JPS54100238A - Elastic surface wave resonator - Google Patents

Elastic surface wave resonator

Info

Publication number
JPS54100238A
JPS54100238A JP694378A JP694378A JPS54100238A JP S54100238 A JPS54100238 A JP S54100238A JP 694378 A JP694378 A JP 694378A JP 694378 A JP694378 A JP 694378A JP S54100238 A JPS54100238 A JP S54100238A
Authority
JP
Japan
Prior art keywords
bit
surface wave
weighting
reflector
elastic surface
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
JP694378A
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 JP694378A priority Critical patent/JPS54100238A/en
Publication of JPS54100238A publication Critical patent/JPS54100238A/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
    • H03H9/02637—Details concerning reflective or coupling arrays
    • H03H9/02645—Waffle-iron or dot arrays
    • 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
    • H03H9/14538—Formation

Landscapes

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

Abstract

PURPOSE:To ensure the high-accuracy weighting for the reflector by constituting the distribution-type reflector of the elastic surface wave resonator with the bit aggregate. CONSTITUTION:In diagram A, bit 22 is formed on the surface of the piezoelectric material substrate such as ST-cut crystal substrate 21 via the ion beam etching device. Bits 22 are arrayed on straight line row 25 nearly equidistantly. Straight lines 25 are disposed with distance of 1/2 waveform of the surface wave. As the mass lacks for bit 22 at its periphery, the surface wave entered from the direction of arrow 23 is reflected at each bit. And only the reflective waves whose intermediate phases are overlapped each other are compounded to be reflected in the direction of arrow 24 and thus to form an effective surface wave reflector. While in diagram B, bit 31 is formed along straight line row 32, and the number of the bit differs with each array and with the weighting given. The weighting is also possible by filling up the bit with the material which varies the propagation velocity of the elastic surface wave.
JP694378A 1978-01-24 1978-01-24 Elastic surface wave resonator Pending JPS54100238A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP694378A JPS54100238A (en) 1978-01-24 1978-01-24 Elastic surface wave resonator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP694378A JPS54100238A (en) 1978-01-24 1978-01-24 Elastic surface wave resonator

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP19143686A Division JPS6242607A (en) 1986-08-15 1986-08-15 Surface acoustic wave resonator

Publications (1)

Publication Number Publication Date
JPS54100238A true JPS54100238A (en) 1979-08-07

Family

ID=11652316

Family Applications (1)

Application Number Title Priority Date Filing Date
JP694378A Pending JPS54100238A (en) 1978-01-24 1978-01-24 Elastic surface wave resonator

Country Status (1)

Country Link
JP (1) JPS54100238A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4598224A (en) * 1985-08-07 1986-07-01 The United States Of America As Represented By The Secretary Of The Army Surface acoustic wave device for sensing the presence of chemical agents
US6847272B2 (en) * 2003-02-28 2005-01-25 Northrop Grumman Corporation Weighted SAW reflector using distributed acoustic reflective dots
US7939987B1 (en) * 2008-10-23 2011-05-10 Triquint Semiconductor, Inc. Acoustic wave device employing reflective elements for confining elastic energy

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
APPLIED PHYSICS LETTERS=1976 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4598224A (en) * 1985-08-07 1986-07-01 The United States Of America As Represented By The Secretary Of The Army Surface acoustic wave device for sensing the presence of chemical agents
US6847272B2 (en) * 2003-02-28 2005-01-25 Northrop Grumman Corporation Weighted SAW reflector using distributed acoustic reflective dots
US7939987B1 (en) * 2008-10-23 2011-05-10 Triquint Semiconductor, Inc. Acoustic wave device employing reflective elements for confining elastic energy

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