US3114857A - Travelling-wave tube with connectors for the end turns of the helix - Google Patents

Travelling-wave tube with connectors for the end turns of the helix Download PDF

Info

Publication number
US3114857A
US3114857A US43056A US4305660A US3114857A US 3114857 A US3114857 A US 3114857A US 43056 A US43056 A US 43056A US 4305660 A US4305660 A US 4305660A US 3114857 A US3114857 A US 3114857A
Authority
US
United States
Prior art keywords
conductor
helical conductor
helix
electron beam
travelling
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
US43056A
Inventor
Fokker Theodorus Wil Hendricus
Johan Gerard Van Wijngaarden
Versnel Arie
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.)
US Philips Corp
North American Philips Co Inc
Original Assignee
US Philips Corp
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 US Philips Corp filed Critical US Philips Corp
Application granted granted Critical
Publication of US3114857A publication Critical patent/US3114857A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01J23/30—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
    • H01J23/36—Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy
    • H01J23/40—Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy to or from the interaction circuit
    • H01J23/42—Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy to or from the interaction circuit the interaction circuit being a helix or a helix-derived slow-wave structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
    • H01J25/34—Travelling-wave tubes; Tubes in which a travelling wave is simulated at spaced gaps
    • H01J25/36—Tubes in which an electron stream interacts with a wave travelling along a delay line or equivalent sequence of impedance elements, and without magnet system producing an H-field crossing the E-field
    • H01J25/38—Tubes in which an electron stream interacts with a wave travelling along a delay line or equivalent sequence of impedance elements, and without magnet system producing an H-field crossing the E-field the forward travelling wave being utilised

Definitions

  • This invention relates to travelling-wave tubes in which the electron beam is in interaction with a helical conductor having its ends secured to disc-shaped or annular conductors which are directed at right angles to the axis of the tube and which close the apertures of the wave-guides to which the tube is coupled.
  • An object of the invention is to provide a structure which affords advantages with respect to known tubes.
  • conductors are provided, one at each end of the helical conductor, which extend substantially parallel to the axis of the helical conductor at same distance outside it and which are connected, on the one hand, to the disc-shaped or annular conductor to which the helical conductor is connected and, on the other hand, to a point remote several turns from the end of the helical conductor.
  • the electron beam extends throughout its length in a symmetrical potential field so that electrons are not unnecessarily lost from the beam and charging of ceramic supports in the surroundings does not occur, whilst also proper matching of the helix to the waveguides to be connected to the tube may readily be achieved.
  • a structure is already known in which, as reckoned from the end of the helical conductor, a straight conductor extends towards an annular conductor positioned more towards the .centre of the tube, but in this case the helical conductor does not extend to the vicinity of the conductors closing the waveguides to which the tube is connected.
  • a structure is also known in which a conductor extends through the insulating wall of the tube, at a point located several turns from the end, at right angles to the helix and terminates in a wave-guide.
  • the helical conductor does not extend far enough at its ends.
  • FIG. 1 shows a longitudinal section of a travellingwave tube according to the invention
  • FIG. 2 shows a cross-section in the direction of arrows 11-11 in FIG. 1;
  • FIG. 3 is .a cross section in the direction of the arrows IlIIlI in FIG. 1.
  • reference numeral 1 indicates the glass wall of the travelling-wave tube which is provided with two lead-through discs 2 and 3.
  • a helical conductor 5 Secured to the disc 2 by means of a cylindrical transition piece 4 is a helical conductor 5 which is supported by three ceramic rods 6 provided with a number of cuts corresponding to the pitch of the helix.
  • the helical conductor is surrounded by mica plates 8 and 21 which are covered with damping material 9 and 22, respectively, and which are at right angles to the plane of the drawing near the cathode half of the helix and parallel to the drawing near the output half of the helix.
  • the plates 8 (FIG. 2) and plates 21 (FIG. 3) are supported in mica discs 10 p0- sitioned at right angles to the axis of the tube and held together by means of two ceramic rods 11.
  • the plates 8 and plates 21 are supported in the direction of their length by means of mica plates 12 and 23, respectively.
  • a transition piece 13 to which the other end of the helical conductor 5 is secured.
  • a conductor 14 connected to the transition piece and to a point about three turns from the end.
  • a glass portion 15 contains an electron gun 16 and an accelerating electrode 17.
  • a glass cylinder 18 insulates a collecting electrode 19 from lead-through disc 3. The heat produced in collecting electrode 19 is dissipated by natural cooling of cooling fins 20.
  • An electron discharge device comprising an evacuated envelope, means within said envelope to produce a beam of electrons, a collector electrode in the path of the beam of electrons, a helical conductor between the electron beam producing means and the collector elecrode and surrounding the electron beam, an annular conductor transverse to the path of the electron beam between each of the ends of said helical conductor and beam producing means and the collector electrode respectively to which the ends of said helical conductor are connected, and conductor means positioned parallel to the path of the electron beam connecting each of said annular conductors to said helical conductor several turns remote from each end thereof,
  • a travelling-wave tube as claimed in claim 1 in which the helical conductor is arranged between two sets of parallel plates which are covered with damping material, said sets of parallel plates being at right angles to each other in the two halves of the tube.

