EP0009431A1 - Kapazitive Kopplungsvorrichtung für Elektronenröhre und eine, eine solche Vorrichtung enthaltende Elektronenröhre - Google Patents

Kapazitive Kopplungsvorrichtung für Elektronenröhre und eine, eine solche Vorrichtung enthaltende Elektronenröhre Download PDF

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Publication number
EP0009431A1
EP0009431A1 EP79400611A EP79400611A EP0009431A1 EP 0009431 A1 EP0009431 A1 EP 0009431A1 EP 79400611 A EP79400611 A EP 79400611A EP 79400611 A EP79400611 A EP 79400611A EP 0009431 A1 EP0009431 A1 EP 0009431A1
Authority
EP
European Patent Office
Prior art keywords
tube
coupling electrode
coupling
electrode
electronic
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
EP79400611A
Other languages
English (en)
French (fr)
Other versions
EP0009431B1 (de
Inventor
Michel Benoit
Pierre Gerlach
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
Thomson CSF Scpi
Original Assignee
Thomson CSF Scpi
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 Scpi, Thomson CSF SA filed Critical Thomson CSF Scpi
Publication of EP0009431A1 publication Critical patent/EP0009431A1/de
Application granted granted Critical
Publication of EP0009431B1 publication Critical patent/EP0009431B1/de
Expired 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
    • H01J19/78—One or more circuit elements structurally associated with the tube

Definitions

  • the present invention relates to a capacitive coupling device for an electronic tube. It also relates to electronic tubes comprising such a device.
  • the device according to the invention applies essentially to coaxial geometry tubes, such as power triodes and tetrodes used by radio and television transmitters, radars, industrial high frequency generators.
  • the invention can however also be applied to other types of tubes, such as planar triodes.
  • a capacitive coupling is thus established between the upper cap of a grid of the tube, this cap being the closest to the coupling electrode, and this coupling electrode.
  • means make it possible to make the distance, and therefore the coupling capacity, variable between the coupling electrode and the upper cap of a grid of the tube.
  • the means isolating the coupling electrode from the anode of the tube are located in an area which is not in direct view of the area of the tube subjected to electronic bombardment.
  • FIGS. 1 and 2 the electronic tube 1, chosen by way of example of coaxial geometry, is shown seen in a direction parallel to its axis 00 '.
  • a snatch on these views shows two embodiments of the capacitive coupling device according to the invention.
  • the coupling electrode 2 is located inside the vacuum enclosure of the electronic tube where it constitutes the bottom of the tube. It is made up of a metallic mass, which can be made of copper. Means 3 isolate this coupling electrode 2 from the anode 10 of the tube. These means can be constituted by a ceramic or glass insulator, similar to those which are commonly used to insulate the connections of electronic tubes. Means 4 and 5 respectively provide the connection between the insulating means 3 and the coupling electrode 2 and between the insulating means 3 and the anode 10 of the tube.
  • the coupling electrode 2 and the anode 10 are generally made of copper and connection means are required between these elements and the insulating means 3, to avoid ruptures due to differences in dilata tion between copper and insulator.
  • the connection means 4 and 5 may consist of two collars made of Fe Ni Co alloy. The connection means also serve as connections for connecting the device to one or more external circuits.
  • a capacitive coupling is thus established, under vacuum, between the upper cap 9 of a grid of the tube, this cap being the closest to the coupling electrode and this coupling electrode.
  • the grid of the tube whose upper cap is closest to the coupling electrode is the screen grid in the case of a tetrode, the grid in the case of a triode.
  • a substantially flat capacitor which has all the advantages of vacuum capacitors and which is directly integrated into the tube itself, is thus formed.
  • the insulator 3 is of cylindrical shape and is located in an area which is not in direct view of the area of the tube subjected to electronic bombardment.
  • the electron beam in a coaxial geometry tube is ra - dial. It is understood that the invention also applies to cases where the insulator 3 is substantially planar and projects beyond the anode 10.
  • Means for cooling the coupling electrode 2 are generally provided. These means are generally the same as those used to cool the anode 10 of the tube.
  • the coupling electrode can be cooled by air, in this case it is capped with an air radiator, or by circulation of fluid, of water generally, as is shown diagrammatically in FIG. 1 and identified by 6. Solutions mixed, air and fluid at the same time, may be suitable for certain particular cases.
  • FIG. 2 shows an embodiment of the coupling device according to the invention or means 7 make it possible to make this distance variable and therefore the coupling capacity.
  • These means can be constituted by a deformable metal bellows 7, similar to the bellows used in variable vacuum capacitor technology, this bellows 7 connecting the coupling electrode 2 to the connection means 4 between this electrode and the insulating means 3.
  • means 8, represented symbolically in FIG. 2, allow the coupling electrode 2 to be movable in translation and immobile in rotation.

