GB1131442A - Dispersive acoustic line - Google Patents

Dispersive acoustic line

Info

Publication number
GB1131442A
GB1131442A GB19324/66A GB1932466A GB1131442A GB 1131442 A GB1131442 A GB 1131442A GB 19324/66 A GB19324/66 A GB 19324/66A GB 1932466 A GB1932466 A GB 1932466A GB 1131442 A GB1131442 A GB 1131442A
Authority
GB
United Kingdom
Prior art keywords
cavity
fluid
acoustic
waveguide
air
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.)
Expired
Application number
GB19324/66A
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.)
Thales SA
Original Assignee
CSF Compagnie Generale de Telegraphie sans Fil SA
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 CSF Compagnie Generale de Telegraphie sans Fil SA filed Critical CSF Compagnie Generale de Telegraphie sans Fil SA
Publication of GB1131442A publication Critical patent/GB1131442A/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
    • H03H9/30—Time-delay networks
    • H03H9/40—Frequency dependent delay lines, e.g. dispersive delay lines

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Transducers For Ultrasonic Waves (AREA)

Abstract

1,131,442. Electro-mechanical delay lines. CSF-COMPAGNIE GENERALE DE TELEGRAPHIE SANS FIL. 2 May, 1966 [3 May, 1965], No. 19324/66. Heading H3U. A dispersive acoustic delay line for compressing pulses frequency-modulated on a carrier wave comprises a box-like waveguide 4 divided by a very thin impermeable diaphragm 7 into a first lower cavity 1 and an upper superimposed second cavity 2. Each cavity is filled with a fluid, the fluid of the first cavity 1 having a higher phase velocity for acoustic waves propagated therein than the fluid of the second cavity 2. For example, the fluid of cavity 1 may be air and cavity 2 may contain sulphur hexafluoride; alternatively, cavity 1 may contain helium and cavity 2 may contain sulphur hexafluoride, carbon dioxide, or air. Electromagnetic transducers 10, 11 coupled to the fluid in the cavity 2 act, respectively, as a transmitter and receiver, the acoustic compressional wave being transmitted through the two fluids. The Specification sets out the underlying theory. In a modification (Fig. 6, not shown) the waveguide is in the form of a spiral.
GB19324/66A 1965-05-03 1966-05-02 Dispersive acoustic line Expired GB1131442A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR15518A FR1452050A (en) 1965-05-03 1965-05-03 Dispersive acoustic lines

Publications (1)

Publication Number Publication Date
GB1131442A true GB1131442A (en) 1968-10-23

Family

ID=8577826

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19324/66A Expired GB1131442A (en) 1965-05-03 1966-05-02 Dispersive acoustic line

Country Status (5)

Country Link
US (1) US3435381A (en)
DE (1) DE1267762B (en)
FR (1) FR1452050A (en)
GB (1) GB1131442A (en)
NL (1) NL6605950A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3581248A (en) * 1969-03-26 1971-05-25 Zenith Radio Corp Acoustic filters
US3760204A (en) * 1972-03-01 1973-09-18 Motorola Inc Acoustic surface wave resonator
GB1438777A (en) * 1973-09-04 1976-06-09 Mullard Ltd Electromechanical propagation devices and the manufacture thereof
JPS5426349B2 (en) * 1973-10-26 1979-09-03
US4649392A (en) * 1983-01-24 1987-03-10 Sanders Associates, Inc. Two dimensional transform utilizing ultrasonic dispersive delay line
FR2751095B1 (en) * 1996-07-09 1998-10-30 Thomson Csf DEVICE FOR CONTROLLING LIGHT PULSES BY AN ACOUSTO-OPTIC PROGRAMMABLE DEVICE
GB0021114D0 (en) * 2000-08-29 2000-10-11 Univ Sheffield Method and apparatus for determining thickness of lubricant film

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1390365A (en) * 1964-01-15 1965-02-26 Csf Acoustic propagation line for compressing electric wave trains

Also Published As

Publication number Publication date
DE1267762B (en) 1968-05-09
FR1452050A (en) 1966-02-25
NL6605950A (en) 1966-11-04
US3435381A (en) 1969-03-25

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