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JPS5555613A - Surface acoustic wave device - Google Patents

Surface acoustic wave device

Info

Publication number
JPS5555613A
JPS5555613A JP12837978A JP12837978A JPS5555613A JP S5555613 A JPS5555613 A JP S5555613A JP 12837978 A JP12837978 A JP 12837978A JP 12837978 A JP12837978 A JP 12837978A JP S5555613 A JPS5555613 A JP S5555613A
Authority
JP
Japan
Prior art keywords
electrode
acoustic wave
surface acoustic
pairs
electric signal
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
JP12837978A
Other languages
Japanese (ja)
Inventor
Jun Yamada
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 JP12837978A priority Critical patent/JPS5555613A/en
Publication of JPS5555613A publication Critical patent/JPS5555613A/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
    • H03H9/46—Filters
    • H03H9/64—Filters using surface acoustic waves
    • H03H9/6489—Compensation of undesirable effects
    • H03H9/6493—Side lobe suppression
    • 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 sufficiently keep excellent ratio of peak and dip, by taking greater the number of pairs of the third electrode remote to the first electrode than that of the second electrode near to it. CONSTITUTION:On the surface of piezoelectric board 1, the first electrode 2 converting electric signal to surface acoustic wave, second and third electrdoes 3 and 4 converting the surface acoustic wave into electric signal again, are provided. The number of pairs of the third electrode remote to the first electrode is provided many in number than that of the electrode near. Thus, the decrease in the strength of surface acoustic wave due to reflection at the electrode 3, propagation loss, and diffraction loss is compensated with the increment of the number of pairs of the electrode 4 and the output of the same level is obtained, allowing to obtain excellent peak and dip characteristics.
JP12837978A 1978-10-20 1978-10-20 Surface acoustic wave device Pending JPS5555613A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12837978A JPS5555613A (en) 1978-10-20 1978-10-20 Surface acoustic wave device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12837978A JPS5555613A (en) 1978-10-20 1978-10-20 Surface acoustic wave device

Publications (1)

Publication Number Publication Date
JPS5555613A true JPS5555613A (en) 1980-04-23

Family

ID=14983356

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12837978A Pending JPS5555613A (en) 1978-10-20 1978-10-20 Surface acoustic wave device

Country Status (1)

Country Link
JP (1) JPS5555613A (en)

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