JPS57135518A - Surface acoustic wave device - Google Patents

Surface acoustic wave device

Info

Publication number
JPS57135518A
JPS57135518A JP2013981A JP2013981A JPS57135518A JP S57135518 A JPS57135518 A JP S57135518A JP 2013981 A JP2013981 A JP 2013981A JP 2013981 A JP2013981 A JP 2013981A JP S57135518 A JPS57135518 A JP S57135518A
Authority
JP
Japan
Prior art keywords
acoustic wave
surface acoustic
electrode
phase
quarter
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
JP2013981A
Other languages
Japanese (ja)
Other versions
JPH025328B2 (en
Inventor
Takeshi Okamoto
Shoichi Minagawa
Seiji Mori
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.)
Faurecia Clarion Electronics Co Ltd
Original Assignee
Clarion 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 Clarion Co Ltd filed Critical Clarion Co Ltd
Priority to JP2013981A priority Critical patent/JPS57135518A/en
Publication of JPS57135518A publication Critical patent/JPS57135518A/en
Publication of JPH025328B2 publication Critical patent/JPH025328B2/ja
Granted 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
    • H03H9/14505—Unidirectional SAW transducers

Landscapes

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

Abstract

PURPOSE:To obtain a unidirectional and wide-band transducer by shifting an electrode part in a surface acoustic wave propagation direction by a quarter as long as the wavelength of a surface acoustic wave having a center frequency. CONSTITUTION:Electrode parts 2 and 3 consists of couples of electrode pieces 6-9 crossing mutually on a piezoelectric material substrate 1. The one-side electrode pieces 6 and 7 are brought into contact with each other along electrode crossing width (b) to be grounded in common, and both the electrode parts 2 and 3 are shifted in a surface acoustic wave propagation direction by a quarter as long as the wavelength of a surface acoustic wave having a center frequency. A phase shifter 4 is connected to the other-side electrode pieces 8 and 9 to give a phase difference for prescribed frequency characteristics. Thus, the phase shifter 4 change phase conditions according to the frequency of an input signal to give a 0 deg. phase differnece to a surface acoustic wave traveling in one direction and a 180 deg. phase difference to each surface acoustic wave traveling in the opposite direction over a wide range.
JP2013981A 1981-02-16 1981-02-16 Surface acoustic wave device Granted JPS57135518A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2013981A JPS57135518A (en) 1981-02-16 1981-02-16 Surface acoustic wave device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2013981A JPS57135518A (en) 1981-02-16 1981-02-16 Surface acoustic wave device

Publications (2)

Publication Number Publication Date
JPS57135518A true JPS57135518A (en) 1982-08-21
JPH025328B2 JPH025328B2 (en) 1990-02-01

Family

ID=12018797

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2013981A Granted JPS57135518A (en) 1981-02-16 1981-02-16 Surface acoustic wave device

Country Status (1)

Country Link
JP (1) JPS57135518A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0255360A2 (en) * 1986-07-29 1988-02-03 R.F. Monolithics, Inc. Quartz crystal for surface acoustic wave device
EP0255361A2 (en) * 1986-07-29 1988-02-03 R.F. Monolithics, Inc. Quartz crystal for surface acoustic wave device
CN111527698A (en) * 2018-01-19 2020-08-11 华为技术有限公司 Surface acoustic wave device having unidirectional transducer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0255360A2 (en) * 1986-07-29 1988-02-03 R.F. Monolithics, Inc. Quartz crystal for surface acoustic wave device
EP0255361A2 (en) * 1986-07-29 1988-02-03 R.F. Monolithics, Inc. Quartz crystal for surface acoustic wave device
CN111527698A (en) * 2018-01-19 2020-08-11 华为技术有限公司 Surface acoustic wave device having unidirectional transducer
CN111527698B (en) * 2018-01-19 2022-05-10 华为技术有限公司 Surface acoustic wave device having unidirectional transducer

Also Published As

Publication number Publication date
JPH025328B2 (en) 1990-02-01

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