EP0394094A1 - Wanderfeldröhre mit einer Verzögerungsleitung, die eine gelötete Spirale enthält - Google Patents

Wanderfeldröhre mit einer Verzögerungsleitung, die eine gelötete Spirale enthält Download PDF

Info

Publication number
EP0394094A1
EP0394094A1 EP90400972A EP90400972A EP0394094A1 EP 0394094 A1 EP0394094 A1 EP 0394094A1 EP 90400972 A EP90400972 A EP 90400972A EP 90400972 A EP90400972 A EP 90400972A EP 0394094 A1 EP0394094 A1 EP 0394094A1
Authority
EP
European Patent Office
Prior art keywords
metal
propeller
wave tube
brazed
helix
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.)
Withdrawn
Application number
EP90400972A
Other languages
English (en)
French (fr)
Inventor
Noel Thomson Csf Santonja
Dominique Thomson Csf Henry
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 Electron Devices SA
Original Assignee
Thomson Tubes Electroniques
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 Tubes Electroniques filed Critical Thomson Tubes Electroniques
Publication of EP0394094A1 publication Critical patent/EP0394094A1/de
Withdrawn legal-status Critical Current

Links

Images

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
    • H01J23/16—Circuit elements, having distributed capacitance and inductance, structurally associated with the tube and interacting with the discharge
    • H01J23/24—Slow-wave structures, e.g. delay systems
    • H01J23/26—Helical slow-wave structures; Adjustment therefor

