US2757310A - Travelling wave tube - Google Patents

Travelling wave tube Download PDF

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Publication number
US2757310A
US2757310A US328582A US32858252A US2757310A US 2757310 A US2757310 A US 2757310A US 328582 A US328582 A US 328582A US 32858252 A US32858252 A US 32858252A US 2757310 A US2757310 A US 2757310A
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US
United States
Prior art keywords
helical
conductor
helix
strip
wave tube
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
US328582A
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English (en)
Inventor
Robinson Norman Wright
Turpie Alexander
Hutchinson Harold
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.)
HARTFORD NAT BANK AND TURST CO
HARTFORD NATIONAL BANK AND TURST Co
Original Assignee
HARTFORD NAT BANK AND TURST CO
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 HARTFORD NAT BANK AND TURST CO filed Critical HARTFORD NAT BANK AND TURST CO
Application granted granted Critical
Publication of US2757310A publication Critical patent/US2757310A/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
    • H01J23/26—Helical slow-wave structures; Adjustment therefor

Definitions

  • the invention relates to. a travelling-wave: tube comprising a conductive electric wave-retarding helix, which is supported by one or more elongated stay members, which: engage the. helix at a small number of'p'oin'ts. at each turn.
  • a known construction has a number of insulating rods, whichv are regularly distributed about the circumference of the helix" andare fixed inposition. relatively to one another.
  • A- further construction has a tube of glass, quartzor ceramic material, having a' polygonal sectional area.
  • the known constructions have the advantage that the quantity of insulating material in'the field of the helix, havingia comparatively high. dielectric constant is at a minimum, so that aminimum.fielddistortion iszen'sured.
  • a travelling-wave tube comprising a helical conductor, supported by an insulating support engaging the helix only at a small number of points at each turn, comprises a stay member, of which the points of contact with the turns of the helix are themselves located on a helical line.
  • the construction in accordance with the invention permits of minimizing the quantity of insulating material in the field of the helix.
  • the stay member may be constituted by an elongated, flat strip which is wound helically about its centre line or about one of the short sides. Two contact points or one contact point are then obtained respectively on each turn.
  • the strip may be made of ceramic material and be wound during the spraying operation. If the helical conductor is comparatively long, be provided with a stiffening part, which is also made of insulating material, i. e. a cylinder if the conductive helix is supported on the outer side and a rod, if the helix is supported on the inner side.
  • Figs. 1 and 2 relate to a travelling-wave tube comprising an internally supported helix, intended for connection to hollow wave guides,
  • Fig 3 relates to a tube intended axial cables and Figs. 4 to 9 relate to an internal support consisting of a flat wound strip.
  • the wave tube is designated by 1, the
  • the first anode 4 is constituted by a perforateddisc and has: two inward pi 'ojectingextensions' 5 to support the conductivecylinder 6; this hollow cylinder is also supported by a. supporting disc 7:
  • The-:current is supplied to theelectrodes through anpluralityof. pins taken through the bottom 8': and of which one, designated. by 9, intended for the electrode 3is shown.
  • provision is made of a conductive hollow'cylinder.'10, .two-stay rings 11 and 12, which are.
  • the discs 4-and11 arelprovidediwith' cylindrical flanges, having a length of a quarter wave of the oscillations to be produced or amplified by the tube.
  • the fcylinders6' and 10" have an internal'supportiug helix of insulating material16, in this case glass:
  • the weld between the cylindersrdandlfl and the helix are located inside these cylinders.
  • Reference numeral 19 designated the electron path (shown in' broken lines)
  • Theitube shown in Fig. 3 corresponds substantially to thatishownin'Figa 1, so'that corresponding'parts are'de signatedi' by the same reference'numerals. In' this case the cylinders: 6 and'lli' are sealedin the tube wall; so that they need'inoti belsupported.” Therefore the anode discLZl). has: no extensions.
  • Reference numeral 22 desigrates? the: insulation. of the: anode supply wire fromthe focusing electrode 3. At 23 is indicated how the pitch of the helix increases gradually towards the ends and terminates in the conductor 24, which forms the input cable and the output cable together with the cylinders 6 and 10 respectively.
  • Figs. 4, 5 and 6 show a conductive helix 30, which is supported by a flat ceramic strip 31.
  • Figs. 5 and 6 are cross sections taken at the points B and C of Fig. 4.
  • Figs. 7, 8 and 9 differ only so far from the three preceding figures that the ceramic strip 32 has a double width.
  • the glass helix of the tubes of Figs. 1, 2 and 3 may be manufactured as follows.
  • a rustproof steel rod or a copperplated tungsten rod are enveloped helically by a glass rod. After the copper, if any, has been dissolved, the rod is withdrawn from the helix.
  • the glass helix is intended for external supporting over greater lengths, it may be surrounded by a glass cylinder, which is slightly elongated after having been weakened, so that it applies itself about the turns of the glass helix.
  • the glass helix is intended for internal supporting a helical conductor, it may be filled out by synthetic resin or natural resin so as to form a cylinder which may be ground accurately to measure in a centre-less grinding machine or in a different way.
  • a travelling wave tube including electron beamforming means, a helically-Wound electric wave-retarding conductor, an insulating support for said helical conductor comprising a helical member having a plurality of helical turns disposed within said helical conductor and extending parallel thereto, the outer diameter of said helical member being substantially equal to the inner diameter of said helical conductor, said helical member having a finite and greater pitch than said helical conductor over at least part of its length, whereby the member supports the conductor along different peripheral portions thereof and the point of contact between each helical turn of the conductor and the member is peripherally separated by a significant amount from the point of contact of the member and the adjacent helical turn of the conductor.
  • a travelling wave tube including a helically-wound electric wave-retarding conductor, an insulating support for said helical conductor comprising a helical rod having a plurality of helical turns disposed within said helical conductor and extending parallel thereto, the pitch of said helical rod being finite and substantially greater than the pitch of said helically-wound conductor and the outer diameter of said helical rod being substantially equal to the inner diameter of said conductor, whereby the rod supports the conductor along difierent peripheral portions thereof and the pont of contact between each helical turn of the conductor and the member is peripherally separated by a significant amount from-the point of contact of the member and the next adjacent turn of the helical conductor, and the points of contact lie along a helical line, the number of points of contact per turn of the helical conductor being given by the expression where m is the number of turns of the helical conductor and n2 is the number of turns of the member.
  • a travelling wave tube including electron-beam forming means, a helically-wound electric-wave-retarding conductor, an insulating support for said helical conductor comprising a helically-twisted fiat strip having a plurality of helical turns disposed within said helical conductor and extending parallel thereto, the pitch of said helical strip being substantially greater than the pitch of said helically-wound conductor and the outer diameter of said helical strip being substantially equal to the inner diameter of said conductor, whereby the strip supports the conductor and the point of contact between each helical turn of the conductor and the strip is peripherally separated by a significant amount from the point of contact of the strip and the next adjacent turn of the helical conductor, and the points of contact lie along a helical line, the number of points of contact per turn of the helical conductor being given by the expression (niinz) /m where m is the number of turns of the helical conductor and n2 is the number

