JPS55153415A - Surface acoustic wave device - Google Patents

Surface acoustic wave device

Info

Publication number
JPS55153415A
JPS55153415A JP6180979A JP6180979A JPS55153415A JP S55153415 A JPS55153415 A JP S55153415A JP 6180979 A JP6180979 A JP 6180979A JP 6180979 A JP6180979 A JP 6180979A JP S55153415 A JPS55153415 A JP S55153415A
Authority
JP
Japan
Prior art keywords
conductive film
acoustic wave
surface acoustic
wave device
meander electrode
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
JP6180979A
Other languages
Japanese (ja)
Inventor
Kentaro Setsune
Susumu Ide
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP6180979A priority Critical patent/JPS55153415A/en
Publication of JPS55153415A publication Critical patent/JPS55153415A/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 reduce the insertion loss for the surface acoustic wave device of three phase excitation and unidirectioality, by providing the piezoelectric thin film on the elastic substrate and conductive film selectively on it. CONSTITUTION:The comb type electrodes 26, 28 are opposed on the surface of the elastic substrate 20, the meander electrode 27 is provided between them, to form one three phase exciting section per two wave-lengths. Further, the piezoelectric thin film 21 of a given thickness is provided on it, and the conductive film 23 is placed on it by eliminating a part of the meander electrode, that is, the upper part of the meander electrode 27 independently of the three phase excitation. Since the conductive film 23 is formed by eliminating the part affecting the conversion efficiency, the efficiency is increased and the insertion loss is reduced.
JP6180979A 1979-05-18 1979-05-18 Surface acoustic wave device Pending JPS55153415A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6180979A JPS55153415A (en) 1979-05-18 1979-05-18 Surface acoustic wave device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6180979A JPS55153415A (en) 1979-05-18 1979-05-18 Surface acoustic wave device

Publications (1)

Publication Number Publication Date
JPS55153415A true JPS55153415A (en) 1980-11-29

Family

ID=13181779

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6180979A Pending JPS55153415A (en) 1979-05-18 1979-05-18 Surface acoustic wave device

Country Status (1)

Country Link
JP (1) JPS55153415A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57155820A (en) * 1981-03-20 1982-09-27 Fujitsu General Ltd Unidirectional saw exciter

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5345837B2 (en) * 1974-04-27 1978-12-09

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5345837B2 (en) * 1974-04-27 1978-12-09

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57155820A (en) * 1981-03-20 1982-09-27 Fujitsu General Ltd Unidirectional saw exciter

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