US2422465A - High-frequency magnetrons - Google Patents

High-frequency magnetrons Download PDF

Info

Publication number
US2422465A
US2422465A US474426A US47442643A US2422465A US 2422465 A US2422465 A US 2422465A US 474426 A US474426 A US 474426A US 47442643 A US47442643 A US 47442643A US 2422465 A US2422465 A US 2422465A
Authority
US
United States
Prior art keywords
tuning
frequency
anode structure
members
ring
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
US474426A
Other languages
English (en)
Inventor
Ralph J Bondley
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 FR954569D priority Critical patent/FR954569A/fr
Application filed by General Electric Co filed Critical General Electric Co
Priority to US474426A priority patent/US2422465A/en
Application granted granted Critical
Publication of US2422465A publication Critical patent/US2422465A/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
    • H01J23/18—Resonators
    • H01J23/20—Cavity resonators; Adjustment or tuning thereof
    • H01J23/213—Simultaneous tuning of more than one resonator, e.g. resonant cavities of a magnetron

Definitions

  • My invention relates to high frequency electric discharge devices and more particularly to ultra high frequency magnetrons of the space resonant type.
  • My invention is in the nature of an improvement over the tuning arrangement described and claimed in copending application Serial No. 465,439, of Kenneth C. De Walt, filed November 13, 1942, and this invention.
  • I provide new and improved tuning means or frequency controlling means for ultra high frequency magnetrons of the space resonant type wherein a positionable member or members are associated with the anode structure defining the space resonant cavities, and wherein a linear relationship is obtained between the opcrating frequency of the magnetron and the poassigned to the assignee of effect the desired tuning operation.
  • tun ing members which may be either of conductive material or of dielectric material and which extend into openings in the anode structure to The tuning members are inserted in the anode structure in positions or openings within which the ultra high frequency electric and magnetic fields of the various space resonant cavities are present or associated.
  • a conductive or metallic annular ring extends into an annular recess in one face of the anode structure, and the position of the ring within the structure determines the natural frequency of the space resonant cavities and consequently determines the operating frequency of the device.
  • the tuning means comprises a plurality of dielectric tuning stubs or cavities and thereby control the natural frequency of the cavities and the operating frequency of the device.
  • Fig. 1 diagrammatically illustrates an embodiment of my invention as applied to an ultra high frequency magnetron wherein the magnetic excitation therefor is provided by a pair of longitudinally spaced permanently magnetized pole pieces
  • Fig. 2 represents a cross sectional view of the anode structure including the coupling means provided for the space resonant cavities
  • Fig. 3 represents a further embodiment of my invention wherein the tuning means comprises a plurality of dielectric tuning members which extend into the space resonant regions and are supported by a ring construction, the details of which are shown in Figs. 4 and 5.
  • FIG. 1 of the accompanying drawing Ihave there illustrated my invention as applied to an ultra high frequency magnetron of the space resonant type.
  • the magnetron shown in Fig. 1 comprises a lateral wall structure provided by a single metal tube I consisting of ferromagnetic material such members which extend into the ically sealed to the or electrode sections of the container are closed by flanged members weldedor otherwise hermetinner surface of tube I.
  • anode structure 4 which is shown in plan view in Fig. 2*.
  • the anode structure 4 is preferably constructed 2 and 3 which are of a conductive non-magnetic material; such as copper, and is provided with an enlarged central opening which surrounds a cathode structure to and which comprises an conductor-01a concentric transmission line 23 comprising an inner conductor 2i and an outer tubular conductor 22.
  • the anode structure 4 preferably consists of copper and is supported, as
  • Circumferentiall'y arranged or positioned 5 there is provided a number of space resonant regions or cavities which may take the'form of cylindrical openings 6-l3, inclusive, each of which is in communication with the enlarged central opening 5 through a radially extending slot 14.
  • Slots l4 define therebetween a plurality of electrode or anode sections.
  • anode structure 4 In order to receive a tuning member, I provide in one surface, that is the bottom surface, of anode structure 4 an annular channel or groove l5. member or ring l6, preferably constructed of non-magnetic material such as copper or silver, and which proj ects into groove l5 and is in spaced relation with respect to the walls thereof. Groove l5 may be located at a number ofv positions with respect to openings 6-l3 and their associated slots l4, and the relative positions illustrated in Fig. 2 are merely exemplary of one way in which these elements of the anode structure may be arranged. I have found that effective tuning or control of the operating frequency is obtained by locating the annular groove l5 within the vicinity of the junctures of cylindrical openings 6-I3 and the slots I4.
  • I provide a plurality of cou pling conductors l1 and II! which may be arranged in accordance with the patterns disclosed and claimed in my copending application, Serial No. 462,123, filed October 15, 1942, and which is assigned to the assignee of the present application.
