JPS579121A - Elastic surface wave device - Google Patents

Elastic surface wave device

Info

Publication number
JPS579121A
JPS579121A JP8290280A JP8290280A JPS579121A JP S579121 A JPS579121 A JP S579121A JP 8290280 A JP8290280 A JP 8290280A JP 8290280 A JP8290280 A JP 8290280A JP S579121 A JPS579121 A JP S579121A
Authority
JP
Japan
Prior art keywords
electrode
crossing width
elastic surface
input
taking
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
JP8290280A
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 JP8290280A priority Critical patent/JPS579121A/en
Publication of JPS579121A publication Critical patent/JPS579121A/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
    • H03H9/14502—Surface acoustic wave [SAW] transducers for a particular purpose
    • H03H9/14508—Polyphase SAW transducers

Landscapes

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

Abstract

PURPOSE:To suppress multiple reflection through the improvement of insertion loss, by taking an input electrode of a reed-screen shape as normal type unidirectional electrode construction constant in electrode crossing width, and taking the output electrode as bidirectional electrode construction weighted in changed electrode crossing width. CONSTITUTION:On a piezoelectric substrate 1, an input electrode 6 using a unidirectional electrode in which the electrode crossing width of 2-pair and 3-group is constant, a phase shifter 7 using a coil with core and a series resistor is connected to the input electrode 6, and an electric signal is converted into elastic surface waves at the input electrode 6 and it is propagated on the substrate 1 in the direction of the X axis. On the other hand, 50 pairs of bidirectional electrodes weighted in the electrode crossing width are provided as the output electrodes 5 to convert the elastic surface waves into electric signals again.
JP8290280A 1980-06-20 1980-06-20 Elastic surface wave device Pending JPS579121A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8290280A JPS579121A (en) 1980-06-20 1980-06-20 Elastic surface wave device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8290280A JPS579121A (en) 1980-06-20 1980-06-20 Elastic surface wave device

Publications (1)

Publication Number Publication Date
JPS579121A true JPS579121A (en) 1982-01-18

Family

ID=13787180

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8290280A Pending JPS579121A (en) 1980-06-20 1980-06-20 Elastic surface wave device

Country Status (1)

Country Link
JP (1) JPS579121A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5556716A (en) * 1978-10-24 1980-04-25 Matsushita Electric Ind Co Ltd Elastic surface wave device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5556716A (en) * 1978-10-24 1980-04-25 Matsushita Electric Ind Co Ltd Elastic surface wave device

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