JPS5487458A - Surface elastic wave propagation unit - Google Patents

Surface elastic wave propagation unit

Info

Publication number
JPS5487458A
JPS5487458A JP15781277A JP15781277A JPS5487458A JP S5487458 A JPS5487458 A JP S5487458A JP 15781277 A JP15781277 A JP 15781277A JP 15781277 A JP15781277 A JP 15781277A JP S5487458 A JPS5487458 A JP S5487458A
Authority
JP
Japan
Prior art keywords
elastic
waves
coupler
path
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
JP15781277A
Other languages
Japanese (ja)
Inventor
Michitoshi Onishi
Masahiro Yoshino
Yukinori Kuwano
Masakazu Umetani
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.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo 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 Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP15781277A priority Critical patent/JPS5487458A/en
Publication of JPS5487458A publication Critical patent/JPS5487458A/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
    • H03H9/30—Time-delay networks
    • H03H9/42—Time-delay networks using surface acoustic waves

Landscapes

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

Abstract

PURPOSE:To obtain the desired delay time without damping surface-wave energy by providing a multistrip coupler between an exciting electrode and receiving electrode provided onto a substrate and a metal thin film to the path of elastic surface waves branched by the coupler. CONSTITUTION:Onto the surface of substrate 10 which allows elastic surface waves to propagate on its surface, exciting electrode 11 driving surface elastic waves by applying an electric signal and receiving electrode 13 receiving surface elastic waves are both provided. Onto the propagation path of elastic surface waves between exciting electrode 11 and receiving electrode 13, multistrip coupler 12 is provided which devides surface elastic waves into two; and one devided surface elastic waves are applied to receiving electrode 13 and on the path of elastic surface waves between the other exciting electrode 11 and coupler 12, metal thin film 14 is arranged, which causes a phase difference of pi/2, so as to obtain the desired delay time without damping elastic surface wave energy. A propagation-path change ratio at which this coupler 12 branches the propagation path of surface elastic waves is fixed to 50%.
JP15781277A 1977-12-23 1977-12-23 Surface elastic wave propagation unit Pending JPS5487458A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15781277A JPS5487458A (en) 1977-12-23 1977-12-23 Surface elastic wave propagation unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15781277A JPS5487458A (en) 1977-12-23 1977-12-23 Surface elastic wave propagation unit

Publications (1)

Publication Number Publication Date
JPS5487458A true JPS5487458A (en) 1979-07-11

Family

ID=15657821

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15781277A Pending JPS5487458A (en) 1977-12-23 1977-12-23 Surface elastic wave propagation unit

Country Status (1)

Country Link
JP (1) JPS5487458A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01180110A (en) * 1987-04-21 1989-07-18 Canon Inc Surface acoustic wave convolver

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01180110A (en) * 1987-04-21 1989-07-18 Canon Inc Surface acoustic wave convolver

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