JPS5469363A - Ultrasonic wave transducer - Google Patents

Ultrasonic wave transducer

Info

Publication number
JPS5469363A
JPS5469363A JP13687777A JP13687777A JPS5469363A JP S5469363 A JPS5469363 A JP S5469363A JP 13687777 A JP13687777 A JP 13687777A JP 13687777 A JP13687777 A JP 13687777A JP S5469363 A JPS5469363 A JP S5469363A
Authority
JP
Japan
Prior art keywords
rhm
waves
electrodes
reed screen
screen electrodes
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
JP13687777A
Other languages
Japanese (ja)
Other versions
JPS5910610B2 (en
Inventor
Koji Toda
Yoshinari Yamashita
Isao Matsufuji
Koji Takahashi
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.)
TDK Corp
Original Assignee
TDK Corp
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 TDK Corp filed Critical TDK Corp
Priority to JP52136877A priority Critical patent/JPS5910610B2/en
Publication of JPS5469363A publication Critical patent/JPS5469363A/en
Publication of JPS5910610B2 publication Critical patent/JPS5910610B2/en
Expired 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 elements; Electromechanical resonators
    • H03H9/02—Details
    • H03H9/02535—Details of surface acoustic wave devices
    • H03H9/02637—Details concerning reflective or coupling arrays
    • 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
    • H03H9/02889—Means for compensation or elimination of undesirable effects of influence of mass loading

Landscapes

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

Abstract

PURPOSE:to reduce spurious extremely, increase efficiency and stabilize the device by connecting the surface electrode formed according to reed screen electrodes with one of the reed screen electrodes. CONSTITUTION:A pair of reed screen electrodes 3 and 4 are set on one surface 2 of thin plate type piezo-electric material 1 interdigitally and surface electrode 6 is set on the other surface 5; electrodes 6 and 4 are connected and used as an electrode for earthing. Generally, rhm waves exist in regions A and B with small d (thickness of propagation) against requested frequency f and have different characteristics from Rayleigh's wave (surface elastic wave). The rhm waves are generated in the media with thin thickness less than 5lambda and there is region B where speed is changed sharply and region A with the constant speed. By using the characteristics of rhm waves, only rhm waves of zero objective mode are excited and transferred effectively and excitment and transfer of other modes are supressed, so that a transduser with extremely low spurious is available.
JP52136877A 1977-11-15 1977-11-15 ultrasonic transducer Expired JPS5910610B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP52136877A JPS5910610B2 (en) 1977-11-15 1977-11-15 ultrasonic transducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP52136877A JPS5910610B2 (en) 1977-11-15 1977-11-15 ultrasonic transducer

Publications (2)

Publication Number Publication Date
JPS5469363A true JPS5469363A (en) 1979-06-04
JPS5910610B2 JPS5910610B2 (en) 1984-03-10

Family

ID=15185612

Family Applications (1)

Application Number Title Priority Date Filing Date
JP52136877A Expired JPS5910610B2 (en) 1977-11-15 1977-11-15 ultrasonic transducer

Country Status (1)

Country Link
JP (1) JPS5910610B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008516490A (en) * 2004-10-11 2008-05-15 エプコス アクチエンゲゼルシャフト Element operating by acoustic wave and method of manufacturing the element

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS513151A (en) * 1974-06-26 1976-01-12 Tokyo Shibaura Electric Co DANSEI HYOMENHASOCHI

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS513151A (en) * 1974-06-26 1976-01-12 Tokyo Shibaura Electric Co DANSEI HYOMENHASOCHI

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008516490A (en) * 2004-10-11 2008-05-15 エプコス アクチエンゲゼルシャフト Element operating by acoustic wave and method of manufacturing the element
US8471652B2 (en) 2004-10-11 2013-06-25 Epcos Ag Component that operates using acoustic waves and method for producing said component

Also Published As

Publication number Publication date
JPS5910610B2 (en) 1984-03-10

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