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JPS57129514A - Coupler of surface acoustic wave - Google Patents

Coupler of surface acoustic wave

Info

Publication number
JPS57129514A
JPS57129514A JP1437181A JP1437181A JPS57129514A JP S57129514 A JPS57129514 A JP S57129514A JP 1437181 A JP1437181 A JP 1437181A JP 1437181 A JP1437181 A JP 1437181A JP S57129514 A JPS57129514 A JP S57129514A
Authority
JP
Japan
Prior art keywords
electrode
wave
surface acoustic
acoustic wave
waves
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
JP1437181A
Other languages
Japanese (ja)
Inventor
Yasutaka Shimizu
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP1437181A priority Critical patent/JPS57129514A/en
Publication of JPS57129514A publication Critical patent/JPS57129514A/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
    • H03H9/74—Multiple-port networks for connecting several sources or loads, working on the same frequency or frequency band, to a common load or source
    • H03H9/76—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 devices; Electromechanical resonators
    • H03H9/02—Details
    • H03H9/02535—Details of surface acoustic wave devices
    • H03H9/02818—Means for compensation or elimination of undesirable effects
    • H03H9/02905—Measures for separating propagation paths on substrate

Landscapes

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

Abstract

PURPOSE:To reduce the area of electrode and at the same time to improve the separation between tracks, by connecting the fingers to each other for two reed screen type electrodes respectively. CONSTITUTION:When a wave transmitting/receiving electrode T1 is energized, the following waves are generated. That is, a surface acoustic wave P21 going toward a reed screen type electrode T2, a surface acoustic wave P31 going toward a reed screen type electrode T4, and a reflected wave P11 going back to the electrode T1 respectively. When the number N of pairs of electrode fingers of a coupler 10 of surface acoustic wave increases, the wave P21 decreases with increase of the wave P11 respectively. The waves P11, P21, P31 and P41 are equal to each other with N=36, and at the same time the waves P31 and P41 become maximum. A center part 15 between electrodes 11 and 12 is common to both electrodes, and the part 15 can also be separated to be connected electrically.
JP1437181A 1981-02-04 1981-02-04 Coupler of surface acoustic wave Pending JPS57129514A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1437181A JPS57129514A (en) 1981-02-04 1981-02-04 Coupler of surface acoustic wave

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1437181A JPS57129514A (en) 1981-02-04 1981-02-04 Coupler of surface acoustic wave

Publications (1)

Publication Number Publication Date
JPS57129514A true JPS57129514A (en) 1982-08-11

Family

ID=11859183

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1437181A Pending JPS57129514A (en) 1981-02-04 1981-02-04 Coupler of surface acoustic wave

Country Status (1)

Country Link
JP (1) JPS57129514A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100332575B1 (en) * 1999-06-10 2002-04-17 김학열 A cosmetic case with a light
KR100338485B1 (en) * 1999-08-21 2002-05-30 강호진 A powder compact
US6577210B1 (en) * 1998-03-11 2003-06-10 Fujitsu Limited Surface acoustic wave filter having plural propagation paths and a coupler
KR100397957B1 (en) * 2000-12-21 2003-09-19 이연우 The multi function unit for cosmetic with lighting and observation

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6577210B1 (en) * 1998-03-11 2003-06-10 Fujitsu Limited Surface acoustic wave filter having plural propagation paths and a coupler
KR100332575B1 (en) * 1999-06-10 2002-04-17 김학열 A cosmetic case with a light
KR100338485B1 (en) * 1999-08-21 2002-05-30 강호진 A powder compact
KR100397957B1 (en) * 2000-12-21 2003-09-19 이연우 The multi function unit for cosmetic with lighting and observation

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