609965B1 (ko) | 2006-08-04 |
Family
ID=26613666
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020020020611A KR100609965B1 (ko) | 2001-04-16 | 2002-04-16 | 탄성표면파 장치 및 통신 장치 |
KR1020050005697A KR100583273B1 (ko) | 2001-04-16 | 2005-01-21 | 탄성표면파 장치 및 통신 장치 |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020050005697A KR100583273B1 (ko) | 2001-04-16 | 2005-01-21 | 탄성표면파 장치 및 통신 장치 |
Country Status (6)
Country | Link |
---|---|
US (1) | US6737942B2 (ko) |
EP (1) | EP1251637B1 (ko) |
JP (1) | JP3419402B2 (ko) |
KR (2) | KR100609965B1 (ko) |
CN (2) | CN100557968C (ko) |
TW (1) | TWI257768B (ko) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100598434B1 (ko) * | 2003-04-10 | 2006-07-11 | 가부시키가이샤 무라타 세이사쿠쇼 | 탄성표면파 장치 및 그것을 이용한 통신장치 |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100499368C (zh) | 2004-08-23 | 2009-06-10 | 株式会社村田制作所 | 平衡型声表面波滤波器 |
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 |
JP5039290B2 (ja) * | 2005-08-25 | 2012-10-03 | 太陽誘電株式会社 | フィルタおよびアンテナ分波器 |
WO2007145057A1 (ja) * | 2006-06-16 | 2007-12-21 | Murata Manufacturing Co., Ltd. | 弾性表面波装置 |
CN104734662B (zh) * | 2009-04-22 | 2017-09-22 | 天工滤波方案日本有限公司 | 弹性波元件和使用它的电子设备 |
JP6595342B2 (ja) * | 2013-11-29 | 2019-10-23 | 京セラ株式会社 | 弾性波素子、分波器および通信装置 |
CN106416067B (zh) | 2014-06-26 | 2019-03-08 | 株式会社村田制作所 | 纵耦合谐振器型声表面波滤波器 |
WO2020031783A1 (ja) * | 2018-08-07 | 2020-02-13 | 株式会社村田製作所 | フィルタおよびマルチプレクサ |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS63135010A (ja) * | 1986-11-26 | 1988-06-07 | Alps Electric Co Ltd | 弾性表面波共振子 |
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 |
JP3301168B2 (ja) | 1993-07-27 | 2002-07-15 | 富士通株式会社 | 表面弾性波フィルタとその製造方法 |
US5600287A (en) * | 1994-02-03 | 1997-02-04 | Motorola, Inc. | Acoustic wave filter with reduced bulk-wave scattering loss, ladder filter incorporating same and method |
JP3305475B2 (ja) * | 1994-02-10 | 2002-07-22 | 三菱電機株式会社 | 弾性波素子 |
JPH0969751A (ja) * | 1995-08-30 | 1997-03-11 | Murata Mfg Co Ltd | 弾性表面波フィルタ |
JP3324424B2 (ja) | 1995-12-28 | 2002-09-17 | 株式会社村田製作所 | 縦結合型弾性表面波共振子フィルタ |
EP0782255B1 (en) | 1995-12-28 | 2002-03-27 | Murata Manufacturing Co., Ltd. | Longitudinal coupling type surface acoustic wave resonator filter |
JPH09246901A (ja) * | 1996-03-06 | 1997-09-19 | Toshiba Corp | 弾性表面波共振子フィルタ |
JP3480785B2 (ja) * | 1996-06-03 | 2003-12-22 | エヌ・アール・エス・テクノロジー株式会社 | 縦モード共振器弾性表面波フィルタ |
JPH10335973A (ja) * | 1997-05-30 | 1998-12-18 | Toyo Commun Equip Co Ltd | 縦結合二重モードsawフィルタ |
WO1999004489A1 (fr) * | 1997-07-18 | 1999-01-28 | Kabushiki Kaisha Toshiba | Filtre d'ondes acoustiques de surface |
DE19849782B4 (de) * | 1998-10-28 | 2004-09-30 | Epcos Ag | Oberflächenwellenanordnung mit zumindest zwei Oberflächenwellen-Strukturen |
JP2000183682A (ja) * | 1998-12-21 | 2000-06-30 | Toyo Commun Equip Co Ltd | 二重モードsawフィルタ |
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 |
JP3414387B2 (ja) * | 2001-03-09 | 2003-06-09 | 株式会社村田製作所 | 弾性表面波装置、通信装置 |
EP1249934B1 (en) * | 2001-04-09 | 2013-07-31 | Murata Manufacturing Co., Ltd. | Surface acoustic wave apparatus and communications unit |
-
2001
- 2001-12-03 JP JP2001368285A patent/JP3419402B2/ja not_active Expired - Lifetime
-
2002
- 2002-04-16 US US10/122,352 patent/US6737942B2/en not_active Expired - Lifetime
- 2002-04-16 CN CNB2004100317728A patent/CN100557968C/zh not_active Expired - Lifetime
- 2002-04-16 EP EP02290962.6A patent/EP1251637B1/en not_active Expired - Lifetime
- 2002-04-16 TW TW091107701A patent/TWI257768B/zh not_active IP Right Cessation
- 2002-04-16 KR KR1020020020611A patent/KR100609965B1/ko active IP Right Grant
- 2002-04-16 CN CNB021217165A patent/CN1207934C/zh not_active Expired - Lifetime
-
2005
- 2005-01-21 KR KR1020050005697A patent/KR100583273B1/ko active IP Right Grant
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100598434B1 (ko) * | 2003-04-10 | 2006-07-11 | 가부시키가이샤 무라타 세이사쿠쇼 | 탄성표면파 장치 및 그것을 이용한 통신장치 |
Also Published As
Publication number | Publication date |
---|---|
CN1207934C (zh) | 2005-06-22 |
JP2003008390A (ja) | 2003-01-10 |
CN100557968C (zh) | 2009-11-04 |
EP1251637A3 (en) | 2010-02-24 |
CN1527479A (zh) | 2004-09-08 |
CN1382004A (zh) | 2002-11-27 |
JP3419402B2 (ja) | 2003-06-23 |
TWI257768B (en) | 2006-07-01 |
US20020175783A1 (en) | 2002-11-28 |
EP1251637A2 (en) | 2002-10-23 |
KR20050016731A (ko) | 2005-02-21 |
EP1251637B1 (en) | 2013-07-31 |
KR100609965B1 (ko) | 2006-08-04 |
US6737942B2 (en) | 2004-05-18 |
KR100583273B1 (ko) | 2006-05-26 |
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