Definitions

  • the present invention relates to traveling wave tubes operating at wide band and high average and / or peak powers.
  • a traveling wave tube is formed by the association of a long and fine electron beam and a structure, such as a delay line, intended to guide a microwave wave to be amplified.
  • This delay line is very often produced from a thin metal strip, of substantially rectangular cross section, helically wound by forming non-contiguous turns. A propeller is thus obtained.
  • This helix is held, centered by dielectric rods, in a metal sleeve which constitutes the body of the traveling wave tube.
  • the number of sticks is generally greater than or equal to three.
  • the propeller is produced from a thin strip of substantially rectangular cross section of a metal which is a good conductor of heat and electricity.
  • the propeller is brazed to the rods which themselves are brazed inside the sleeve.
  • the copper propeller is made.
  • a sleeve is also used in copper and sticks in beryllium oxide. Since copper has a low electrical resistivity, the Joule effect losses will be low. Thanks to the high thermal conductivity of copper and the soldering, good heat dissipation is obtained along the propeller and the sleeve.
  • the propeller heating will be minimized and will allow operation at medium and / or high peak powers.
  • Such a construction can be used in wave tubes broadband power progressives.
  • the traveling wave tubes fitted with such a propeller are therefore limited in peak power.
  • the present invention aims to remedy these drawbacks by proposing a traveling wave tube comprising a brazed helical delay line, capable of operating at medium and / or high peak powers. For this we sought to eliminate the peak effects.
  • the present invention provides a traveling wave tube comprising a helical delay line mounted in a metal sleeve and kept centered by at least three dielectric rods, the helix having parts of its outer surface brazed on the rods, characterized in that , in order to eliminate the peak effect between two solders opposite one another on a stick, the propeller is produced from a metal strip whose cross section has substantially the shape of a T, at least at level of all parts of the propeller brazed on the sticks, the foot of the T being brazed on the sticks.
  • the propeller can either be made entirely from a metal that is a good conductor of heat and electricity, or be made up of two layers of metal stacked one on top of the other. In the latter case, a metal that is a good conductor of heat and electricity will be used to make the brazed layer on the sticks.
  • the brazed layer on the sticks will either be continuous or discontinuous.
  • the layer of metal located towards the inside of the propeller will be either in a refractory metal or in a metal which is a good conductor of heat and electricity.
  • the two layers will be assembled by brazing or any other known means.
  • Figure 1 shows a helical delay line of a traveling wave tube.
  • This helical delay line bears the reference 1.
  • This helix 1 comprises a plurality of non-contiguous turns 2.
  • the propeller 1 is mounted in a metal sleeve 3. It is centered in the sleeve 3 by dielectric rods 4. Their number is greater than or equal to three.
  • the propeller 1 has parts 8 of its outer surface in contact with the rods 4.
  • the propeller 1 is produced from a thin strip of a metal which is a good conductor of heat and electricity such as copper . This thin strip has a substantially rectangular section.
  • the propeller 1 is integral with the rods 4 by solderings 5, located at the level of the parts 8 in contact with the rods 4.
  • the rods 4 are themselves secured to the sleeve 3 by brazing 6.
  • the materials used for the propeller 1, the rods 4 and the sleeve 3 must be able to withstand the deformations which may occur during brazing . This leads to choosing, preferably copper for the sleeve 3 and beryllium oxide for the sticks 4.
  • the reference 20 represents the propeller and the reference 21 a turn of the propeller 20. Two consecutive turns 21 are not contiguous.
  • This propeller 20 is mounted in a metal sleeve 22. It is centered in this sleeve 22 by dielectric rods 23, the number of which is greater than or equal to three.
  • the propeller 20 has parts 29 of its outer surface in contact with the rods 23.
  • the propeller 20 is secured to the rods 23 by brazings 24 at the parts 29.
  • the rods 23 are themselves secured to the sleeve 22 by other solders 25.
  • the propeller 20 is made from a thin strip of metal which is a good conductor of heat and electricity.
  • the cross section of this thin strip instead of being substantially rectangular has substantially the shape of a T over its entire length.
  • the foot 28 of the T is in contact with the dielectric rods while the transverse bar 27 of the T is placed towards the inside of the propeller 20.
  • the leaves 26 are in contact with the foot 28 of the T, its transverse bar 27 and also the rods 23.
  • the transverse bar 27 of the T serves as an electrical screen and makes it possible to eliminate the peak effect.
  • Two leaves 26 located opposite, on two consecutive turns 21 will be more distant from each other than in the conventional construction of FIG. 1. The risk of electric arcs is considerably reduced.
  • the sleeve 22 is preferably made of a metal which is a good conductor of heat and electricity, such as copper.
  • the dielectric rods 23 will, for example, be made of beryllium oxide so as to withstand the brazing well.
  • the thin strip has a T-shaped cross section only at all the parts 29 of the propeller 20 in contact with the rods 23.
  • This variant is shown in FIG. 4.
  • the thin strip shown in section longitudinal has not yet been wound.
  • the thin strip consists of a succession of first sections 40 whose cross section is T-shaped, separated from each other by second sections 41 whose cross section is substantially rectangular.
  • the second sections 41 may have a cross section corresponding to that of the crossbar of the T.
  • the propeller is made from a strip of metal, a good conductor of heat and electricity, the cross section of the metal strip being T-shaped at least in the parts of the outer surface of the propeller in contact with the rods.
  • This strip is obtained by conventional drawing and / or machining methods.
  • Figure 3 shows in longitudinal section a another variant of a helical delay line of a traveling wave tube according to the invention.
  • the reference 30 represents the propeller, the reference 31 is a turn.
  • the propeller 30 is held centered by rods 33 in a sleeve 32. It has parts 39 of its outer surface in contact with the rods 33.
  • the propeller 30 is integral with the rods 33 by solderings 34. There are fillets 36 of brazing at the interface between the propeller 30 and the rods 33.
  • the propeller 30 is produced from a thin metal strip whose cross section is T-shaped, at least at the parts 39 in contact with sticks 33.
  • the metal strip used to make the propeller 30 consists of an assembly of a first layer 37 and a second layer 38 stacked. They are preferably brazed together by means of a brazing alloy. These two layers 37,38 do not have the same width.
  • the second layer 38 which is located towards the outside of the propeller 30 is narrower than the first layer 37 located towards the inside, so as to obtain the T.
  • the second layer 38 forms the foot of the T while the first layer 37 forms its crossbar.
  • the first layer 37 which faces the inside of the propeller 30 may also be made of a metal which is a good conductor of heat and electricity, such as copper or aluminum.
  • a metal which is a good conductor of heat and electricity such as copper or aluminum.
  • the cross section of the strip used to make the propeller will only have rounded angles as is customary when working at high power levels.
  • copper will be chosen to make the sleeve 32 and beryllium oxide to make the dielectric rods 33.
  • the thin strip can be produced from a first layer 37 and a second layer 38 stacked on top of each other.
  • the second layer 38 located towards the outside of the propeller will be narrower than the first layer 37. It will be in contact with the rods 33, it will be discontinuous, it will be deposited at the level of all the parts 39 of the propeller in contact with the rods 33. It can form the base of the T.
  • the first layer 37 located towards the inside of the propeller, will be continuous. It can form, at the parts 39 of the propeller in contact with the rods 33, the transverse bar of the T.
  • the invention is not limited to the examples described in particular as regards the dimensions and materials of the propeller.

