FR2445605A1 - Cathode a chauffage direct et tube electronique haute frequence comportant une telle cathode - Google Patents

Cathode a chauffage direct et tube electronique haute frequence comportant une telle cathode

Info

Publication number
FR2445605A1
FR2445605A1 FR7836487A FR7836487A FR2445605A1 FR 2445605 A1 FR2445605 A1 FR 2445605A1 FR 7836487 A FR7836487 A FR 7836487A FR 7836487 A FR7836487 A FR 7836487A FR 2445605 A1 FR2445605 A1 FR 2445605A1
Authority
FR
France
Prior art keywords
cathode
high frequency
direct heating
frequency electronic
electronic tube
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
FR7836487A
Other languages
English (en)
Other versions
FR2445605B1 (fr
Inventor
Guy Clerc
Arvind Shroff
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=9216585&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=FR2445605(A1) "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
Priority to FR7836487A priority Critical patent/FR2445605A1/fr
Priority to EP79400941A priority patent/EP0013201B1/fr
Priority to DE7979400941T priority patent/DE2962924D1/de
Publication of FR2445605A1 publication Critical patent/FR2445605A1/fr
Application granted granted Critical
Publication of FR2445605B1 publication Critical patent/FR2445605B1/fr
Priority to US06/303,464 priority patent/US4429250A/en
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/02—Electrodes; Magnetic control means; Screens
    • H01J23/04—Cathodes
    • H01J23/05—Cathodes having a cylindrical emissive surface, e.g. cathodes for magnetrons
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
    • H01J1/02—Main electrodes
    • H01J1/13—Solid thermionic cathodes
    • H01J1/15—Cathodes heated directly by an electric current

Abstract

L'invention a pour objet une cathode à émission thermoélectronique à chauffage direct. Elle comporte un support 1 en graphite pyrolytique et un matériau thermoémissif 2 à base d'hexaborure de lanthane, ces deux éléments étant séparés par une couche 3 formant barrière de diffusion, constituée par un carbure de tantale ou de hafnium, un métal de la famille du platine, ou un composé de bore. Elle est utilisable notamment dans les tubes haute fréquence du type triode, tétrode ou pentode.
FR7836487A 1978-12-27 1978-12-27 Cathode a chauffage direct et tube electronique haute frequence comportant une telle cathode Granted FR2445605A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
FR7836487A FR2445605A1 (fr) 1978-12-27 1978-12-27 Cathode a chauffage direct et tube electronique haute frequence comportant une telle cathode
EP79400941A EP0013201B1 (fr) 1978-12-27 1979-11-30 Cathode à chauffage direct et tube électronique haute fréquence comportant une telle cathode
DE7979400941T DE2962924D1 (en) 1978-12-27 1979-11-30 Directly heated cathode and high frequency electron tube comprising such a cathode
US06/303,464 US4429250A (en) 1978-12-27 1981-09-18 Direct heating cathode for high frequency thermionic tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7836487A FR2445605A1 (fr) 1978-12-27 1978-12-27 Cathode a chauffage direct et tube electronique haute frequence comportant une telle cathode

Publications (2)

Publication Number Publication Date
FR2445605A1 true FR2445605A1 (fr) 1980-07-25
FR2445605B1 FR2445605B1 (fr) 1981-06-12

Family

ID=9216585

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7836487A Granted FR2445605A1 (fr) 1978-12-27 1978-12-27 Cathode a chauffage direct et tube electronique haute frequence comportant une telle cathode

Country Status (4)

Country Link
US (1) US4429250A (fr)
EP (1) EP0013201B1 (fr)
DE (1) DE2962924D1 (fr)
FR (1) FR2445605A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2498372A1 (fr) * 1981-01-16 1982-07-23 Thomson Csf Cathode a chauffage direct, son procede de fabrication, et tube electronique incorporant une telle cathode

