JPS5518141A - Elastic surface wave device - Google Patents

Elastic surface wave device

Info

Publication number
JPS5518141A
JPS5518141A JP9079778A JP9079778A JPS5518141A JP S5518141 A JPS5518141 A JP S5518141A JP 9079778 A JP9079778 A JP 9079778A JP 9079778 A JP9079778 A JP 9079778A JP S5518141 A JPS5518141 A JP S5518141A
Authority
JP
Japan
Prior art keywords
surface wave
electrode finger
transducer
waves
coupler
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
JP9079778A
Other languages
Japanese (ja)
Other versions
JPS5834048B2 (en
Inventor
Michio Kadota
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.)
Murata Manufacturing Co Ltd
Original Assignee
Murata Manufacturing 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 Murata Manufacturing Co Ltd filed Critical Murata Manufacturing Co Ltd
Priority to JP9079778A priority Critical patent/JPS5834048B2/en
Publication of JPS5518141A publication Critical patent/JPS5518141A/en
Publication of JPS5834048B2 publication Critical patent/JPS5834048B2/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 devices; Electromechanical resonators
    • H03H9/02—Details
    • H03H9/02535—Details of surface acoustic wave devices
    • H03H9/02818—Means for compensation or elimination of undesirable effects
    • H03H9/02874—Means for compensation or elimination of undesirable effects of direct coupling between input and output transducers

Abstract

PURPOSE:To realize reduction of the spurious by earthing at least one piece of the electrode finger of the multi-strip coupler and then suppressing the direct-reaching waves. CONSTITUTION:Input/output transducer 11 and 12 are installed so taht their transmission lines may not overlap each other, and electrode fingers 14-20 are distributed on piezoelectric substance 10 in parallel to each other and with a proper space between. Now transducer 11 is excited with application of the signal waves, and thus the surface wave propagates in right-angled direction A to the electrode finger and along the surface of substance 10 to reach multi-strip coupler 13 for excitaion. The excited surface wave propagates in direction B and reaches transducer 12. Thus the output voltage is drawn out of terminal 25 and 26. In this case, at least one piece of the electrode finger of coupler 13 is earthed to suppress the direct-reaching waves, thus reducing the spurious.
JP9079778A 1978-07-24 1978-07-24 surface acoustic wave device Expired JPS5834048B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9079778A JPS5834048B2 (en) 1978-07-24 1978-07-24 surface acoustic wave device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9079778A JPS5834048B2 (en) 1978-07-24 1978-07-24 surface acoustic wave device

Publications (2)

Publication Number Publication Date
JPS5518141A true JPS5518141A (en) 1980-02-08
JPS5834048B2 JPS5834048B2 (en) 1983-07-23

Family

ID=14008568

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9079778A Expired JPS5834048B2 (en) 1978-07-24 1978-07-24 surface acoustic wave device

Country Status (1)

Country Link
JP (1) JPS5834048B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS594215A (en) * 1982-06-29 1984-01-11 Fujitsu Ltd Surface acoustic wave device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60207649A (en) * 1984-03-30 1985-10-19 株式会社東芝 Ultrasonic diagnostic apparatus
JPS6234545A (en) * 1985-08-07 1987-02-14 株式会社東芝 Mechanical sector probe

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS594215A (en) * 1982-06-29 1984-01-11 Fujitsu Ltd Surface acoustic wave device
JPH0145772B2 (en) * 1982-06-29 1989-10-04 Fujitsu Ltd

Also Published As

Publication number Publication date
JPS5834048B2 (en) 1983-07-23

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