EP0156004B1 - Travelling-wave tube and manufacturing method of the same - Google Patents

Travelling-wave tube and manufacturing method of the same Download PDF

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Publication number
EP0156004B1
EP0156004B1 EP84114709A EP84114709A EP0156004B1 EP 0156004 B1 EP0156004 B1 EP 0156004B1 EP 84114709 A EP84114709 A EP 84114709A EP 84114709 A EP84114709 A EP 84114709A EP 0156004 B1 EP0156004 B1 EP 0156004B1
Authority
EP
European Patent Office
Prior art keywords
delay line
wave tube
travelling
outer sheath
tube according
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
Application number
EP84114709A
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German (de)
French (fr)
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EP0156004A1 (en
Inventor
Hinrich Dr. Rer. Nat. Dipl.-Phys Heynisch
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
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Siemens AG
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Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0156004A1 publication Critical patent/EP0156004A1/en
Application granted granted Critical
Publication of EP0156004B1 publication Critical patent/EP0156004B1/en
Expired legal-status Critical Current

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    • 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 invention relates to a traveling wave tube according to the preamble of claim 1.
  • traveling wave tubes according to the preamble of claim 1 with a helical delay line are known for example from US-A-3 670 196.
  • the metal layer arranged on the outer surface serves to solder the delay line to the vacuum envelope.
  • the invention has for its object to provide a traveling wave tube of high power, the delay line is characterized by a large bandwidth and an increased RF field strength within the metal layer on the inner surface of the delay line.
  • the invention has the essential advantage that, by creating a (spiral) double-layer delay line, the inner layer of the delay line is shielded from its outer jacket in such a way that the RF field strength in the interior maintains relatively high values which cannot be reduced by the effect of the metallic outer wall.
  • a high wake-up efficiency is achieved between the electron beam and the electromagnetic wave with the best possible radial heat dissipation.
  • the technology used is relatively easy and inexpensive to control.
  • the figure shows the delay line of the traveling wave tube according to the invention schematically, partly in section and broken.
  • the 1 shows a delay line 1, which is arranged within a solid metallic vacuum envelope 4.
  • the vacuum envelope 4 is preferably made of copper.
  • the delay line 1 has the shape of a spiral.
  • the core 2 of the helix consists of insulator material, preferably of aluminum oxide ceramic.
  • the core 2 is covered on the outer and inner lateral surfaces with a metal layer 3, 3 ', which preferably consists of copper.
  • the inner metal layer 3 takes over the function as a delay line and the outer metal layer 3 ′ serves as a shield against the vacuum envelope 4. This increases an HF field within the inner metal layer 3, i. H. achieved at the location of the electron beam.
  • insulating layers 5 are provided, which preferably consist of aluminum oxide ceramic and ensure radial heat dissipation.
  • the HF coupling or decoupling takes place e.g. B. via a coaxial waveguide 7, the inner conductor 8 is attached to the outside of the coil in this embodiment and forms a galvanic connection to the inner metal layer 3.
  • the inner conductor 8 can also be contacted only with the inner metal layer 3.

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  • Microwave Tubes (AREA)

Description

Die Erfindung betrifft eine Wanderfeldröhre nach dem Oberbegriff des Anspruchs 1.The invention relates to a traveling wave tube according to the preamble of claim 1.

Wanderfeldröhren nach dem Oberbegriff des Patentanspruches 1 mit einer wendelartigen Verzögerungsleitung sind beispielsweise aus der US-A-3 670 196 bekannt. Bei diesen Wanderfeldröhren dient die auf der Außenmantelfläche angeordnete Metallschicht zum Verlöten der Verzögerungsleitung mit der Vakuumhülle.Traveling wave tubes according to the preamble of claim 1 with a helical delay line are known for example from US-A-3 670 196. In these traveling wave tubes, the metal layer arranged on the outer surface serves to solder the delay line to the vacuum envelope.

