JPS5561128A - Comb line elastic surface wave device - Google Patents

Comb line elastic surface wave device

Info

Publication number
JPS5561128A
JPS5561128A JP13370178A JP13370178A JPS5561128A JP S5561128 A JPS5561128 A JP S5561128A JP 13370178 A JP13370178 A JP 13370178A JP 13370178 A JP13370178 A JP 13370178A JP S5561128 A JPS5561128 A JP S5561128A
Authority
JP
Japan
Prior art keywords
surface wave
elastic surface
electrode
electrodes
wave device
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
JP13370178A
Other languages
Japanese (ja)
Inventor
Jun Yamada
Takeshi Hazama
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 JP13370178A priority Critical patent/JPS5561128A/en
Publication of JPS5561128A publication Critical patent/JPS5561128A/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
    • H03H9/14544—Transducers of particular shape or position
    • H03H9/1455—Transducers of particular shape or position constituted of N parallel or series 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
    • H03H9/14502—Surface acoustic wave [SAW] transducers for a particular purpose
    • H03H9/14514—Broad band 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
    • H03H9/14552—Transducers of particular shape or position comprising split fingers

Landscapes

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

Abstract

PURPOSE:To realize an elastic surface wave filter which can be used over a broad range by making at leasr either one of input and output electrodes into three-electrode structure. CONSTITUTION:A couple of electrode fingers 23 are formed between electrode fingers 21 projecting from bus bar 20 to the other bus bar 22 are formed at an even interval. Higher-harmonic generating strength can be veried by varying electrode width (a). At least either one of electrodes is operated with a fundamental frequency 1/2n as high as desired frequency (f0) to obtain an elastic surface wave filter which operates on a higher harmonic of its even order in a broad range. Further, at least either one of input and output electrodes is made into three-electrode constitution to widen its band. In addition, this device can also be miniaturized because only a couple of electrodes are required for each band.
JP13370178A 1978-11-01 1978-11-01 Comb line elastic surface wave device Pending JPS5561128A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13370178A JPS5561128A (en) 1978-11-01 1978-11-01 Comb line elastic surface wave device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13370178A JPS5561128A (en) 1978-11-01 1978-11-01 Comb line elastic surface wave device

Publications (1)

Publication Number Publication Date
JPS5561128A true JPS5561128A (en) 1980-05-08

Family

ID=15110858

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13370178A Pending JPS5561128A (en) 1978-11-01 1978-11-01 Comb line elastic surface wave device

Country Status (1)

Country Link
JP (1) JPS5561128A (en)

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