JPS55107316A - Unidirectional converter for surface acoustic wave - Google Patents

Unidirectional converter for surface acoustic wave

Info

Publication number
JPS55107316A
JPS55107316A JP1437079A JP1437079A JPS55107316A JP S55107316 A JPS55107316 A JP S55107316A JP 1437079 A JP1437079 A JP 1437079A JP 1437079 A JP1437079 A JP 1437079A JP S55107316 A JPS55107316 A JP S55107316A
Authority
JP
Japan
Prior art keywords
surface acoustic
acoustic waves
propagation direction
frequency
lambda
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
JP1437079A
Other languages
Japanese (ja)
Other versions
JPS625368B2 (en
Inventor
Yasutaka Shimizu
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP1437079A priority Critical patent/JPS55107316A/en
Publication of JPS55107316A publication Critical patent/JPS55107316A/en
Publication of JPS625368B2 publication Critical patent/JPS625368B2/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
    • 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
    • H03H9/0296—Surface acoustic wave [SAW] devices having both acoustic and non-acoustic properties

Landscapes

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

Abstract

PURPOSE:To enable to oscillate surface acoustic waves only unidirectionally, by using the speed change of surface acoustic waves by DC magnetic field. CONSTITUTION:The reed screen electrodes 2A, 2B are formed on the magnetic substance board 1, and the piezoelectric film 3 is formed on it. Further, to the desired propagation direction P on the board 1, DC magnetic field H is fed with a slope. With this constitution, taking the frequency propagating on the board 1 as f, wave length as lambda, and velocity as V, V=flambda is established. Since DC magnetic field H is fed, the velocity of surface acoustic waves toward desired propagation P is changed to V1, and the velocity of propagation direction Q is changed to V2 respectively and V1not equal to V2 is obtained. Thus, the frequency toward P is f1=v1/lambda, and the frequency of propagation direction Q is as f2=V2/lambda, and consequently, excitation is made with the resonant frequency f1 of desired propagation direction P, then surface acoustic waves are toward P to increase the energy conversion efficiency between electric and acoustic waves.
JP1437079A 1979-02-13 1979-02-13 Unidirectional converter for surface acoustic wave Granted JPS55107316A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1437079A JPS55107316A (en) 1979-02-13 1979-02-13 Unidirectional converter for surface acoustic wave

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1437079A JPS55107316A (en) 1979-02-13 1979-02-13 Unidirectional converter for surface acoustic wave

Publications (2)

Publication Number Publication Date
JPS55107316A true JPS55107316A (en) 1980-08-18
JPS625368B2 JPS625368B2 (en) 1987-02-04

Family

ID=11859152

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1437079A Granted JPS55107316A (en) 1979-02-13 1979-02-13 Unidirectional converter for surface acoustic wave

Country Status (1)

Country Link
JP (1) JPS55107316A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113938790A (en) * 2021-10-15 2022-01-14 江苏科技大学 Sound one-way propagation master control method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113938790A (en) * 2021-10-15 2022-01-14 江苏科技大学 Sound one-way propagation master control method
CN113938790B (en) * 2021-10-15 2023-12-22 江苏科技大学 Sound unidirectional propagation master control method

Also Published As

Publication number Publication date
JPS625368B2 (en) 1987-02-04

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