US2247077A - High frequency electronic apparatus - Google Patents

High frequency electronic apparatus Download PDF

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Publication number
US2247077A
US2247077A US348006A US34800640A US2247077A US 2247077 A US2247077 A US 2247077A US 348006 A US348006 A US 348006A US 34800640 A US34800640 A US 34800640A US 2247077 A US2247077 A US 2247077A
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US
United States
Prior art keywords
space charge
elements
anode structure
wave
magnetic field
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
US348006A
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English (en)
Inventor
John P Blewett
Ramo Simon
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.)
General Electric Co
Original Assignee
General Electric 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
Priority to BE446912D priority Critical patent/BE446912A/xx
Application filed by General Electric Co filed Critical General Electric Co
Priority to US348006A priority patent/US2247077A/en
Application granted granted Critical
Publication of US2247077A publication Critical patent/US2247077A/en
Priority to DEA8011D priority patent/DE908046C/de
Priority to FR875398D priority patent/FR875398A/fr
Priority to GB9580/41A priority patent/GB550081A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01J25/50—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
    • 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
    • H01J25/58—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 a number of resonators; having a composite resonator, e.g. a helix

Definitions

  • the present invention relates to electronic apparatus for application at high frequencies and makes use of the special properties of a region filled with a space charge which is caused to rotate by the combined action of a uniform magnetic field and a radial electric field.
  • the product AH (in which A represents the free space wave length of the particular wave being generated" and H represents the magnetic field required to produce such wave length) is very much decreased from the values required for lower order waves.
  • the fol lowing table represents the nature of this change for a particular kind of operating system.
  • a particular arrangement which has been found effective to produce higher order waves includes a hollow cage-like anode structure within which a rotating space charge is produced.
  • the anode structure is made up of several (at least six) mutually spaced vane-like elements which act to stimulate the space charge in the desired manner.
  • Fig. 1 is a side view in partial section of an apparatus'suitably embodying the invention
  • Fig. 2 is a transverse sectional view taken on line 3-2 of Fig. 1
  • Figs. 3 and 4 represent modified forms of electronic device suitable for use in the apparatus of Fig. 1
  • Figs. 5 and 6 conjointly illustrate an alternative embodiment of the invention.
  • Fig. 1 there is shown an elongated evacuated envelope it, consisting of glass or the like.
  • an electron source in the form of a filamentary cathode M which is supported and supplied with current by means of lead-in conductors it and i3 sealed into the ends of the envolope.
  • Aeoiled spring M connected to one extremity of the filament ll serves to maintain the filament under tension.
  • Surrounding the filament and generally coaxelements shall be in the shape of thin strips or vanes having their major surfaces lying in radial planes and defining elongated gaps between them.
  • the spacing between adjacent conductive elements is, as appears in the drawings, greater than the thickness of the elements so that the resulting structure comprises a relatively open cagelike arrangement.
  • each pair of elements may be assumed to constitute a half wave line which is short-circuitecl at its extremities, and for present purposes the length of the line should be correlated to the desired operating frequency of the apparatus as a whole.
  • a conductive shield or tank which serves dually as a means for preventing free radiation from the electronic system and as a resonator for assisting the generation of high frequency waves within the interior of the tank.
  • an appropriate voltage source which is illustrated diagrammatlcal ly in Fig. 1 as a battery til.
  • a portion of the battery 28 is used to supply heating current to the filament ii, and the high voltage terminals of the battery are connected between the filament lead-in conductor i3 andan anode lead-in conductor 29, the circuit to the latter conductor being completed through the grounded wall of the tank it.
  • a radial electric field is created between the cathode filament ii and the surrounding anode structure.
  • This field in connection with the uniform magnetic field produced by the coils 2t and 25, serves to create within the confines of the anode structure a rotating space charge which is maintained by means of electrons emitted from the cathode.
  • the sharply defined discontinuities provided in proximity to the space charge by the presence of the thin vanes i6 stimulate or excite the space charge in such fashion as to assure the generation therein of circumferentially propagated waves of a higher order than unity, the nature of wave generation being determined at least in part by the number of vanes employed.
