ATE403270T1 - Symmetrie-saw-filter - Google Patents

Symmetrie-saw-filter

Info

Publication number
ATE403270T1
ATE403270T1 AT05793718T AT05793718T ATE403270T1 AT E403270 T1 ATE403270 T1 AT E403270T1 AT 05793718 T AT05793718 T AT 05793718T AT 05793718 T AT05793718 T AT 05793718T AT E403270 T1 ATE403270 T1 AT E403270T1
Authority
AT
Austria
Prior art keywords
idt
saw filter
segment
wiring lines
filter element
Prior art date
Application number
AT05793718T
Other languages
English (en)
Inventor
Yuichi Takamine
Original Assignee
Murata Mfg Co Ltd Patent Secti
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 Murata Mfg Co Ltd Patent Secti filed Critical Murata Mfg Co Ltd Patent Secti
Application granted granted Critical
Publication of ATE403270T1 publication Critical patent/ATE403270T1/de

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic elements; 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 elements; 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 elements; Electromechanical resonators
    • H03H9/0023—Networks for transforming balanced signals into unbalanced signals and vice versa, e.g. baluns, or networks having balanced input and output
    • H03H9/0028—Networks for transforming balanced signals into unbalanced signals and vice versa, e.g. baluns, or networks having balanced input and output using surface acoustic wave devices
    • H03H9/0047—Networks for transforming balanced signals into unbalanced signals and vice versa, e.g. baluns, or networks having balanced input and output using surface acoustic wave devices having two acoustic tracks
    • H03H9/0052—Networks for transforming balanced signals into unbalanced signals and vice versa, e.g. baluns, or networks having balanced input and output using surface acoustic wave devices having two acoustic tracks being electrically cascaded
    • H03H9/0057—Networks for transforming balanced signals into unbalanced signals and vice versa, e.g. baluns, or networks having balanced input and output using surface acoustic wave devices having two acoustic tracks being electrically cascaded 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 elements; Electromechanical resonators
    • H03H9/0023—Networks for transforming balanced signals into unbalanced signals and vice versa, e.g. baluns, or networks having balanced input and output
    • H03H9/0028—Networks for transforming balanced signals into unbalanced signals and vice versa, e.g. baluns, or networks having balanced input and output using surface acoustic wave devices
    • H03H9/0047—Networks for transforming balanced signals into unbalanced signals and vice versa, e.g. baluns, or networks having balanced input and output using surface acoustic wave devices having two acoustic tracks
    • H03H9/0052—Networks for transforming balanced signals into unbalanced signals and vice versa, e.g. baluns, or networks having balanced input and output using surface acoustic wave devices having two acoustic tracks being electrically cascaded
    • H03H9/0061—Networks for transforming balanced signals into unbalanced signals and vice versa, e.g. baluns, or networks having balanced input and output using surface acoustic wave devices having two acoustic tracks being electrically cascaded the balanced terminals being on opposite sides of the tracks
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic elements; 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
    • H03H9/14588—Horizontally-split transducers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators
    • H03H9/25—Constructional features of resonators using surface acoustic waves

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
  • Thermistors And Varistors (AREA)
  • Harvester Elements (AREA)
  • Gyroscopes (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
AT05793718T 2004-11-04 2005-10-12 Symmetrie-saw-filter ATE403270T1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2004320551 2004-11-04

Publications (1)

Publication Number Publication Date
ATE403270T1 true ATE403270T1 (de) 2008-08-15

Family

ID=36319014

Family Applications (1)

Application Number Title Priority Date Filing Date
AT05793718T ATE403270T1 (de) 2004-11-04 2005-10-12 Symmetrie-saw-filter

Country Status (8)

