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JPS56134819A - Surface wave filter - Google Patents

Surface wave filter

Info

Publication number
JPS56134819A
JPS56134819A JP3690680A JP3690680A JPS56134819A JP S56134819 A JPS56134819 A JP S56134819A JP 3690680 A JP3690680 A JP 3690680A JP 3690680 A JP3690680 A JP 3690680A JP S56134819 A JPS56134819 A JP S56134819A
Authority
JP
Japan
Prior art keywords
surface wave
wave filter
piezoelectric substrate
electrode
output 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
JP3690680A
Other languages
Japanese (ja)
Inventor
Nobuki Yamaji
Akira Onoe
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP3690680A priority Critical patent/JPS56134819A/en
Publication of JPS56134819A publication Critical patent/JPS56134819A/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
    • H03H9/02543—Characteristics of substrate, e.g. cutting angles
    • 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
    • H03H9/14573—Arrow type 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
    • H03H9/02535—Details of surface acoustic wave devices
    • H03H9/02637—Details concerning reflective or coupling 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
    • H03H9/14517—Means for weighting
    • H03H9/1452—Means for weighting by finger overlap length, apodisation

Landscapes

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

Abstract

PURPOSE:To improve the characteristic, by forming the piezoelectric substrate into a triangle in the surface wave filter obtained by causing the piezoelectric substrate, where the input electrode and the output electrode are formed on the surface, to adhere to the stem. CONSTITUTION:Triangular piezoelectric substrate 11 divided into two by a diagonal line is used to form a surface wave filter. Consequently, since weighting part 16 of input electrode 12 can be formed in the same manner as the conventional surface wave filter, the electric signal is converted to a surface wave mechanically and is propagated toward the output electrode according to the prescribed method. Since acoustic absorbing layer 14 of electrode 12 exists in the region where the surface wave is converged, this spread of the area is sufficient for it.
JP3690680A 1980-03-25 1980-03-25 Surface wave filter Pending JPS56134819A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3690680A JPS56134819A (en) 1980-03-25 1980-03-25 Surface wave filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3690680A JPS56134819A (en) 1980-03-25 1980-03-25 Surface wave filter

Publications (1)

Publication Number Publication Date
JPS56134819A true JPS56134819A (en) 1981-10-21

Family

ID=12482809

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3690680A Pending JPS56134819A (en) 1980-03-25 1980-03-25 Surface wave filter

Country Status (1)

Country Link
JP (1) JPS56134819A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985003816A1 (en) * 1984-02-21 1985-08-29 Gte Products Corporation Triangularly configured surface acoustic wave filter
JPS6265509A (en) * 1985-09-17 1987-03-24 Matsushita Electric Ind Co Ltd Surface wave device
EP0224866A2 (en) * 1985-12-05 1987-06-10 Siemens Aktiengesellschaft Surface acoustic wave circuit element
JPS62135005A (en) * 1985-12-05 1987-06-18 シ−メンス、アクチエンゲゼルシヤフト Surface wave device and manufacture of the same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985003816A1 (en) * 1984-02-21 1985-08-29 Gte Products Corporation Triangularly configured surface acoustic wave filter
JPS6265509A (en) * 1985-09-17 1987-03-24 Matsushita Electric Ind Co Ltd Surface wave device
EP0224866A2 (en) * 1985-12-05 1987-06-10 Siemens Aktiengesellschaft Surface acoustic wave circuit element
JPS62135005A (en) * 1985-12-05 1987-06-18 シ−メンス、アクチエンゲゼルシヤフト Surface wave device and manufacture of the same

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