JPS5757018A - Surface acoustic wave filter - Google Patents

Surface acoustic wave filter

Info

Publication number
JPS5757018A
JPS5757018A JP13257880A JP13257880A JPS5757018A JP S5757018 A JPS5757018 A JP S5757018A JP 13257880 A JP13257880 A JP 13257880A JP 13257880 A JP13257880 A JP 13257880A JP S5757018 A JPS5757018 A JP S5757018A
Authority
JP
Japan
Prior art keywords
terminal
input
acoustic wave
surface acoustic
wave filter
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
JP13257880A
Other languages
Japanese (ja)
Inventor
Junji Inui
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 JP13257880A priority Critical patent/JPS5757018A/en
Publication of JPS5757018A publication Critical patent/JPS5757018A/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
    • H03H9/02874—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
    • H03H9/05—Holders; Supports
    • H03H9/058—Holders; Supports for surface acoustic wave devices

Abstract

PURPOSE:To reduce the inductive level of direct coupling, by leading out an earth terminal from the outside of a terminal in a higher impedance between input and output impedances. CONSTITUTION:One earth terminal 14' connected to an earth plate 14 which is caused to adhere to the reverse of a filter element 1, a pair of input terminals 3 and 4, and a pair of output terminals 5 and 6 are led out in the same drection. In this case, the terminal 14' is led out from the outside of terminals 5 and 6 in a higher impedance between input and output impedances of the element 1. Thus, the inductive level becomes about-57dB.
JP13257880A 1980-09-24 1980-09-24 Surface acoustic wave filter Pending JPS5757018A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13257880A JPS5757018A (en) 1980-09-24 1980-09-24 Surface acoustic wave filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13257880A JPS5757018A (en) 1980-09-24 1980-09-24 Surface acoustic wave filter

Publications (1)

Publication Number Publication Date
JPS5757018A true JPS5757018A (en) 1982-04-06

Family

ID=15084593

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13257880A Pending JPS5757018A (en) 1980-09-24 1980-09-24 Surface acoustic wave filter

Country Status (1)

Country Link
JP (1) JPS5757018A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4795934A (en) * 1984-02-20 1989-01-03 British Telecommunication, Plc Mounting of saw devices
JPH0480125U (en) * 1990-11-27 1992-07-13

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4795934A (en) * 1984-02-20 1989-01-03 British Telecommunication, Plc Mounting of saw devices
US5035035A (en) * 1984-02-20 1991-07-30 British Telecommunications Plc Method of mounting saw devices
JPH0480125U (en) * 1990-11-27 1992-07-13

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