  • the waves thus developed excite the 'half' wave transmission being confined to the region within the tank 2i, tends to maintain the space within the tank also in an excited condition, and if 'these various components are properly matched in an electrical sense, the whole system may produce sustained high frequency oscillations.
  • Power may be taken from the system for external utilization by suitable coupling means either of inductive or capacitive character.
  • the particular coupling means illustrated comprises a conductive'loop 32 arranged coaxially about the device it) and having one of its terminals (the terminal 33) connected directly to the wall of the tank 2! (see Fig. 2).
  • the other terminal 3% of the coupling loop becomes the inner conductor of a coaxial element transmission line having as an outer conductor ametal tube 35 which extends. outwardly from the wall of the tank.
  • a particular advantage of the apparatus above described lies in the fact that the effects described may be obtainedby the use of a much weaker magnetic field than has heretofore been required for the successful operation of devices in the magnetron class.
  • the electronic structure employed is of such character as to facilitate or assure the production of higher order waves within the rotating space charge. It has so far proven possible to obtain oscillations of a wave length on the order of 10 centimeters with a magnetic field strength as low as 300 gauss, this being a reduction on the order oi 5 to 1 below the values indicated as necessary by experiments with previously available magnetron devices.
  • the electronic device includes, in common with the device in Fig. 1, an evacuated envelope ii] having a filamentary cathode ti ex-' tending axially thereof.
  • the vane elements 63 which make up the anode structure are open-circuited at their extremities, being conductively connected at their central portions, however, by means of a metallic ring M.
  • the opposed halves of adjacent vanes tend to perform as cooperating elements of a quarter wave transmission line which is short-circuited at one end (i. e. by the ring ti t) and open-circuited at the other.
  • the length of the vanes should, accordingly, be fixed with this consideration in mind.
  • FIG. 4 Another structural change which may be made without affecting the fundamental principles of operation of the apparatus pertains to the means employed for creating a space charge and is exemplified by the arrangement of Fig. 4. As in the construction previously described, the operative elements of the device are enclosed within a sealed envelope (identified in this case by the numeral 50). In the new arrangement, however,
  • the longitudinally extending filament previously described lsr'eplaced by a n electron source an l ranged at one end-of the-envelope. This includes ity closed by means of a metal wall 52 which is coated with an appropriate emitting substance, such as alkaline earth material.
  • a heater 58 which is positioned within the cathode and which is energized by means of a heating battery M,
  • means are provided for so regulating the electric field distribution as to obtain this result.
  • Such means comprises two pair oi partially acter are known to the art, and, since they form no part of our present invention, will not be discussed in detail herein.
  • the device of Fig. i may be substituted in the apparatus of Fig. 1 without changing the functioning oi the apparatus.
  • an evacuated enclosing envelope it which contains an axially extending filamentary cathode ll.
  • anode structure which includes a number of vane-like elements it (see Fig. 6) which have relatively great extension in the radial direction and which ,define wedge-shaped spaces between them.
  • the extremities of the vane-like elements. are conductively connected by means of annular disks it and it which completely close-the ends of the gaps between the elements.
  • the outward openings of these gaps (with the exception of a I single gap) are additionally closed by means of a metallic cylindrical member ll which extends around the outer contour of the anode structure.
  • This member is provided with an axially extending opening it which is coextensive with the gap between one pair of adjacent varies and which permits the space between such vanes to be freely externally exposed.
  • the cathode ll is appropriately energized and is maintained at a negative potential with respect to the anode structure by means 01' a suitable voltage source (not shown).
  • which are respectively positioned about the ends of the envelope 10, provide a uniform axial magnetic field for causing rotation of the space charge developed about the cathode ii.
  • vanes 13' are quite similar to the vanes i6 scribed, adjacent vanes serve. by virtue of their distributed constants, as resonant structures adapted to be maintained in excited condition by reaction with the space charge. The whole system is, therefore, suitable for the creation and maintenance of high frequency oscillations.