  • these conductors are preferably arranged so that alternate metallic parts between slots M are electriaround the central opening of tube I. 'A relatively large circumferential channel 23 in the anode'structure serves to reduce the overall weight.
  • a cathode of the indirectly heated thermionic type a sleeve 24 having on the outside surface thereof a suitable electron emissive material such as barium oxide.
  • a cathode heating element 25 Within the cathode sleeve 24 there is provided a cathode heating element 25, the upper terminal of which is connected to an inner conductor of a concentric line to be described presently, and the lower terminal of which is electrically connected to the sleeve 24.
  • these members should be constructed of a magnetizable material having a high coercive force and a high energy factor.
  • a magnetizable material having a high coercive force and a high energy factor.
  • Alnico a particular class of alloys of aluminum, nickel and cobalt.
  • these pole pieces may be respectively seated upon relatively thick disk-like members 28 and.29 consisting of ferromagnetic material such as steel.
  • disk-like members 28 and.29 consisting of ferromagnetic material such as steel.
  • clamping rings'3il and 3l which are slipped over the pole pieces and; welded to the members 28 and 29.
  • conductors i'l may be I considered as connecting alternate electrode sections and conductors l8 may be considered as connecting the intervening or intermediate electrode sections.
  • This type of connection is obtained by constructing conductors i1 and iii .to span and to be physically separated from alternate electrode sections. For example, one conductor ll spans the electrode section between-m 'slots i4 associated with cylindrical openings 6 and l, and the adjacent conductor l8 spans the associated with cylindrical tends into one of the cavities, such as opening 8,
  • This supporting structure may comprise a concentric transmission line including an outer conductor 38 and an inner conductor 39, the former of which is electrically connected to a supporting collar 40 which engages the cathode sleeve 24 and the latter of which is connected to the upper terminal of the cathode heating element 25, extending through the collar 40 and insulated therefrom by means of a vitreous "insulator 4
  • Conductor 39 may extend through extension of an inner comprising the cylinder 24 and serve as a support for a shielding disk 42 which is in spaced relation with the pole face of pole piece 21 and the bottom surface of the anode structure.
  • the inner conductor 39 and the outer conductor 38 may be maintained in spaced relation with each other by means of a plurality of longitudinally spaced insulators 43.
  • the entire concentric line arrangement may be supported in a desired central position in channel 36, and maintained in the proper longitudinal alinement by means of an insulatofr u which closely engages the inner surface 9 channel 36 and the outer surface of tubular conductor 38.
  • the conductors 38 and 39 are connected to externally accessible terminals 45 and 46, the latter of which are hermetically sealed by means of a suitable vitreous seal 41 which, in turn, is sealed to a flanged collar 48 welded to the upper surface of member 2.
  • ring tuning member 16 The position of the ring tuning member 16 previously described in connection with Fig. 2 is more fully appreciated by referring to the longitudinal cross sectional view of, Fig. 1 wherein it is seen that the member or ring [6 extends into the recess .or annular groove l provided in the anode structure 4.
  • Tuning ring I6 is provided with a flanged part l6a.
  • Magnetic pole piece 21 is provided in its pole face with a transverse slot 49 adapted to receive and permit ready movement therein of a transverse supporting rod 50 which is attached to flange l6a of the tuning ring l6.
  • includes an hermetic seal which may comprise a deformable metallic bellows 53 which is not only sealed to the lower surface of end member 3 but is also sealed to rod 5
  • a metallic cap 54 surrounds the sealing bellows 53 and serves as a support for the lower extremity of rod 5
  • the coupling conductors I! and I8 may be arranged to lie within a recess 55 provided in the bottom surface of the anode structure 4 as shown in Fig. 1. If desired, a similar system or array of coupling elements may be positioned in a recess 56 in the top surface of the anode structure 4.
  • the energization or excitation of the various space resonant cavities comprising the cylindrical openings 6-l3 and the associated slots I4 is obtained by utilization of the motion of the electrons constituting the space charge which is effected or established between the outer surface of cathode sleeve 24 and the surfaces of the electrode sections between the slots l4.
  • the electrons constituting the space charge will be given a helical or spiral motion undergoing oscillations or gyrations to excite the various space resonant cavities at the desired frequencies.
  • Electromagnetic energy is derived from the cavities by means of loop I 9 and concentric transmission line and is supplied to an external utilization circuit.
  • the control of the natural frequencies of the space resonant cavities and hence the control of the operating frequency of the device is, obtained by the longitudinal position of the tuning ring I6.
  • the operating frequency of the device is decreased. This feature of operation may be considered as occurring due to the increase of the capacitance effect of the tuning ring as a greater effective surface thereof is positioned in annular groove I5. .Of course, in a system of this nature wherein both magnetic and electric fields are present, the net effect of such a tuning ring cannot properly be described as being solely electric or solely magnetic.
  • Fig. 3 is a partial cross sectional view of an electric discharge device built in accordance with my invention and many of the elements therein correspond to elements shown in Fig. 1, corresponding elements being assigned like reference numerals.
