FR2401551A1 - Filtre a ondes acoustiques de surface - Google Patents

Filtre a ondes acoustiques de surface

Info

Publication number
FR2401551A1
FR2401551A1 FR7816625A FR7816625A FR2401551A1 FR 2401551 A1 FR2401551 A1 FR 2401551A1 FR 7816625 A FR7816625 A FR 7816625A FR 7816625 A FR7816625 A FR 7816625A FR 2401551 A1 FR2401551 A1 FR 2401551A1
Authority
FR
France
Prior art keywords
wave filter
acoustic wave
surface acoustic
transducer
transducers
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.)
Granted
Application number
FR7816625A
Other languages
English (en)
Other versions
FR2401551B1 (fr
Inventor
Masahide Tsukamoto
Masahiro Nagasawa
Hiroshi Yamazoe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of FR2401551A1 publication Critical patent/FR2401551A1/fr
Application granted granted Critical
Publication of FR2401551B1 publication Critical patent/FR2401551B1/fr
Granted legal-status Critical Current

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
    • H03H9/02—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
    • H03H9/1455—Transducers of particular shape or position constituted of N parallel or series 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
    • H03H9/0023—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
    • H03H9/02—Details
    • H03H9/125—Driving means, e.g. electrodes, coils
    • H03H9/145—Driving means, e.g. electrodes, coils for networks using surface acoustic waves
    • H03H9/14517—Means for weighting
    • H03H9/1452—Means for weighting by finger overlap length, apodisation
    • 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
    • H03H9/14547—Fan shaped; Tilted; Shifted; Slanted; Tapered; Arched; Stepped finger 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
    • H03H9/125—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
    • H03H9/14558—Slanted, tapered or fan shaped 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
    • H03H9/125—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
    • H03H9/14564—Shifted fingers 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
    • H03H9/125—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
    • H03H9/14564—Shifted fingers transducers
    • H03H9/14567—Stepped-fan shaped 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
    • H03H9/125—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
    • H03H9/14594—Plan-rotated or plan-tilted 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
    • H03H9/46—Filters
    • H03H9/64—Filters using surface acoustic waves
    • H03H9/6423—Means for obtaining a particular transfer characteristic
    • H03H9/6433—Coupled resonator filters
    • 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
    • H03H9/14552—Transducers of particular shape or position comprising split fingers

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)

Abstract

La présente invention concerne un filtre à ondes acoustiques de surface. Pour obtenir de faibles pertes par insertion et un faible niveau d'écho triple de transit, un premier transducteur central 12, un second transducteur 13 et un troisième transducteur 14 sont disposés sur un substrat piézoélectrique 11, de sorte que la distance entre les lignes centrales des premier et second transducteurs (l1y ) et la distance entre les lignes centrales des premier et troisième transducteurs (l2y ) varient linéairement selon la direction Y perpendiculaire à la direction de propagation X des ondes acoustiques. Application au filtrage des ondes vidéo en télévision.
FR7816625A 1977-06-03 1978-06-02 Filtre a ondes acoustiques de surface Granted FR2401551A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6614177A JPS54844A (en) 1977-06-03 1977-06-03 Elastic surface wave filter

Publications (2)

Publication Number Publication Date
FR2401551A1 true FR2401551A1 (fr) 1979-03-23
FR2401551B1 FR2401551B1 (fr) 1982-08-13

Family

ID=13307275

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7816625A Granted FR2401551A1 (fr) 1977-06-03 1978-06-02 Filtre a ondes acoustiques de surface

Country Status (5)

Country Link
US (1) US4203082A (fr)
JP (1) JPS54844A (fr)
DE (1) DE2824371C2 (fr)
FR (1) FR2401551A1 (fr)
GB (1) GB1604573A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2436529A1 (fr) * 1978-09-13 1980-04-11 Siemens Ag Dispositif a ondes de surface, a suppression amelioree des signaux parasites

