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DK0762644T3 - Akustisk bølgefilter med reducerede tab, stigefilter indeholdende samme samt en fremgangsmåde - Google Patents

Akustisk bølgefilter med reducerede tab, stigefilter indeholdende samme samt en fremgangsmåde

Info

Publication number
DK0762644T3
DK0762644T3 DK96114286T DK96114286T DK0762644T3 DK 0762644 T3 DK0762644 T3 DK 0762644T3 DK 96114286 T DK96114286 T DK 96114286T DK 96114286 T DK96114286 T DK 96114286T DK 0762644 T3 DK0762644 T3 DK 0762644T3
Authority
DK
Denmark
Prior art keywords
same
acoustic wave
reduced losses
wave filter
filter
Prior art date
Application number
DK96114286T
Other languages
English (en)
Inventor
David Penunuri
Thomas Slocum Hickernell
Original Assignee
Cts Corp
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 Cts Corp filed Critical Cts Corp
Application granted granted Critical
Publication of DK0762644T3 publication Critical patent/DK0762644T3/da

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
    • H03H9/6423—Means for obtaining a particular transfer characteristic
    • H03H9/6433—Coupled resonator filters
    • H03H9/6483—Ladder SAW filters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/42—Piezoelectric device making

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
DK96114286T 1995-09-11 1996-09-06 Akustisk bølgefilter med reducerede tab, stigefilter indeholdende samme samt en fremgangsmåde DK0762644T3 (da)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/526,340 US5638036A (en) 1995-09-11 1995-09-11 Acoustic wave ladder filter with unequal series and shunt transducer periodicities and method of making

Publications (1)

Publication Number Publication Date
DK0762644T3 true DK0762644T3 (da) 2001-11-12

Family

ID=24096933

Family Applications (1)

Application Number Title Priority Date Filing Date
DK96114286T DK0762644T3 (da) 1995-09-11 1996-09-06 Akustisk bølgefilter med reducerede tab, stigefilter indeholdende samme samt en fremgangsmåde

Country Status (5)

Country Link
US (1) US5638036A (da)
EP (1) EP0762644B1 (da)
JP (1) JPH09130204A (da)
DE (1) DE69614330T2 (da)
DK (1) DK0762644T3 (da)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3614234B2 (ja) * 1996-03-14 2005-01-26 沖電気工業株式会社 共振器型弾性表面波フィルタ
JPH10276062A (ja) * 1997-03-31 1998-10-13 Sanyo Electric Co Ltd 弾性表面波デバイス
DE19730710C2 (de) * 1997-07-17 2002-12-05 Epcos Ag Oberflächenwellenakustikfilter mit verbesserter Flankensteilheit
US5854579A (en) * 1997-08-25 1998-12-29 Motorola Inc. Saw filter using low-pass configuration and method of providing the same
US5933062A (en) * 1997-11-04 1999-08-03 Motorola Inc. Acoustic wave ladder filter with effectively increased coupling coefficient and method of providing same
JP3576367B2 (ja) * 1998-01-30 2004-10-13 沖電気工業株式会社 弾性表面波フィルタ
JP3228223B2 (ja) * 1998-05-26 2001-11-12 株式会社村田製作所 弾性表面波フィルタ
JP2000286675A (ja) * 1999-03-29 2000-10-13 Sanyo Electric Co Ltd 弾性表面波フィルター装置及びこれを具えた携帯電話機
US6570470B2 (en) * 2000-06-30 2003-05-27 Kyocera Corporation Surface acoustic wave ladder filter utilizing parallel resonators with different resonant frequencies
US6424238B1 (en) * 2001-01-08 2002-07-23 Motorola, Inc. Acoustic wave filter and method of forming the same
JP4056762B2 (ja) * 2002-02-25 2008-03-05 富士通メディアデバイス株式会社 弾性表面波装置
JP4544157B2 (ja) * 2003-07-30 2010-09-15 パナソニック株式会社 弾性表面波フィルタ
JP4622860B2 (ja) * 2004-01-09 2011-02-02 パナソニック株式会社 弾性表面波フィルタ
JP2009088999A (ja) * 2007-09-28 2009-04-23 Nippon Dempa Kogyo Co Ltd 弾性波フィルタ
US20090231060A1 (en) * 2008-03-11 2009-09-17 Rf Monolithics, Inc. Ladder resonator filter and related system
CN106253877B (zh) * 2011-11-30 2019-03-08 天工滤波方案日本有限公司 梯型弹性波滤波器和天线共用器
US10230350B2 (en) 2016-06-15 2019-03-12 Resonant Inc. Surface acoustic wave filters with extracted poles

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2800905B2 (ja) * 1991-10-28 1998-09-21 富士通株式会社 弾性表面波フィルタ
JPH06188673A (ja) * 1992-12-18 1994-07-08 Fujitsu Ltd 弾性表面波フィルタ
JP3191473B2 (ja) * 1993-03-09 2001-07-23 三菱電機株式会社 弾性表面波フィルタ
US5471178A (en) 1994-02-03 1995-11-28 Motorola, Inc. Ladder filter and method for producing conjugately matched impedance

Also Published As

Publication number Publication date
EP0762644B1 (en) 2001-08-08
JPH09130204A (ja) 1997-05-16
US5638036A (en) 1997-06-10
DE69614330T2 (de) 2002-05-23
EP0762644A1 (en) 1997-03-12
DE69614330D1 (de) 2001-09-13

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