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  • Microwave Tubes (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
US328582A 1952-01-01 1952-12-30 Travelling wave tube Expired - Lifetime US2757310A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB34/52A GB764681A (en) 1952-01-01 1952-01-01 Improvements in travelling wave tubes

Publications (1)

Publication Number Publication Date
US2757310A true US2757310A (en) 1956-07-31

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Family Applications (1)

Application Number Title Priority Date Filing Date
US328582A Expired - Lifetime US2757310A (en) 1952-01-01 1952-12-30 Travelling wave tube

Country Status (6)

Country Link
US (1) US2757310A (fr)
CH (2) CH305265A (fr)
DE (1) DE933352C (fr)
FR (1) FR1078434A (fr)
GB (1) GB764681A (fr)
NL (1) NL174893B (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2853644A (en) * 1956-07-30 1958-09-23 California Inst Res Found Traveling-wave tube
US2882441A (en) * 1955-08-12 1959-04-14 English Electric Valve Co Ltd Travelling wave amplifier tubes
US2885592A (en) * 1953-11-17 1959-05-05 Philips Corp Travelling wave tube
US2917655A (en) * 1954-12-31 1959-12-15 Philips Corp Electric transmission line
US3121819A (en) * 1959-12-30 1964-02-18 Itt Arrangement for reducing high voltage breakdown between helical windings in traveling wave tubes
US3209198A (en) * 1961-06-28 1965-09-28 Sylvania Electric Prod Resilient helix mount for traveling wave tube
US4041438A (en) * 1976-02-17 1977-08-09 Odette Landeroin Duvernois Electric heating device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2422265A2 (fr) * 1976-09-21 1979-11-02 Thomson Csf Ligne a retard hyperfrequence et tube a propagation d'ondes comportant une telle ligne

