JPS5647118A - Surface elastic wave filter of band-passing type - Google Patents

Surface elastic wave filter of band-passing type

Info

Publication number
JPS5647118A
JPS5647118A JP12334479A JP12334479A JPS5647118A JP S5647118 A JPS5647118 A JP S5647118A JP 12334479 A JP12334479 A JP 12334479A JP 12334479 A JP12334479 A JP 12334479A JP S5647118 A JPS5647118 A JP S5647118A
Authority
JP
Japan
Prior art keywords
transducer
band
surface wave
wave filter
passing type
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
JP12334479A
Other languages
Japanese (ja)
Inventor
Michio Kadota
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.)
Murata Manufacturing Co Ltd
Original Assignee
Murata Manufacturing 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 Murata Manufacturing Co Ltd filed Critical Murata Manufacturing Co Ltd
Priority to JP12334479A priority Critical patent/JPS5647118A/en
Publication of JPS5647118A publication Critical patent/JPS5647118A/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
    • H03H9/02834—Means for compensation or elimination of undesirable effects of temperature influence
    • 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
    • H03H9/6423—Means for obtaining a particular transfer characteristic
    • H03H9/6426—Combinations of the characteristics of different transducers

Landscapes

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

Abstract

PURPOSE:To obtain band-passing type surface wave filter with excellent temperature characteristics, by providing a prescribed attenuation pole with broad-band characteristics by slightly shifting the attenuation poles of input and output surface wave transducers that should coincident in terms of frequency. CONSTITUTION:On piezoelectric substrate 1, input-side surface wave transducer 2 and output-side surface wave transducer 3 are formed. Transducer 2 is composed of a weighted interdigital electrode, and transducer 3 of a normal interdigital electrode. Then, weighted transducer 2 should provide frequency-attenuation characteristics shown by (a), and normal transducer 3 that shown by (b).
JP12334479A 1979-09-25 1979-09-25 Surface elastic wave filter of band-passing type Pending JPS5647118A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12334479A JPS5647118A (en) 1979-09-25 1979-09-25 Surface elastic wave filter of band-passing type

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12334479A JPS5647118A (en) 1979-09-25 1979-09-25 Surface elastic wave filter of band-passing type

Publications (1)

Publication Number Publication Date
JPS5647118A true JPS5647118A (en) 1981-04-28

Family

ID=14858233

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12334479A Pending JPS5647118A (en) 1979-09-25 1979-09-25 Surface elastic wave filter of band-passing type

Country Status (1)

Country Link
JP (1) JPS5647118A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58207295A (en) * 1982-10-21 1983-12-02 日立建機株式会社 Connecting structure of mast in climbing crane
JPH05218786A (en) * 1992-01-31 1993-08-27 Sanyo Electric Co Ltd Surface acoustic wave device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51124352A (en) * 1975-04-22 1976-10-29 Murata Mfg Co Ltd Elastic surface wave filter

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51124352A (en) * 1975-04-22 1976-10-29 Murata Mfg Co Ltd Elastic surface wave filter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58207295A (en) * 1982-10-21 1983-12-02 日立建機株式会社 Connecting structure of mast in climbing crane
JPH05218786A (en) * 1992-01-31 1993-08-27 Sanyo Electric Co Ltd Surface acoustic wave device

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