JPS5757019A - Surface acoustic wave filter - Google Patents

Surface acoustic wave filter

Info

Publication number
JPS5757019A
JPS5757019A JP13257980A JP13257980A JPS5757019A JP S5757019 A JPS5757019 A JP S5757019A JP 13257980 A JP13257980 A JP 13257980A JP 13257980 A JP13257980 A JP 13257980A JP S5757019 A JPS5757019 A JP S5757019A
Authority
JP
Japan
Prior art keywords
terminals
earth
pair
input
output
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
JP13257980A
Other languages
Japanese (ja)
Inventor
Junji Inui
Hideki Tominaga
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP13257980A priority Critical patent/JPS5757019A/en
Publication of JPS5757019A publication Critical patent/JPS5757019A/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
    • H03H9/05—Holders; Supports
    • H03H9/058—Holders; Supports for surface acoustic wave devices
    • 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
    • H03H9/02874—Means for compensation or elimination of undesirable effects of direct coupling between input and output 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
    • H03H9/02818—Means for compensation or elimination of undesirable effects
    • H03H9/02913—Measures for shielding against electromagnetic fields

Landscapes

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

Abstract

PURPOSE:To expand limits of requirement for the filter trap, by leading out earth terminals, which are protruded and formed from a pair of earth plates, to the outside of input terminals and output terminals oppositely to each other. CONSTITUTION:Earth terminals 16' and 17' connected to a pair of earth plates 16 and 17 caused to adhere to the reverse of a filter element 1, a pair of input terminals 3 and 4, a pair of output terminals 5 and 6 are led out in the same direction. In this case, terminals 16' and 17' are led out to the outside of terminals 3 and 4 and terminals 5 and 6 respectively oppositely to each other. Thus, electromagnetic wave induction which couples between an input transducer 9 and an output transducer 10 without passing through the element 1 does not pass through the earth plate directly, and the inductive level is lowered considerably.
JP13257980A 1980-09-24 1980-09-24 Surface acoustic wave filter Pending JPS5757019A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13257980A JPS5757019A (en) 1980-09-24 1980-09-24 Surface acoustic wave filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13257980A JPS5757019A (en) 1980-09-24 1980-09-24 Surface acoustic wave filter

Publications (1)

Publication Number Publication Date
JPS5757019A true JPS5757019A (en) 1982-04-06

Family

ID=15084619

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13257980A Pending JPS5757019A (en) 1980-09-24 1980-09-24 Surface acoustic wave filter

Country Status (1)

Country Link
JP (1) JPS5757019A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6038323A (en) * 1983-08-10 1985-02-27 Sankyo Co Ltd Ophthalmic anti-inflammatory agent
JPH0480125U (en) * 1990-11-27 1992-07-13

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6038323A (en) * 1983-08-10 1985-02-27 Sankyo Co Ltd Ophthalmic anti-inflammatory agent
JPH0480125U (en) * 1990-11-27 1992-07-13

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