US2856555A - Traveling wave tube - Google Patents

Traveling wave tube Download PDF

Info

Publication number
US2856555A
US2856555A US570315A US57031556A US2856555A US 2856555 A US2856555 A US 2856555A US 570315 A US570315 A US 570315A US 57031556 A US57031556 A US 57031556A US 2856555 A US2856555 A US 2856555A
Authority
US
United States
Prior art keywords
electrode
traveling wave
target electrode
tube
output
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
US570315A
Other languages
English (en)
Inventor
Kenmokn Masamichi
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric 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 International Standard Electric Corp filed Critical International Standard Electric Corp
Application granted granted Critical
Publication of US2856555A publication Critical patent/US2856555A/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
    • 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

  • FIG. 2. FIG. 3.
  • an electron beam directed along a fixed axis for interaction with a wave propagated along a retardation circuit on this axis.
  • input and output couplers which have element coupler devices fastened to opposite ends of the retardation line, which is usually a helix.
  • the input and output wave guides have flange portions extending along these coupler units to provide a high frequency choke action.
  • a target electrode which is insulated from the line both for direct and high frequency currents.
  • the traveling wave envelope may be shortened by providing a capacitive coupling between the terminal coupler element and the target electrode so that the target electrode can then serve the function of providing the internal element of the choke used with the output wave guide.
  • Fig. 1 is a diagrammatic sectional view of a traveling wave tube incorporating a feature of this invention.
  • Figs. 2 and 3 are modified forms of delay line termination and target electrodes for use in the tube of Fig. 1, and
  • Fig. 4 is a further modification of a terminal electrode structure incorporating the features of this invention.
  • a traveling wave tube having an electron gun I for transmitting a beam internally of a helical delay line 2.
  • the tube envelope 3 has sealed to one end the target or collector electrode 4 which may be exposed directly to the air.
  • the input coupler unit which serves with the flange on the input wave guide as a choke.
  • This unit 5 is connected directly to the helix 3 by means of a unit 6 and at its other end the helix 2 is connected to a unit 7 fastened directly to a metal disc plate 8.
  • Plate 8 is insulated by an insulating layer 9, which may be of mica or the like, from the collector electrode 4.
  • the output wave guide 10 has a flange 15 overlying the target electrode 4.
  • the inner surface of the target electrode 4, as shown at 4, may be made flush with the inner wall of wave guide 10 and the flange 15 connected directly thereto avoiding the necessity of a choke electrode at the output end. As there is no gap between the walls of wave guide 10' and collector 4 there will be no high frequency leakage past this point, except for the energy which may leak through the insulator 9.
  • insulator 9 may be achieved by the structural arrangements indicated in Figs. 2 and 3.
  • the coupler unit 7 at the terminal end of the helix 2 is coupled with the collector electrode 4 by means of insulating material 10.
  • an opening penetrating into electrode 4 is provided as shown at electrode 11 so as to receive the electron beam internally thereof.
  • a grid electrode may be arranged across this opening as indicated at 11 so as to picK up any secondary electrons which may be emitted by impingement of the beam on the target electrode.
  • Fig. 3 is similar in general structure to Fig. 2. However, in this case the hole 12 is provided in target electrode 4 and a pin 13 is used connected to the disc plate 8 and extending out to provide a terminal. 14 for the application of high voltage energy to the helical electrode.
  • Fig. 4 a modified form of the invention in which the output coupler electrode 18 is formed as a hollow cylindrical element fastened to the helical delay line by conductor 16.
  • the target electrode 17 is cupshaped and has flange wall portions extending concentrically of the element 18 and insulated therefrom by means of an insulating annulus 19. This element is contained within the envelope 3, and flange 15 of output wave guide 10 is capacitively coupled therewith to provide the output choke.
  • the target electrode 17 is made substantially a quarter wave length long at the mid operating frequency to provide the desired choking effect.
  • a traveling wave tube having a retardation line, a beam source for projecting a beam along said line for interaction with high frequency energy transmitted along said line, input and output couplers for energy in said line and a target electrode for the electron energy of said beam after passage along said line, said output coupler arrangement comprising a coupling means connected to one end of said line providing a capacitive coupling with said target electrode, an output wave guide havingone wall thereof substantially aligned with the end of said target electrode adjacent to said one end, and a choke flange on said wave guide extending coaxially over and coupled to said target electrode.
  • said capacitive coupling means comprises a metal disc plate, and insulating material intermediate said disc and said target electrode.
  • the combination UNITED STATES PATENTS wherein said capacitive coupling means comprises a cylin- 2,673,900 Mumford M31. 30, 1954 drical terminal for said line, and a target electrode having 5 ,9 Wamecke et a1 111116 1954 an annular portion insulated from and surrounding said 2,752,523 Goodall June 26, 1956 terminal.

