GB1247469A - Dispersive delay line system - Google Patents

Dispersive delay line system

Info

Publication number
GB1247469A
GB1247469A GB3122870A GB3122870A GB1247469A GB 1247469 A GB1247469 A GB 1247469A GB 3122870 A GB3122870 A GB 3122870A GB 3122870 A GB3122870 A GB 3122870A GB 1247469 A GB1247469 A GB 1247469A
Authority
GB
United Kingdom
Prior art keywords
delay lines
transducers
film
line system
june
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
GB3122870A
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
Thomson CSF 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 Thomson CSF SA filed Critical Thomson CSF SA
Publication of GB1247469A publication Critical patent/GB1247469A/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
    • H03H9/42—Time-delay networks using surface acoustic waves
    • H03H9/44—Frequency dependent delay lines, e.g. dispersive delay lines

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)

Abstract

1,247,469. Electromechanical delay lines. THOMSON-CSF. 26 June, 1970 [26 June, 1969], No. 31228/70. Heading H3U. A dispersive-type delay line system employing acoustic surface waves comprises a substrate 1 of circular cross-section having on its upper surface a thin film 2 of a material through which elastic shear waves may be propagated. Two separate delay lines are formed by respective pairs of electrostrictive transducers 3, 4 and 13, 14 having electrodes 5, 6 and 15, 16 respectively. The transducers are all mounted on the film 2 which serves as the other, common, electrode. To minimize interference between the two delay lines the intervening sectorshaped surfaces 10 of the film 2 may be grooved or, alternatively, the surfaces maybe covered with vibration absorbent material. In another embodiment (Fig. 3, not shown), three separate delay lines are formed by six transducers angularly spaced at 60 degrees around the substrate 1. A method of manufacture is described with reference to Figs. 4-8 (not shown).
GB3122870A 1969-06-26 1970-06-26 Dispersive delay line system Expired GB1247469A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6921427A FR2050821A5 (en) 1969-06-26 1969-06-26

Publications (1)

Publication Number Publication Date
GB1247469A true GB1247469A (en) 1971-09-22

Family

ID=9036395

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3122870A Expired GB1247469A (en) 1969-06-26 1970-06-26 Dispersive delay line system

Country Status (4)

Country Link
DE (1) DE2029723B2 (en)
FR (1) FR2050821A5 (en)
GB (1) GB1247469A (en)
NL (1) NL7009178A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02189015A (en) * 1989-01-17 1990-07-25 Clarion Co Ltd Surface acoustic wave device

Also Published As

Publication number Publication date
NL7009178A (en) 1970-12-29
DE2029723A1 (en) 1971-01-07
DE2029723B2 (en) 1972-06-22
FR2050821A5 (en) 1971-04-02

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