JPS5436157A - Elasic surface wave filter - Google Patents

Elasic surface wave filter

Info

Publication number
JPS5436157A
JPS5436157A JP10298177A JP10298177A JPS5436157A JP S5436157 A JPS5436157 A JP S5436157A JP 10298177 A JP10298177 A JP 10298177A JP 10298177 A JP10298177 A JP 10298177A JP S5436157 A JPS5436157 A JP S5436157A
Authority
JP
Japan
Prior art keywords
elasic
wave filter
surface wave
ripple
radiation
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.)
Granted
Application number
JP10298177A
Other languages
Japanese (ja)
Other versions
JPS5740684B2 (en
Inventor
Katsuhide Tsukamoto
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP10298177A priority Critical patent/JPS5436157A/en
Publication of JPS5436157A publication Critical patent/JPS5436157A/en
Publication of JPS5740684B2 publication Critical patent/JPS5740684B2/ja
Granted 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
    • H03H9/02—Details
    • H03H9/125—Driving means, e.g. electrodes, coils
    • H03H9/145—Driving means, e.g. electrodes, coils for networks using surface acoustic waves
    • H03H9/14517—Means for weighting
    • H03H9/1452—Means for weighting by finger overlap length, apodisation
    • 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
    • H03H9/14594—Plan-rotated or plan-tilted 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
    • H03H9/46—Filters
    • H03H9/64—Filters using surface acoustic waves
    • H03H9/6489—Compensation of undesirable effects
    • H03H9/6496—Reducing ripple in transfer characteristic
    • 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
    • H03H9/14517—Means for weighting
    • H03H9/14526—Finger withdrawal

Landscapes

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

Abstract

PURPOSE:To obtain excellent performance less in the ripple in the band, by approximately making equal the effective electrode finger distance to the radiation of elastic surface waves over the entire transducer weighted.
JP10298177A 1977-08-26 1977-08-26 Elasic surface wave filter Granted JPS5436157A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10298177A JPS5436157A (en) 1977-08-26 1977-08-26 Elasic surface wave filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10298177A JPS5436157A (en) 1977-08-26 1977-08-26 Elasic surface wave filter

Publications (2)

Publication Number Publication Date
JPS5436157A true JPS5436157A (en) 1979-03-16
JPS5740684B2 JPS5740684B2 (en) 1982-08-30

Family

ID=14341896

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10298177A Granted JPS5436157A (en) 1977-08-26 1977-08-26 Elasic surface wave filter

Country Status (1)

Country Link
JP (1) JPS5436157A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5664918A (en) * 1979-10-30 1981-06-02 Tokyo Shibaura Electric Co Bundling device for paper sheet

Also Published As

Publication number Publication date
JPS5740684B2 (en) 1982-08-30

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