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2064469A (en) * 1933-10-23 1936-12-15 Rca Corp Device for and method of controlling high frequency currents
US2110911A (en) * 1933-07-31 1938-03-15 Telefunken Gmbh Electron tube
US2300052A (en) * 1940-05-04 1942-10-27 Rca Corp Electron discharge device system
US2351055A (en) * 1941-11-21 1944-06-13 Henry S Blum Tube for producing multiple wave lengths
US2452572A (en) * 1944-10-20 1948-11-02 John L Jago Delay line
US2489082A (en) * 1944-07-01 1949-11-22 Forest Lee De High-voltage generator
FR984595A (fr) * 1949-02-14 1951-07-09 Csf Tube à propagation d'onde comportant une ligne à retard en forme d'hélice enrobée de verre ou quartz
FR993156A (fr) * 1949-06-08 1951-10-29 Thomson Houston Comp Francaise Structure assurant une réduction de la vitesse de propagation d'une onde électromagnétique
US2653270A (en) * 1944-06-08 1953-09-22 English Electric Valve Co Ltd High-frequency energy interchange device
US2672572A (en) * 1947-07-18 1954-03-16 Philco Corp Traveling wave tube

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2110911A (en) * 1933-07-31 1938-03-15 Telefunken Gmbh Electron tube
US2064469A (en) * 1933-10-23 1936-12-15 Rca Corp Device for and method of controlling high frequency currents
US2300052A (en) * 1940-05-04 1942-10-27 Rca Corp Electron discharge device system
US2351055A (en) * 1941-11-21 1944-06-13 Henry S Blum Tube for producing multiple wave lengths
US2653270A (en) * 1944-06-08 1953-09-22 English Electric Valve Co Ltd High-frequency energy interchange device
US2489082A (en) * 1944-07-01 1949-11-22 Forest Lee De High-voltage generator
US2452572A (en) * 1944-10-20 1948-11-02 John L Jago Delay line
US2672572A (en) * 1947-07-18 1954-03-16 Philco Corp Traveling wave tube
FR984595A (fr) * 1949-02-14 1951-07-09 Csf Tube à propagation d'onde comportant une ligne à retard en forme d'hélice enrobée de verre ou quartz
FR993156A (fr) * 1949-06-08 1951-10-29 Thomson Houston Comp Francaise Structure assurant une réduction de la vitesse de propagation d'une onde électromagnétique
GB668017A (en) * 1949-06-08 1952-03-12 Vickers Electrical Co Ltd Improvements relating to electromagnetic waveguides

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2885592A (en) * 1953-11-17 1959-05-05 Philips Corp Travelling wave tube
US2917655A (en) * 1954-12-31 1959-12-15 Philips Corp Electric transmission line
US2882441A (en) * 1955-08-12 1959-04-14 English Electric Valve Co Ltd Travelling wave amplifier tubes
US2853644A (en) * 1956-07-30 1958-09-23 California Inst Res Found Traveling-wave tube
US3121819A (en) * 1959-12-30 1964-02-18 Itt Arrangement for reducing high voltage breakdown between helical windings in traveling wave tubes
US3209198A (en) * 1961-06-28 1965-09-28 Sylvania Electric Prod Resilient helix mount for traveling wave tube
US4041438A (en) * 1976-02-17 1977-08-09 Odette Landeroin Duvernois Electric heating device

Also Published As

Publication number Publication date
NL174893B (nl) 1956-09-15
DE933352C (de) 1955-09-22
CH305265A (fr) 1955-02-15
NL84206C (fr) 1957-02-15
GB764681A (en) 1957-01-02
CH310060A (de) 1955-09-30
FR1078434A (fr) 1954-11-18

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