TW345749B - Surface acoustic wave device - Google Patents

Surface acoustic wave device

Info

Publication number
TW345749B
TW345749B TW086113450A TW86113450A TW345749B TW 345749 B TW345749 B TW 345749B TW 086113450 A TW086113450 A TW 086113450A TW 86113450 A TW86113450 A TW 86113450A TW 345749 B TW345749 B TW 345749B
Authority
TW
Taiwan
Prior art keywords
transducer
propagation
electrode fingers
axis
cut plane
Prior art date
Application number
TW086113450A
Other languages
English (en)
Inventor
Masanori Ueda
Hiroshi Kawauchi
Tuyoshi Endo
Yashiro Fujiwara
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Application granted granted Critical
Publication of TW345749B publication Critical patent/TW345749B/zh

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H3/00—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators
    • H03H3/007—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks
    • H03H3/08—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks for the manufacture of resonators or networks 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
    • H03H9/6483—Ladder SAW 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
    • H03H9/0023—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
    • H03H9/02535—Details of surface acoustic wave devices
    • H03H9/02543—Characteristics of substrate, e.g. cutting angles
    • H03H9/02559—Characteristics of substrate, e.g. cutting angles of lithium niobate or lithium-tantalate substrates
    • 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
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H2250/00—Indexing scheme relating to dual- or multi-band 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
    • H03H9/02244—Details of microelectro-mechanical resonators
    • H03H9/02259—Driving or detection means
    • H03H9/02275—Comb electrodes
    • 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
    • H03H9/02535—Details of surface acoustic wave devices
    • H03H9/02818—Means for compensation or elimination of undesirable effects
    • H03H9/02921—Measures for preventing electric discharge due to pyroelectricity
    • 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
    • H03H9/14538—Formation

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
TW086113450A 1996-11-28 1997-09-17 Surface acoustic wave device TW345749B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP31827096A JP3224202B2 (ja) 1996-11-28 1996-11-28 弾性表面波装置

Publications (1)

Publication Number Publication Date
TW345749B true TW345749B (en) 1998-11-21

Family

ID=18097334

Family Applications (1)

Application Number Title Priority Date Filing Date
TW086113450A TW345749B (en) 1996-11-28 1997-09-17 Surface acoustic wave device

Country Status (7)

Country Link
US (1) US5874869A (zh)
EP (1) EP0845858B1 (zh)
JP (1) JP3224202B2 (zh)
KR (1) KR100291281B1 (zh)
CN (1) CN1103511C (zh)
DE (1) DE69735746T2 (zh)
TW (1) TW345749B (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6756867B2 (en) 2001-08-09 2004-06-29 Murata Manufacturing Co., Ltd Surface acoustic wave filter and communication apparatus