  • Electronic apparatus comprising the combination of a plurality of thin-edged elongated conductive elements which are arranged to form a hollow cage-like structure and which are mutually spaced to provide sharply defined gaps between them, means for directly conductlvely connecting the various elements to assure the functioning of adjacent elements as components of a standing wave system, means for providing electrons axially of the anode structure to produce space charge within the structure, and means for producing a magnetic field axiallyof the structure to cause rotation of the said,- space charge and to facilitate production therein of circumferentially propagated waves.
  • Electronic apparatus comprising the combination of a hollow cylindrical anode structure constituted of at least six elongated vane-like members having their major surfaces in radial planes, said vane-like members being mutually spaced to provide gaps between them, means for directly conductively connecting the various elements to assure the functioning of adjacent ele ments as components of a standing wave system, means for providing electrons axially of the anode structure to produce space charge within the structure, and means for producing a magnetic field axially of the structure to cause rotation of the said space charge and to facilitate production therein of circumferentially propagated waves.
  • Electronic apparatus comprising the combination of a hollow. cylindrical anode structure constituted of at least six conductive vane-like elements which are circumferentially spaced to provide gaps between them, means for connecting the various elements to assure the functioning of adjacent elements as components of a standing wave system, means for providing electrons within the anode structure to produce space charge therein, means for producing a magnetic field axially of the structure to cause rotation of the said space charge and to facilitate production therein of circumferentially propagated waves, and means for preventing undesired radiation of wave energy from the structure except through the gap existing between a selected pair of vanes.
  • Electronic apparatus comprising the combination of at least six elongated vane-like members grouped about a common axis to form a hollow cylindrical anode structure, said vanelike members being mutually ,spaced to provide gaps between them and having their major surfaces in radial planes, means for conductively connecting the extremities of the various elements 'so as substantially to'close the ends of for providing electrons within the anode structure to produce space charge therein, and means for producing a magnetic field axially of the structure to cause rotation of the said space charge and to facilitate production therein of circumferentially propagated waves, there being an opening in the surface of the said shield to permit radiation therethrough of wave-energy generated within said anode structure.
  • Electronic apparatus comprising the combination of at least sixelongated vane-like members grouped about a common axis to form a a faces in radial planes, means connecting the extremities of the said member so as substantially to close the ends of the anode structure, a cylindrical shield in contact with the outer edges of the said vane-like members and enclosing the anode structure, means for providing electrons within the anode structure to produce space charge therein, and means for producing a magnetic field axially of the structure to cause rotation ofthe said space charge and to facilitate production therein of circumferentially propagated waves, there being an opening in the said,- cylindrical shield which is substantially coextensive withthe gap between one pair of adjacent" vanes to permit the radiation therethrough of wave-energy developed within the anode structure.
  • Electronic apparatus comprising the combination of a hollow cylindrical anode structure constituted of at least six conductive elements which are circumferentially spaced to provide. gaps between them, the spacing between adjacent elements being at least as great asthe thickness of the elements, means for connecting the various elements to assure the functioning of adjacent elements as components of a standing wave system, means for providing electrons within the anode structure to produce a space charge therein, means for producing a mag netic field axially of the structure to cause rotation of the said space charge and to facilitate production therein of circumferentlally propagated waves, and shielding means for preventing undesired radiation of wave-energy from the structure.
  • Electronic apparatus comprising the combination of a hollow cylindrical anode structure constituted of at least six 'circumferentially spaced vane-like elements consisting of conductive material, the major surfaces of the various elements being in radial planes so that adjacent elements define wedge-shaped spaces between them, means for connecting the various elements to assure the functioning of adjacent elements as components of a standing wave system, means for providing electrons within the anode structure, to produce a space charge therein, means for producing a magnetic field axially of the structure to cause rotation of the said space charge and to facilitate production therein of circumferentially propagated waves, and conductive shielding means extending between the outer edges of at least certain ones of the vanethe anode structure, a cylindrical shield 'perimetrically enclosing the anode structure, means like elements for preventing undesired radiation of wave energy through the openings between I I

