JPS5656029A - Elastic surface wave filter - Google Patents

Elastic surface wave filter

Info

Publication number
JPS5656029A
JPS5656029A JP13155879A JP13155879A JPS5656029A JP S5656029 A JPS5656029 A JP S5656029A JP 13155879 A JP13155879 A JP 13155879A JP 13155879 A JP13155879 A JP 13155879A JP S5656029 A JPS5656029 A JP S5656029A
Authority
JP
Japan
Prior art keywords
electrode fingers
response
cross width
correspond
comparison
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
JP13155879A
Other languages
Japanese (ja)
Other versions
JPS6210046B2 (en
Inventor
Michio Kadota
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.)
Murata Manufacturing Co Ltd
Original Assignee
Murata Manufacturing 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 Murata Manufacturing Co Ltd filed Critical Murata Manufacturing Co Ltd
Priority to JP13155879A priority Critical patent/JPS5656029A/en
Publication of JPS5656029A publication Critical patent/JPS5656029A/en
Publication of JPS6210046B2 publication Critical patent/JPS6210046B2/ja
Granted 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators
    • H03H9/02—Details
    • H03H9/02535—Details of surface acoustic wave devices
    • H03H9/02818—Means for compensation or elimination of undesirable effects
    • H03H9/02881—Means for compensation or elimination of undesirable effects of diffraction of wave beam
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic elements; 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)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)

Abstract

PURPOSE:To reduce a diffraction loss and influence of manufacture variance by eliminating the cross width of electrode fingers that correspond to response of less than 6% in comparison with the maximum response of impulse response and by decentralizing the position in the length direction of electrode fingers. CONSTITUTION:Electrode fingers of not less than 6% in comparison with the maximum response of impulse response are shown by being encircles by dotted lines in the figure and between electrode fingers 10 and 11, 11 and 12, 12 and 13, 13 and 14, 14 and 15, and 15 and 16 that correspond to response of 6% in magnitude, opposite electrode fingers are provided at intervals without crossing mutually. Parts of zero-cross width between respective adjacent electrode fingers are shifted in position in the length direction of electrode fingers and decentralized along the line slanting at a certain angle to the propagation direction. Therefore, a decrease in excitation of small cross width is eliminated, and consequently a large diffraction loss caused by it disappears while an influence of manufacture variance can be suppressed when electrode fingers of small cross width are formed, so that desired frequency characteristics at the design can be made close to actually obtained frequency characteristics.
JP13155879A 1979-10-11 1979-10-11 Elastic surface wave filter Granted JPS5656029A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13155879A JPS5656029A (en) 1979-10-11 1979-10-11 Elastic surface wave filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13155879A JPS5656029A (en) 1979-10-11 1979-10-11 Elastic surface wave filter

Publications (2)

Publication Number Publication Date
JPS5656029A true JPS5656029A (en) 1981-05-16
JPS6210046B2 JPS6210046B2 (en) 1987-03-04

Family

ID=15060867

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13155879A Granted JPS5656029A (en) 1979-10-11 1979-10-11 Elastic surface wave filter

Country Status (1)

Country Link
JP (1) JPS5656029A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05269402A (en) * 1992-03-25 1993-10-19 Taiyo Yuden Co Ltd Apparatus for fractionating magnetic component

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5528678A (en) * 1978-08-22 1980-02-29 Nec Corp Reed screen shape electrode

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5528678A (en) * 1978-08-22 1980-02-29 Nec Corp Reed screen shape electrode

Also Published As

Publication number Publication date
JPS6210046B2 (en) 1987-03-04

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