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5561126A (en) * 1978-11-01 1980-05-08 Hitachi Ltd Elastic surface wave device
FR2447644A1 (fr) * 1979-01-26 1980-08-22 Thomson Csf Transducteur d'ondes elastiques de surface et filtre comprenant un tel transducteur
JPS5843609A (ja) * 1981-09-09 1983-03-14 Toshiba Corp 弾性表面波装置
JPS58154917A (ja) * 1982-03-10 1983-09-14 Hitachi Ltd 弾性表面波バンドパスフイルタ
US4707631A (en) * 1984-02-15 1987-11-17 Trw Inc. Isotropic acoustic wave substrate
FR2571907B1 (fr) * 1984-10-15 1991-02-08 Clarion Co Ltd Dispositif a onde acoustique de surface
US4799396A (en) * 1986-03-25 1989-01-24 Machine Engineering Co., Ltd. Reduction gear
GB2193060B (en) * 1986-07-16 1991-04-03 Japan Radio Co Ltd Surface elastic wave filter
JP2606708B2 (ja) * 1987-11-17 1997-05-07 日本無線株式会社 弾性表面波フィルタ
GB2212685B (en) * 1987-11-17 1992-10-14 Japan Radio Co Ltd Surface elastic wave device
US4941133A (en) * 1989-06-26 1990-07-10 The United States Of America As Represented By The Secretary Of The Army Saw slanted array correlator (SAC) with separate amplitude compensation channel
JPH03293808A (ja) * 1990-04-11 1991-12-25 Fujitsu Ltd 弾性表面波素子の製造方法
JP2817479B2 (ja) * 1991-10-30 1998-10-30 三菱電機株式会社 弾性表面波回路装置
DE4307726C1 (de) * 1993-03-11 1994-07-28 Siemens Matsushita Components Mit akustischen Oberflächenwellen arbeitendes Bauelement
EP0791180B1 (fr) * 1994-11-08 2003-10-15 HERA Rotterdam B.V. Procede d'identification a distance de repondeurs mobiles
US5831492A (en) * 1995-09-15 1998-11-03 Sawtek Inc. Weighted tapered spudt saw device
US5818310A (en) * 1996-08-27 1998-10-06 Sawtek Inc. Series-block and line-width weighted saw filter device
US5831494A (en) * 1996-12-12 1998-11-03 Sawtek Inc. Dual track low-loss reflective saw filter
US5767604A (en) * 1997-03-06 1998-06-16 Toda; Kohji Elastic wave device for sensing a touch-position
US6023122A (en) * 1999-04-15 2000-02-08 Nortel Networks Corporation Surface wave devices with tapered transducers
DE10025450B4 (de) * 2000-05-23 2010-04-15 Epcos Ag Oberflächenwellen-Bandpassfilter in Drei-Wandler-Anordnung
JP3934544B2 (ja) * 2002-04-11 2007-06-20 富士通株式会社 弾性波観測装置
JP4085895B2 (ja) * 2003-06-19 2008-05-14 セイコーエプソン株式会社 弾性表面波フィルタおよび弾性表面波共振器
JP2005150918A (ja) * 2003-11-12 2005-06-09 Murata Mfg Co Ltd 弾性表面波フィルタ
KR100812064B1 (ko) 2006-09-08 2008-03-07 에스케이 텔레콤주식회사 양방향 표면 탄성파 필터
JP5776243B2 (ja) * 2011-03-18 2015-09-09 日本電波工業株式会社 弾性波フィルタ
DE102012112237A1 (de) * 2012-12-13 2014-06-18 Epcos Ag Elektroakustisches Bandpassfilter mit geglätteter Einfügedämpfung
RU208596U1 (ru) * 2021-08-04 2021-12-27 Акционерное общество "Омский научно-исследовательский институт приборостроения" (АО "ОНИИП") Трехпреобразовательный веерный фильтр на поверхностных акустических волнах

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1260525A (en) * 1969-03-31 1972-01-19 Zenith Radio Corp An acoustic electric filter system
FR2279262A1 (fr) * 1974-07-15 1976-02-13 Nippon Telegraph & Telephone Filtre a ondes elastiques superficielles
FR2296305A1 (fr) * 1974-12-25 1976-07-23 Sony Corp Filtre a ondes acoustiques de surface
DE2656154A1 (de) * 1975-12-19 1977-07-07 Hans Dr Kuzmany Elektroakustischer wandler zum einschreiben und auslesen von information aus einer zweidimensionalen oder dreidimensionalen matrix
US4081769A (en) * 1976-09-13 1978-03-28 Texas Instruments Incorporated Acoustic surface wave resonator with suppressed direct coupled response

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3727718A (en) * 1971-11-24 1973-04-17 Us Navy Surface wave ambiguity analyzer
DE2435751A1 (de) * 1974-07-25 1976-02-12 Licentia Gmbh Akustisches oberflaechenwellenfilter
US4016513A (en) * 1975-12-04 1977-04-05 Sperry Rand Corporation Surface wave convolver apparatus

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1260525A (en) * 1969-03-31 1972-01-19 Zenith Radio Corp An acoustic electric filter system
FR2279262A1 (fr) * 1974-07-15 1976-02-13 Nippon Telegraph & Telephone Filtre a ondes elastiques superficielles
FR2296305A1 (fr) * 1974-12-25 1976-07-23 Sony Corp Filtre a ondes acoustiques de surface
DE2656154A1 (de) * 1975-12-19 1977-07-07 Hans Dr Kuzmany Elektroakustischer wandler zum einschreiben und auslesen von information aus einer zweidimensionalen oder dreidimensionalen matrix
AT341578B (de) * 1975-12-19 1978-02-10 Hans Dr Kuzmany Elektroakustischer wandler zur elektrischen anregung einer akustischen oberflachenwelle bzw. zur akustischen anregung einer elektrischen welle durch den piezoelektrischen effekt
US4081769A (en) * 1976-09-13 1978-03-28 Texas Instruments Incorporated Acoustic surface wave resonator with suppressed direct coupled response

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
EXBK/72 *
EXBK/73 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2436529A1 (fr) * 1978-09-13 1980-04-11 Siemens Ag Dispositif a ondes de surface, a suppression amelioree des signaux parasites

Also Published As

Publication number Publication date
US4203082A (en) 1980-05-13
DE2824371C2 (de) 1984-07-05
FR2401551B1 (fr) 1982-08-13
JPS5740683B2 (fr) 1982-08-30
GB1604573A (en) 1981-12-09
JPS54844A (en) 1979-01-06
DE2824371A1 (de) 1979-01-18

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