US2785341A - Resonator for a magnetron - Google Patents

Resonator for a magnetron Download PDF

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Publication number
US2785341A
US2785341A US388237A US38823753A US2785341A US 2785341 A US2785341 A US 2785341A US 388237 A US388237 A US 388237A US 38823753 A US38823753 A US 38823753A US 2785341 A US2785341 A US 2785341A
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US
United States
Prior art keywords
resonator
magnetron
shells
anode
walls
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
US388237A
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English (en)
Inventor
Ludi Fritz
Notz Hans
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.)
Patelhold Patenverwertungs and Elektro-Holding AG
Original Assignee
Patelhold Patenverwertungs and Elektro-Holding AG
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Publication of US2785341A publication Critical patent/US2785341A/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
    • H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
    • H01J25/50—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field
    • H01J25/52—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field with an electron space having a shape that does not prevent any electron from moving completely around the cathode or guide electrode
    • H01J25/54—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field with an electron space having a shape that does not prevent any electron from moving completely around the cathode or guide electrode having only one cavity or other resonator, e.g. neutrode tubes
    • H01J25/56—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field with an electron space having a shape that does not prevent any electron from moving completely around the cathode or guide electrode having only one cavity or other resonator, e.g. neutrode tubes with interdigital arrangements of anodes, e.g. turbator tube
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P7/00—Resonators of the waveguide type
    • H01P7/06—Cavity resonators

Definitions

  • the vpresent invention relates to the mechanical construction of the resonator for a magnetron such as dis closed in Patent No. 2,579,593, Fritz Ldi.
  • This magnetron includes a resonator which consists of an annular hollow body which is at least nearly closed and is limited in radial direction by two cylindrical surfaces, the inner cylindrical surface being formed by a plurality of anode segments which are alternately connected with one and the other annular side walls of the resonator and extend perpendicular to the axis of the resonator.
  • Objects of the present invention are to provide a magnetron resonator which is mechanically very sturdy and which may be manufactured in quantities with very small tolerances.
  • a further object is to provide a magnetron resonator having a simple and elicient system of terminal connections for abstracting the generated electromagnetic waves from the generator.
  • Fig. 1 is a substantially central section through a magnetron resonator embodying the invention
  • Fig. 2 is an end elevation of the same.
  • Fig. 3 is an elevation of one of the anode segments.
  • the reference numerals 1 and 2 lidentify the annular end walls of two oppositely arranged and cup-shaped shells whose cylindrical walls la, 2a, respectively, are telescoped and soldered to constitute. the outer cylindrical wall of the resonator.
  • the circular openings 3 of the end walls of the two shells are axially alined and of the same diameter d.
  • Each anode segment 4 is of sheet metal of approximately trapezoidal form with an inner edge a parallel to the resonator axis, and with the several inner edges defining a cylindrical surface of somewhat smaller diameter than the diameter d of the circular openings in the end walls 1 and 2 of the cup-shaped shells.
  • This projection of the anode plates into the axial opening of the resonator facilitates the accurate positioning of the anode segments during manufacture by means of a simple cylindrical gauge which fits within the axial opening and has uniformly spaced axial grooves for the reception of the edges of the anode plates.
  • Each anode plate 4 has a deep slot s adjacent its broader end, and perpendicular to the active edge a, for fitting snugly over an annular end wall of one of the shells of the resonator. After proper assembly of the anode segments within the telescoped shells by means of the gauge, not shown, the segments are individually soldered to their supporting walls and the gauge is removed axially from the resonator. It will be noted that the anode plates are of such length and taper that the smaller free end of each plate is spaced radially from the adjacent end wall but projects axially beyond the same.
  • the projection of the anode plates enables a very simple arrangement for the withdrawal of the generated energy.
  • a symmetrical high-frequency or Lecher line is connected to the tips of two opposite phase anode segments for this purpose.
  • the high-frequency line 5 is arranged without major curvature and completely outside the resonator; and therefore breaks in its side walls or in its outer cylindrical surface are unnecessary.
  • Molybdenum is preferably employed as the material for the construction of the resonator as it is heat resistant and may be soldered with the use of technical piatinuin.
  • a coating of zirconium may be applied over the finished resonator to improve the heat radiation during operation of the magnetron and also to serve as a getter during the evacuation of an envelope within which the resonator and an appropriate cathode are installed.
  • a magnetron resonator comprising two oppositely arranged and cup-shaped shells having their cylindrical walls telescoped and secured to each other to constitute the outer cylindrical wall of the resonator, the end walls of the shells constituting the side walls of the resonator and having axially aligned circular openings of the same diameter therethrough, and an even number of flat metal plates constituting anodes uniformly spaced circumferentially in radial planes through the axis of the assembled shells, said plates being secured in alternation to the respective shells and each with its free end spaced from the shell to which it is not secured, each of said plates having a slot therein extending perpendicularly to the inner edge thereof and being arranged with the slot thereof fitted over the end wall of the shell to which it is secured, the inner edge of each plate extending parallel to the axis of the assembled shells and closer to the axis of the assembled shells than the inner edges of the circular openings in the end walls of said shells.
  • each anode metal plate is of approximately trapezoidal form.