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EP0746095B1 (en) * 1995-05-29 2007-02-14 SANYO ELECTRIC Co., Ltd. Surface acoustic wave filter
JPH09167936A (ja) 1995-10-13 1997-06-24 Fujitsu Ltd 弾性表面波装置
JP3239064B2 (ja) * 1996-05-28 2001-12-17 富士通株式会社 弾性表面波装置
DE19638370C2 (de) * 1996-09-19 2001-06-13 Epcos Ag Oberflächenwellenfilter für unsymmetrische/symmetrische und symmetrische/symmetrische Betriebsweise
US6107899A (en) * 1996-10-21 2000-08-22 Matsushita Electric Industrial Co., Ltd. Surface acoustic wave filter with grounds not connected in the package or on the piezoelectric substrate
JPH10276062A (ja) * 1997-03-31 1998-10-13 Sanyo Electric Co Ltd 弾性表面波デバイス
US6160339A (en) * 1997-07-17 2000-12-12 Seiko Epson Corporation Two-port saw resonator
JP3137064B2 (ja) * 1998-01-16 2001-02-19 日本電気株式会社 弾性表面波フィルタ
JP3315644B2 (ja) * 1998-05-14 2002-08-19 富士通株式会社 弾性表面波素子
JP2000059176A (ja) * 1998-08-06 2000-02-25 Toshiba Corp 弾性表面波素子
US6472959B1 (en) * 1999-03-11 2002-10-29 Nortel Networks Limited Longitudinally coupled double mode resonator filters using shallow bulk acoustic waves
JP3403669B2 (ja) * 1999-06-04 2003-05-06 富士通株式会社 アンテナ分波器
JP2000349591A (ja) * 1999-06-08 2000-12-15 Oki Electric Ind Co Ltd 弾性表面波フィルタを用いた分波器
JP3391309B2 (ja) 1999-09-02 2003-03-31 株式会社村田製作所 表面波装置及び通信機装置
DE19960299A1 (de) * 1999-12-14 2001-06-21 Epcos Ag Duplexer mit verbesserter Sende-/Empfangsbandtrennung
US6466107B2 (en) * 1999-12-14 2002-10-15 Murata Manufacturing Co., Ltd. Ladder filter comprising stacked piezoelectric resonators
JP3449352B2 (ja) * 2000-02-07 2003-09-22 株式会社村田製作所 弾性表面波フィルタ
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
JP3478264B2 (ja) * 2000-03-10 2003-12-15 株式会社村田製作所 弾性表面波装置
JP2001267881A (ja) * 2000-03-17 2001-09-28 Fujitsu Media Device Kk 弾性表面波デバイス及びこれを用いた通信装置、並びにアンテナデュプレクサ
US6417746B1 (en) 2000-04-07 2002-07-09 Conexant Systems, Inc. Longitudinally-coupled saw filter with enhanced frequency selectivity
JP3729081B2 (ja) * 2000-06-27 2005-12-21 株式会社村田製作所 弾性表面波装置
US6556104B2 (en) 2000-08-31 2003-04-29 Sawtek, Inc. Surface acoustic wave devices using optimized cuts of a piezoelectric substrate
JP3478260B2 (ja) * 2000-10-27 2003-12-15 株式会社村田製作所 弾性表面波フィルタおよび通信機装置
FR2818051B1 (fr) * 2000-12-08 2003-04-11 Thomson Csf Flitres a ondes acoustiques de surface a symetrie optimisee
JP3534080B2 (ja) * 2001-03-23 2004-06-07 株式会社村田製作所 弾性表面波フィルタ装置
JP2003060484A (ja) * 2001-08-14 2003-02-28 Murata Mfg Co Ltd 弾性表面波装置
JP3826816B2 (ja) * 2001-08-29 2006-09-27 株式会社村田製作所 弾性表面波装置
US6750737B2 (en) * 2001-10-02 2004-06-15 Matsushita Electric Industrial Co., Ltd. High frequency switch and radio communication apparatus with layered body for saw filter mounting
JP3743341B2 (ja) * 2001-10-17 2006-02-08 株式会社村田製作所 弾性表面波装置
JP3833569B2 (ja) * 2001-12-21 2006-10-11 富士通メディアデバイス株式会社 分波器及びこれを用いた電子装置
JP2003198317A (ja) * 2001-12-21 2003-07-11 Fujitsu Media Device Kk 弾性表面波共振子及び弾性表面波フィルタ
JP4052884B2 (ja) 2002-06-24 2008-02-27 富士通株式会社 タッチパネル装置
JP3970168B2 (ja) 2002-11-19 2007-09-05 富士通株式会社 タッチパネル装置
CN100454760C (zh) * 2003-04-25 2009-01-21 富士通媒体部品株式会社 双工器
JP2005244669A (ja) * 2004-02-26 2005-09-08 Fujitsu Media Device Kk 弾性表面波装置
US20050248548A1 (en) 2004-04-14 2005-11-10 Masahiro Tsumura Acoustic touch sensor
JP2007053563A (ja) * 2005-08-17 2007-03-01 Nippon Dempa Kogyo Co Ltd 弾性表面波フィルタモジュールおよびこのモジュールの製造方法
DE102006003850B4 (de) * 2006-01-26 2015-02-05 Epcos Ag Elektroakustisches Bauelement
DE102006019961B4 (de) * 2006-04-28 2008-01-10 Epcos Ag Elektroakustisches Bauelement
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
JP5016467B2 (ja) 2007-12-14 2012-09-05 太陽誘電株式会社 弾性波フィルタ
US8102238B2 (en) * 2008-05-30 2012-01-24 International Business Machines Corporation Using an RFID device to enhance security by determining whether a person in a secure area is accompanied by an authorized person
JP4809448B2 (ja) * 2009-02-02 2011-11-09 日本電波工業株式会社 デュプレクサ
JP5777975B2 (ja) * 2011-08-22 2015-09-16 太陽誘電株式会社 通信モジュール
JP2012143008A (ja) * 2012-04-26 2012-07-26 Taiyo Yuden Co Ltd 弾性波フィルタ
JP6013829B2 (ja) * 2012-08-17 2016-10-25 太陽誘電株式会社 弾性波フィルタ、デュプレクサ及びモジュール
CN104330470B (zh) * 2014-09-30 2018-04-10 成都柏森松传感技术有限公司 基于saw传感器的检测装置
KR101641528B1 (ko) * 2014-11-13 2016-07-22 (주)와이솔 Saw 필터
CN104833410A (zh) * 2015-05-11 2015-08-12 天津理工大学 一种对压电材料声表面波速度进行测量的方法
KR102399689B1 (ko) 2016-10-13 2022-05-19 가부시키가이샤 무라타 세이사쿠쇼 탄성파 필터 장치
CN106603035A (zh) * 2016-12-23 2017-04-26 北京中科飞鸿科技有限公司 一种提高声表面波滤波器耐受功率的方法
CN108336979B (zh) * 2018-01-30 2020-10-30 华中科技大学 一种集成式射频信号滤波和放大器件
JP7033462B2 (ja) * 2018-02-19 2022-03-10 ＮＤＫ ＳＡＷ ｄｅｖｉｃｅｓ株式会社 弾性表面波デバイス
US11621691B2 (en) * 2018-07-16 2023-04-04 Qorvo Us, Inc. Reflective structures for surface acoustic wave devices
CN116318036B (zh) * 2023-05-15 2023-09-22 成都频岢微电子有限公司 声表面波谐振器、声表面波滤波器及双工器

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JPH0715274A (ja) * 1991-06-02 1995-01-17 Kazuhiko Yamanouchi 高安定高結合弾性表面波基板を用いた高周波弾性表 面波フィルタ及び弾性表面波機能素子
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6756867B2 (en) 2001-08-09 2004-06-29 Murata Manufacturing Co., Ltd Surface acoustic wave filter and communication apparatus

Also Published As

Publication number Publication date
KR19980041881A (ko) 1998-08-17
DE69735746T2 (de) 2006-09-07
US5874869A (en) 1999-02-23
EP0845858A3 (en) 2000-01-19
CN1103511C (zh) 2003-03-19
CN1184378A (zh) 1998-06-10
JP3224202B2 (ja) 2001-10-29
EP0845858A2 (en) 1998-06-03
JPH10163803A (ja) 1998-06-19
EP0845858B1 (en) 2006-04-26
DE69735746D1 (de) 2006-06-01
KR100291281B1 (ko) 2001-06-01

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