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US348006A 1940-07-27 1940-07-27 High frequency electronic apparatus Expired - Lifetime US2247077A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BE446912D BE446912A (de) 1940-07-27
US348006A US2247077A (en) 1940-07-27 1940-07-27 High frequency electronic apparatus
DEA8011D DE908046C (de) 1940-07-27 1941-07-12 Magnetfeldroehre
FR875398D FR875398A (fr) 1940-07-27 1941-07-25 Nouveau tube électronique pour très hautes fréquences
GB9580/41A GB550081A (en) 1940-07-27 1941-07-28 Improvements in and relating to high frequency electronic apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US348006A US2247077A (en) 1940-07-27 1940-07-27 High frequency electronic apparatus

Publications (1)

Publication Number Publication Date
US2247077A true US2247077A (en) 1941-06-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
US348006A Expired - Lifetime US2247077A (en) 1940-07-27 1940-07-27 High frequency electronic apparatus

Country Status (5)

Country Link
US (1) US2247077A (de)
BE (1) BE446912A (de)
DE (1) DE908046C (de)
FR (1) FR875398A (de)
GB (1) GB550081A (de)

Cited By (52)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2419172A (en) * 1943-11-19 1947-04-15 Rca Corp Electron discharge device having coupled coaxial line resonators
US2421912A (en) * 1944-02-16 1947-06-10 Rca Corp Electron discharge device of the cavity resonator type
US2423161A (en) * 1945-03-21 1947-07-01 Raytheon Mfg Co Electron discharge device of the plural cavity resonator type
US2428612A (en) * 1942-05-09 1947-10-07 Gen Electric Magnetron
US2432827A (en) * 1943-02-11 1947-12-16 Raytheon Mfg Co High efficiency magnetron
US2434517A (en) * 1944-05-11 1948-01-13 Westinghouse Electric Corp Method of activating cathodes
US2435804A (en) * 1944-01-01 1948-02-10 Rca Corp Cavity resonator magnetron device
US2443179A (en) * 1941-06-24 1948-06-15 Submarine Signal Co Electrical apparatus
US2444419A (en) * 1942-12-24 1948-07-06 Gen Electric Magnetron
US2445447A (en) * 1943-02-06 1948-07-20 Rca Corp Electron discharge device utilizing cavity resonators
US2446825A (en) * 1942-12-31 1948-08-10 Gen Electric Ultra high frequency electric discharge device
US2446826A (en) * 1943-04-14 1948-08-10 Gen Electric Magnetron
US2447537A (en) * 1944-01-10 1948-08-24 Bell Telephone Labor Inc Coupled cavity resonator
US2452077A (en) * 1944-01-19 1948-10-26 Raytheon Mfg Co Electric discharge device
US2452272A (en) * 1944-10-28 1948-10-26 Philco Corp Magnetron
US2452032A (en) * 1944-06-10 1948-10-26 Raytheon Mfg Co Electron discharge device of the magnetron type
US2468243A (en) * 1945-05-07 1949-04-26 Raytheon Mfg Co Electron discharge device
US2473399A (en) * 1945-03-27 1949-06-14 Raytheon Mfg Co Electron discharge device of the magnetron type
US2473547A (en) * 1945-09-28 1949-06-21 Raytheon Mfg Co Electron discharge device
US2473828A (en) * 1943-11-15 1949-06-21 Raytheon Mfg Co Electron discharge device of the magnetron type