  • I provide a plurality of dielectric tuning members, only two of which, 51 and 58, are shown in Fig. 3, and which are preferably constructed of a low loss dielectric material such as quartz. These tuning members are spaced annularly or circumferentially and extend into the cylindrical openings 6-l3 of the space resonant cavities.
  • Transverse rod 50 supports an annular member or ring 59 provided with circumferentially spaced apertures 60 adapted to receive restricted ends of the dielectric tuning members.
  • Fig. 4 is a plan view showing the associated anode structure, ring 59 and the manner in which the tuning members are held in position on the ring.
  • each member is shown as being provided with a shoulder 6
  • the spring clip means may be arranged as shown in Fig. 5 wherein a single ring serves to engage a pair of adjacent dielectric tuning members and a plurality of such spring means may be employed as shown in Fig. 4.
  • the members may be readily inserted through the apertures 60 and will upon insertion deflect the spring means 63 sufi'iciently to permit the proper seating of the tunin members on the upper surface of the ring 59, whereupon the ends of spring means 63 will enter the annular recesses 62.
  • magnetrons built in accordance with my invention is the substantially linear frequency change withrespect to the position of the tuning elements or the distances the tuning elements are moved; Furthermore, I have found that the tuning or frequency control is highly effective on completely coupled or strapped anode structures.
  • the tuning or frequency control of ultra high frequency magnetrons built in accordance with my invention is not critical; that is, a reasonable amount of mechanical motion produces a useful frequency change.
  • the above described types of frequency control are readily applicable to'those arrangements where it is desired to provide, externally accessible means for controlling the frequency determining means.
  • An ultra high frequency electric discharge device of the magnetron type comprising a plurality of cooperating electrodes-including a cathode and an'annular anode structure having a central opening through which'said cathode extends and providing a plurality of cavity resonators, a pair of magnetic pole pieces longitudinally displaced from said anode structure and each having therein a longitudinal channel, means mounted in the channel of one pole piece supporting said cathode and constituting a heating current lead, an adjustable tuning member extending into said anode structure, means defining a transverse slot in the pole face of the other pole piece, a transverse rod supporting said tuning member and positioned in the transverse slot in the face of said other pole piece, and means supporting said transverse rod and said tuning member comprising a longitudinal rod located within the channel of said other pole piece.
  • An ultra high frequency electric discharge device of the magnetron type comprising a plurality of cooperating electrodes including a cathode and an annular anode structure having a central opening through which said cathode extends and providing a plurality of cavity resonators, a pair of magnetic pole pieces longitudinally displaced from said anode structure and each having therein a longitudinal channel, means mounted in the channel of one pole piece supporting said cathodeand constituting a heating current lead, an adjustable tuning member extending into saidanode structure, means defining; a transverse slot in the pole face of the other pole piece, means supporting said tuning member comprising a rod located in the slot of the other pole piece, and externally accessible control means positioning said rod and said member.
  • An ultra high frequency electric discharge device of the magnetron type comprising a plurality of cooperating electrodes including a cath- 4 ode and an annular anode structure having a central opening through which said cathode extends providing a plurality of cavity resonators.
  • a pair of magnetic pole pieces longitudinally displaced from said anode structure and each havin therein a longitudinal channel means mounted in the channel of one pole piece supporting said cathode and constituting a heating current lead, means for controlling operating frequency of said device comprising a plurality of dielectric tuning members which extend into each of said cavity resonators, a member supporting and positioning said dielectric tuning members, means adjustably supporting and positioning said member and said tuning members comprising a longitudinal rod in the channel of the other pole piece, and externally accessible actuating means controlling the position of said rod.
  • An electric discharge device of the magnetron type including a plurality of cooperating electrodes including an anode structure having a plurality of circumferentially spaced anode sections extending radially inwardly and terminating short of the center of said structure and defining a central opening in said structure, said sections also defining between said sections a plurality of circumferentially disposed cavity resonators communicating with said opening, a generally annular channel having substantially depth formed in said anode structure near the inner ends of said sections, a cylindrical tuning member having substantial length extending a variable distance lengthwise into said channel whereby a substantially variable portion of the surface of said tuning member is juxtaposed to a corresponding portion of the surface of said channel, and means attached to said tuning member for moving said tuning member variable distances into said channel whereby the tuning effect of said tuning member may be varied in generally linear relation to the distance which said member extends into said channel.

