US3553524A - Magnetron with improved vane and strap structure - Google Patents

Magnetron with improved vane and strap structure Download PDF

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Publication number
US3553524A
US3553524A US789131A US3553524DA US3553524A US 3553524 A US3553524 A US 3553524A US 789131 A US789131 A US 789131A US 3553524D A US3553524D A US 3553524DA US 3553524 A US3553524 A US 3553524A
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Prior art keywords
vanes
strap
vane
aperture
slotlike
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Expired - Lifetime
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US789131A
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English (en)
Inventor
Donald G Hill
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Northrop Grumman Guidance and Electronics Co Inc
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Litton Precision Products Inc
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    • 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
    • H01J23/22—Connections between resonators, e.g. strapping for connecting resonators of a magnetron

Definitions

  • slot-like passage is located in the vane between the first open- 3 l5/39.7 5 ing and vane tip to form a passage therebetween.
  • the strap is, Int. Cl. .1101] 25/50, broadly speaking, of a relatively flat washer-like geometry and H01 j 23/22 fits through the slot-like opening into a position in the large Field of Search 315/3951, opening and in that position avoids contacting the vane.
  • a 39.65, 39.69, 39.75 second slot-like opening is vertically spaced from the above mentioned openings and provides a snug fit for a second References Cited horizontally spaced vane strap.
  • the method of the invention UNITED STATES PATENTS includes an assembly procedure in which the vanes are pushed 2,837,696 6/1958 LaRue 315/39.69X Onto the Strapsa 4 11 f 22 r 7 Q l I I 4 J6 17 .19 3
  • the magnetron is a well known electron discharge device used to generate electromagnetic fields in the microwave frequency range.
  • the magnetron includes a cylindrical cathode, a cylindrical anode surrounding the cathode, and a plurality of resonant cavities formed in the anode by either slots or vanes.
  • An electric field is established between the cathode and the anode and a magnetic field is applied perpendicular to the electric field in the interaction region, a space between the cathode and the resonant cavities in the anode.
  • E/H electrons emitted from the cathode interact with the electric and magnetic fields togenerate microwave energy of a frequency determined by the parameters and the resonance characteristics of the cavities.
  • electrical fields normally established in the resonant cavity are such as to inhibit the entrance of bombarding electrons, and, accordingly provide protect ion for the strap.
  • the removal of the straps slightly into the resonant cavities inhibited the electromagnetic fields generated by currents flowing in the straps from interfering with the cathode.
  • the passage through the vane is essentially of a right cylindrical geometry whereas the ring shaped strap is essentially circular. Accordingly, in pushing the various vanes onto the ring shaped strap one is effectively attempting to put a bent circular shaped body of circular cross section through a right cylindrical passage of essentially the same diameter as the cross section. This relationship causes the two ends of the cylindrical passage to hook onto or bind with portions of the circular strap. Such binding between the elements makes assembly exceedingly difficult: the vane must be carefully moved or jockeyed into its angular position along the strap in order to avoid undue bending or distortion in shape of the latter. As is apparent, this is a very difficult and time consuming procedure and accordingly a very expensive one.
  • the invention includes in a magnetron having a vane with a vane tip facing the'cathode, a passage or aperture through said vane spaced from the vane tip; and a second slot-like passage aperture through the vane smaller in cross section than said first which forms a passage between the vane tip and said first passage.
  • a thin strap having generally a washer-like shape located so that it passes through the first aperture without contacting the vane.
  • each vane includes a second slot vertically spaced from the other aperture which extends from the vane tip facing the cathode to a predetermined distance into the vane which is of the same height as the height of the first slot.
  • a second strap identical in construction with the first strap is positioned in this slot by inserting same from the vane edge.