Landscapes

  • Microwave Tubes (AREA)
EP90400972A 1989-04-21 1990-04-10 Wanderfeldröhre mit einer Verzögerungsleitung, die eine gelötete Spirale enthält Withdrawn EP0394094A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8905321A FR2646285A1 (fr) 1989-04-21 1989-04-21 Tube a ondes progressives muni d'une ligne a retard a helice brasee
FR8905321 1989-04-21

Publications (1)

Publication Number Publication Date
EP0394094A1 true EP0394094A1 (de) 1990-10-24

Family

ID=9380989

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90400972A Withdrawn EP0394094A1 (de) 1989-04-21 1990-04-10 Wanderfeldröhre mit einer Verzögerungsleitung, die eine gelötete Spirale enthält

Country Status (4)

Country Link
US (1) US5132591A (de)
EP (1) EP0394094A1 (de)
JP (1) JPH02301938A (de)
FR (1) FR2646285A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111081509A (zh) * 2019-12-16 2020-04-28 中国电子科技集团公司第十二研究所 一种矩形折叠波导慢波结构

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2758888B1 (fr) * 1997-01-27 1999-04-23 Thomson Csf Procede de modelisation fine du fouillis de sol recu par un radar
FR2787918B1 (fr) 1998-12-23 2001-03-16 Thomson Tubes Electroniques Tube a ondes progressives multibande de longueur reduite capable de fonctionner a puissance elevee
RU2211501C2 (ru) * 2001-10-15 2003-08-27 Открытое акционерное общество "Корпорация "Фазотрон-Научно-исследовательский институт радиостроения" Сверхвысокочастотный прибор с замедляющей системой "клеверный лист"
CN102560404B (zh) * 2010-12-24 2013-11-06 北京有色金属研究总院 一种行波管用螺旋线低电阻率复合涂层的制备方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4185225A (en) * 1978-03-24 1980-01-22 Northrop Corporation Traveling wave tube
EP0129314A2 (de) * 1983-06-17 1984-12-27 Stc Plc Verbindung von Metall mit Keramik

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2889487A (en) * 1954-09-15 1959-06-02 Hughes Aircraft Co Traveling-wave tube
IT1090547B (it) * 1977-10-28 1985-06-26 Elettronica Spa Tubi ad onda progressiva ad elica con schermaggio ausiliario selettivo mediante elementi conduttori applicati su supporti dielettrici
FR2445014A1 (fr) * 1978-12-22 1980-07-18 Thomson Csf Ligne a retard hyperfrequence et tube a onde progressive comportant une telle ligne
US4481444A (en) * 1981-03-23 1984-11-06 Litton Systems, Inc. Traveling wave tubes having backward wave suppressor devices

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4185225A (en) * 1978-03-24 1980-01-22 Northrop Corporation Traveling wave tube
EP0129314A2 (de) * 1983-06-17 1984-12-27 Stc Plc Verbindung von Metall mit Keramik