Landscapes

  • Microwave Tubes (AREA)
US474426A 1943-02-02 1943-02-02 High-frequency magnetrons Expired - Lifetime US2422465A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR954569D FR954569A (en, 2012) 1943-02-02
US474426A US2422465A (en) 1943-02-02 1943-02-02 High-frequency magnetrons

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US474426A US2422465A (en) 1943-02-02 1943-02-02 High-frequency magnetrons

Publications (1)

Publication Number Publication Date
US2422465A true US2422465A (en) 1947-06-17

Family

ID=23883483

Family Applications (1)

Application Number Title Priority Date Filing Date
US474426A Expired - Lifetime US2422465A (en) 1943-02-02 1943-02-02 High-frequency magnetrons

Country Status (2)

Country Link
US (1) US2422465A (en, 2012)
FR (1) FR954569A (en, 2012)

Cited By (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2432827A (en) * 1943-02-11 1947-12-16 Raytheon Mfg Co High efficiency magnetron
US2449794A (en) * 1944-10-12 1948-09-21 Westinghouse Electric Corp Electron discharge device
US2450023A (en) * 1943-11-15 1948-09-28 Raytheon Mfg Co Electron discharge device of the magnetron type
US2450619A (en) * 1945-10-19 1948-10-05 Sonkin Simon Tunable magnetron
US2452078A (en) * 1944-05-24 1948-10-26 Raytheon Mfg Co Thermally tunable electron discharge device
US2459030A (en) * 1945-03-07 1949-01-11 Bell Telephone Labor Inc Tunable magnetron
US2473399A (en) * 1945-03-27 1949-06-14 Raytheon Mfg Co Electron discharge device of the magnetron type
US2477317A (en) * 1945-03-21 1949-07-26 Raytheon Mfg Co Electron discharge device
US2478534A (en) * 1944-12-13 1949-08-09 Raytheon Mfg Co Electron discharge device of the cavity resonator type
US2480462A (en) * 1944-01-07 1949-08-30 Western Electric Co Tunable magnetron
US2501152A (en) * 1946-09-05 1950-03-21 Raytheon Mfg Co Tunable magnetron
US2504187A (en) * 1946-05-02 1950-04-18 Raytheon Mfg Co Electron discharge device
US2504329A (en) * 1944-04-05 1950-04-18 Bell Telephone Labor Inc Oscillation damping device
US2506955A (en) * 1945-05-14 1950-05-09 Bell Telephone Labor Inc Tunable high-frequency circuits
US2508576A (en) * 1945-11-09 1950-05-23 Us Sec War Tunable magnetron
US2509265A (en) * 1947-08-13 1950-05-30 Rca Corp Tunable cavity resonator magnetron
US2512901A (en) * 1945-11-01 1950-06-27 Charles V Litton Adjustable magnetron
US2519826A (en) * 1945-04-30 1950-08-22 Raytheon Mfg Co Electron discharge device
US2523049A (en) * 1945-06-23 1950-09-19 Gen Electric Water-cooled multicircuit magnetron
US2530185A (en) * 1944-11-04 1950-11-14 Westinghouse Electric Corp Electron discharge device
US2542908A (en) * 1945-04-04 1951-02-20 Raytheon Mfg Co Mechanical tuner for cavity resonators
US2566478A (en) * 1945-04-06 1951-09-04 Raytheon Mfg Co Tunable magnetron
US2589885A (en) * 1945-10-19 1952-03-18 Us Sec War Tunable magnetron
