US2903657A - Wave conductor, particularly for travelling wave tubes - Google Patents

Wave conductor, particularly for travelling wave tubes Download PDF

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Publication number
US2903657A
US2903657A US472095A US47209554A US2903657A US 2903657 A US2903657 A US 2903657A US 472095 A US472095 A US 472095A US 47209554 A US47209554 A US 47209554A US 2903657 A US2903657 A US 2903657A
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US
United States
Prior art keywords
wave
conductor
damping
tubes
coating
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
US472095A
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English (en)
Inventor
Eichin Werner
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 and Halske AG
Siemens Corp
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Siemens Corp
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Filing date
Publication date
Application filed by Siemens Corp filed Critical Siemens Corp
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Publication of US2903657A publication Critical patent/US2903657A/en
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
    • 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
    • H01J23/30—Damping arrangements associated with slow-wave structures, e.g. for suppression of unwanted oscillations
    • 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 damping means may be either localized or distributed.
  • a damping substance such as graphite, carbon or metal
  • the supports for the retarding conductor usually being helical in shape.
  • the helix is supported on rods of quartz, ceramic, glass or other suitable insulating material, or is inserted directly in tubes of such insulating material having circular or profiled cross-section.
  • a damping layer generally is applied directly to the supporting elements.
  • the present invention provides an arrangement whereby the damping layer, instead of directly engaging the helix, is arranged at a predetermined or well-defined spacing therefrom.
  • This spacing preferably may be made as small as possible since the degree of damping per unit of length decreases as the spacing is increased.
  • the present invention provides upon the damping substances a non-conductive or poorly con ductive coating, at least at the points engaging the wave conductor.
  • the properties of a material suitable for this purpose preferably include that the coating adhere firmly and that it is relatively hard in order not to be injured by the helix itself. A further consideration is that the dielectric losses should be as small as possible.
  • the coating preferably should be as homogeneous as possible and very thin, and uniformly distributed over the entire length involved. 7
  • This coating may, for example, be produced on the supporting elements, after the latter have been provided with the damping material, by such known expedients as vapor precipitation, cathodic atomization or the like in a vacuum.
  • This thickness of the coating may, for example, be from 0.1 to 1 micron.
  • Fig. l is a partially sectioned longitudinal view of one embodiment of the invention as applied to a rod-shaped supporting element with an adjacent helical retarding con ductor;
  • Fig. 2 is a transverse section through a modification of the embodiment shown in Fig. 1;
  • Fig. 3 is a similar section through a further variant of the present invention.
  • Fig. 4 is a similar transverse section corresponding to the embodiment shown in Fig. 1.
  • Fig. 1 illustrates a supporting element 1 in the form of a quartz or ceramic rod with which a helically wound retarding conductor 4 is adapted to cooperate.
  • the outside of the supporting element 1 facing the convex side of the wave conductor 4, is provided with damping means in the form of a thin layer 2 of graphite, carbon or metal.
  • This layer is provided with a thin quartz coating 3, at least at those points with which the wave conductor 4 is in engagement.
  • Fig. 2 shows an embodiment of the invention, in which the quartz coating 3 may cover the entire circumference of the supporting element 1.
  • the quartz coating extends only over a limited arcuate zone adjacent the points of contact with the helix 4.
  • the damping material is applied to only a portion of the supporting element, with the result, that the damping material may be completely covered by the quartz coating even though the latter is applied to one side only of the element 1.
  • This is desirable, as the expedient of completely enclosing the damping layer in a quartz envelope affords the advantage of permitting the use of damping materials which, in the absence of the protective quartz sheathing, might not be suited for use in a vacuum for purposes of this nature.
  • a device for supporting said helical conductor comprising a rodlike member extending in parallel with the axis of said helical conductor on the outside of the turns thereof, a layer of damping material carried by said rodlike member at points facing the turns of said helical conductor, and a relatively very thin coating of relatively hard substantially non-elastic and substantially non-conductive material having relatively very low dielectric losses, disposed upon said damping material and extending between the latter and adjacent portions of the turns of said helical conductor in direct 4% ing forms an outer sheathing for part of said damping material.

