JPS555510A - Surface acoustic wave unit - Google Patents

Surface acoustic wave unit

Info

Publication number
JPS555510A
JPS555510A JP7746078A JP7746078A JPS555510A JP S555510 A JPS555510 A JP S555510A JP 7746078 A JP7746078 A JP 7746078A JP 7746078 A JP7746078 A JP 7746078A JP S555510 A JPS555510 A JP S555510A
Authority
JP
Japan
Prior art keywords
electrode
buses
surface acoustic
crossing
opposing
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
JP7746078A
Other languages
Japanese (ja)
Inventor
Nobuaki Ooya
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 JP7746078A priority Critical patent/JPS555510A/en
Publication of JPS555510A publication Critical patent/JPS555510A/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
    • H03H9/02992—Details of bus bars, contact pads or other electrical connections for finger electrodes
    • 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
    • H03H9/02535—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
    • H03H9/125—Driving means, e.g. electrodes, coils
    • H03H9/145—Driving means, e.g. electrodes, coils for networks using surface acoustic waves
    • H03H9/14517—Means for weighting
    • H03H9/1452—Means for weighting by finger overlap length, apodisation

Landscapes

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

Abstract

PURPOSE:To enable to determine the filter performance easily from the frequency reqponse of electrodes, by providing the electrode bus separated from the opposing electrode finger and providing the dummy load at the external region of the bus. CONSTITUTION:The input electrode 2 and the output electrode 3 of interdigital electrode are placed on the piezoelectric substrate 1. This electrode 2 is weighted by changing the width of crossing to change the crossing width D of the opposing electrode finger 4. The electrode buses 5 and 6 are provided along the envelope of the crossing width D. The buses 5 and 6 are provided in insulation from the opposing electrode finger 4, and the dummy loads 10 and 11 are given at the external region of the buses 5 and 6. Thus, surface acoustic waves are propagated to the electrode 3 from the electrode 2, allowing the frequency response of the electrode 2 to easily determine the filter performance.
JP7746078A 1978-06-28 1978-06-28 Surface acoustic wave unit Pending JPS555510A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7746078A JPS555510A (en) 1978-06-28 1978-06-28 Surface acoustic wave unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7746078A JPS555510A (en) 1978-06-28 1978-06-28 Surface acoustic wave unit

Publications (1)

Publication Number Publication Date
JPS555510A true JPS555510A (en) 1980-01-16

Family

ID=13634613

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7746078A Pending JPS555510A (en) 1978-06-28 1978-06-28 Surface acoustic wave unit

Country Status (1)

Country Link
JP (1) JPS555510A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6327113A (en) * 1986-07-18 1988-02-04 Sanyo Electric Co Ltd Surface wave filter

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5138852A (en) * 1974-08-02 1976-03-31 Philips Nv

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5138852A (en) * 1974-08-02 1976-03-31 Philips Nv

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6327113A (en) * 1986-07-18 1988-02-04 Sanyo Electric Co Ltd Surface wave filter

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