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JPS57119507A - Surface acoustic wave device - Google Patents

Surface acoustic wave device

Info

Publication number
JPS57119507A
JPS57119507A JP516481A JP516481A JPS57119507A JP S57119507 A JPS57119507 A JP S57119507A JP 516481 A JP516481 A JP 516481A JP 516481 A JP516481 A JP 516481A JP S57119507 A JPS57119507 A JP S57119507A
Authority
JP
Japan
Prior art keywords
filter
thickness
plate
linbo3
inequality
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
JP516481A
Other languages
Japanese (ja)
Inventor
Hitoshi Suzuki
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 JP516481A priority Critical patent/JPS57119507A/en
Publication of JPS57119507A publication Critical patent/JPS57119507A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H3/00—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators
    • H03H3/007—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks
    • H03H3/08—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks for the manufacture of resonators or networks using surface acoustic waves

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)

Abstract

PURPOSE:To eliminate a spurious phenomenon by specifying the thickness of a rotary Y-cut LiNbO3 plate with a 125-135 deg. angle of rotation around an X axis in accordance with an inequality. CONSTITUTION:A 128 deg. rotary Y-cut LiNbO3 plate which is a piezoelectric substrate provides longitudinal spurious oscillation. To prevent said oscillation from in fluencing surface wave filter characteristics, the thickness of the substrate is so specified that resonance is not within the passing band of a filter. This applies to a VSB filter for domestic TV broadcasting equipment. The passing band width of this filter is 17-22MHz (FU), so, for example, a broken-line slanting-line area P is applied except an intersection range W determined by straight lines fL and fU and the straight line of resonance frequency characteristics (frn), thereby removing a spurious phenomenon. In other words, the thickness of the LiNbO3 plate is specified as shown by the inequality in the figure. In the inequality, (n) is an odd number, fL and fU are the minimum and maximum frequencies (MHz) of the filter passing band, and (d) is the thickness of the LiNbO3 plate.
JP516481A 1981-01-19 1981-01-19 Surface acoustic wave device Pending JPS57119507A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP516481A JPS57119507A (en) 1981-01-19 1981-01-19 Surface acoustic wave device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP516481A JPS57119507A (en) 1981-01-19 1981-01-19 Surface acoustic wave device

Publications (1)

Publication Number Publication Date
JPS57119507A true JPS57119507A (en) 1982-07-26

Family

ID=11603592

Family Applications (1)

Application Number Title Priority Date Filing Date
JP516481A Pending JPS57119507A (en) 1981-01-19 1981-01-19 Surface acoustic wave device

Country Status (1)

Country Link
JP (1) JPS57119507A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5362964A (en) * 1976-11-09 1978-06-05 Toshiba Corp Elastic surface wave apparatus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5362964A (en) * 1976-11-09 1978-06-05 Toshiba Corp Elastic surface wave apparatus

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