DE69004778T2 - Richtwandler für Oberflächenwellen. - Google Patents

Richtwandler für Oberflächenwellen.

Info

Publication number
DE69004778T2
DE69004778T2 DE1990604778 DE69004778T DE69004778T2 DE 69004778 T2 DE69004778 T2 DE 69004778T2 DE 1990604778 DE1990604778 DE 1990604778 DE 69004778 T DE69004778 T DE 69004778T DE 69004778 T2 DE69004778 T2 DE 69004778T2
Authority
DE
Germany
Prior art keywords
surface waves
directional converter
directional
converter
waves
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 - Fee Related
Application number
DE1990604778
Other languages
English (en)
Other versions
DE69004778D1 (de
Inventor
Pierre Dufilie
Jean Desbois
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9386603&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE69004778(T2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Thomson CSF SA filed Critical Thomson CSF SA
Application granted granted Critical
Publication of DE69004778D1 publication Critical patent/DE69004778D1/de
Publication of DE69004778T2 publication Critical patent/DE69004778T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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)
DE1990604778 1989-10-20 1990-10-16 Richtwandler für Oberflächenwellen. Expired - Fee Related DE69004778T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8913747A FR2653632B1 (fr) 1989-10-20 1989-10-20 Transducteur d'ondes de surface unidirectionnel.

Publications (2)

Publication Number Publication Date
DE69004778D1 DE69004778D1 (de) 1994-01-05
DE69004778T2 true DE69004778T2 (de) 1994-03-17

Family

ID=9386603

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1990604778 Expired - Fee Related DE69004778T2 (de) 1989-10-20 1990-10-16 Richtwandler für Oberflächenwellen.

Country Status (4)

Country Link
EP (1) EP0424240B1 (de)
JP (1) JPH03145316A (de)
DE (1) DE69004778T2 (de)
FR (1) FR2653632B1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2682833B1 (fr) * 1991-10-18 1993-12-03 Thomson Csf Filtre a ondes de surface et a trajet acoustique replie.
US5313177A (en) * 1992-04-06 1994-05-17 Motorola, Inc. Method and apparatus for an acoustic wave filter
FR2695771B1 (fr) * 1992-09-15 1994-10-28 Thomson Csf Transducteur d'ondes unidirectionnel.
FR2702899B1 (fr) * 1993-03-19 1995-05-12 Thomson Csf Transducteur à ondes de surface à réflexion acoustique distribuée et filtre comportant un tel transducteur.
US6147574A (en) * 1997-11-20 2000-11-14 Murata Manufacturing Co., Ltd. Unidirectional surface acoustic wave transducer and transversal-type saw filter having the same

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8327551D0 (en) * 1983-10-14 1983-11-16 Secr Defence Acoustic transducer
US4910839A (en) * 1984-12-03 1990-03-27 R.F. Monolithics, Inc. Method of making a single phase unidirectional surface acoustic wave transducer

Also Published As

Publication number Publication date
FR2653632A1 (fr) 1991-04-26
EP0424240B1 (de) 1993-11-24
JPH03145316A (ja) 1991-06-20
DE69004778D1 (de) 1994-01-05
EP0424240A1 (de) 1991-04-24
FR2653632B1 (fr) 1991-12-20

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Legal Events

Date Code Title Description
8380 Miscellaneous part iii

Free format text: DER INHABER IST ZU AENDERN IN:THOMSON-CSF, PARIS, FR

8363 Opposition against the patent
8339 Ceased/non-payment of the annual fee