JPS56141612A - Elastic surface wave equipment - Google Patents

Elastic surface wave equipment

Info

Publication number
JPS56141612A
JPS56141612A JP4462980A JP4462980A JPS56141612A JP S56141612 A JPS56141612 A JP S56141612A JP 4462980 A JP4462980 A JP 4462980A JP 4462980 A JP4462980 A JP 4462980A JP S56141612 A JPS56141612 A JP S56141612A
Authority
JP
Japan
Prior art keywords
electrode
pitch
wide band
small
regular
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
JP4462980A
Other languages
Japanese (ja)
Inventor
Seiji Kishimoto
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP4462980A priority Critical patent/JPS56141612A/en
Publication of JPS56141612A publication Critical patent/JPS56141612A/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
    • H03H9/125—Driving means, e.g. electrodes, coils
    • H03H9/145—Driving means, e.g. electrodes, coils for networks using surface acoustic waves
    • H03H9/14502—Surface acoustic wave [SAW] transducers for a particular purpose
    • H03H9/14514—Broad band transducers

Abstract

PURPOSE:To realize a wide band by constituting the pitch of electrode fingers of input/outpt electrodes with combining a part which is varied continuously and a part having a constant pitch. CONSTITUTION:The input electrode 8 is constituted of a chirp electrode 8a whose electrode finger pitch is continuously varied from 3.3mum to 2.0mum, and a regular elecrode 8b whose electrode finger is of a constant pitch of 2.0mum, and it is made small-sized, its loss is made low and also its wide band is realized by use of the characteristics of the chirp electrode having a wide band characteristic by which the insertion loss is small even if the opening length is narrow, and the regular electrode having a characteristic by which the insertion loss is small in a narrow band. Furthermore, it can be worked easily by setting the minimum pitch to 2.0mum.
JP4462980A 1980-04-07 1980-04-07 Elastic surface wave equipment Pending JPS56141612A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4462980A JPS56141612A (en) 1980-04-07 1980-04-07 Elastic surface wave equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4462980A JPS56141612A (en) 1980-04-07 1980-04-07 Elastic surface wave equipment

Publications (1)

Publication Number Publication Date
JPS56141612A true JPS56141612A (en) 1981-11-05

Family

ID=12696707

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4462980A Pending JPS56141612A (en) 1980-04-07 1980-04-07 Elastic surface wave equipment

Country Status (1)

Country Link
JP (1) JPS56141612A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6646178B2 (en) 2000-09-01 2003-11-11 Uni-Charm Corporation Absorbent article with surface member of continuous filaments
US7400218B2 (en) 2003-11-12 2008-07-15 Murata Manufacturing Co., Ltd. Surface acoustic wave filter

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5128372A (en) * 1974-09-03 1976-03-10 Japan Storage Battery Co Ltd Hijoyokeikoto no kyudenhoshiki

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5128372A (en) * 1974-09-03 1976-03-10 Japan Storage Battery Co Ltd Hijoyokeikoto no kyudenhoshiki

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6646178B2 (en) 2000-09-01 2003-11-11 Uni-Charm Corporation Absorbent article with surface member of continuous filaments
US7400218B2 (en) 2003-11-12 2008-07-15 Murata Manufacturing Co., Ltd. Surface acoustic wave filter

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