JPS5326552A - Elasti c surface wave element - Google Patents

Elasti c surface wave element

Info

Publication number
JPS5326552A
JPS5326552A JP10049776A JP10049776A JPS5326552A JP S5326552 A JPS5326552 A JP S5326552A JP 10049776 A JP10049776 A JP 10049776A JP 10049776 A JP10049776 A JP 10049776A JP S5326552 A JPS5326552 A JP S5326552A
Authority
JP
Japan
Prior art keywords
elasti
surface wave
wave element
varyign
threetime
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
JP10049776A
Other languages
Japanese (ja)
Inventor
Noboru Wakatsuki
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP10049776A priority Critical patent/JPS5326552A/en
Publication of JPS5326552A publication Critical patent/JPS5326552A/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
    • H03H9/02535—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
    • H03H9/0285—Means for compensation or elimination of undesirable effects of reflections of triple transit echo
    • 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
    • H03H9/02637—Details concerning reflective or coupling arrays
    • H03H9/02779—Continuous surface reflective arrays
    • 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
    • H03H9/14564—Shifted fingers 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
    • H03H9/125—Driving means, e.g. electrodes, coils
    • H03H9/145—Driving means, e.g. electrodes, coils for networks using surface acoustic waves
    • H03H9/14517—Means for weighting
    • H03H9/1452—Means for weighting by finger overlap length, apodisation
    • 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

Landscapes

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

Abstract

PURPOSE:By varyign the length of a phase film, the pahses of reflected waves are shifted between the 1st and 2nd transmission lines in order to suppress a threetime propagative reflected wave, thereby obtaining the reduced loss and simplified constitution.
JP10049776A 1976-08-25 1976-08-25 Elasti c surface wave element Pending JPS5326552A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10049776A JPS5326552A (en) 1976-08-25 1976-08-25 Elasti c surface wave element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10049776A JPS5326552A (en) 1976-08-25 1976-08-25 Elasti c surface wave element

Publications (1)

Publication Number Publication Date
JPS5326552A true JPS5326552A (en) 1978-03-11

Family

ID=14275555

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10049776A Pending JPS5326552A (en) 1976-08-25 1976-08-25 Elasti c surface wave element

Country Status (1)

Country Link
JP (1) JPS5326552A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5111545A (en) * 1974-07-19 1976-01-29 Sharp Kk HYOMENHADENPASOCHI

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5111545A (en) * 1974-07-19 1976-01-29 Sharp Kk HYOMENHADENPASOCHI

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