Es ist auch bereits bekannt, die Vakuumhülle und die Verzögerungsleitung aus Kupfer herzustellen und diese Teile mit den Halterungsstäben aus dielektrischem Material, z. B. aus Berylliumoxid, zu verlöten (DE-A-2 838 515).It is also already known to produce the vacuum envelope and the delay line from copper and these parts with the support rods made of dielectric material, e.g. B. from beryllium oxide, to be soldered (DE-A-2 838 515).

In der US-A-3 519 964 wird u. a. Aluminiumoxid als Isoliermaterial für Verzögerungsleitungen empfohlen.U.S.-A-3,519,964 et al. a. Aluminum oxide recommended as insulation material for delay lines.

Der Erfindung liegt die Aufgabe zugrunde, eine Wanderfeldröhre hoher Leistung zu schaffen, deren Verzögerungsleitung sich durch große Bandbreite und eine erhöhte HF-Feldstärke innerhalb der Metallschicht auf der Innenmantelfläche der Verzögerungsleitung auszeichnet.The invention has for its object to provide a traveling wave tube of high power, the delay line is characterized by a large bandwidth and an increased RF field strength within the metal layer on the inner surface of the delay line.

Diese Aufgabe wird erfindungsgemäß durch durch eine Wanderfeldröhre mit den Merkmalen des Anspruchs 1 gelöst.This object is achieved by a traveling wave tube with the features of claim 1.

Weitere vorteilhafte Ausgestaltungen bzw. Weiterbildungen der Erfindung sind Gegenstand zusätzlicher Ansprüche 2 bis 6.Further advantageous refinements or developments of the invention are the subject of additional claims 2 to 6.

Die Erfindung weist den wesentlichen Vorteil auf, daß man durch die Schaffung einer (wendelartigen) Doppel-schicht-Verzögerungsleitung erreicht, daß die innere Schicht der Verzögerungsleitung gegen deren Außenmantel derart abgeschirmt ist, daß die HF-Feldstärke im Innenraum relativ hohe Werte beibehält, die durch die Wirkung oer metalliscnen Außenwand nicht reduziert werden kann. Es wird ein hoher Weckselwirkungsgrad zwischen Elektronenstrahl und elektromagnetischer Welle erzeilt bei bestmöglicher radialer Wärmeabführung. Die angewandte Technologie ist relativ gut und kostengünstig beherrschbar.The invention has the essential advantage that, by creating a (spiral) double-layer delay line, the inner layer of the delay line is shielded from its outer jacket in such a way that the RF field strength in the interior maintains relatively high values which cannot be reduced by the effect of the metallic outer wall. A high wake-up efficiency is achieved between the electron beam and the electromagnetic wave with the best possible radial heat dissipation. The technology used is relatively easy and inexpensive to control.

Es kann auch zweckmäßig sein, ein Mehrschichtsystem vorzusehen, welches mindestens eine weitere, gegen die bisher genannten isolierte Metällschicht enthält, um den Effekt noch zu erhöhen.It can also be expedient to provide a multilayer system which contains at least one further metal layer which is insulated from the previously mentioned, in order to increase the effect still further.

Die Erfindung wird anhand eines Ausführungsbeispieles weiter erläutert. Teile, die nicht unbedingt zum Verständnis der Erfindung beitragen, sind in der Figur unbezeichnet oder weggelassen.The invention is further explained using an exemplary embodiment. Parts which do not necessarily contribute to an understanding of the invention are not shown in the figure or are omitted.

Die Figur zeigt die Verzögerungsleitung der erfindungsgemäßen Wanderfeldröhre Schematisch, teilweise im Schnitt und gebrochen.The figure shows the delay line of the traveling wave tube according to the invention schematically, partly in section and broken.

