EP0257278B1 - Tube électronique à grille-écran, en particulier tétrode émettrice haute puissance et haute fréquence - Google Patents

Tube électronique à grille-écran, en particulier tétrode émettrice haute puissance et haute fréquence Download PDF

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Publication number
EP0257278B1
EP0257278B1 EP87110165A EP87110165A EP0257278B1 EP 0257278 B1 EP0257278 B1 EP 0257278B1 EP 87110165 A EP87110165 A EP 87110165A EP 87110165 A EP87110165 A EP 87110165A EP 0257278 B1 EP0257278 B1 EP 0257278B1
Authority
EP
European Patent Office
Prior art keywords
connection element
electron tube
lead
tetrode
connection
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 - Lifetime
Application number
EP87110165A
Other languages
German (de)
English (en)
Other versions
EP0257278A1 (fr
Inventor
Rainer Ing. Badenhoop
Ingo Ing. Beling
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP0257278A1 publication Critical patent/EP0257278A1/fr
Application granted granted Critical
Publication of EP0257278B1 publication Critical patent/EP0257278B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J19/00—Details of vacuum tubes of the types covered by group H01J21/00
    • H01J19/28—Non-electron-emitting electrodes; Screens
    • H01J19/38—Control electrodes, e.g. grid
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J19/00—Details of vacuum tubes of the types covered by group H01J21/00
    • H01J19/74—Cooling arrangements

Definitions

  • the invention is in the field of active electrical components and is concerned with the structural design of the air-cooled screen grid connection of an electron tube, the electrodes and associated bushings of which are arranged coaxially.
  • the electrodes are usually insulated from one another by means of hollow cylindrical insulators.
  • Transmitter tubes have also become known whose screen grille connection contains an integrated water cooling coil instead of air cooling (NTG Technical Reports 85, 1983, pages 128 to 132, published by VDE Verlag, Berlin, ISBN 3-8007-1321-7).
  • NVG Technical Reports 85, 1983, pages 128 to 132, published by VDE Verlag, Berlin, ISBN 3-8007-1321-7 NVG Technical Reports 85, 1983, pages 128 to 132, published by VDE Verlag, Berlin, ISBN 3-8007-1321-7.
  • this cooling device makes changing the tubes difficult and time-consuming.
  • the invention has for its object to improve the heat dissipation at the connection of the screen grid electrode by suitable design measures.
  • the screen grid is provided with a second connection element which is spaced apart from the first connection element in the axial direction and the implementation of which divides the insulator arranged between the first connection element and the next electrode into two insulator parts, that the second connection element and the associated bushing consists of a good heat-conducting metal with low RF losses and that the second connection element is also designed as a ring, the part of the bushing running between this ring and the insulator being provided with holes for the passage of cooling air.
  • the power supply for the screen grid is divided into two separate bushings and connection elements.
  • the large RF power is expediently supplied via the heat-conducting connection, while the smaller power for the screen grid control grid suction circuit is dissipated via the usual first connection.
  • the additional screen grille leadthrough the shortest route directly through the insulator, it dissipates most of the heat loss in the immediate vicinity at the point of origin in a direct way into the cooling air flow passing the screen grille connection.
  • the openings provided in the additional screen grille bushing ensure that the cooling air can flow along both on the inside and on the outside of the second connection element. In this way, the permissible temperature of the electron tube can be safely controlled.
  • connection element and the associated bushing are only used for power supply and heat dissipation, they are expediently made of copper.
  • first connection element and the associated bushing essentially serve the mechanical construction and the fastening of the screen grille and the closing of the vacuum envelope; these therefore suitably consist in the usual manner of an iron-cobalt-nickel alloy.
  • Another advantage of the new design of the screen grating connection can be seen in the fact that, due to the arrangement of the second connection element, the system length caused by the electrical wavelength can be kept short regardless of mechanical requirements. Furthermore, a complete separation of the HF currents of the anode shield grid (G2) space and the control grid (Gi) shield grid (G2) space is achieved by the second shield grid connection. Couplings that can occur, for example, on the contact springs of the screen grid connection are thus excluded.
  • the figure shows schematically in detail a transmitter tetrode with a coaxial structure of the electrodes.
  • the connection of the screen grid 5 consists of two axially spaced annular connecting elements (contact rings) 1 and 2.
  • the bushing 3 belonging to the connecting element 1 is provided in the area outside the screen grid / anode insulator with bores which prevent the passage of cooling air 7 allow the inside of the connector 1.
  • the connecting element 1 consists of a metal or an alloy of high thermal capacity, preferably of copper.
  • the associated bushing 3 also consists of a good heat-conducting material, namely one with low RF losses, preferably of copper.
  • the first bushing 4 and the associated connection element 2 consist of a mechanically stable material, the coefficient of thermal expansion of which is adapted to that of the metal-ceramic material which is preferably used as the vacuum envelope 6.
  • An iron-cobalt-nickel alloy is particularly suitable as the material for the leadthrough 4 and the associated connecting element 2 in order to obtain a vacuum-tight metal-ceramic connection of the vacuum envelope 6.
  • the ceramic material serves as an insulation gap between the individual metal-ceramic connections or bushings of the tetrode.
  • the screen grid 5 is fastened to the first bushing 4 by means of a screw 9.