US2595652A (en) * 1944-04-05 1952-05-06 Bell Telephone Labor Inc Coupled cavity resonator
US2615143A (en) * 1946-07-17 1952-10-21 Raytheon Mfg Co Magnetron electron discharge device
US2615156A (en) * 1948-02-14 1952-10-21 Rca Corp Frequency modulation of electron discharge devices
US2621311A (en) * 1947-12-26 1952-12-09 Raytheon Mfg Co Mechanical movement
US2623198A (en) * 1946-05-13 1952-12-23 Bell Telephone Labor Inc Tunable magnetron
US2624861A (en) * 1945-03-19 1953-01-06 Raytheon Mfg Co Electron discharge device of the magnetron type
US2625669A (en) * 1947-02-01 1953-01-13 Raytheon Mfg Co Electron discharge device
US2629068A (en) * 1949-10-06 1953-02-17 Raytheon Mfg Co Tunable magnetron device
US2632231A (en) * 1947-05-27 1953-03-24 Raytheon Mfg Co Manufacture of electron-discharge devices
US2639406A (en) * 1946-01-03 1953-05-19 Us Sec War Tunable magnetron tube
US2651738A (en) * 1951-07-12 1953-09-08 Univ Ohio State Res Found Wide range inductively-tuned oscillator
US2655616A (en) * 1944-05-24 1953-10-13 English Electric Valve Co Ltd Magnetron
US2693545A (en) * 1947-08-05 1954-11-02 Eitel Mccullough Inc Electron tube structure
US2719240A (en) * 1946-03-14 1955-09-27 Laurence R Walker Cathode structure
US2834916A (en) * 1956-08-28 1958-05-13 Bomac Lab Inc Tuning member for tunable magnetron devices
US2851633A (en) * 1951-06-07 1958-09-09 Csf Multi-cavity resonant circuits
US3343031A (en) * 1963-12-21 1967-09-19 Philips Corp Tunable electronic tube
US3513516A (en) * 1965-03-16 1970-05-26 Signalite Inc Adjustable electrode spark gap assembly
WO1998015968A1 (fr) * 1996-10-04 1998-04-16 Thomson Tubes Electroniques Dispositif d'accord en frequence rapide pour tube hyperfrequence et tube hyperfrequence equipe de ce dispositif

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2115521A (en) * 1936-04-30 1938-04-26 Telefunken Gmbh Magnetron
US2163147A (en) * 1938-08-12 1939-06-20 Algin Corp Of America Fixation of chlorophyllian colored matter
US2163589A (en) * 1935-06-20 1939-06-27 Pintsch Julius Kg Electron tube
GB509102A (en) * 1937-10-08 1939-07-11 Electricitatsgesellschaft Sani Improvements in vacuum electric discharge apparatus
US2167201A (en) * 1935-06-28 1939-07-25 Pintsch Julius Kg Electron tube
US2233482A (en) * 1938-05-31 1941-03-04 Rca Corp Anode tank circuit oscillator
CH215600A (de) * 1938-08-12 1941-06-30 Bbc Brown Boveri & Cie Anordnung mit einer Magnetronröhre.
US2288812A (en) * 1939-09-30 1942-07-07 Rca Corp Electron discharge device
US2348986A (en) * 1940-10-24 1944-05-16 Rca Corp Resonant cavity magnetron
US2408234A (en) * 1941-11-26 1946-09-24 Raytheon Mfg Co Tunable magnetron
US2408235A (en) * 1941-12-31 1946-09-24 Raytheon Mfg Co High efficiency magnetron
US2408355A (en) * 1942-01-29 1946-09-24 Rca Corp Concentric line oscillator