US2474938A (en) * 1944-09-12 1949-07-05 Raytheon Mfg Co Cavity resonator electron discharge device
US2474898A (en) * 1944-04-05 1949-07-05 Bell Telephone Labor Inc Electromagnetic resonator of the magnetron type
US2475960A (en) * 1943-08-25 1949-07-12 Rca Corp Electron discharge device
US2480126A (en) * 1945-12-14 1949-08-30 Standard Telephones Cables Ltd Electron discharge device
US2481151A (en) * 1944-04-13 1949-09-06 Raytheon Mfg Co Electron discharge device
US2489131A (en) * 1943-11-17 1949-11-22 Rca Corp Electron discharge device of the cavity resonator type
US2493661A (en) * 1947-03-15 1950-01-03 Philips Lab Inc Magnetron cavity structure and method of manufacture of same
US2500430A (en) * 1944-07-28 1950-03-14 Bell Telephone Labor Inc Cavity resonator oscillator device
US2521556A (en) * 1946-11-20 1950-09-05 Gen Electric Magnetron
US2520955A (en) * 1942-10-01 1950-09-05 Westinghouse Electric Corp Trapezoidal cavity magnetron
US2538597A (en) * 1946-06-18 1951-01-16 Westinghouse Electric Corp Magnetron
US2539337A (en) * 1945-03-07 1951-01-23 Raytheon Mfg Co Electron discharge device of the magnetron type
US2546870A (en) * 1941-10-03 1951-03-27 English Electric Valve Co Ltd High-frequency electrical oscillator
US2548808A (en) * 1945-11-06 1951-04-10 Nathan P Nichols Continuous-strip anode for magnetrons
US2551614A (en) * 1946-08-31 1951-05-08 Standard Telephones Cables Ltd Tunable magnetron
US2565387A (en) * 1946-10-31 1951-08-21 Sylvania Electric Prod Interdigital magnetron
US2590612A (en) * 1944-07-25 1952-03-25 Rca Corp High-frequency electron discharge device and circuits therefor
US2592408A (en) * 1945-04-18 1952-04-08 Rca Corp Electron discharge device
US2611110A (en) * 1944-04-19 1952-09-16 Raytheon Mfg Co Electronic discharge device of the cavity resonator type
US2616063A (en) * 1942-04-09 1952-10-28 M O Valve Co Ltd Magnetron
US2617966A (en) * 1947-02-19 1952-11-11 Rca Corp Magnetron
US2635210A (en) * 1946-03-01 1953-04-14 Millman Sidney Magnetron
US2639407A (en) * 1946-04-09 1953-05-19 Us Sec War Closed end magnetron
US2655616A (en) * 1944-05-24 1953-10-13 English Electric Valve Co Ltd Magnetron
US2660667A (en) * 1943-02-23 1953-11-24 Bell Telephone Labor Inc Ultrahigh frequency resonator
US2666869A (en) * 1946-06-21 1954-01-19 Albert M Clogston Magnetron output coupling system
US2680827A (en) * 1941-12-17 1954-06-08 English Electric Valve Co Ltd Means for transferring power to and from magnetrons
US2685046A (en) * 1949-11-01 1954-07-27 Rca Corp Magnetron
US2756709A (en) * 1946-04-02 1956-07-31 Jr Lew G Coonrod Jig for vane-type magnetrons
US2768327A (en) * 1946-03-11 1956-10-23 Millman Sidney Wave guide output circuit for a magnetron
US2933643A (en) * 1954-03-25 1960-04-19 M O Valve Co Ltd Travelling wave magnetrons
US3353053A (en) * 1963-03-28 1967-11-14 Bott Ian Bernard Radiation generator operating in the millimeter and submillimeter wavelength range