Landscapes

  • Microwave Tubes (AREA)
  • Installation Of Indoor Wiring (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
  • Microwave Amplifiers (AREA)
  • Amplifiers (AREA)

Claims (3)

1. Tube électronique, dans lequel les électrodes et leurs traversées possèdent une structure coaxiale et qui comporte un élément de raccordement de forme annulaire, refroidi par air, pour la grille-écran, les électrodes étant isolées les unes des autres au moyen d'isolateurs cylindriques creux, caractérisé par le fait que la grille-écran comporte un second élément de raccordement (1), qui est distant du premier élément de raccordement (2) dans la direction axiale et dont la traversée (3) subdivise en deux éléments l'isolateur disposé entre le premier élément de raccordement et l'électrode immédiatement suivante, que le second élément de raccordement (1) et la traversée associée (3) sont réalisés en un métal bon conducteur de la chaleur et présentant de faibles pertes en haute fréquence, et que le second élément de raccordement (1) est également réalisé avec une forme annulaire, la partie de la traversée (3) qui s'étend entre cet élément de raccordement et l'isolateur, comportant des trous permettant le passage d'air de refroidissement (7).
2. Tube électronique suivant la revendication 1, caractérisé par le fait que le second élément de raccordement (1) ainsi que la traversée associée (3) sont réalisés en cuivre et que le premier élément de raccordement (2) ainsi que la traversée associée (4) sont réalisés en un alliage de fer-cobalt-nickel.
3. Utilisation d'un tube électronique suivant la revendication 1 ou 2, en tant que tétrode émettrice dans des amplificateurs de puissance de tubes a haute fréquence (cavités résonnantes).
EP87110165A 1986-07-30 1987-07-14 Tube électronique à grille-écran, en particulier tétrode émettrice haute puissance et haute fréquence Expired - Lifetime EP0257278B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863625843 DE3625843A1 (de) 1986-07-30 1986-07-30 Schirmgitterelektronenroehre, insbesondere sendetetrode hoher leistung und hoher frequenzen
DE3625843 1986-07-30

Publications (2)

Publication Number Publication Date
EP0257278A1 EP0257278A1 (fr) 1988-03-02
EP0257278B1 true EP0257278B1 (fr) 1990-05-23

Family

ID=6306351

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87110165A Expired - Lifetime EP0257278B1 (fr) 1986-07-30 1987-07-14 Tube électronique à grille-écran, en particulier tétrode émettrice haute puissance et haute fréquence

Country Status (4)

Country Link
US (1) US4779022A (fr)
EP (1) EP0257278B1 (fr)
JP (1) JPS6337538A (fr)
DE (2) DE3625843A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5315611A (en) * 1986-09-25 1994-05-24 The United States Of America As Represented By The United States Department Of Energy High average power magnetic modulator for metal vapor lasers
FR2649533B1 (fr) * 1989-07-04 1991-09-20 Thomson Tubes Electroniques Tube a grille a sortie sur cavites couplees, avec element de couplage integre au tube
EP0496008B1 (fr) * 1991-01-21 1995-09-13 Thomson Elektronenröhren AG Tube électronique à haute puissance réglable
US5434770A (en) * 1992-11-20 1995-07-18 United States Department Of Energy High voltage power supply with modular series resonant inverters
KR0151261B1 (ko) * 1995-07-14 1998-12-15 문정환 펄스폭 변조 회로
US10491174B1 (en) * 2017-04-25 2019-11-26 Calabazas Creek Research, Inc. Multi-beam power grid tube for high power and high frequency operation

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE162754C (fr) *
DE872609C (de) * 1951-02-06 1953-04-02 Siemens Ag Luftgekuehlte Elektronenroehre
US3227905A (en) * 1961-10-02 1966-01-04 Eitel Mccullough Inc Electron tube comprising beryllium oxide ceramic
US3567982A (en) * 1968-12-23 1971-03-02 Sylvania Electric Prod Electron discharge device anode fin having heat distortion preventive means incorporated therein
US3641380A (en) * 1970-02-24 1972-02-08 Gen Electric Anode electrode for electron discharge device
US4302701A (en) * 1978-07-07 1981-11-24 Siemens Aktiengesellschaft Directly heated cathode for an electron tube with coaxial electrode design
US4295077A (en) * 1980-02-14 1981-10-13 Rca Corporation Circumferentially apertured cylindrical grid for electron tube
FR2564240B1 (fr) * 1984-05-09 1986-09-19 Thomson Csf Tube electronique muni d'un dispositif de refroidissement de l'embase de grille
FR2564239B1 (fr) * 1984-05-09 1986-09-19 Thomson Csf Tube electronique muni d'un dispositif de refroidissement de la cathode

Also Published As

Publication number Publication date
EP0257278A1 (fr) 1988-03-02
DE3625843A1 (de) 1988-02-11
US4779022A (en) 1988-10-18
DE3762935D1 (de) 1990-06-28
JPS6337538A (ja) 1988-02-18

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