JPS5533341A - Elastic surface wave device - Google Patents

Elastic surface wave device

Info

Publication number
JPS5533341A
JPS5533341A JP10556778A JP10556778A JPS5533341A JP S5533341 A JPS5533341 A JP S5533341A JP 10556778 A JP10556778 A JP 10556778A JP 10556778 A JP10556778 A JP 10556778A JP S5533341 A JPS5533341 A JP S5533341A
Authority
JP
Japan
Prior art keywords
surface wave
elastic surface
shape
secured
wave device
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.)
Granted
Application number
JP10556778A
Other languages
Japanese (ja)
Other versions
JPS6221286B2 (en
Inventor
Akira Yamada
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 JP10556778A priority Critical patent/JPS5533341A/en
Publication of JPS5533341A publication Critical patent/JPS5533341A/en
Publication of JPS6221286B2 publication Critical patent/JPS6221286B2/ja
Granted 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 elements; Electromechanical resonators
    • H03H9/46—Filters
    • H03H9/64—Filters using surface acoustic waves
    • H03H9/6489—Compensation of undesirable effects
    • H03H9/6496—Reducing ripple in transfer characteristic
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators
    • H03H9/02—Details
    • H03H9/02535—Details of surface acoustic wave devices
    • H03H9/02543—Characteristics of substrate, e.g. cutting angles

Landscapes

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

Abstract

PURPOSE:To obtain an elastic surface wave device which decreases the ripple within the frequency effective band and increasing the attenuation at the end of the frequency band by providing the area changed into the linear form at part of the side of the piezoelectric substrate which is parallel to the propagation direction of the elastic surface wave. CONSTITUTION:Input and output electrodes 22 and 23 for propagation of the elastic surface wave are provided to piezoelectric substrate 21 made of the ceramics, crystal and the like. Absorber 24 is provided outside electrodes 22 and 23 to absorb the surface wave, and the incident surface of the elastic surface wave features the saw- tooth shape at the output side. At the input side, absorber 24 is provided for the partial absorption of the surface wave at dummy part 25 of the electrode. Thus the elastic surface wave device is obtained. Substrate 21 is shaped so that the area whose shape varies linearly may be secured at part of sides 27 and 28 parallel to the propagation direction of the surface wave, for example, shape 29 projected outside is secured for side 27. While linearly cut-off shape 30 is secured at side 28. Otherwise shape 40 formed by cutting off the both sides linearly. In such way, the ripple can be reduced within the effective band, also increasing the attenuation sufficiently at the end of the frequency band.
JP10556778A 1978-08-31 1978-08-31 Elastic surface wave device Granted JPS5533341A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10556778A JPS5533341A (en) 1978-08-31 1978-08-31 Elastic surface wave device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10556778A JPS5533341A (en) 1978-08-31 1978-08-31 Elastic surface wave device

Publications (2)

Publication Number Publication Date
JPS5533341A true JPS5533341A (en) 1980-03-08
JPS6221286B2 JPS6221286B2 (en) 1987-05-12

Family

ID=14411099

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10556778A Granted JPS5533341A (en) 1978-08-31 1978-08-31 Elastic surface wave device

Country Status (1)

Country Link
JP (1) JPS5533341A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5840928U (en) * 1981-09-10 1983-03-17 株式会社東芝 surface acoustic wave filter
JPS5957513A (en) * 1982-09-27 1984-04-03 Toshiba Corp Surface acoustic wave element
JPS5957514A (en) * 1982-09-27 1984-04-03 Toshiba Corp Surface acoustic wave element

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50105338U (en) * 1974-02-05 1975-08-29

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50105338U (en) * 1974-02-05 1975-08-29

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5840928U (en) * 1981-09-10 1983-03-17 株式会社東芝 surface acoustic wave filter
JPS5957513A (en) * 1982-09-27 1984-04-03 Toshiba Corp Surface acoustic wave element
JPS5957514A (en) * 1982-09-27 1984-04-03 Toshiba Corp Surface acoustic wave element

Also Published As

Publication number Publication date
JPS6221286B2 (en) 1987-05-12

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