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  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
  • Amplifiers (AREA)
  • Measuring Fluid Pressure (AREA)
EP79400611A 1978-09-22 1979-09-04 Kapazitive Kopplungsvorrichtung für Elektronenröhre und eine, eine solche Vorrichtung enthaltende Elektronenröhre Expired EP0009431B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7827254A FR2437061A1 (fr) 1978-09-22 1978-09-22 Dispositif de couplage capacitif pour tube electronique et tube electronique comportant un tel dispositif
FR7827254 1978-09-22

Publications (2)

Publication Number Publication Date
EP0009431A1 true EP0009431A1 (de) 1980-04-02
EP0009431B1 EP0009431B1 (de) 1981-11-25

Family

ID=9212942

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79400611A Expired EP0009431B1 (de) 1978-09-22 1979-09-04 Kapazitive Kopplungsvorrichtung für Elektronenröhre und eine, eine solche Vorrichtung enthaltende Elektronenröhre

Country Status (4)

Country Link
US (1) US4302705A (de)
EP (1) EP0009431B1 (de)
DE (1) DE2961453D1 (de)
FR (1) FR2437061A1 (de)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1456396A (fr) * 1964-12-07 1966-10-21 English Electric Valve Co Ltd Tubes amplificateurs d'ondes progressives
NL6716812A (de) * 1966-12-13 1968-06-14
FR2053468A5 (de) * 1969-07-04 1971-04-16 Varian Associates
NL7114726A (de) * 1971-01-14 1972-07-18
US3733567A (en) * 1971-04-13 1973-05-15 Secr Aviation Coaxial cavity resonator with separate controls for frequency tuning and for temperature coefficient of resonant frequency adjustment
NL7707980A (nl) * 1976-07-19 1978-01-23 Siemens Ag Inrichting voor het dempen van storende golven in trilholten in een elektronenbuis voor hoge frequenties.

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2619597A (en) * 1945-12-18 1952-11-25 Lawrence L Mlynczak High-frequency oscillator
US2643302A (en) * 1950-03-31 1953-06-23 Int Standard Electric Corp Electron discharge device and circuits for neutralized coaxial line amplifiers
US2895076A (en) * 1957-06-20 1959-07-14 Arthur C Stocker High frequency electron discharge device
US3153765A (en) * 1962-10-04 1964-10-20 Tommy S Weaver Direct coupled coaxial line amplifier
US3488555A (en) * 1966-04-28 1970-01-06 Karl Fritz Resonance chamber structure including vacuum tube electrode components

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1456396A (fr) * 1964-12-07 1966-10-21 English Electric Valve Co Ltd Tubes amplificateurs d'ondes progressives
NL6716812A (de) * 1966-12-13 1968-06-14
FR1549687A (de) * 1966-12-13 1968-12-13
GB1175114A (en) * 1966-12-13 1969-12-23 Sperry Rand Corp Resonant Cavity
DE1541992A1 (de) * 1966-12-13 1970-12-23 Sperry Rand Corp Hohlraumresonator
FR2053468A5 (de) * 1969-07-04 1971-04-16 Varian Associates
NL7114726A (de) * 1971-01-14 1972-07-18
DE2101621A1 (de) * 1971-01-14 1972-07-27 Siemens Ag Senderöhre mit erweiterter Röhrenteilkapazität Anode-Kathode
FR2121807A1 (de) * 1971-01-14 1972-08-25 Siemens Ag
US3733567A (en) * 1971-04-13 1973-05-15 Secr Aviation Coaxial cavity resonator with separate controls for frequency tuning and for temperature coefficient of resonant frequency adjustment
NL7707980A (nl) * 1976-07-19 1978-01-23 Siemens Ag Inrichting voor het dempen van storende golven in trilholten in een elektronenbuis voor hoge frequenties.
DE2632404A1 (de) * 1976-07-19 1978-01-26 Siemens Ag Einrichtung zur daempfung von hohlraum- stoerwellen in einer hochfrequenz-elektronenroehre
FR2359503A1 (fr) * 1976-07-19 1978-02-17 Siemens Ag Dispositif pour affaiblir des ondes parasites de cavite dans un tube electronique a haute frequence

Also Published As

Publication number Publication date
EP0009431B1 (de) 1981-11-25
FR2437061A1 (fr) 1980-04-18
DE2961453D1 (en) 1982-01-28
US4302705A (en) 1981-11-24
FR2437061B1 (de) 1981-02-27

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