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  • Microwave Tubes (AREA)
US472095A 1953-12-10 1954-11-30 Wave conductor, particularly for travelling wave tubes Expired - Lifetime US2903657A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES36695A DE1035798B (de) 1953-12-10 1953-12-10 Im Vakuum betriebener Wellenleiter

Publications (1)

Publication Number Publication Date
US2903657A true US2903657A (en) 1959-09-08

Family

ID=7482308

Family Applications (1)

Application Number Title Priority Date Filing Date
US472095A Expired - Lifetime US2903657A (en) 1953-12-10 1954-11-30 Wave conductor, particularly for travelling wave tubes

Country Status (6)

Country Link
US (1) US2903657A (enrdf_load_stackoverflow)
CH (1) CH326748A (enrdf_load_stackoverflow)
DE (1) DE1035798B (enrdf_load_stackoverflow)
FR (1) FR1114763A (enrdf_load_stackoverflow)
GB (1) GB762565A (enrdf_load_stackoverflow)
NL (2) NL191980A (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3201720A (en) * 1960-02-11 1965-08-17 Itt Slow wave filter helix structure
US3201849A (en) * 1959-11-03 1965-08-24 Bell Telephone Labor Inc Method of winding helices
US3466494A (en) * 1968-05-01 1969-09-09 Siemens Ag Traveling wave tube with delay line supports having a lossy layer and an insulation layer
US5038076A (en) * 1989-05-04 1991-08-06 Raytheon Company Slow wave delay line structure having support rods coated by a dielectric material to prevent rod charging
US5274304A (en) * 1991-04-01 1993-12-28 Nec Corporation Helix type traveling wave tube structure with supporting rods covered with boron nitride or artificial diamond

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3343291C2 (de) * 1983-11-30 1996-05-30 Licentia Gmbh Wanderfeldröhre und Verfahren zu deren Herstellung
JPH0589788A (ja) * 1991-09-27 1993-04-09 Nec Corp 進行波管用誘電体支柱
FR2883409B1 (fr) * 2005-03-18 2007-04-27 Thales Sa Procede de fabrication d'un top avec effet de charge reduit

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2413609A (en) * 1945-03-12 1946-12-31 Hazeltine Research Inc Time-delay network
US2527619A (en) * 1946-08-01 1950-10-31 Bell Telephone Labor Inc Electrical resonator and mode suppressor therefor
US2611101A (en) * 1947-04-15 1952-09-16 Wallauschek Richard Traeling wave amplifier tube
US2669674A (en) * 1948-09-09 1954-02-16 Hartford Nat Bank & Trust Co Traveling wave tube
US2742588A (en) * 1950-01-07 1956-04-17 Bell Telephone Labor Inc Electronic amplifier

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2626371A (en) * 1948-07-16 1953-01-20 Philco Corp Traveling wave tube attenuator
FR997494A (fr) * 1949-09-15 1952-01-07 Csf Perfectionnements aux tubes à décharge électronique à ondes progressives munis d'une atténuation localisée
DE893695C (de) * 1951-04-09 1953-10-19 Siemens Ag Elektronenroehre fuer sehr kurze Wellen
DE898190C (de) * 1951-04-22 1953-11-30 Siemens Ag Elektronenroehre fuer sehr kurze Wellen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2413609A (en) * 1945-03-12 1946-12-31 Hazeltine Research Inc Time-delay network
US2527619A (en) * 1946-08-01 1950-10-31 Bell Telephone Labor Inc Electrical resonator and mode suppressor therefor
US2611101A (en) * 1947-04-15 1952-09-16 Wallauschek Richard Traeling wave amplifier tube
US2669674A (en) * 1948-09-09 1954-02-16 Hartford Nat Bank & Trust Co Traveling wave tube
US2742588A (en) * 1950-01-07 1956-04-17 Bell Telephone Labor Inc Electronic amplifier

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3201849A (en) * 1959-11-03 1965-08-24 Bell Telephone Labor Inc Method of winding helices
US3201720A (en) * 1960-02-11 1965-08-17 Itt Slow wave filter helix structure
US3466494A (en) * 1968-05-01 1969-09-09 Siemens Ag Traveling wave tube with delay line supports having a lossy layer and an insulation layer
US5038076A (en) * 1989-05-04 1991-08-06 Raytheon Company Slow wave delay line structure having support rods coated by a dielectric material to prevent rod charging
US5274304A (en) * 1991-04-01 1993-12-28 Nec Corporation Helix type traveling wave tube structure with supporting rods covered with boron nitride or artificial diamond

Also Published As

Publication number Publication date
CH326748A (de) 1957-12-31
NL92638C (enrdf_load_stackoverflow)
DE1035798B (de) 1958-08-07
GB762565A (en) 1956-11-28
FR1114763A (fr) 1956-04-17
NL191980A (enrdf_load_stackoverflow)

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