JPS5758408A - Surface elastic wave filter - Google Patents

Surface elastic wave filter

Info

Publication number
JPS5758408A
JPS5758408A JP13301380A JP13301380A JPS5758408A JP S5758408 A JPS5758408 A JP S5758408A JP 13301380 A JP13301380 A JP 13301380A JP 13301380 A JP13301380 A JP 13301380A JP S5758408 A JPS5758408 A JP S5758408A
Authority
JP
Japan
Prior art keywords
msc
electrodes
wave filter
parallel
elastic wave
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
JP13301380A
Other languages
Japanese (ja)
Inventor
Yuji Kojima
Masaaki Ono
Noboru Wakatsuki
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 JP13301380A priority Critical patent/JPS5758408A/en
Publication of JPS5758408A publication Critical patent/JPS5758408A/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
    • H03H9/02637—Details concerning reflective or coupling arrays
    • 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
    • H03H9/02637—Details concerning reflective or coupling arrays
    • H03H9/02685—Grating lines having particular arrangements
    • H03H9/02708—Shifted grating lines
    • 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
    • H03H9/14544—Transducers of particular shape or position
    • H03H9/14573—Arrow type 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
    • H03H9/125—Driving means, e.g. electrodes, coils
    • H03H9/145—Driving means, e.g. electrodes, coils for networks using surface acoustic waves
    • H03H9/14544—Transducers of particular shape or position
    • H03H9/14547—Fan shaped; Tilted; Shifted; Slanted; Tapered; Arched; Stepped finger transducers

Landscapes

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

Abstract

PURPOSE:To make small in size of a piezoelectric substance and to make low the cost of a surface acoustic wave filter, by folding a multistrip coupler MSC. CONSTITUTION:An input transducer 10, multistrip coupler (MSC)12 and output transducer 11 are located on a piezoelectric substrate 9. The MSC12 is composed of a plurality of strips of parallel electrodes, and it is folded at the center lengthwise the electrodes and the upper and lower part is made vertical toward the lengthwise direction of the electrodes and the input transducer 10 and the output transducer 11 are moved in parallel so that they are closed with each other. Thus, the length of the piezoelectric substrate 9 can be reduced by the length of parallel movement of the MSC.
JP13301380A 1980-09-26 1980-09-26 Surface elastic wave filter Pending JPS5758408A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13301380A JPS5758408A (en) 1980-09-26 1980-09-26 Surface elastic wave filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13301380A JPS5758408A (en) 1980-09-26 1980-09-26 Surface elastic wave filter

Publications (1)

Publication Number Publication Date
JPS5758408A true JPS5758408A (en) 1982-04-08

Family

ID=15094747

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13301380A Pending JPS5758408A (en) 1980-09-26 1980-09-26 Surface elastic wave filter

Country Status (1)

Country Link
JP (1) JPS5758408A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5365206A (en) * 1989-11-14 1994-11-15 Siemens Aktiengesellschaft Surface acoustic wave reflector filter having z-shaped propagation paths

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5365206A (en) * 1989-11-14 1994-11-15 Siemens Aktiengesellschaft Surface acoustic wave reflector filter having z-shaped propagation paths

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