JPS5486251A - Elatic surface wave device - Google Patents

Elatic surface wave device

Info

Publication number
JPS5486251A
JPS5486251A JP15293377A JP15293377A JPS5486251A JP S5486251 A JPS5486251 A JP S5486251A JP 15293377 A JP15293377 A JP 15293377A JP 15293377 A JP15293377 A JP 15293377A JP S5486251 A JPS5486251 A JP S5486251A
Authority
JP
Japan
Prior art keywords
elastic surface
center line
propagation path
surface wave
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.)
Granted
Application number
JP15293377A
Other languages
Japanese (ja)
Other versions
JPS58686B2 (en
Inventor
Takeshi Hazama
Kentaro Hanma
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 JP52152933A priority Critical patent/JPS58686B2/en
Publication of JPS5486251A publication Critical patent/JPS5486251A/en
Publication of JPS58686B2 publication Critical patent/JPS58686B2/en
Expired 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
    • H03H9/02858—Means for compensation or elimination of undesirable effects of wave front distortion
    • 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

Landscapes

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

Abstract

PURPOSE:To solve all problems of wave-surface distortion, reflection at an electrode part, yield, etc., by making envelopes vertically symmetric on the center line of an elastic surface wave propagation path and by arranging electrodes with the width and gap reverse at upper and lower position on the center line of the propagation path. CONSTITUTION:Inter-digital transducers 10a and 10b are weighted with the cross width and envelopes formed as a result of the cross are vertically symmetric on center line 9 of the elastic surface wave propagation path. Further, the electrode width and electrode gap 8a and 8b between inter-digital transducer parts 7a and 7b which neither generates nor receives elastic surface waves are made nearly a half as long as the wavelength of elastic surface waves. For the purpose, the 1/2-wavelength electrode part and electrode gap are reversed over and under center line 9 of the elastic surface wave propagation path.
JP52152933A 1977-12-21 1977-12-21 surface acoustic wave device Expired JPS58686B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP52152933A JPS58686B2 (en) 1977-12-21 1977-12-21 surface acoustic wave device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP52152933A JPS58686B2 (en) 1977-12-21 1977-12-21 surface acoustic wave device

Publications (2)

Publication Number Publication Date
JPS5486251A true JPS5486251A (en) 1979-07-09
JPS58686B2 JPS58686B2 (en) 1983-01-07

Family

ID=15551305

Family Applications (1)

Application Number Title Priority Date Filing Date
JP52152933A Expired JPS58686B2 (en) 1977-12-21 1977-12-21 surface acoustic wave device

Country Status (1)

Country Link
JP (1) JPS58686B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5884517A (en) * 1981-11-16 1983-05-20 Toshiba Corp Surface acoustic wave transducer
JPS6181014A (en) * 1984-09-28 1986-04-24 Matsushita Electric Ind Co Ltd Surface acoustic wave device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5138852A (en) * 1974-08-02 1976-03-31 Philips Nv

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5138852A (en) * 1974-08-02 1976-03-31 Philips Nv

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5884517A (en) * 1981-11-16 1983-05-20 Toshiba Corp Surface acoustic wave transducer
JPH0245364B2 (en) * 1981-11-16 1990-10-09 Tokyo Shibaura Electric Co
JPS6181014A (en) * 1984-09-28 1986-04-24 Matsushita Electric Ind Co Ltd Surface acoustic wave device

Also Published As

Publication number Publication date
JPS58686B2 (en) 1983-01-07

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