Landscapes

  • Microwave Tubes (AREA)

Description

1963 T. w. H. FOKKER ETAL 3,114,857
TRAVELLINGWAVE TUBE WITH CONNECTORS FOR THE END TURNS OF THE HELIX Filed July 15. 1960 INVENTORS THEODORUS WILHELMUS HENDRICUS FOKKER JOHAN GERARD VAN WIJNGAARDEN ARIE VERSNEL AQM United States Patent 3,114,857 TRAVELLHJG-WAVE TUBE WITH CONNECTORS FOR THE END TURNS OF THE HELEX Theodorus Wiihelmus Hendricns Fokker, Hilversum, and
Johan Gerard van Wijngaarden and Arie Versnel, Eindhoven, Netherlands, assignors to North American Philips Company, lac, New York, N.Y., a corporation of Delaware Filed duly 15, 1960, Ser. No. 43,056 Claims priority, application Netherlands July 17, 1959 2 Claims. (Cl. 315--3.5)
This invention relates to travelling-wave tubes in which the electron beam is in interaction with a helical conductor having its ends secured to disc-shaped or annular conductors which are directed at right angles to the axis of the tube and which close the apertures of the wave-guides to which the tube is coupled.
Structures of the above-mentioned kind are already known. In such structures the coupling between the helix and the hollow wave-guide is not wholly sufiicient. The annular conductor sometimes has an axially-directed portion to which the helical conductor is connected. However, this involves the disadvantage that the electron beam extends over part of its path in an asymmetric potential field, which gives rise to heating of the conductors due to striking electrons and to charging of ceramic supports present in the surroundings.
Similar ditficulties as mentioned above likewise occur if the end of the helical conductor has a portion extending in an axial direction.
An object of the invention is to provide a structure which affords advantages with respect to known tubes.
According to the invention, in a travelling-wave tube in which the electron beam is in interaction with a helical conductor having its ends connected to disc-shaped or annular conductors directed at right angles to the axis of the tube, conductors are provided, one at each end of the helical conductor, which extend substantially parallel to the axis of the helical conductor at same distance outside it and which are connected, on the one hand, to the disc-shaped or annular conductor to which the helical conductor is connected and, on the other hand, to a point remote several turns from the end of the helical conductor.
In a structure according to the invention, it is achieved that the electron beam extends throughout its length in a symmetrical potential field so that electrons are not unnecessarily lost from the beam and charging of ceramic supports in the surroundings does not occur, whilst also proper matching of the helix to the waveguides to be connected to the tube may readily be achieved.
A structure is already known in which, as reckoned from the end of the helical conductor, a straight conductor extends towards an annular conductor positioned more towards the .centre of the tube, but in this case the helical conductor does not extend to the vicinity of the conductors closing the waveguides to which the tube is connected.
A structure is also known in which a conductor extends through the insulating wall of the tube, at a point located several turns from the end, at right angles to the helix and terminates in a wave-guide. In this case also, the helical conductor does not extend far enough at its ends.
In order that the invention may be readily carried into 3,114,857 Patented Dec. 17, 1963 effect, one embodiment thereof will now be explained in detail, by way of example, with reference to the accompanying diagrammatic drawing, in which:
FIG. 1 shows a longitudinal section of a travellingwave tube according to the invention,
FIG. 2 shows a cross-section in the direction of arrows 11-11 in FIG. 1; and
FIG. 3 is .a cross section in the direction of the arrows IlIIlI in FIG. 1.
In FIG. 1, reference numeral 1 indicates the glass wall of the travelling-wave tube which is provided with two lead-through discs 2 and 3. Secured to the disc 2 by means of a cylindrical transition piece 4 is a helical conductor 5 which is supported by three ceramic rods 6 provided with a number of cuts corresponding to the pitch of the helix. The helical conductor is surrounded by mica plates 8 and 21 which are covered with damping material 9 and 22, respectively, and which are at right angles to the plane of the drawing near the cathode half of the helix and parallel to the drawing near the output half of the helix. The plates 8 (FIG. 2) and plates 21 (FIG. 3) are supported in mica discs 10 p0- sitioned at right angles to the axis of the tube and held together by means of two ceramic rods 11. The plates 8 and plates 21 are supported in the direction of their length by means of mica plates 12 and 23, respectively.
Provided in the lead-through disc 3 is a transition piece 13 to which the other end of the helical conductor 5 is secured.
At each end of the helical conductor there is provided a conductor 14 connected to the transition piece and to a point about three turns from the end.
A glass portion 15 contains an electron gun 16 and an accelerating electrode 17. A glass cylinder 18 insulates a collecting electrode 19 from lead-through disc 3. The heat produced in collecting electrode 19 is dissipated by natural cooling of cooling fins 20.
What is claimed is:
1. An electron discharge device comprising an evacuated envelope, means within said envelope to produce a beam of electrons, a collector electrode in the path of the beam of electrons, a helical conductor between the electron beam producing means and the collector elecrode and surrounding the electron beam, an annular conductor transverse to the path of the electron beam between each of the ends of said helical conductor and beam producing means and the collector electrode respectively to which the ends of said helical conductor are connected, and conductor means positioned parallel to the path of the electron beam connecting each of said annular conductors to said helical conductor several turns remote from each end thereof,
2. A travelling-wave tube as claimed in claim 1 in which the helical conductor is arranged between two sets of parallel plates which are covered with damping material, said sets of parallel plates being at right angles to each other in the two halves of the tube.
References Cited in the file of this patent UNITED STATES PATENTS 2,584,802 Hansell Feb. 5, 1952 2,595,698 Peter May 6, 1952 2,742,588 Hollenberg Apr. 17, 1956 2,798,183 Sensiper July 2, 1957 2,850,666 Brewer Sept. 2, 1958