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
I.E.D.M., San Francisco, CA, 13-15 décembre 1982 pages 18-21, IEEE, New York, US; R.M. PHILLIPS: "Some surprising helical interaction circuits... *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111081509A (zh) * 2019-12-16 2020-04-28 中国电子科技集团公司第十二研究所 一种矩形折叠波导慢波结构
CN111081509B (zh) * 2019-12-16 2021-08-06 中国电子科技集团公司第十二研究所 一种矩形折叠波导慢波结构

Also Published As

Publication number Publication date
JPH02301938A (ja) 1990-12-14
FR2646285A1 (fr) 1990-10-26
US5132591A (en) 1992-07-21

Similar Documents

Publication Publication Date Title
EP0283414A2 (de) Sicherung mit Umhüllung aus fester Keramik hoher Dichte und Herstellungsverfahren dieser Sicherung
FR3107635A1 (fr) Dispositif de chauffage d’un produit par induction a flux transverse
EP0394094A1 (de) Wanderfeldröhre mit einer Verzögerungsleitung, die eine gelötete Spirale enthält
EP0402549A1 (de) Lauffeldröhre mit wendelförmiger Verzögerungsleitung, welche mittels dielektrischer Halterungsstäbe aus Bornitrid an der Vakuumhülle befestigt ist
FR2543734A1 (fr) Tube a onde progressive comportant un fourreau creuse de gorges et procede de fabrication
EP0102288B1 (de) Wanderfeldröhre mit Mitteln zur Dämpfung parasitärer Schwingungen
EP0020262B1 (de) Isolierte Kollektoreinheit für Leistungsröhren und Röhre mit einem solchen Kollektor
EP0004492B1 (de) Mikrowellenröhre mit einer durch Fluidumströmung gekühlten Verzögerungsleitung
EP0088663B1 (de) Fokussierungssolenoid, Anwendung und Herstellungsverfahren desselben
EP0022016B1 (de) Verzögerungsleitung mit veränderlicher Steghöhe für eine Wanderfeldröhre und Wanderfeldröhre mit einer solchen Verzögerungsleitung
EP0687047A1 (de) Diodenlaserbarstapel und Montierungsverfahren
EP0048690B1 (de) Hochstabilisierte Gasentladungsröhre für Laserstrahlung mit hoher Leistung
FR2958807A1 (fr) Dispositif de connexion de deux cables supraconducteurs
FR2471042A1 (fr) Tube a ondes progressives du type a helice et a large bande passante
EP0394095A1 (de) Wanderfeldröhre mit einer Verzögerungsleitung, die eine bimetallische Spirale enthält
EP0274950A1 (de) Breitbandige Kopplungsvorrichtung zwischen der Verzögerungsleitung einer Wanderfeldröhre und der energieübertragenden Aussenschaltung und Wanderfeldröhre mit einer solchen Vorrichtung
EP0221921B1 (de) Eisenloser elektromagnet
FR2548856A1 (fr) Dispositif de fusion par induction directe en cage froide segmentee
EP0540384A1 (de) Kühlvorrichtung für eine Mikrowellenröhre
EP1055246A1 (de) Gitter für elektronenröhre mit axialem strahlenbündel
FR2485801A1 (fr) Dispositif de couplage entre la ligne a retard d'un tube a onde progressive et le circuit externe de transmission de l'energie du tube, et tube a onde progressive comportant un tel dispositif
CA2179654A1 (fr) Torche a plasma a bobine electromagnetique de deplacement du pied d'arc independante et integree
FR2741997A1 (fr) Structure de cathode pour tube a rayons cathodiques
FR2683941A1 (fr) Collecteur de faisceau d'electrons.
EP0462863A1 (de) Wanderfeldröhre mit einer Kopplungsvorrichtung zwischen ihrer Verzögerungsleitung und einer aussen gelegenen Mikrowellenschaltung

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT

17P Request for examination filed

Effective date: 19901108

17Q First examination report despatched

Effective date: 19921202

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19930414