Country Link
US (1) US7358832B2 (de)
EP (1) EP1808961B1 (de)
JP (1) JP4412326B2 (de)
KR (1) KR100861219B1 (de)
CN (1) CN101044678B (de)
AT (1) ATE403270T1 (de)
DE (1) DE602005008632D1 (de)
WO (1) WO2006049000A1 (de)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE602005014667D1 (de) * 2004-10-22 2009-07-09 Murata Manufacturing Co Elastik-oberflächenwellenfilter des ausgleichstyps
JP4412292B2 (ja) * 2006-02-06 2010-02-10 セイコーエプソン株式会社 弾性表面波装置および電子機器
JP4853520B2 (ja) * 2006-10-31 2012-01-11 株式会社村田製作所 弾性表面波フィルタ装置及びデュプレクサ
JP5135763B2 (ja) * 2006-11-01 2013-02-06 株式会社村田製作所 弾性表面波フィルタ装置及びデュプレクサ
US8031034B1 (en) * 2007-08-27 2011-10-04 Triquint Semiconductor, Inc. Surface acoustic wave filter and method for improved rejection
JP5099330B2 (ja) * 2007-09-07 2012-12-19 Ｔｄｋ株式会社 弾性表面波装置
JP4998617B2 (ja) * 2008-03-27 2012-08-15 株式会社村田製作所 弾性波フィルタ装置
JP5862761B2 (ja) * 2012-03-22 2016-02-16 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
CN105284050B (zh) 2013-06-13 2018-04-27 株式会社村田制作所 声表面波滤波器装置以及双工器

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3302477B2 (ja) 1993-12-20 2002-07-15 キンセキ株式会社 弾性表面波フィルタ
JPH08265087A (ja) * 1995-03-22 1996-10-11 Mitsubishi Electric Corp 弾性表面波フィルタ
US5835990A (en) * 1995-06-16 1998-11-10 Northern Telecom Limited Longitudinally coupled double mode surface wave resonators
JPH09167936A (ja) * 1995-10-13 1997-06-24 Fujitsu Ltd 弾性表面波装置
GB2306821B (en) * 1995-11-03 2000-05-31 Advanced Saw Prod Sa Electro-acoustic device
JP3186604B2 (ja) 1996-10-09 2001-07-11 株式会社村田製作所 弾性表面波フィルタ装置
JPH1197966A (ja) 1997-09-22 1999-04-09 Tdk Corp 弾性表面波フィルタ
JP2000091883A (ja) 1998-09-11 2000-03-31 Hitachi Media Electoronics Co Ltd 弾性表面波フィルタ
DE19938748B4 (de) * 1999-08-16 2007-02-01 Epcos Ag Dualmode-Oberflächenwellen-Filter mit verbesserter Symmetrie und erhöhter Sperrdämpfung
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
JP3391347B2 (ja) * 2000-06-26 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
TW483238B (en) * 2000-06-30 2002-04-11 Fujitsu Media Devices Ltd Surface acoustic wave device
JP2002300004A (ja) 2001-03-29 2002-10-11 Kyocera Corp 弾性表面波フィルタ
US6815868B2 (en) * 2001-04-09 2004-11-09 Murata Manufacturing Co., Ltd. Surface acoustic wave apparatus and communication unit
JP3952907B2 (ja) * 2002-08-28 2007-08-01 株式会社村田製作所 弾性表面波装置、通信装置
JP3931767B2 (ja) * 2002-08-29 2007-06-20 株式会社村田製作所 弾性表面波装置、通信装置
EP1670138B1 (de) * 2003-09-25 2009-05-27 Murata Manufacturing Co., Ltd. Akustischer wellenfilter und kommunikationseinheit
DE602005014667D1 (de) * 2004-10-22 2009-07-09 Murata Manufacturing Co Elastik-oberflächenwellenfilter des ausgleichstyps

Also Published As

Publication number Publication date
JP4412326B2 (ja) 2010-02-10
EP1808961A4 (de) 2007-12-05
US7358832B2 (en) 2008-04-15
CN101044678B (zh) 2010-05-05
CN101044678A (zh) 2007-09-26
KR100861219B1 (ko) 2008-09-30
DE602005008632D1 (de) 2008-09-11
EP1808961A1 (de) 2007-07-18
WO2006049000A1 (ja) 2006-05-11
JPWO2006049000A1 (ja) 2008-05-22
EP1808961B1 (de) 2008-07-30
US20070182511A1 (en) 2007-08-09
KR20070057270A (ko) 2007-06-04

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Legal Events

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