Landscapes

  • Microwave Tubes (AREA)
US570315A 1955-05-18 1956-03-08 Traveling wave tube Expired - Lifetime US2856555A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2856555X 1955-05-18

Publications (1)

Publication Number Publication Date
US2856555A true US2856555A (en) 1958-10-14

Family

ID=17694345

Family Applications (1)

Application Number Title Priority Date Filing Date
US570315A Expired - Lifetime US2856555A (en) 1955-05-18 1956-03-08 Traveling wave tube

Country Status (2)

Country Link
US (1) US2856555A (en, 2012)
BE (1) BE547879A (en, 2012)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3151267A (en) * 1960-04-01 1964-09-29 Siemens Ag Travelling wave tube including tuning slide within adjoining waveguide section
US3535580A (en) * 1968-03-21 1970-10-20 English Electric Valve Co Ltd Helix type travelling wave tubes

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2673900A (en) * 1946-10-23 1954-03-30 Bell Telephone Labor Inc High-frequency amplifying device
US2681951A (en) * 1948-09-01 1954-06-22 Csf Low background noise amplifying system for ultra-short waves
US2752523A (en) * 1951-05-15 1956-06-26 Int Standard Electric Corp Electron discharge apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2673900A (en) * 1946-10-23 1954-03-30 Bell Telephone Labor Inc High-frequency amplifying device
US2681951A (en) * 1948-09-01 1954-06-22 Csf Low background noise amplifying system for ultra-short waves
US2752523A (en) * 1951-05-15 1956-06-26 Int Standard Electric Corp Electron discharge apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3151267A (en) * 1960-04-01 1964-09-29 Siemens Ag Travelling wave tube including tuning slide within adjoining waveguide section
US3535580A (en) * 1968-03-21 1970-10-20 English Electric Valve Co Ltd Helix type travelling wave tubes

Also Published As

Publication number Publication date
BE547879A (en, 2012)

Similar Documents

Publication Publication Date Title
US2660689A (en) Ultrahigh-frequency vacuum tube
US2312723A (en) Electron discharge device
GB623537A (en) Improvements in or relating to electron discharge devices
US2680209A (en) High-frequency apparatus
GB701034A (en) Improvements in or relating to travelling wave amplifiers
US2733305A (en) Diemer
GB672770A (en) High frequency electron discharge device and circuit
US2856555A (en) Traveling wave tube
US2889487A (en) Traveling-wave tube
US2712614A (en) Travelling wave tubes
US2636148A (en) Modified traveling wave tube
GB668554A (en) Improvements in or relating to signalling systems employing travelling wave discharge apparatus
US2843790A (en) Traveling wave amplifier
US2698421A (en) Wave guide seal and filter structure
US2890373A (en) Retarded wave electron discharge device
US2758244A (en) Electron beam tubes
GB727838A (en) Improvements in or relating to microwave transducers
US3209272A (en) Wide band traveling wave tube amplifier apparatus
GB660107A (en) Improvements in or relating to electron velocity modulation discharge devices
US2408216A (en) Beam deflection electron discharge device
US2857480A (en) Space charge grid electron beam amplifier with dual outputs
US2407706A (en) Electron discharge device
US2222898A (en) High-frequency apparatus
US3480828A (en) Thyratron waveguide switch with density enhancement for operation in 27 to 40 ghz. range
US2921224A (en) Traveling wave tube amplifier