WO2009050988A1 - バランス型弾性波フィルタ装置及び複合フィルタ - Google Patents

バランス型弾性波フィルタ装置及び複合フィルタ Download PDF

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Publication number
WO2009050988A1
WO2009050988A1 PCT/JP2008/067200 JP2008067200W WO2009050988A1 WO 2009050988 A1 WO2009050988 A1 WO 2009050988A1 JP 2008067200 W JP2008067200 W JP 2008067200W WO 2009050988 A1 WO2009050988 A1 WO 2009050988A1
Authority
WO
WIPO (PCT)
Prior art keywords
acoustic wave
surface acoustic
wave filter
terminal
idts
Prior art date
Application number
PCT/JP2008/067200
Other languages
English (en)
French (fr)
Inventor
Junpei Yasuda
Original Assignee
Murata Manufacturing 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 Murata Manufacturing Co., Ltd. filed Critical Murata Manufacturing Co., Ltd.
Priority to DE112008002700.5T priority Critical patent/DE112008002700B9/de
Priority to JP2009538022A priority patent/JP4947151B2/ja
Priority to CN2008801108321A priority patent/CN101821945B/zh
Publication of WO2009050988A1 publication Critical patent/WO2009050988A1/ja
Priority to US12/749,661 priority patent/US7940147B2/en

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
    • H03H9/0023—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
    • H03H9/0023—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
    • H03H9/0023—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
    • H03H9/0052—Balance-unbalance or balance-balance networks using surface acoustic wave devices having two acoustic tracks being electrically cascaded
    • H03H9/0061—Balance-unbalance or balance-balance networks 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 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
    • H03H9/14588—Horizontally-split transducers

Landscapes

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

Abstract

　通過帯域よりも高域側における第１，第２の平衡端子間の平衡度及び減衰特性の差動特性が改善された弾性波フィルタ装置を得る。 　第１，第２の弾性波フィルタ素子１３，１４が不平衡端子９に並列に接続されており、第１～第３のＩＤＴ２１～２３の内、第２，第３のＩＤＴ２２，２３が第１の平衡端子１０に、第４～第６のＩＤＴ２４～２６の内、第５，第６のＩＤＴ２５，２６が第２の平衡端子１１に接続されており、第１のアース端子６１が、不平衡端子９側であって、第１の弾性波フィルタ素子１３側に寄せられて配置されており、第１，第２の弾性波フィルタ素子１３，１４間の中心に対し第１のアース端子６１と点対称に第３のアース端子６５が配置されている、弾性波フィルタ装置４。
PCT/JP2008/067200 2007-10-17 2008-09-24 バランス型弾性波フィルタ装置及び複合フィルタ WO2009050988A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE112008002700.5T DE112008002700B9 (de) 2007-10-17 2008-09-24 Symmetrische Schallwellenfiltervorrichtung und Wellenparameterfilter
JP2009538022A JP4947151B2 (ja) 2007-10-17 2008-09-24 バランス型弾性波フィルタ装置及び複合フィルタ
CN2008801108321A CN101821945B (zh) 2007-10-17 2008-09-24 平衡型声波滤波装置及复合滤波器
US12/749,661 US7940147B2 (en) 2007-10-17 2010-03-30 Balanced acoustic wave filter device and composite filter

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-270298 2007-10-17
JP2007270298 2007-10-17

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US12/749,661 Continuation US7940147B2 (en) 2007-10-17 2010-03-30 Balanced acoustic wave filter device and composite filter

Publications (1)

Publication Number Publication Date
WO2009050988A1 true WO2009050988A1 (ja) 2009-04-23

Family

ID=40567261

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/067200 WO2009050988A1 (ja) 2007-10-17 2008-09-24 バランス型弾性波フィルタ装置及び複合フィルタ

Country Status (5)

Country Link
US (1) US7940147B2 (ja)
JP (1) JP4947151B2 (ja)
CN (1) CN101821945B (ja)
DE (1) DE112008002700B9 (ja)
WO (1) WO2009050988A1 (ja)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10110201B2 (en) * 2015-09-16 2018-10-23 Airoha Technology Corp. Surface acoustic wave filter devices
CN112511124A (zh) * 2021-02-07 2021-03-16 成都频岢微电子有限公司 用于改善dms型接收滤波器带外抑制的接地结构及滤波器

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
JP2004235908A (ja) * 2003-01-30 2004-08-19 Kyocera Corp 弾性表面波装置及びそれを用いた通信機
WO2006003787A1 (ja) * 2004-06-30 2006-01-12 Murata Manufacturing Co., Ltd. バランス型弾性波フィルタ及び弾性波フィルタ装置
WO2006009021A1 (ja) * 2004-07-23 2006-01-26 Murata Manufacturing Co., Ltd. 弾性表面波装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10013861A1 (de) * 2000-03-21 2001-09-27 Epcos Ag Dualmode-Oberflächenwellenfilter mit verbesserter Symmetrie und erhöhter Sperrdämpfung
JP2004304513A (ja) * 2003-03-31 2004-10-28 Matsushita Electric Ind Co Ltd 弾性表面波装置
CN100490322C (zh) * 2004-12-20 2009-05-20 株式会社村田制作所 平衡型声波滤波器装置
CN1976222B (zh) * 2005-11-30 2011-09-21 京瓷株式会社 声表面波元件、声表面波装置以及具有它的通信装置
JP4655161B2 (ja) * 2007-05-22 2011-03-23 株式会社村田製作所 バランス型弾性波フィルタ装置及び複合フィルタ

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
JP2004235908A (ja) * 2003-01-30 2004-08-19 Kyocera Corp 弾性表面波装置及びそれを用いた通信機
WO2006003787A1 (ja) * 2004-06-30 2006-01-12 Murata Manufacturing Co., Ltd. バランス型弾性波フィルタ及び弾性波フィルタ装置
WO2006009021A1 (ja) * 2004-07-23 2006-01-26 Murata Manufacturing Co., Ltd. 弾性表面波装置

Also Published As

Publication number Publication date
CN101821945A (zh) 2010-09-01
JP4947151B2 (ja) 2012-06-06
US20100176901A1 (en) 2010-07-15
DE112008002700B9 (de) 2015-04-02
JPWO2009050988A1 (ja) 2011-03-03
US7940147B2 (en) 2011-05-10
DE112008002700T5 (de) 2010-08-26
CN101821945B (zh) 2012-11-07
DE112008002700B4 (de) 2015-03-26

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