JPS54146991A - Elastic surface wave device - Google Patents

Elastic surface wave device

Info

Publication number
JPS54146991A
JPS54146991A JP5451378A JP5451378A JPS54146991A JP S54146991 A JPS54146991 A JP S54146991A JP 5451378 A JP5451378 A JP 5451378A JP 5451378 A JP5451378 A JP 5451378A JP S54146991 A JPS54146991 A JP S54146991A
Authority
JP
Japan
Prior art keywords
electrode
crossing
width
wave
crossing part
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
JP5451378A
Other languages
Japanese (ja)
Other versions
JPS6138647B2 (en
Inventor
Kazuyuki Nagatsuma
Jun Yamada
Hitoshi Yanagihara
Takeshi Hazama
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP5451378A priority Critical patent/JPS54146991A/en
Publication of JPS54146991A publication Critical patent/JPS54146991A/en
Publication of JPS6138647B2 publication Critical patent/JPS6138647B2/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
    • H03H9/02535—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
    • H03H9/125—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
    • H03H9/14552—Transducers of particular shape or position comprising split fingers

Landscapes

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

Abstract

PURPOSE:To reduce the needless reflection in an electrode to improve frequency and time characteristics by setting the electrode width of a single-structure electrode non-crossing part so that the wave surface of a double finger-structure electrode part may be prevented from being shifted and arranging adjacent non-crossing parts in no parallel to each other. CONSTITUTION:In the elastic surface wave device provided with a combshaped electrode having an irregular crossing width, weighting electrode 41 and reguler-form electrode 41 are formed in the surface of piezoelectric substrate 40 by the photo lithography techneque, and a double finger structure to change the crossing width and the electrode width is given to the crossing part of weighting electrode 41 so that the impulse, which can be subjected to Fourier conversion on a basis of a prescribed frequency characteristic, may be generated. The electrode width of a single- structure electrode non-crossing part is so set that the wave surface of the surface wave, which is propagated through the double finger-structure electrode crossing part, and the wave surface of the surface wave, which is propagated through the electrode non-crossing part, may be prevented from being shifted, and adjacent electrode non-crossing parts are arranged in no parallel to each other.
JP5451378A 1978-05-10 1978-05-10 Elastic surface wave device Granted JPS54146991A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5451378A JPS54146991A (en) 1978-05-10 1978-05-10 Elastic surface wave device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5451378A JPS54146991A (en) 1978-05-10 1978-05-10 Elastic surface wave device

Publications (2)

Publication Number Publication Date
JPS54146991A true JPS54146991A (en) 1979-11-16
JPS6138647B2 JPS6138647B2 (en) 1986-08-30

Family

ID=12972717

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5451378A Granted JPS54146991A (en) 1978-05-10 1978-05-10 Elastic surface wave device

Country Status (1)

Country Link
JP (1) JPS54146991A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5656024A (en) * 1979-10-11 1981-05-16 Murata Mfg Co Ltd Elastic surface wave device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5656024A (en) * 1979-10-11 1981-05-16 Murata Mfg Co Ltd Elastic surface wave device
JPS6225288B2 (en) * 1979-10-11 1987-06-02 Murata Manufacturing Co

Also Published As

Publication number Publication date
JPS6138647B2 (en) 1986-08-30

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