US2306860A - Electron discharge device for very high frequencies - Google Patents

Electron discharge device for very high frequencies Download PDF

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Publication number
US2306860A
US2306860A US354657A US35465740A US2306860A US 2306860 A US2306860 A US 2306860A US 354657 A US354657 A US 354657A US 35465740 A US35465740 A US 35465740A US 2306860 A US2306860 A US 2306860A
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United States
Prior art keywords
electrons
cylinders
electron discharge
resonator
discharge device
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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
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US354657A
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English (en)
Inventor
Black Donald Harrison
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International Standard Electric Corp
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International Standard Electric Corp
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Publication date
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
    • H01J25/02—Tubes with electron stream modulated in velocity or density in a modulator zone and thereafter giving up energy in an inducing zone, the zones being associated with one or more resonators
    • H01J25/10—Klystrons, i.e. tubes having two or more resonators, without reflection of the electron stream, and in which the stream is modulated mainly by velocity in the zone of the input resonator
    • H01J25/18—Klystrons, i.e. tubes having two or more resonators, without reflection of the electron stream, and in which the stream is modulated mainly by velocity in the zone of the input resonator with radial or disc-like electron stream perpendicular to the axis of the resonators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
    • H01J25/02—Tubes with electron stream modulated in velocity or density in a modulator zone and thereafter giving up energy in an inducing zone, the zones being associated with one or more resonators

Definitions

  • This invention relates to electron discharge de-v vices Aof the so-called velocity modulated type.
  • a beam of .electrons of uniform velocity is passed through a gap in a resonator to which is applied the resonant frequency, across the gap, the electrons are accelerated or decelerated according to the phase of the oscillations at the time at which they pass.r After In passing leaving this resonant system, ⁇ or modulator, the
  • the invention resides in an electron discharge device of the velocity modulated type comprising two co-axial cavity resonators of annular cross-section lying one within the other and an electrode system for projecting electrons radially through grids or apertures in the resonator walls.
  • the invention resides in an y electron discharge device of the velocity modulated type wherein two resonant cavities of annular cross-section are deiined by co-axial cylindrical surfaces, an electron source being provided along the axis of the structure for projecting electrons radially through grids or apertures in the cylindrical surfaces.
  • FIG. 1 is a cross-sectional elevation of an electron discharge' device Aincorr'noiating features of the invention
  • Fig. z is a cross-sectional view taken substantially in the kplane of 2-2 in Fig. l;
  • Figs. 3 and 4 are further cross-sectional views taken transversely to the plane of Fig. 1,
  • Fig. 1 is a section through the structure a cathode I is surrounded by av series of concentric grids 2, 3, 5, 1 ⁇ 9, the axis of revolution being X- ⁇ X.
  • the grids are represented by dottedlines butin practice would probably be of squirrel cage formation, up from a series of rods.
  • Fig.'2 shows a sectional view across the line 2-2 of Fig. 1. It will be noticed that the rods forming the respective grids lie on radial lines extending from the cathode. This is a preferred arrangement in order to reduce the number lof electrons collected by the grids.
  • Grid 2 is normally operated at a negative potential with respect to the cathode and its purposeis to control the magnitude of the space current.
  • the spaces between the ends of the cylinders are closed by the annular discs I6 and I9.
  • the two cylinders with their end discs thus form a resonator of the concentric line type.
  • grids 1 and 9 form portions of the cylinders 8 and I which with the end discs I1 and I8 form a second concentric line resonator.
  • Cylinders 6 and 8 are Joined by two discs placed at the ends of the grid portions as shown.
  • the cylinder I I collects the electrons which pass through the system.
  • the electrons in passing from the cathode I to the collector II pass through two resonators. If the inner resonator has oscillations applied to it, the electrons will be velocity modulated as described above. While moving between the field free space between the inner and the outer cylinders, bunching or the electrons will take place and energy will be imparted to the outer resonator. Oscillations set up in the second resonator may be taken ol by means of lead I2 which contacts with the cylinder 8 through a concentric tube I3. Other methods for withdrawing energy from the second resonator are possible.
  • Fig. 1 and Fig. 3 which is a section across the line being made Y 3-3 Fig. 1.
  • An elongated loop of wire Il has 'one limb, in fthe centre of a connecting tube I 5 and theother'limb just outside@ in the wall o! Il.
  • the rounded ends of the '99p project into the inner and outer resonators.v v ⁇ '*Ihe coupling between the two resonators displacement of the loop which exposes a greater area of loop in one resonator than in the other.
  • Fig. 4 shows how this may Abe imf byannular discs, said inner and said outer pairs" being coaxial with each spaced annular discs between said inner and outer pairs of cylinders providing a substantially ileldother, a pair of axially :I vfree ,drift/space., generally longitudinally extendproved by replacing the rods with stripsl ofmetal set radially. The could then be placed on the inner cumferences of 1 and 9 respectively.
  • nator may have a xed frequency vand the other may beA tuned by sliding the end -disclsof the inner resonator up and down.
  • the structure may be wholly enclosedor'parts of the resonators may'form parts of envelope.
  • An electron ldischarge device including an inner pair of coaxialvsheet-metal cylinders joined at their ends by annular discs, an outer pair ⁇ of coaxial sheet-metal cylinders joined at their ends by annular discs. said inner and said outer pairs said cylinders, through said tube into the two cylinders. a' 3.
  • An- .e1ectrcn discharge device including a/ han outer pair of Vcoaxial ing vgrid members provided between said axially spaced annular discs in apertures in each of the wallsofsaid cylinders, a connecting tube between "and a loop ot wire projecting cathode, a grid surrounding/said cathode; inner pairof coaxial sheet-metal cylinders surrounding said grid and joined at their ends yby lanniiva'rdiscs.

