JPS57150214A - Surface wave device - Google Patents

Surface wave device

Info

Publication number
JPS57150214A
JPS57150214A JP3503281A JP3503281A JPS57150214A JP S57150214 A JPS57150214 A JP S57150214A JP 3503281 A JP3503281 A JP 3503281A JP 3503281 A JP3503281 A JP 3503281A JP S57150214 A JPS57150214 A JP S57150214A
Authority
JP
Japan
Prior art keywords
wave
speed
transversal
transducer
film
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
JP3503281A
Other languages
Japanese (ja)
Inventor
Tsutomu Nishikawa
Atsushi Tani
Shoichi Kishi
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 JP3503281A priority Critical patent/JPS57150214A/en
Publication of JPS57150214A publication Critical patent/JPS57150214A/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

Landscapes

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

Abstract

PURPOSE:To easily realize suppression of an undesired wave of an SH wave type surface wave (love wave, B-G wave) device, by attaching a metallic film having a speed of a transversal wave smaller than a speed of a transversal wave of a piezoelectric substrate between an acoustical absorbent and a transducer. CONSTITUTION:An electrode film 40 is attached between a transducer 20 and and an acoustical absorbent 30, which are provided on a piezoelectric substrate 10. Above all, in case of a love wave device, as for an electrode material for constituting the transducer 20, a material having a speed of a transversal wave smaller than a speed of a transversal wave of the substrate is necessary, but as a result of attaching the same electrode film 40 as this material, suppression of an undesired wave by the acoustical absorbent has proved to be effective. On the other hand, in case of a B-G wave, it is different from a wave, its electrode material is not limited essentially, and any semiconductive film can be used.
JP3503281A 1981-03-11 1981-03-11 Surface wave device Pending JPS57150214A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3503281A JPS57150214A (en) 1981-03-11 1981-03-11 Surface wave device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3503281A JPS57150214A (en) 1981-03-11 1981-03-11 Surface wave device

Publications (1)

Publication Number Publication Date
JPS57150214A true JPS57150214A (en) 1982-09-17

Family

ID=12430714

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3503281A Pending JPS57150214A (en) 1981-03-11 1981-03-11 Surface wave device

Country Status (1)

Country Link
JP (1) JPS57150214A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63260213A (en) * 1986-09-12 1988-10-27 Hiroshi Shimizu Resonator using high coupling love wave type saw substrate

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63260213A (en) * 1986-09-12 1988-10-27 Hiroshi Shimizu Resonator using high coupling love wave type saw substrate

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