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2163589A (en) * 1935-06-20 1939-06-27 Pintsch Julius Kg Electron tube
US2167201A (en) * 1935-06-28 1939-07-25 Pintsch Julius Kg Electron tube
US2115521A (en) * 1936-04-30 1938-04-26 Telefunken Gmbh Magnetron
GB509102A (en) * 1937-10-08 1939-07-11 Electricitatsgesellschaft Sani Improvements in vacuum electric discharge apparatus
US2233482A (en) * 1938-05-31 1941-03-04 Rca Corp Anode tank circuit oscillator
US2163147A (en) * 1938-08-12 1939-06-20 Algin Corp Of America Fixation of chlorophyllian colored matter
CH215600A (de) * 1938-08-12 1941-06-30 Bbc Brown Boveri & Cie Anordnung mit einer Magnetronröhre.
US2288812A (en) * 1939-09-30 1942-07-07 Rca Corp Electron discharge device
US2348986A (en) * 1940-10-24 1944-05-16 Rca Corp Resonant cavity magnetron
US2408234A (en) * 1941-11-26 1946-09-24 Raytheon Mfg Co Tunable magnetron
US2408235A (en) * 1941-12-31 1946-09-24 Raytheon Mfg Co High efficiency magnetron
US2408355A (en) * 1942-01-29 1946-09-24 Rca Corp Concentric line oscillator