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  • Microwave Tubes (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
US354657A 1939-09-13 1940-08-29 Electron discharge device for very high frequencies Expired - Lifetime US2306860A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB266982X 1939-09-13

Publications (1)

Publication Number Publication Date
US2306860A true US2306860A (en) 1942-12-29

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ID=10247792

Family Applications (1)

Application Number Title Priority Date Filing Date
US354657A Expired - Lifetime US2306860A (en) 1939-09-13 1940-08-29 Electron discharge device for very high frequencies

Country Status (4)

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US (1) US2306860A (en, 2012)
BE (1) BE441498A (en, 2012)
CH (1) CH266982A (en, 2012)
GB (1) GB534696A (en, 2012)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2424805A (en) * 1942-11-13 1947-07-29 Gen Electric High-frequency magnetron
US2432571A (en) * 1943-02-24 1947-12-16 Rca Corp Electron discharge device employing resonators
US2434962A (en) * 1940-05-17 1948-01-27 Int Standard Electric Corp Electron discharge device of the cavity resonator type
US2438832A (en) * 1943-09-16 1948-03-30 Rca Corp Oscillator for centimeter waves
US2445810A (en) * 1942-12-04 1948-07-27 Standard Telephones Cables Ltd Ultra high frequency electric oscillator
US2458556A (en) * 1941-04-08 1949-01-11 Bell Telephone Labor Inc Coupled cavity resonator and wave guide apparatus
US2459806A (en) * 1942-01-09 1949-01-25 Int Standard Electric Corp Velocity-modulated electron discharge device
US2466063A (en) * 1943-02-03 1949-04-05 Sperry Corp High-power high-frequency electron discharge apparatus
US2480462A (en) * 1944-01-07 1949-08-30 Western Electric Co Tunable magnetron
US2516853A (en) * 1942-02-16 1950-08-01 Standard Telephones Cables Ltd Electron discharge device for ultra high frequencies
US2561727A (en) * 1943-07-07 1951-07-24 Harold G Cooper Tuning of electrical resonators
US2564385A (en) * 1944-03-25 1951-08-14 Csf Electronic transmitting valve of great power for ultra short waves

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2434962A (en) * 1940-05-17 1948-01-27 Int Standard Electric Corp Electron discharge device of the cavity resonator type
US2458556A (en) * 1941-04-08 1949-01-11 Bell Telephone Labor Inc Coupled cavity resonator and wave guide apparatus
US2459806A (en) * 1942-01-09 1949-01-25 Int Standard Electric Corp Velocity-modulated electron discharge device
US2516853A (en) * 1942-02-16 1950-08-01 Standard Telephones Cables Ltd Electron discharge device for ultra high frequencies
US2424805A (en) * 1942-11-13 1947-07-29 Gen Electric High-frequency magnetron
US2445810A (en) * 1942-12-04 1948-07-27 Standard Telephones Cables Ltd Ultra high frequency electric oscillator
US2466063A (en) * 1943-02-03 1949-04-05 Sperry Corp High-power high-frequency electron discharge apparatus
US2432571A (en) * 1943-02-24 1947-12-16 Rca Corp Electron discharge device employing resonators
US2561727A (en) * 1943-07-07 1951-07-24 Harold G Cooper Tuning of electrical resonators
US2438832A (en) * 1943-09-16 1948-03-30 Rca Corp Oscillator for centimeter waves
US2480462A (en) * 1944-01-07 1949-08-30 Western Electric Co Tunable magnetron
US2564385A (en) * 1944-03-25 1951-08-14 Csf Electronic transmitting valve of great power for ultra short waves

Also Published As

Publication number Publication date
CH266982A (de) 1950-02-28
BE441498A (en, 2012)
GB534696A (en) 1941-03-14

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