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  • Microwave Tubes (AREA)
US388237A 1952-10-30 1953-10-26 Resonator for a magnetron Expired - Lifetime US2785341A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH2785341X 1952-10-30

Publications (1)

Publication Number Publication Date
US2785341A true US2785341A (en) 1957-03-12

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ID=4571776

Family Applications (1)

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US388237A Expired - Lifetime US2785341A (en) 1952-10-30 1953-10-26 Resonator for a magnetron

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US (1) US2785341A (de)
CH (1) CH306182A (de)
DE (1) DE924576C (de)
FR (1) FR1090790A (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1233498B (de) * 1958-03-10 1967-02-02 Egyesuelt Izzolampa Magnetronroehre mit einem einzigen, eine Interdigitalstruktur aufweisenden Resonator
DE1094374B (de) * 1958-11-03 1960-12-08 Iapatelholdia Patentverwertung Einkreis-Magnetronroehre mit einem die Kathode koaxial umschliessenden toroidfoermigen Hohlraumresonator

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2478644A (en) * 1943-10-23 1949-08-09 Raytheon Mfg Co Electrical discharge device of the magnetron type
US2500430A (en) * 1944-07-28 1950-03-14 Bell Telephone Labor Inc Cavity resonator oscillator device
US2578569A (en) * 1949-12-09 1951-12-11 Sylvania Electric Prod Variable-frequency interdigital magnetron
US2579630A (en) * 1947-07-30 1951-12-25 Patelhold Patentverwertung Microwave generator
US2609522A (en) * 1950-04-03 1952-09-02 Joseph F Hull Magnetron
US2632868A (en) * 1950-04-03 1953-03-24 Joseph F Hull Magnetron
US2635211A (en) * 1946-03-05 1953-04-14 Franzo H Crawford Tunable magnetron

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE699011C (de) * 1936-04-30 1940-11-21 Telefunken Gmbh Schlitzmagnetronanordnung zur Erzeugung kurzer Wellen

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2478644A (en) * 1943-10-23 1949-08-09 Raytheon Mfg Co Electrical discharge device of the magnetron type
US2500430A (en) * 1944-07-28 1950-03-14 Bell Telephone Labor Inc Cavity resonator oscillator device
US2635211A (en) * 1946-03-05 1953-04-14 Franzo H Crawford Tunable magnetron
US2579630A (en) * 1947-07-30 1951-12-25 Patelhold Patentverwertung Microwave generator
US2578569A (en) * 1949-12-09 1951-12-11 Sylvania Electric Prod Variable-frequency interdigital magnetron
US2609522A (en) * 1950-04-03 1952-09-02 Joseph F Hull Magnetron
US2632868A (en) * 1950-04-03 1953-03-24 Joseph F Hull Magnetron

Also Published As

Publication number Publication date
DE924576C (de) 1955-03-03
CH306182A (de) 1955-03-31
FR1090790A (fr) 1955-04-04

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