BE878757A - Dispositif a ondes de surface, a suppression amelioree des signaux parasites - Google Patents

Dispositif a ondes de surface, a suppression amelioree des signaux parasites

Info

Publication number
BE878757A
BE878757A BE0/197126A BE197126A BE878757A BE 878757 A BE878757 A BE 878757A BE 0/197126 A BE0/197126 A BE 0/197126A BE 197126 A BE197126 A BE 197126A BE 878757 A BE878757 A BE 878757A
Authority
BE
Belgium
Prior art keywords
surface waves
improved suppression
waves device
parasite signals
parasite
Prior art date
Application number
BE0/197126A
Other languages
English (en)
Original Assignee
Siemens Ag
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 Siemens Ag filed Critical Siemens Ag
Publication of BE878757A publication Critical patent/BE878757A/fr

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
    • H03H9/02—Details
    • H03H9/02535—Details of surface acoustic wave devices
    • H03H9/02637—Details concerning reflective or coupling arrays
    • 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
    • H03H9/02842—Means for compensation or elimination of undesirable effects of reflections
    • 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
    • H03H9/02842—Means for compensation or elimination of undesirable effects of reflections
    • H03H9/0285—Means for compensation or elimination of undesirable effects of reflections of triple transit echo
    • 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
    • H03H9/14547—Fan shaped; Tilted; Shifted; Slanted; Tapered; Arched; Stepped finger transducers
    • 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
    • H03H9/14573—Arrow type transducers

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
BE0/197126A 1978-09-13 1979-09-12 Dispositif a ondes de surface, a suppression amelioree des signaux parasites BE878757A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2839851A DE2839851C2 (de) 1978-09-13 1978-09-13 Oberflächenwellenanordnung mit verbesserter Störsignalunterdrückung

Publications (1)

Publication Number Publication Date
BE878757A true BE878757A (fr) 1979-12-31

Family

ID=6049354

Family Applications (1)

Application Number Title Priority Date Filing Date
BE0/197126A BE878757A (fr) 1978-09-13 1979-09-12 Dispositif a ondes de surface, a suppression amelioree des signaux parasites

Country Status (7)

Country Link
US (1) US4263569A (fr)
JP (1) JPS5541097A (fr)
BE (1) BE878757A (fr)
DE (1) DE2839851C2 (fr)
FR (1) FR2436529A1 (fr)
GB (1) GB2030412B (fr)
IT (1) IT1122958B (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5693414A (en) * 1979-12-27 1981-07-29 Fujitsu Ltd Elastic surface wave element
GB2090093A (en) * 1980-12-19 1982-06-30 Philips Electronic Associated Acoustic wave devices
US4393358A (en) * 1981-11-18 1983-07-12 Zenith Radio Corporation Surface wave acoustic device with compensation for diffraction effects
DE3208252A1 (de) * 1982-03-08 1983-09-15 Siemens AG, 1000 Berlin und 8000 München Interdigitalwandler mit unterdrueckung reflektierter stoersignale
JPS63156412A (ja) * 1986-12-19 1988-06-29 Sanyo Electric Co Ltd 表面波フイルタ装置
DE3731309A1 (de) * 1987-09-17 1989-03-30 Siemens Ag Oberflaechenwellenanordnung mit konversionsstruktur zur vermeidung unerwuenschter reflektierter wellen
JPH01134924U (fr) * 1988-03-09 1989-09-14
DE4010310A1 (de) * 1990-03-30 1991-10-02 Siemens Ag Oberflaechenwellenwandler, insbesondere in splitfinger-ausfuehrung, mit unterdrueckung von reflexionen endstaendiger wandlerfinger
DE4212517C2 (de) * 1992-04-14 1995-02-23 Siemens Ag Oberflächenwellenanordnung mit mindestens zwei in Richtung der Hauptwellenausbreitung benachbarten Oberflächenwellen-Strukturen
JPH07212177A (ja) * 1994-01-14 1995-08-11 Murata Mfg Co Ltd 表面波フィルタ
JP3934544B2 (ja) * 2002-04-11 2007-06-20 富士通株式会社 弾性波観測装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3573673A (en) * 1969-01-08 1971-04-06 Zenith Radio Corp Acoustic surface wave filters
US3680007A (en) * 1970-09-30 1972-07-25 Ibm Surface wave transducer for digital signals
US3872410A (en) * 1972-12-04 1975-03-18 Gte Laboratories Inc Surface wave filter for tv if stage
AT341578B (de) * 1975-12-19 1978-02-10 Hans Dr Kuzmany Elektroakustischer wandler zur elektrischen anregung einer akustischen oberflachenwelle bzw. zur akustischen anregung einer elektrischen welle durch den piezoelektrischen effekt
DE2618144C3 (de) * 1976-04-26 1980-11-06 Siemens Ag, 1000 Berlin Und 8000 Muenchen Wandlerelektroden für Filter oder Verzögerungsleitungen nach dem Oberflächenwellenprinzip
JPS54844A (en) * 1977-06-03 1979-01-06 Matsushita Electric Ind Co Ltd Elastic surface wave filter
SU726648A1 (ru) * 1977-07-22 1980-04-05 Ордена Трудового Красного Знамени Институт Радиотехники И Электроники Ан Ссср Устройство на поверхностных акустических волнах

Also Published As

Publication number Publication date
US4263569A (en) 1981-04-21
IT1122958B (it) 1986-04-30
GB2030412B (en) 1983-03-02
DE2839851C2 (de) 1980-09-25
GB2030412A (en) 1980-04-02
IT7925462A0 (it) 1979-09-04
DE2839851B1 (de) 1979-12-06
FR2436529A1 (fr) 1980-04-11
JPS5541097A (en) 1980-03-22

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