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0143222B1 (fr) * 1983-09-30 1987-11-11 BBC Aktiengesellschaft Brown, Boveri & Cie. Cathode thermionique à haut pouvoir emissif pour tube électronique et son procédé de fabrication
JPS60221926A (ja) * 1984-04-19 1985-11-06 Sony Corp 放電表示装置の製造方法
JPS60221928A (ja) * 1984-04-19 1985-11-06 Sony Corp 放電表示装置の製造方法
US4994706A (en) * 1987-02-02 1991-02-19 The United States Of America As Represented By The United States Department Of Energy Field free, directly heated lanthanum boride cathode
CA1286710C (fr) * 1987-11-12 1991-07-23 Atomic Energy Of Canada Limited - Energie Atomique Du Canada, Limitee Canon electronique a cathode d'hexaborure de lanthane
GB2214704B (en) * 1988-01-20 1992-05-06 English Electric Valve Co Ltd Magnetrons
US5841219A (en) * 1993-09-22 1998-11-24 University Of Utah Research Foundation Microminiature thermionic vacuum tube
FR2733856B1 (fr) * 1995-05-05 1997-08-29 Thomson Tubes Electroniques Cathode pour canon a electrons a grille, grille destinee a etre associee avec une telle cathode et canon a electrons comportant une telle cathode
US5956002A (en) * 1996-03-28 1999-09-21 Tektronix, Inc. Structures and methods for limiting current in ionizable gaseous medium devices
US5955828A (en) * 1996-10-16 1999-09-21 University Of Utah Research Foundation Thermionic optical emission device
FR2775118B1 (fr) 1998-02-13 2000-05-05 Thomson Tubes Electroniques Grille pour tube electronique a faisceau axial a performances ameliorees
FR2789800B1 (fr) 1999-02-16 2001-05-11 Thomson Tubes Electroniques Generateur radiofrequence de tres grande puissance
DE102008020165A1 (de) * 2008-04-22 2009-10-29 Siemens Aktiengesellschaft Kathode mit einem Flachemitter
DE102008020163A1 (de) * 2008-04-22 2009-10-29 Siemens Aktiengesellschaft Kathode
US20090284124A1 (en) * 2008-04-22 2009-11-19 Wolfgang Kutschera Cathode composed of materials with different electron works functions

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR66913E (fr) * 1953-07-20 1957-10-31 Thomson Houston Comp Francaise Substances à pouvoir émissif élevé
DE1211724B (de) * 1963-06-07 1966-03-03 Telefunken Patent Gepresste Matrixkathode fuer elektrische Entladungsroehren
FR1539067A (fr) * 1966-08-05 1968-09-13 Siemens Ag Cathode à réserve pour tubes à décharge électrique, notamment pour tubes électroniques
FR2033868A5 (fr) * 1969-03-17 1970-12-04 Ibm

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE524279C (de) * 1929-03-15 1931-05-13 Mueller Hans Gluehelektrode mit einem metallischen Traeger fuer die emittierenden Substanzen
NL80503C (fr) * 1950-03-31
US3312856A (en) * 1963-03-26 1967-04-04 Gen Electric Rhenium supported metallic boride cathode emitters
US3389290A (en) * 1965-04-06 1968-06-18 Sony Corp Electron gun device
GB1045396A (en) * 1965-07-23 1966-10-12 Standard Telephones Cables Ltd Thermionic cathodes
US3436584A (en) * 1966-03-15 1969-04-01 Gen Electric Electron emission source with sharply defined emitting area
DE1283403B (de) * 1966-08-05 1968-11-21 Siemens Ag Mittelbar geheizte Vorratskathode fuer elektrische Entladungsgefaesse
DE1614938A1 (de) * 1966-09-26 1970-12-23 Atomic Energy Authority Uk Elektronen emittierende Kathode,insbesondere fuer Elektronen-Bestrahlungsmaschinen
DE1800945B2 (de) * 1968-10-03 1972-03-30 Siemens AG, 1000 Berlin u. 8000 München Verfahren und elektrodenausgangsmaterial fuer die herstellung einer thorium filmkathode fuer elektrische entladungsgefaesse
NL7207276A (fr) * 1972-05-30 1973-12-04
JPS50151056A (fr) * 1974-05-24 1975-12-04
DE2732960C2 (de) * 1977-07-21 1982-04-01 Philips Patentverwaltung Gmbh, 2000 Hamburg Glühkathode und Verfahren zu ihrer Herstellung
CH617793A5 (fr) * 1977-09-02 1980-06-13 Balzers Hochvakuum
JPS58813B2 (ja) * 1977-09-30 1983-01-08 株式会社日立製作所 電子管陰極及びその製造方法
CH629033A5 (de) * 1978-05-05 1982-03-31 Bbc Brown Boveri & Cie Gluehkathode.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR66913E (fr) * 1953-07-20 1957-10-31 Thomson Houston Comp Francaise Substances à pouvoir émissif élevé
DE1211724B (de) * 1963-06-07 1966-03-03 Telefunken Patent Gepresste Matrixkathode fuer elektrische Entladungsroehren
FR1539067A (fr) * 1966-08-05 1968-09-13 Siemens Ag Cathode à réserve pour tubes à décharge électrique, notamment pour tubes électroniques
FR2033868A5 (fr) * 1969-03-17 1970-12-04 Ibm

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2498372A1 (fr) * 1981-01-16 1982-07-23 Thomson Csf Cathode a chauffage direct, son procede de fabrication, et tube electronique incorporant une telle cathode
EP0056749A2 (fr) * 1981-01-16 1982-07-28 Thomson-Csf Cathode à chauffage direct, et son procédé de fabrication
EP0056749A3 (en) * 1981-01-16 1982-08-25 Thomson-Csf Directly heated cathode and method of making it

Also Published As

Publication number Publication date
FR2445605B1 (fr) 1981-06-12
EP0013201A1 (fr) 1980-07-09
EP0013201B1 (fr) 1982-05-19
DE2962924D1 (en) 1982-07-08
US4429250A (en) 1984-01-31

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