JPS5610724A - Elastic surface wave transducer - Google Patents

Elastic surface wave transducer

Info

Publication number
JPS5610724A
JPS5610724A JP8588479A JP8588479A JPS5610724A JP S5610724 A JPS5610724 A JP S5610724A JP 8588479 A JP8588479 A JP 8588479A JP 8588479 A JP8588479 A JP 8588479A JP S5610724 A JPS5610724 A JP S5610724A
Authority
JP
Japan
Prior art keywords
electrode
reflecting
lambda
surface wave
elastic surface
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
JP8588479A
Other languages
Japanese (ja)
Other versions
JPS6231860B2 (en
Inventor
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 JP8588479A priority Critical patent/JPS5610724A/en
Publication of JPS5610724A publication Critical patent/JPS5610724A/en
Publication of JPS6231860B2 publication Critical patent/JPS6231860B2/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
    • H03H9/14544—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
    • H03H9/02535—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
    • 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
    • H03H9/14502—Surface acoustic wave [SAW] transducers for a particular purpose
    • H03H9/14505—Unidirectional SAW transducers

Landscapes

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

Abstract

PURPOSE:To eliminate the reflecting spuriousness by securing the prescribed combination of the widths between the electrode fingers of the both comb-line shape electrode and the prescribed distance between the electrode fingers. CONSTITUTION:Comb-teeth shaped electrode 22 is formed with electrode finger 23 possessing the lambda/8 width and electrode finger 24 possessing the 3lambda/8 width in combination, and the distance between the electrode fingers is set to lambda/8. Here lambda is the wavelength of the elastic surface wave. As a result, the phase of the compound vector of the reflecting components caused by the mismatching of the acoustic impedance of each electrode finger becomes reverse perfectly to the phase of the electrical reflecting component RE. Accordingly, the compound vector can be made zero. In such way, the reflecting spuriousness can be eliminated.
JP8588479A 1979-07-09 1979-07-09 Elastic surface wave transducer Granted JPS5610724A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8588479A JPS5610724A (en) 1979-07-09 1979-07-09 Elastic surface wave transducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8588479A JPS5610724A (en) 1979-07-09 1979-07-09 Elastic surface wave transducer

Publications (2)

Publication Number Publication Date
JPS5610724A true JPS5610724A (en) 1981-02-03
JPS6231860B2 JPS6231860B2 (en) 1987-07-10

Family

ID=13871326

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8588479A Granted JPS5610724A (en) 1979-07-09 1979-07-09 Elastic surface wave transducer

Country Status (1)

Country Link
JP (1) JPS5610724A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5883418A (en) * 1981-11-12 1983-05-19 Toshiba Corp Surface acoustic wave device
EP0147863A2 (en) * 1983-12-28 1985-07-10 Kabushiki Kaisha Toshiba Surface acoustic wave transducer
US4742319A (en) * 1986-06-21 1988-05-03 Alps Electric Co., Ltd. Surface-acoustic-wave resonator
US5438306A (en) * 1992-07-02 1995-08-01 Kazuhiko Yamanouchi Surface acoustic wave filter device with symmetrical electrode arrangement
US5818310A (en) * 1996-08-27 1998-10-06 Sawtek Inc. Series-block and line-width weighted saw filter device
US5831492A (en) * 1995-09-15 1998-11-03 Sawtek Inc. Weighted tapered spudt saw device
US6075426A (en) * 1998-05-14 2000-06-13 Fujitsu Limited Surface acoustic wave device with an angle α related to specific piezoelectric substrates
US6841918B2 (en) 2000-07-26 2005-01-11 Murata Manufacturing Co., Ltd. Surface acoustic wave device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01143327A (en) * 1987-11-30 1989-06-05 Tokyo Electron Ltd Dry etching system

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5883418A (en) * 1981-11-12 1983-05-19 Toshiba Corp Surface acoustic wave device
JPH0241925B2 (en) * 1981-11-12 1990-09-20
EP0147863A2 (en) * 1983-12-28 1985-07-10 Kabushiki Kaisha Toshiba Surface acoustic wave transducer
JPS60140917A (en) * 1983-12-28 1985-07-25 Toshiba Corp Surface acoustic wave transducer
US4742319A (en) * 1986-06-21 1988-05-03 Alps Electric Co., Ltd. Surface-acoustic-wave resonator
US5438306A (en) * 1992-07-02 1995-08-01 Kazuhiko Yamanouchi Surface acoustic wave filter device with symmetrical electrode arrangement
US5831492A (en) * 1995-09-15 1998-11-03 Sawtek Inc. Weighted tapered spudt saw device
US5818310A (en) * 1996-08-27 1998-10-06 Sawtek Inc. Series-block and line-width weighted saw filter device
US6075426A (en) * 1998-05-14 2000-06-13 Fujitsu Limited Surface acoustic wave device with an angle α related to specific piezoelectric substrates
US6841918B2 (en) 2000-07-26 2005-01-11 Murata Manufacturing Co., Ltd. Surface acoustic wave device
US6960866B2 (en) 2000-07-26 2005-11-01 Murata Manufacturing Co., Ltd. Surface acoustic wave device

Also Published As

Publication number Publication date
JPS6231860B2 (en) 1987-07-10

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