Claims (1)

1. AN ELECTRON DISCHARGE DEVICE COMPRISING AN EVACUATED ENVELOPE, MEANS WITHIN SAID ENVELOPE TO PRODUCE A BEAM OF ELECTRONS, A COLLECTOR ELECTRODE IN THE PATH OF THE BEAM OF ELECTRONS, A HELICAL CONDUCTOR BETWEEN THE ELECTRON BEAM PRODUCING MEANS AND THE COLLECTOR ELECRODE AND SURROUNDING THE ELECTRON BEAM, AN ANNULAR CONDUCTOR TRANSVERSE TO THE PATH OF THE ELECTRON BEAM BETWEEN EACH OF THE ENDS OF SAID HELICAL CONDUCTOR AND BEAM PRODUCING MEANS AND THE COLLECTOR ELECTRODE RESPECTIVELY TO WHICH THE ENDS OF SAID HELICAL CONDUCTOR ARE CONNECTED, AND CONDUCTOR MEANS POSITIONED PARALLEL TO THE PATH OF THE ELECTRON BEAM CONNECTING EACH OF SAID ANNULAR CONDUCTORS TO SAID HELICAL CONDUCTOR SEVERAL TURNS REMOTE FROM EACH END THEREOF.
US43056A 1959-07-17 1960-07-15 Travelling-wave tube with connectors for the end turns of the helix Expired - Lifetime US3114857A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL3114857X 1959-07-17
NL241394 1959-07-17

Publications (1)

Publication Number Publication Date
US3114857A true US3114857A (en) 1963-12-17

Family

ID=26641696

Family Applications (1)

Application Number Title Priority Date Filing Date
US43056A Expired - Lifetime US3114857A (en) 1959-07-17 1960-07-15 Travelling-wave tube with connectors for the end turns of the helix

Country Status (2)

