JPS55114020A - Elastic surface wave filter - Google Patents

Elastic surface wave filter

Info

Publication number
JPS55114020A
JPS55114020A JP2157979A JP2157979A JPS55114020A JP S55114020 A JPS55114020 A JP S55114020A JP 2157979 A JP2157979 A JP 2157979A JP 2157979 A JP2157979 A JP 2157979A JP S55114020 A JPS55114020 A JP S55114020A
Authority
JP
Japan
Prior art keywords
surface wave
elastic surface
intervals
sides
input transducer
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.)
Granted
Application number
JP2157979A
Other languages
Japanese (ja)
Other versions
JPS6141448B2 (en
Inventor
Katsuhide Tsukamoto
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP2157979A priority Critical patent/JPS55114020A/en
Publication of JPS55114020A publication Critical patent/JPS55114020A/en
Publication of JPS6141448B2 publication Critical patent/JPS6141448B2/ja
Granted 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
    • H03H9/46—Filters
    • H03H9/64—Filters using surface acoustic waves
    • H03H9/6489—Compensation of undesirable effects
    • H03H9/6496—Reducing ripple in transfer characteristic
    • 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
    • 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
    • H03H9/14594—Plan-rotated or plan-tilted transducers

Landscapes

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

Abstract

PURPOSE:To lessen a ripple of frequency characteristics within a band without increasing an insertion loss by providing output transducers on both sides of an input transducer while their intervals vary linearly according to advance perpendicular to the propagation direction of an elastic surface wave. CONSTITUTION:On piezoelectric substrate 1, input transducer 2 and output transducers 3 and 4 positioned on both the sides are arranged. Intervals l1 and l2 at one terminal part perpendicular to the propagation direction of an elastic surface wave are made different from intervals l3 and l4 at the other and the transducers are tilted so that intervals will vary linearly between the both. Further, an electric signal applied from signal source 6 to center input transducer 2 is converted into an elastic surface wave, which is reconverted into electric signals by output transducers 3 and 4 on both the sides, and they are extracted in parallel to obtain output signals at load 5.
JP2157979A 1979-02-26 1979-02-26 Elastic surface wave filter Granted JPS55114020A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2157979A JPS55114020A (en) 1979-02-26 1979-02-26 Elastic surface wave filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2157979A JPS55114020A (en) 1979-02-26 1979-02-26 Elastic surface wave filter

Publications (2)

Publication Number Publication Date
JPS55114020A true JPS55114020A (en) 1980-09-03
JPS6141448B2 JPS6141448B2 (en) 1986-09-16

Family

ID=12058940

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2157979A Granted JPS55114020A (en) 1979-02-26 1979-02-26 Elastic surface wave filter

Country Status (1)

Country Link
JP (1) JPS55114020A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59117706A (en) * 1982-12-25 1984-07-07 Tokyo Electric Co Ltd Magnetic recording device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59117706A (en) * 1982-12-25 1984-07-07 Tokyo Electric Co Ltd Magnetic recording device

Also Published As

Publication number Publication date
JPS6141448B2 (en) 1986-09-16

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