JPS54136154A - Elastic surface wave device - Google Patents

Elastic surface wave device

Info

Publication number
JPS54136154A
JPS54136154A JP4270178A JP4270178A JPS54136154A JP S54136154 A JPS54136154 A JP S54136154A JP 4270178 A JP4270178 A JP 4270178A JP 4270178 A JP4270178 A JP 4270178A JP S54136154 A JPS54136154 A JP S54136154A
Authority
JP
Japan
Prior art keywords
surface wave
elastic surface
electrode
filter
varying
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
JP4270178A
Other languages
Japanese (ja)
Inventor
Sadao Takahashi
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 JP4270178A priority Critical patent/JPS54136154A/en
Publication of JPS54136154A publication Critical patent/JPS54136154A/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
    • H03H9/6423—Means for obtaining a particular transfer characteristic

Landscapes

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

Abstract

PURPOSE:To secure a sufficient amount of attenuation at the attenuation band of the filter without varying the filter properties by changing the effective excitation opening of the output electrode and also providing the effective excitation opening length larger than that of the input electrode. CONSTITUTION:Output electrode 43 is provided on piezoelectric substrate 41 and at elastic surface wave propagation path 44 led from input electrode 42. Electrode 43 is formed by varying partially the length of the effective excitation opening. And sound absorbing component 45 and 46 are provided to the elastic surface wave propagation path outside electrode 42 and 43. Thus, an elastic surface wave device is obtained. As a result, the attenuation amount of the filter can be reduced sufficiently without varying the filter properties.
JP4270178A 1978-04-13 1978-04-13 Elastic surface wave device Pending JPS54136154A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4270178A JPS54136154A (en) 1978-04-13 1978-04-13 Elastic surface wave device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4270178A JPS54136154A (en) 1978-04-13 1978-04-13 Elastic surface wave device

Publications (1)

Publication Number Publication Date
JPS54136154A true JPS54136154A (en) 1979-10-23

Family

ID=12643348

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4270178A Pending JPS54136154A (en) 1978-04-13 1978-04-13 Elastic surface wave device

Country Status (1)

Country Link
JP (1) JPS54136154A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5843610A (en) * 1981-09-09 1983-03-14 Toshiba Corp Surface acoustic wave device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5843610A (en) * 1981-09-09 1983-03-14 Toshiba Corp Surface acoustic wave device

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