In FIG 1 ist eine Verzögerungsleitung 1 dargestellt, die innerhalb einer massiven metallischen Vakuumhülle 4 angeordnet ist. Die Vakuumhülle 4 besteht vorzugsweise aus Kupfer. Die Verzögerungsleitung 1 weist in diesem Ausführungsbeispiel die Gestalt einer Wendel auf. Der Kern 2 der Wendel besteht aus Isolatormaterial, vorzugsweise aus Aluminiumoxidkeramik. Auf den Außen- und Innenmantelflächen ist der Kern 2 mit einer Metallschicht 3, 3' bedeckt, die vorzugsweise aus Kupfer besteht. Die innere Metallschicht 3 übernimmt dabei die Funktion als Verzögerungsleitung und die äußere Metallschicht 3'dient als Abschirmung gegen die Vakuumhülle 4. Damit wird eine HF-Felderhöhung innerhalb der inneren Metallschicht 3, d. h. am Ort des Elektronenstrahls erzielt. Zwischen der Metallschicht 3', welche die Außenmantelfläche der Verzögerungsleitung 1 bildet, und der Vakuumhülle 4 sind Isolierschichten 5 vorgesehen, die vorzugsweise aus Aluminiumoxidkeramik bestehen und für eine radiale Wärmeableitung sorgen. Die HF-Ein- bzw. Auskopplung erfolgt z. B. über einen koaxialen Wellenleiter 7, dessen Innenleiter 8 in diesem Ausführungsbeispiel an die Außenseite der Wendel angebracht ist und eine galvanische Verbindung zur inneren Metallschicht 3 bildet. Der Innenleiter 8 kann jedoch auch nur mit der inneren Metallschicht 3 kontaktiert sein.1 shows a delay line 1, which is arranged within a solid metallic vacuum envelope 4. The vacuum envelope 4 is preferably made of copper. In this exemplary embodiment, the delay line 1 has the shape of a spiral. The core 2 of the helix consists of insulator material, preferably of aluminum oxide ceramic. The core 2 is covered on the outer and inner lateral surfaces with a metal layer 3, 3 ', which preferably consists of copper. The inner metal layer 3 takes over the function as a delay line and the outer metal layer 3 ′ serves as a shield against the vacuum envelope 4. This increases an HF field within the inner metal layer 3, i. H. achieved at the location of the electron beam. Between the metal layer 3 ', which forms the outer surface of the delay line 1, and the vacuum envelope 4, insulating layers 5 are provided, which preferably consist of aluminum oxide ceramic and ensure radial heat dissipation. The HF coupling or decoupling takes place e.g. B. via a coaxial waveguide 7, the inner conductor 8 is attached to the outside of the coil in this embodiment and forms a galvanic connection to the inner metal layer 3. However, the inner conductor 8 can also be contacted only with the inner metal layer 3.

Claims (6)

1. Travelling-wave tube having a delay line arranged between an electron beam generation system and an electron beam collector within a solid metallic vacuum sleeve, which delay line is in the form of a helical or a ringland line, the delay line consisting of a core of insulating material with an inner and an outer sheath surface and of metal layers applied to the inner and the outer sheath surfaces of the core respectively, and the metal layer applied to the outer sheath surface being in good heat- conducting contact to the vacuum sleeve, characterized in that an insulating layer (5) is arranged between the outer sheath surface, enclosing the metal layer (3), of the delay line (1) and the vacuum sleeve (4).
2. Travelling wave tube according to Claim 1, characterized in that, between the vacuum sleeve and the delay line in the insulating layer, at least one further metal layer, insulated against the metal layers (3), is provided and forced by a multi-layer system.
3. Travelling wave tube according to Claim 1 or 2, characterized in that the core (2) consists of aluminium oxide ceramic.
4. Travelling wave tube according to one of Claims 1 to 5, characterized in that the metal layers (3) consist of copper.
5. Travelling wave tube according to Claim 1, characterized in that the insulating layer (5) consists of aluminium oxide ceramic.
6. Method for manufacturing a travelling-wave tube according to one of Claims 1 to 5, characterized in that, as the core (2) of the delay line (1), a tube of insulating material is coated on its inner and outer sheath surface with a metal layer (3) and the contours of the delay line (1) being produced by means of milling or grinding technology, and in that the delay line (1) is subsequently enclosed with an insulating layer (5) and soldered into the metallic vacuum sleeve (4).
EP84114709A 1984-02-28 1984-12-04 Travelling-wave tube and manufacturing method of the same Expired EP0156004B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3407206 1984-02-28
DE19843407206 DE3407206A1 (en) 1984-02-28 1984-02-28 WALKING PIPES AND METHOD FOR THE PRODUCTION THEREOF