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE954343C (de) * 1942-10-16 1956-12-13 Elektronik Ges Mit Beschraenkt Magnetfeldroehre zur Erzeugung ultrakurzer Schwingungen
DE926083C (de) * 1943-04-20 1955-04-07 Fritz Dr-Ing Borgnis Anordnung zur Erzeugung oder zum Empfang kurzer elektrischer Wellen
DE930269C (de) * 1944-06-30 1955-07-14 Blaupunkt Elektronik G M B H Vielschlitzmagnetfeldroehre mit einer an die Anodensegmente angekoppelten Lecherleitung als Schwingungssystem
US2463524A (en) * 1945-03-10 1949-03-08 Raytheon Mfg Co Electron discharge device

Cited By (52)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2443179A (en) * 1941-06-24 1948-06-15 Submarine Signal Co Electrical apparatus
US2546870A (en) * 1941-10-03 1951-03-27 English Electric Valve Co Ltd High-frequency electrical oscillator
US2680827A (en) * 1941-12-17 1954-06-08 English Electric Valve Co Ltd Means for transferring power to and from magnetrons
US2616063A (en) * 1942-04-09 1952-10-28 M O Valve Co Ltd Magnetron
US2428612A (en) * 1942-05-09 1947-10-07 Gen Electric Magnetron
US2520955A (en) * 1942-10-01 1950-09-05 Westinghouse Electric Corp Trapezoidal cavity magnetron
US2444419A (en) * 1942-12-24 1948-07-06 Gen Electric Magnetron
US2446825A (en) * 1942-12-31 1948-08-10 Gen Electric Ultra high frequency electric discharge device
US2445447A (en) * 1943-02-06 1948-07-20 Rca Corp Electron discharge device utilizing cavity resonators
US2432827A (en) * 1943-02-11 1947-12-16 Raytheon Mfg Co High efficiency magnetron
US2660667A (en) * 1943-02-23 1953-11-24 Bell Telephone Labor Inc Ultrahigh frequency resonator
US2446826A (en) * 1943-04-14 1948-08-10 Gen Electric Magnetron
US2475960A (en) * 1943-08-25 1949-07-12 Rca Corp Electron discharge device
US2473828A (en) * 1943-11-15 1949-06-21 Raytheon Mfg Co Electron discharge device of the magnetron type
US2489131A (en) * 1943-11-17 1949-11-22 Rca Corp Electron discharge device of the cavity resonator type
US2419172A (en) * 1943-11-19 1947-04-15 Rca Corp Electron discharge device having coupled coaxial line resonators
US2435804A (en) * 1944-01-01 1948-02-10 Rca Corp Cavity resonator magnetron device
US2447537A (en) * 1944-01-10 1948-08-24 Bell Telephone Labor Inc Coupled cavity resonator
US2452077A (en) * 1944-01-19 1948-10-26 Raytheon Mfg Co Electric discharge device
US2421912A (en) * 1944-02-16 1947-06-10 Rca Corp Electron discharge device of the cavity resonator type
US2474898A (en) * 1944-04-05 1949-07-05 Bell Telephone Labor Inc Electromagnetic resonator of the magnetron type
US2481151A (en) * 1944-04-13 1949-09-06 Raytheon Mfg Co Electron discharge device
US2611110A (en) * 1944-04-19 1952-09-16 Raytheon Mfg Co Electronic discharge device of the cavity resonator type
US2434517A (en) * 1944-05-11 1948-01-13 Westinghouse Electric Corp Method of activating cathodes
US2655616A (en) * 1944-05-24 1953-10-13 English Electric Valve Co Ltd Magnetron
US2452032A (en) * 1944-06-10 1948-10-26 Raytheon Mfg Co Electron discharge device of the magnetron type
US2590612A (en) * 1944-07-25 1952-03-25 Rca Corp High-frequency electron discharge device and circuits therefor
US2500430A (en) * 1944-07-28 1950-03-14 Bell Telephone Labor Inc Cavity resonator oscillator device
US2474938A (en) * 1944-09-12 1949-07-05 Raytheon Mfg Co Cavity resonator electron discharge device
US2452272A (en) * 1944-10-28 1948-10-26 Philco Corp Magnetron
US2539337A (en) * 1945-03-07 1951-01-23 Raytheon Mfg Co Electron discharge device of the magnetron type
US2423161A (en) * 1945-03-21 1947-07-01 Raytheon Mfg Co Electron discharge device of the plural cavity resonator type
US2473399A (en) * 1945-03-27 1949-06-14 Raytheon Mfg Co Electron discharge device of the magnetron type
US2592408A (en) * 1945-04-18 1952-04-08 Rca Corp Electron discharge device
US2468243A (en) * 1945-05-07 1949-04-26 Raytheon Mfg Co Electron discharge device
US2473547A (en) * 1945-09-28 1949-06-21 Raytheon Mfg Co Electron discharge device
US2548808A (en) * 1945-11-06 1951-04-10 Nathan P Nichols Continuous-strip anode for magnetrons
US2480126A (en) * 1945-12-14 1949-08-30 Standard Telephones Cables Ltd Electron discharge device
US2635210A (en) * 1946-03-01 1953-04-14 Millman Sidney Magnetron
US2768327A (en) * 1946-03-11 1956-10-23 Millman Sidney Wave guide output circuit for a magnetron
US2756709A (en) * 1946-04-02 1956-07-31 Jr Lew G Coonrod Jig for vane-type magnetrons
US2639407A (en) * 1946-04-09 1953-05-19 Us Sec War Closed end magnetron
US2538597A (en) * 1946-06-18 1951-01-16 Westinghouse Electric Corp Magnetron
US2666869A (en) * 1946-06-21 1954-01-19 Albert M Clogston Magnetron output coupling system
US2551614A (en) * 1946-08-31 1951-05-08 Standard Telephones Cables Ltd Tunable magnetron
US2565387A (en) * 1946-10-31 1951-08-21 Sylvania Electric Prod Interdigital magnetron
US2521556A (en) * 1946-11-20 1950-09-05 Gen Electric Magnetron
US2617966A (en) * 1947-02-19 1952-11-11 Rca Corp Magnetron
US2493661A (en) * 1947-03-15 1950-01-03 Philips Lab Inc Magnetron cavity structure and method of manufacture of same
US2685046A (en) * 1949-11-01 1954-07-27 Rca Corp Magnetron
US2933643A (en) * 1954-03-25 1960-04-19 M O Valve Co Ltd Travelling wave magnetrons
US3353053A (en) * 1963-03-28 1967-11-14 Bott Ian Bernard Radiation generator operating in the millimeter and submillimeter wavelength range

Also Published As

Publication number Publication date
DE908046C (de) 1954-04-01
BE446912A (de)
FR875398A (fr) 1942-09-18
GB550081A (en) 1942-12-22

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