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JPS5769919A - Surface acoustic wave device - Google Patents

Surface acoustic wave device

Info

Publication number
JPS5769919A
JPS5769919A JP14578580A JP14578580A JPS5769919A JP S5769919 A JPS5769919 A JP S5769919A JP 14578580 A JP14578580 A JP 14578580A JP 14578580 A JP14578580 A JP 14578580A JP S5769919 A JPS5769919 A JP S5769919A
Authority
JP
Japan
Prior art keywords
acoustic wave
surface acoustic
reflection
wave device
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
JP14578580A
Other languages
Japanese (ja)
Inventor
Seiji Kishimoto
Takeshi Hazama
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 JP14578580A priority Critical patent/JPS5769919A/en
Publication of JPS5769919A publication Critical patent/JPS5769919A/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 elements; 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 attenuate unnecessary reflection waves, by splitting electrodes having reflecting effect provided between input and output electrodes in parallel with propagation direction of surface waves and locating them with a shift. CONSTITUTION:A periodical construction 3 provided between an input electrode 2 and an output electrode 4 is split into two at the middle, and they are located toward propagation direction with a shift of 1/4 wavelength. Since the reflecting wave from the construction 3 to the input electrode 2 is shifted for the phase by pi at the split part, a part of reflection surface acoustic wave energy of the both is cancelled partly at the output electrode 4. As a result, multiplex reflection can be attenuated effectively and the characteristics of surface acoustic wave device having a narrow block band in the band can be improved.
JP14578580A 1980-10-20 1980-10-20 Surface acoustic wave device Pending JPS5769919A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14578580A JPS5769919A (en) 1980-10-20 1980-10-20 Surface acoustic wave device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14578580A JPS5769919A (en) 1980-10-20 1980-10-20 Surface acoustic wave device

Publications (1)

Publication Number Publication Date
JPS5769919A true JPS5769919A (en) 1982-04-30

Family

ID=15393097

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14578580A Pending JPS5769919A (en) 1980-10-20 1980-10-20 Surface acoustic wave device

Country Status (1)

Country Link
JP (1) JPS5769919A (en)

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