JPS53114644A - Elastic surface wave filter - Google Patents

Elastic surface wave filter

Info

Publication number
JPS53114644A
JPS53114644A JP2859677A JP2859677A JPS53114644A JP S53114644 A JPS53114644 A JP S53114644A JP 2859677 A JP2859677 A JP 2859677A JP 2859677 A JP2859677 A JP 2859677A JP S53114644 A JPS53114644 A JP S53114644A
Authority
JP
Japan
Prior art keywords
wave filter
surface wave
elastic surface
aperture length
digital electrode
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.)
Pending
Application number
JP2859677A
Other languages
Japanese (ja)
Inventor
Sadao Takahashi
Riichi Kodama
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP2859677A priority Critical patent/JPS53114644A/en
Publication of JPS53114644A publication Critical patent/JPS53114644A/en
Pending 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
    • H03H9/02535—Details of surface acoustic wave devices
    • H03H9/02818—Means for compensation or elimination of undesirable effects
    • H03H9/02881—Means for compensation or elimination of undesirable effects of diffraction of wave beam
    • 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
    • H03H9/02614—Treatment of substrates, e.g. curved, spherical, cylindrical substrates ensuring closed round-about circuits for the acoustical waves
    • H03H9/02629—Treatment of substrates, e.g. curved, spherical, cylindrical substrates ensuring closed round-about circuits for the acoustical waves of the edges
    • 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

Landscapes

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

Abstract

PURPOSE:To change frequency characteristic near the vertical trap of a surface wave filter by varying the ratio of the aperture length of an input inter-digital electrode to the aperture length of an output inter-digital electrode relatively within 1alpha,05 to 1,5.
JP2859677A 1977-03-17 1977-03-17 Elastic surface wave filter Pending JPS53114644A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2859677A JPS53114644A (en) 1977-03-17 1977-03-17 Elastic surface wave filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2859677A JPS53114644A (en) 1977-03-17 1977-03-17 Elastic surface wave filter

Publications (1)

Publication Number Publication Date
JPS53114644A true JPS53114644A (en) 1978-10-06

Family

ID=12252961

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2859677A Pending JPS53114644A (en) 1977-03-17 1977-03-17 Elastic surface wave filter

Country Status (1)

Country Link
JP (1) JPS53114644A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7061346B2 (en) * 2001-04-30 2006-06-13 Epcos Ag Transversal filter comprising an improved notch characteristic curve
US7372347B2 (en) 2003-11-18 2008-05-13 Fujitsu Media Devices Limited Surface acoustic wave device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS504116A (en) * 1973-03-13 1975-01-17

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS504116A (en) * 1973-03-13 1975-01-17

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7061346B2 (en) * 2001-04-30 2006-06-13 Epcos Ag Transversal filter comprising an improved notch characteristic curve
US7372347B2 (en) 2003-11-18 2008-05-13 Fujitsu Media Devices Limited Surface acoustic wave device

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