Publications (2)

Publication Number Publication Date
EP0156004A1 EP0156004A1 (en) 1985-10-02
EP0156004B1 true EP0156004B1 (en) 1989-03-08

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP84114709A Expired EP0156004B1 (en) 1984-02-28 1984-12-04 Travelling-wave tube and manufacturing method of the same

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US (1) US4647816A (en)
EP (1) EP0156004B1 (en)
DE (2) DE3407206A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4765056A (en) * 1986-04-03 1988-08-23 Raytheon Company Method of manufacture of helical waveguide structure for traveling wave tubes
US5173669A (en) * 1990-09-04 1992-12-22 Hughes Aircraft Company Slow-wave structure having block supported helix structure
US5231330A (en) * 1991-10-25 1993-07-27 Itt Corporation Digital helix for a traveling-wave tube and process for fabrication
US6584675B1 (en) * 2000-06-09 2003-07-01 Sunder S. Rajan Method for fabricating three dimensional traveling wave tube circuit elements using laser lithography

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3519964A (en) * 1968-07-26 1970-07-07 Microwave Ass High power slow wave circuit
DE1937704B2 (en) * 1969-07-24 1972-04-13 Siemens AG, 1000 Berlin u. 8000 München WALKING FIELD TUBE WITH A HELICAL DECELERATION LINE
US3691630A (en) * 1969-12-10 1972-09-19 James E Burgess Method for supporting a slow wave circuit via an array of dielectric posts
US3670196A (en) * 1971-02-24 1972-06-13 Raytheon Co Helix delay line for traveling wave devices
US4115721A (en) * 1977-01-07 1978-09-19 Louis E. Hay Traveling wave device with unific composite metal dielectric helix and method for forming
US4158791A (en) * 1977-02-10 1979-06-19 Varian Associates, Inc. Helix traveling wave tubes with resonant loss
IT1090547B (en) * 1977-10-28 1985-06-26 Elettronica Spa PROGRESSIVE WAVER HELICAL PIPES WITH SELECTIVE AUXILIARY SHIELDING USING CONDUCTIVE ELEMENTS APPLIED ON DIELECTRIC SUPPORTS
FR2420842A1 (en) * 1978-03-24 1979-10-19 Thomson Csf DELAY LINE, FOR HYPERFREQUENCY TUBE, COOLED BY FLUID CIRCULATION AND HYPERFREQUENCY TUBE CONTAINING SUCH A LINE
US4185225A (en) * 1978-03-24 1980-01-22 Northrop Corporation Traveling wave tube
DE2838515C3 (en) * 1978-09-04 1981-11-12 Siemens AG, 1000 Berlin und 8000 München Traveling wave tube
DE2840782C3 (en) * 1978-09-19 1981-12-10 Siemens AG, 1000 Berlin und 8000 München Method of manufacturing a traveling wave tube with a helical delay line
US4229676A (en) * 1979-03-16 1980-10-21 Hughes Aircraft Company Helical slow-wave structure assemblies and fabrication methods
US4422012A (en) * 1981-04-03 1983-12-20 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Ladder supported ring bar circuit
DE3229420A1 (en) * 1982-08-06 1984-02-09 Siemens AG, 1000 Berlin und 8000 München METHOD FOR PRODUCING A HELICAL DELAY PIPE FOR WALKING PIPES

Also Published As

Publication number Publication date
DE3477090D1 (en) 1989-04-13
EP0156004A1 (en) 1985-10-02
DE3407206A1 (en) 1985-08-29
US4647816A (en) 1987-03-03

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