DE69432134T2 - Akustisches Oberflächenwellenfilter - Google Patents

Akustisches Oberflächenwellenfilter

Info

Publication number
DE69432134T2
DE69432134T2 DE69432134T DE69432134T DE69432134T2 DE 69432134 T2 DE69432134 T2 DE 69432134T2 DE 69432134 T DE69432134 T DE 69432134T DE 69432134 T DE69432134 T DE 69432134T DE 69432134 T2 DE69432134 T2 DE 69432134T2
Authority
DE
Germany
Prior art keywords
wave filter
surface wave
acoustic surface
acoustic
filter
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.)
Expired - Lifetime
Application number
DE69432134T
Other languages
English (en)
Other versions
DE69432134D1 (de
Inventor
Dongpei Chen
Clinton S Hartmann
Serguei Kondratiev
Victor Plessky
Mohammed A Sharif
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.)
TDK Electronics AG
Original Assignee
Tekelec Temex
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 Tekelec Temex filed Critical Tekelec Temex
Application granted granted Critical
Publication of DE69432134D1 publication Critical patent/DE69432134D1/de
Publication of DE69432134T2 publication Critical patent/DE69432134T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H03H9/46—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
    • H03H9/46—Filters
    • H03H9/64—Filters using surface acoustic waves
    • H03H9/6489—Compensation of undesirable effects
    • H03H9/6493—Side lobe suppression

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
DE69432134T 1993-08-04 1994-07-20 Akustisches Oberflächenwellenfilter Expired - Lifetime DE69432134T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9316142A GB2280807B (en) 1993-08-04 1993-08-04 Saw filter

Publications (2)

Publication Number Publication Date
DE69432134D1 DE69432134D1 (de) 2003-03-27
DE69432134T2 true DE69432134T2 (de) 2003-10-09

Family

ID=10739946

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69432134T Expired - Lifetime DE69432134T2 (de) 1993-08-04 1994-07-20 Akustisches Oberflächenwellenfilter

Country Status (5)

Country Link
US (1) US5610566A (de)
EP (1) EP0637873B1 (de)
JP (1) JPH0766677A (de)
DE (1) DE69432134T2 (de)
GB (1) GB2280807B (de)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2312109B (en) * 1996-03-29 2000-08-02 Advanced Saw Prod Sa Acoustic wave filter
EP1326333B1 (de) * 1997-02-12 2008-08-20 Oki Electric Industry Co., Ltd. Akustische Oberflächenwellenfilter mit durch Impedanzschaltungen erzeugten Dämpfungspolen
US5933062A (en) * 1997-11-04 1999-08-03 Motorola Inc. Acoustic wave ladder filter with effectively increased coupling coefficient and method of providing same
JP3371849B2 (ja) * 1999-04-28 2003-01-27 株式会社村田製作所 Ｓａｗ共振子、複合ｓａｗフィルタ及びｓａｗフィルタ
FI116188B (fi) * 1999-06-08 2005-09-30 Valtion Teknillinen Menetelmä ja laitteisto kohteiden sähkömagneettisen energian muuttamiseksi
DE10007178A1 (de) * 2000-02-17 2001-08-23 Epcos Ag Oberflächenwellenfilter mit Reaktanzelementen
JP3467472B2 (ja) * 2000-11-15 2003-11-17 富士通株式会社 弾性表面波フィルタ
US6798318B1 (en) 2001-04-27 2004-09-28 Sawtek, Inc. Hybrid leaky surface acoustic wave resonator filter
US6861927B1 (en) 2001-04-27 2005-03-01 Sawtek, Inc. Longitudinally coupled leaky surface acoustic wave resonator filter
US20030016735A1 (en) * 2001-07-23 2003-01-23 Edmonson Peter J. Communication system for two-way exchange of information
US6924715B2 (en) * 2002-02-12 2005-08-02 Nortel Networks Limited Band reject filters
US6710677B2 (en) * 2002-02-12 2004-03-23 Nortel Networks Limited Band reject filters
DE102009002497B4 (de) 2009-04-20 2011-06-16 Leibniz-Institut Für Festkörper- Und Werkstoffforschung Dresden E.V. Verfahren zur Ermittlung elektrischer und mechanischer Materialeigenschaften

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4006290A (en) * 1974-08-12 1977-02-01 Gte Sylvania Incorporated Surface wave frequency selective device
US4166258A (en) * 1974-08-29 1979-08-28 International Business Machines Corporation Thin-film integrated circuit with tank circuit characteristics and applications to thin-film filters and oscillators
JPS51142943A (en) * 1975-06-03 1976-12-08 Nippon Telegr & Teleph Corp <Ntt> Elastic surface-wave filter
JPS5219044A (en) * 1975-08-04 1977-01-14 Nippon Telegr & Teleph Corp <Ntt> Surface acoustic wave filter
JPS5997216A (ja) * 1982-11-26 1984-06-05 Nec Corp 弾性表面波フイルタ
US4785270A (en) * 1987-12-30 1988-11-15 Motorola Inc. Monolithic lattice saw filter
JPH03222511A (ja) * 1990-01-29 1991-10-01 Oki Electric Ind Co Ltd Ｓａｗ共振器フィルタ
JP2888493B2 (ja) * 1990-06-21 1999-05-10 株式会社村田製作所 縦型２重モード弾性表面波フィルタ
US5093638A (en) * 1990-11-05 1992-03-03 Motorola, Inc. Unbalanced saw filter
JP2800905B2 (ja) * 1991-10-28 1998-09-21 富士通株式会社 弾性表面波フィルタ
US5254962A (en) * 1992-06-19 1993-10-19 Motorola, Inc. Combined acoustic wave device and ceramic block filter structure
DE69323163T2 (de) * 1992-12-01 1999-06-02 Japan Radio Co Ltd Akustischer Oberflächenwellenfilter und mobiles Kommunikationssystem mit solchem Filter
JP3189508B2 (ja) * 1993-07-08 2001-07-16 株式会社村田製作所 弾性表面波フィルタ
JP3139225B2 (ja) * 1993-07-08 2001-02-26 株式会社村田製作所 弾性表面波フィルタ

Also Published As

Publication number Publication date
GB2280807B (en) 1997-10-22
US5610566A (en) 1997-03-11
DE69432134D1 (de) 2003-03-27
JPH0766677A (ja) 1995-03-10
EP0637873A3 (de) 1995-07-05
GB9316142D0 (en) 1993-09-22
GB2280807A (en) 1995-02-08
EP0637873A2 (de) 1995-02-08
EP0637873B1 (de) 2003-02-19

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8328 Change in the person/name/address of the agent

Representative=s name: EPPING HERMANN FISCHER, PATENTANWALTSGESELLSCHAFT

8327 Change in the person/name/address of the patent owner

Owner name: ALEX TEMEX MULTIMEDIA, SEVRES, FR

8328 Change in the person/name/address of the agent

Representative=s name: DERZEIT KEIN VERTRETER BESTELLT

8327 Change in the person/name/address of the patent owner

Owner name: TEMEX, SOPHIA ANTIPOLIS, FR

8327 Change in the person/name/address of the patent owner

Owner name: EPCOS AG, 81669 MUENCHEN, DE