Country Link
US (1) US3114857A (en)
DE (1) DE1136425B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3274429A (en) * 1963-03-18 1966-09-20 Varian Associates High frequency electron discharge device with heat dissipation means
US3729644A (en) * 1970-12-04 1973-04-24 Nippon Electric Co Helix traveling-wave tube
DE4008643A1 (en) * 1990-03-17 1991-09-19 Daimler Benz Ag METHOD FOR SETTING A SET VALUE OF THE EXPANSION OF AN ACTUATOR VARIABLE IN ITS LENGTH EXTENSION, BY USING AN EXTERNAL ELECTROMAGNETIC OR ELECTROSTATIC FIELD

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2584802A (en) * 1947-01-18 1952-02-05 Rca Corp Very high-frequency electron tube
US2595698A (en) * 1949-05-10 1952-05-06 Rca Corp Electron discharge device and associated circuit
US2742588A (en) * 1950-01-07 1956-04-17 Bell Telephone Labor Inc Electronic amplifier
US2798183A (en) * 1954-11-29 1957-07-02 Hughes Aircraft Co Traveling-wave tube
US2850666A (en) * 1955-12-01 1958-09-02 Hughes Aircraft Co Helix structure for traveling-wave tubes

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2761915A (en) * 1952-02-08 1956-09-04 Bell Telephone Labor Inc Helix couplers
BE523425A (en) * 1952-04-08 1900-01-01
BE520379A (en) * 1952-06-02
BE541462A (en) * 1953-03-26 1900-01-01

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2584802A (en) * 1947-01-18 1952-02-05 Rca Corp Very high-frequency electron tube
US2595698A (en) * 1949-05-10 1952-05-06 Rca Corp Electron discharge device and associated circuit
US2742588A (en) * 1950-01-07 1956-04-17 Bell Telephone Labor Inc Electronic amplifier
US2798183A (en) * 1954-11-29 1957-07-02 Hughes Aircraft Co Traveling-wave tube
US2850666A (en) * 1955-12-01 1958-09-02 Hughes Aircraft Co Helix structure for traveling-wave tubes

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3274429A (en) * 1963-03-18 1966-09-20 Varian Associates High frequency electron discharge device with heat dissipation means
US3729644A (en) * 1970-12-04 1973-04-24 Nippon Electric Co Helix traveling-wave tube
DE4008643A1 (en) * 1990-03-17 1991-09-19 Daimler Benz Ag METHOD FOR SETTING A SET VALUE OF THE EXPANSION OF AN ACTUATOR VARIABLE IN ITS LENGTH EXTENSION, BY USING AN EXTERNAL ELECTROMAGNETIC OR ELECTROSTATIC FIELD

Also Published As

Publication number Publication date
DE1136425B (en) 1962-09-13

Similar Documents

Publication Publication Date Title
US2585582A (en) Electron gun
US2680209A (en) High-frequency apparatus
US2850666A (en) Helix structure for traveling-wave tubes
GB756370A (en) Travelling wave electron discharge devices
US2853642A (en) Traveling-wave tube
US2410054A (en) Electron discharge apparatus
US3612934A (en) Collector for electron tubes
US2922067A (en) High frequency energy interchange device
US3398315A (en) A traveling wavetube with improved thermal and magnetic circuitry
US2226653A (en) Electromagnetic oscillation apparatus
US3271615A (en) Traveling wave electron discharge device having means exerting a radial force upon the envelope
US3114857A (en) Travelling-wave tube with connectors for the end turns of the helix
US2966610A (en) Electron beam tube
US3717787A (en) Compact depressed electron beam collector
US2789247A (en) Traveling wave tube
US2806171A (en) Helix support for traveling-wave tube
US2824257A (en) Traveling wave tube
GB1005835A (en) A travelling wave tube
US3382399A (en) Modified traveling wave tube
US3374388A (en) Traveling wave tube having tapered grooves and shims for improved thermal contact between metal envelope, support rods and slow wave helix
US2408238A (en) Space discharge device
US3271614A (en) Electron discharge device envelope structure providing a radial force upon support rods
US3436588A (en) Electrostatically focused klystron having cavities with common wall structures and reentrant focusing lens housings
US2976454A (en) High frequency energy interchange device
US3293478A (en) Traveling wave tube with longitudinal recess