JPS54148495A - Comb-line type elastic surface wave device - Google Patents

Comb-line type elastic surface wave device

Info

Publication number
JPS54148495A
JPS54148495A JP5669578A JP5669578A JPS54148495A JP S54148495 A JPS54148495 A JP S54148495A JP 5669578 A JP5669578 A JP 5669578A JP 5669578 A JP5669578 A JP 5669578A JP S54148495 A JPS54148495 A JP S54148495A
Authority
JP
Japan
Prior art keywords
resonator
surface wave
electrode
secure
comb
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
JP5669578A
Other languages
Japanese (ja)
Inventor
Jun Yamada
Akitsuna Yuhara
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 JP5669578A priority Critical patent/JPS54148495A/en
Publication of JPS54148495A publication Critical patent/JPS54148495A/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
    • H03H9/6406—Filters characterised by a particular frequency characteristic
    • H03H9/6413—SAW comb filters
    • 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
    • H03H9/02685—Grating lines having particular arrangements

Landscapes

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

Abstract

PURPOSE:To reduce greatly the cost for the device as a whole by using the piezoelectric resonator for the resonator instead of the normal elastic surface wave resonator and thus omitting the distribution area for the surface wave resonator. CONSTITUTION:The lithium tantalate is used for piezoelectric substrate 3 for the Y axis cutting and the Z axis propagation, and the aluminum evaporation film of about 4000Angstrom is used for input/output electrode 2, 4 and 5 plus the electrode for piezoelectric resonator 9 each. These electrode 2, 4 and 5 are formed into 10 pairs of standard-type electrodes. And the electrode width is set to 5.6mum to secure the central frequency of 156M Hz, and the space between two electrodes is set to 1.7mm to secure the space 2M Hz for the comb-lined frequency each. Resonator 9 is formed into a circular form featuring the diameter of 75mum and designed to secure the high frequency of 150M Hz which is three times are high as the thickness shear oscillation. In this way, such characteristics as shown in the diagram is obtained, and the area of the substrate can be reduced down to about 1/2 since the distribution area for the surface wave resonator can be omitted. Thus, the production cost can be reduced greatly.
JP5669578A 1978-05-15 1978-05-15 Comb-line type elastic surface wave device Pending JPS54148495A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5669578A JPS54148495A (en) 1978-05-15 1978-05-15 Comb-line type elastic surface wave device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5669578A JPS54148495A (en) 1978-05-15 1978-05-15 Comb-line type elastic surface wave device

Publications (1)

Publication Number Publication Date
JPS54148495A true JPS54148495A (en) 1979-11-20

Family

ID=13034582

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5669578A Pending JPS54148495A (en) 1978-05-15 1978-05-15 Comb-line type elastic surface wave device

Country Status (1)

Country Link
JP (1) JPS54148495A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02213209A (en) * 1989-02-13 1990-08-24 Nec Corp Vibration element

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS498151A (en) * 1972-05-10 1974-01-24
JPS498150A (en) * 1972-05-10 1974-01-24
JPS5227240A (en) * 1975-08-25 1977-03-01 Toshiba Corp Surface wave filter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS498151A (en) * 1972-05-10 1974-01-24
JPS498150A (en) * 1972-05-10 1974-01-24
JPS5227240A (en) * 1975-08-25 1977-03-01 Toshiba Corp Surface wave filter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02213209A (en) * 1989-02-13 1990-08-24 Nec Corp Vibration element

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