JPS56123121A - Elastic surface wave device - Google Patents

Elastic surface wave device

Info

Publication number
JPS56123121A
JPS56123121A JP2672880A JP2672880A JPS56123121A JP S56123121 A JPS56123121 A JP S56123121A JP 2672880 A JP2672880 A JP 2672880A JP 2672880 A JP2672880 A JP 2672880A JP S56123121 A JPS56123121 A JP S56123121A
Authority
JP
Japan
Prior art keywords
electrodes
lambda
comb
grounded
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.)
Pending
Application number
JP2672880A
Other languages
Japanese (ja)
Inventor
Takao Chiba
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.)
Japan Broadcasting Corp
Original Assignee
Nippon Hoso Kyokai NHK
Japan Broadcasting Corp
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 Nippon Hoso Kyokai NHK, Japan Broadcasting Corp filed Critical Nippon Hoso Kyokai NHK
Priority to JP2672880A priority Critical patent/JPS56123121A/en
Publication of JPS56123121A publication Critical patent/JPS56123121A/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
    • H03H9/02228—Guided bulk acoustic wave devices or Lamb wave devices having interdigital transducers situated in parallel planes on either side of a piezoelectric layer
    • 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
    • H03H9/14508—Polyphase SAW transducers

Landscapes

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

Abstract

PURPOSE:To obtain a unidirectional low-loss elastic surface device by providing electrodes, shifting in wavelength by a quarter, on both the surfaces of a thin film made of a piezoelectric material by turns. CONSTITUTION:On the reverse surface of piezoelectric-material thin layer 2 adhered onto substrate 3, comb-shaped electrodes 1 arrayed in parallel at intervals lambda/4 are provided; every other electrode 1 is grounded in common and the others are applied with a 0-phase signal. On the top surface of thin layer 2, comb-shaped electrodes 1 shifting in center distance by lambda/4 from electrodes 1 on the reverse surface are provided; every other electrode 1 is grounded in common, and the others are applied with a signal lagging in phase by 90 degrees. Thus, the unidirectional low-loss device can be obtained.
JP2672880A 1980-03-05 1980-03-05 Elastic surface wave device Pending JPS56123121A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2672880A JPS56123121A (en) 1980-03-05 1980-03-05 Elastic surface wave device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2672880A JPS56123121A (en) 1980-03-05 1980-03-05 Elastic surface wave device

Publications (1)

Publication Number Publication Date
JPS56123121A true JPS56123121A (en) 1981-09-28

Family

ID=12201374

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2672880A Pending JPS56123121A (en) 1980-03-05 1980-03-05 Elastic surface wave device

Country Status (1)

Country Link
JP (1) JPS56123121A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5738017A (en) * 1980-08-18 1982-03-02 Fujitsu General Ltd Unidirectional saw energizing device
JPS57155820A (en) * 1981-03-20 1982-09-27 Fujitsu General Ltd Unidirectional saw exciter

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54129896A (en) * 1977-03-26 1979-10-08 Kimio Shibayama Piezooelectric thin film blind electrode elastic surface wave converter

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54129896A (en) * 1977-03-26 1979-10-08 Kimio Shibayama Piezooelectric thin film blind electrode elastic surface wave converter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5738017A (en) * 1980-08-18 1982-03-02 Fujitsu General Ltd Unidirectional saw energizing device
JPS57155820A (en) * 1981-03-20 1982-09-27 Fujitsu General Ltd Unidirectional saw exciter

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