JPS55112018A - Elastic surface wave device - Google Patents

Elastic surface wave device

Info

Publication number
JPS55112018A
JPS55112018A JP1921279A JP1921279A JPS55112018A JP S55112018 A JPS55112018 A JP S55112018A JP 1921279 A JP1921279 A JP 1921279A JP 1921279 A JP1921279 A JP 1921279A JP S55112018 A JPS55112018 A JP S55112018A
Authority
JP
Japan
Prior art keywords
converter
elastic surface
surface wave
converters
unilateral
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
JP1921279A
Other languages
Japanese (ja)
Inventor
Osamu Yamazaki
Tsuneo Mitsuyu
Kiyotaka Wasa
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 JP1921279A priority Critical patent/JPS55112018A/en
Publication of JPS55112018A publication Critical patent/JPS55112018A/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 as well as the triple transit echo by distributing the two-way converter between the comb-line electrode unilateral converters. CONSTITUTION:When the high-frequency voltage is applied to connection terminals 18 and 19 of two-way converter 14, the elastic surface wave is excited and then propagated to both sides of converter 14. If unilateral converters 12 and 13 located at the both ends are distributed equidistantly from converter 14 at the center or either one of the unilateral converters is located at the position which is apart by the integer-fold value of the length of the elastic surface wave, the elastic surface wave excited by converter 14 can be received in a high efficiency. Also if the tuning is secured for converter 14, the elastic surface waves entering through both ends are offset to each other and never emerge at terminals 18 and 19. As a result, the reduction can be secured for the effect of the triple transit echo caused by the reflection among electrodes.
JP1921279A 1979-02-20 1979-02-20 Elastic surface wave device Pending JPS55112018A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1921279A JPS55112018A (en) 1979-02-20 1979-02-20 Elastic surface wave device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1921279A JPS55112018A (en) 1979-02-20 1979-02-20 Elastic surface wave device

Publications (1)

Publication Number Publication Date
JPS55112018A true JPS55112018A (en) 1980-08-29

Family

ID=11993055

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1921279A Pending JPS55112018A (en) 1979-02-20 1979-02-20 Elastic surface wave device

Country Status (1)

Country Link
JP (1) JPS55112018A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5989024A (en) * 1982-11-12 1984-05-23 Oki Electric Ind Co Ltd Surface acoustic wave filter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5989024A (en) * 1982-11-12 1984-05-23 Oki Electric Ind Co Ltd Surface acoustic wave filter

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