JPS57162818A - Surface acoustic wave device - Google Patents

Surface acoustic wave device

Info

Publication number
JPS57162818A
JPS57162818A JP4877781A JP4877781A JPS57162818A JP S57162818 A JPS57162818 A JP S57162818A JP 4877781 A JP4877781 A JP 4877781A JP 4877781 A JP4877781 A JP 4877781A JP S57162818 A JPS57162818 A JP S57162818A
Authority
JP
Japan
Prior art keywords
electrodes
electrode
acoustic wave
dielectric substance
surface acoustic
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
JP4877781A
Other languages
Japanese (ja)
Inventor
Kiyoshi Asakawa
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP4877781A priority Critical patent/JPS57162818A/en
Publication of JPS57162818A publication Critical patent/JPS57162818A/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
    • H03H9/02535—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

Abstract

PURPOSE:To suppress the spread due to diffraction of surface wave beams, by forming an apodized electrode and a normal electrode on the surface of a piezoelectric substrate and forming a split type surface wave guide path between both the electrodes with a dielectric substance film while covering both the electrodes. CONSTITUTION:A transmission/reception reed screen electrode consisting of an apodized electrode 21 and a normal electrode 22 is formed on the surface of a piezoelectric substrate. A surface acoustic wave guide path 23 consisting of a plurality of parallel dielectric substance stripes is formed between the reed screen electrodes 21 and 22 toward the surface acoustic wave propagating direction by permitting to cover the electrodes 21 and 22. Thus, in comparison with a free surface where each dielectric substance film loading surface of the path 23 gives no loading to adjacent dielectric substances, the propagation speed of the surface waves based on the mass addition effect can be delayed. Then, the surface wave energy is enclosed in a region where the propagation speed is slow and the surface wave beam can be transmitted without being spread.
JP4877781A 1981-04-01 1981-04-01 Surface acoustic wave device Pending JPS57162818A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4877781A JPS57162818A (en) 1981-04-01 1981-04-01 Surface acoustic wave device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4877781A JPS57162818A (en) 1981-04-01 1981-04-01 Surface acoustic wave device

Publications (1)

Publication Number Publication Date
JPS57162818A true JPS57162818A (en) 1982-10-06

Family

ID=12812684

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4877781A Pending JPS57162818A (en) 1981-04-01 1981-04-01 Surface acoustic wave device

Country Status (1)

Country Link
JP (1) JPS57162818A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012076517A1 (en) * 2010-12-07 2012-06-14 Epcos Ag Electroacoustic transducer with reduced losses due to transversal emission and improved performance due to suppression of transversal modes

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012076517A1 (en) * 2010-12-07 2012-06-14 Epcos Ag Electroacoustic transducer with reduced losses due to transversal emission and improved performance due to suppression of transversal modes
JP2014500681A (en) * 2010-12-07 2014-01-09 エプコス アクチエンゲゼルシャフト Electroacoustic transducer with reduced loss due to lateral emission and improved operation by suppressing lateral modes
US9391256B2 (en) 2010-12-07 2016-07-12 Epcos Ag Electroacoustic transducer with reduced losses due to transverse emission and improved performance due to suppression of transverse modes

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