Cited By (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2432827A (en) * 1943-02-11 1947-12-16 Raytheon Mfg Co High efficiency magnetron
US2450023A (en) * 1943-11-15 1948-09-28 Raytheon Mfg Co Electron discharge device of the magnetron type
US2480462A (en) * 1944-01-07 1949-08-30 Western Electric Co Tunable magnetron
US2504329A (en) * 1944-04-05 1950-04-18 Bell Telephone Labor Inc Oscillation damping device
US2595652A (en) * 1944-04-05 1952-05-06 Bell Telephone Labor Inc Coupled cavity resonator
US2655616A (en) * 1944-05-24 1953-10-13 English Electric Valve Co Ltd Magnetron
US2452078A (en) * 1944-05-24 1948-10-26 Raytheon Mfg Co Thermally tunable electron discharge device
US2449794A (en) * 1944-10-12 1948-09-21 Westinghouse Electric Corp Electron discharge device
US2530185A (en) * 1944-11-04 1950-11-14 Westinghouse Electric Corp Electron discharge device
US2478534A (en) * 1944-12-13 1949-08-09 Raytheon Mfg Co Electron discharge device of the cavity resonator type
US2459030A (en) * 1945-03-07 1949-01-11 Bell Telephone Labor Inc Tunable magnetron
US2624861A (en) * 1945-03-19 1953-01-06 Raytheon Mfg Co Electron discharge device of the magnetron type
US2477317A (en) * 1945-03-21 1949-07-26 Raytheon Mfg Co Electron discharge device
US2473399A (en) * 1945-03-27 1949-06-14 Raytheon Mfg Co Electron discharge device of the magnetron type
US2542908A (en) * 1945-04-04 1951-02-20 Raytheon Mfg Co Mechanical tuner for cavity resonators
US2566478A (en) * 1945-04-06 1951-09-04 Raytheon Mfg Co Tunable magnetron
US2519826A (en) * 1945-04-30 1950-08-22 Raytheon Mfg Co Electron discharge device
US2506955A (en) * 1945-05-14 1950-05-09 Bell Telephone Labor Inc Tunable high-frequency circuits
US2523049A (en) * 1945-06-23 1950-09-19 Gen Electric Water-cooled multicircuit magnetron
US2589885A (en) * 1945-10-19 1952-03-18 Us Sec War Tunable magnetron
US2450619A (en) * 1945-10-19 1948-10-05 Sonkin Simon Tunable magnetron
US2512901A (en) * 1945-11-01 1950-06-27 Charles V Litton Adjustable magnetron
US2508576A (en) * 1945-11-09 1950-05-23 Us Sec War Tunable magnetron
US2639406A (en) * 1946-01-03 1953-05-19 Us Sec War Tunable magnetron tube
US2719240A (en) * 1946-03-14 1955-09-27 Laurence R Walker Cathode structure
US2504187A (en) * 1946-05-02 1950-04-18 Raytheon Mfg Co Electron discharge device
US2623198A (en) * 1946-05-13 1952-12-23 Bell Telephone Labor Inc Tunable magnetron
US2615143A (en) * 1946-07-17 1952-10-21 Raytheon Mfg Co Magnetron electron discharge device
US2501152A (en) * 1946-09-05 1950-03-21 Raytheon Mfg Co Tunable magnetron
US2625669A (en) * 1947-02-01 1953-01-13 Raytheon Mfg Co Electron discharge device
US2632231A (en) * 1947-05-27 1953-03-24 Raytheon Mfg Co Manufacture of electron-discharge devices
US2693545A (en) * 1947-08-05 1954-11-02 Eitel Mccullough Inc Electron tube structure
US2509265A (en) * 1947-08-13 1950-05-30 Rca Corp Tunable cavity resonator magnetron
US2621311A (en) * 1947-12-26 1952-12-09 Raytheon Mfg Co Mechanical movement
US2615156A (en) * 1948-02-14 1952-10-21 Rca Corp Frequency modulation of electron discharge devices
US2629068A (en) * 1949-10-06 1953-02-17 Raytheon Mfg Co Tunable magnetron device
US2851633A (en) * 1951-06-07 1958-09-09 Csf Multi-cavity resonant circuits
US2651738A (en) * 1951-07-12 1953-09-08 Univ Ohio State Res Found Wide range inductively-tuned oscillator
US2834916A (en) * 1956-08-28 1958-05-13 Bomac Lab Inc Tuning member for tunable magnetron devices
US3343031A (en) * 1963-12-21 1967-09-19 Philips Corp Tunable electronic tube
US3513516A (en) * 1965-03-16 1970-05-26 Signalite Inc Adjustable electrode spark gap assembly
WO1998015968A1 (fr) * 1996-10-04 1998-04-16 Thomson Tubes Electroniques Dispositif d'accord en frequence rapide pour tube hyperfrequence et tube hyperfrequence equipe de ce dispositif
US6163112A (en) * 1996-10-04 2000-12-19 Thomson Tubes Electroniques Device for quick frequency tuning of a microwave tube using a direct sensing means

Also Published As

Publication number Publication date
FR954569A (en, 2012) 1950-01-03

Similar Documents

Publication Publication Date Title
US2422465A (en) High-frequency magnetrons
US2063342A (en) Electron discharge device
US2115521A (en) Magnetron
US2424496A (en) Tunable magnetron of the resonator type
US2824996A (en) Travelling wave tubes
US2406277A (en) High-frequency electric discharge device
US2406276A (en) Electric discharge device
US2446826A (en) Magnetron
US2404212A (en) Magnetron
US2428888A (en) High-frequency electric discharge device
US2485401A (en) Magnetron
US2629068A (en) Tunable magnetron device
US2424805A (en) High-frequency magnetron
US2443445A (en) Cavity resonator magnetron and strapping arrangement therefor
US2444419A (en) Magnetron
US2523049A (en) Water-cooled multicircuit magnetron
US2529950A (en) Tunable electron discharge device
US2450629A (en) Ultra high frequency magnetron generator
US3289035A (en) Reverse magnetron having means to suppress undersired modes
US2421591A (en) Ultra high frequency device of the cavity resonator type
US2427558A (en) High-frequency oscillator
US3392308A (en) Crossed field tube having a pair of permanent magnets of different magn etomotive force
US2444418A (en) High-frequency electronic device
US2617956A (en) High-frequency discharge device
US2945156A (en) Tunable high-frequency apparatus