  • the depth of this second slot is greater in dimension than the annular portion of the strap.
  • a protrusion is included on this portion of the strap which protrudes radially inwardly to fill the remaining portion of this second slot.
  • the portion of the strap which is inserted into this second slot includes a notch along the outer periphery thereof which extends radially inwardly so that the sides of the slot engage the side surfaces of the vane to thereby permit the vane during assembly to be self-aligning.
  • the strap be as thin as possible and that the length of the slot-like passage is at least twice as great as its height.
  • the thickness of height of the strap is slightly smaller than the height of the slot in order to permit the strap to slide therethrough from the direction of the vane tip into the first aperture.
  • a double strap vane arrangement is assembled in accordance with another aspect of my invention by simply spacing the straps a distance apart equal to the distance between the first and second slots in each vane and pushing the vanes onto the straps whereby a portion of the strap proceeds through the slot-like opening to a final location within the larger passage connected therewith while the second strap is pushed fully into the second slot and abuts the back end thereof.
  • FIG. 1 shows a top view of a portion of a magnetron which embodies the novel vane and strap construction of my invention
  • FIG. 2 is a cross section of the embodiment of FIG. 1 taken along the lines A-A;
  • FIGS. 3a and 3b illustrate a single strap of the preferred geometry used in the preferred embodiment of the invention
  • FIG. 4 shows a side view of a strap constructed in accordance with the teachings of the invention
  • FIGS. 6, 7, 8a, 8b, and 9 illustrates the various steps followed in assembling by a novel method the preferred embodiment of the invention.
  • FIG. 1 is a top view of a portion of a conventional vane and strap magnetron modified to embody the vane and strap construction of the invention. Consideration of FIG. 1 may be taken together with the illustration of FIG. 2 which is a sectional side view taken along the lines A-A of the embodiment of FIG. 1. Seen from the top in FIG. 1 is the anode l.
  • Anode 1 has a substantially cylindrical hollow geometry and is of electrically conductive material. Attached to and projecting inwardly from the inner cylindrical wall of the anode are an evenly spaced plurality of eight vanes 2, 3, 4, 5,6,7, 8, and 9.
  • the vanes are generally rectangular bodies of electrically conductive material which geometry is better illustrated in FIG. 2. Each of the vanes shown in FIG.
  • FIG. 1 projects from the anode wall to within a predetermined distance of a cylindrical cathode 10 essentially located in the center of and having its axis concentric with the axis of the cylindrical anode.
  • the vanes are evenly spaced about the walls of anode 1.
  • the spaces between adjacent vanes form eight identical resonant cavities, 12, each of which is resonant at the frequency to which the magnetron is designed to generate high frequency energy.
  • the annular space surrounding cathode 10 between the tips of vanes 2 through 9 and the surface of cathode 10 is conventionally termed the interaction region.
  • An'exemplary output coupler 14 for coupling microwave energy out of the magnetron is illustrated in the FIG.
  • the magnetron contains two electrically conductive straps l5 and 16, one directly above the other. However, only upper strap 16 is visible in the section of FIG. 1. Strap 16 is connected to the vanes in the conventional manner; that is, it is physically connected to sets of alternate vanes so that it electrically joins those vanes together; whereas it is insulated from and does not contact the intermediate vanes, those between the alternate vanes. For purposes of better illustrating this construction a portion of two adjacent vanes 3 and 4 are cutaway to expose the underlying portion of strap 16. Cutaway portion of vane 3 is represented by the number 19; and cutaway portion'of the adjacent vane 4 is represented by number 20 in FIG. 1.
  • strap 16 is generally annular shaped washer-like member of electrically conductive material. That portion of the strap between vane 3 includes a radially inwardly projecting portion 17 which fills in a slot in the vane and a slight notch or slot 18 on its outer periphery in which the strap anchors in the vane. Strap 16 is in direct physical contact with vane 3. However, adjacent vane 4 does not physically contact with strap 16 but merely passes through a passage 22 therethrough.
  • FIG. 2 is a cross section of the anode portion of a magnetron illustrated in FIG. 1 taken along the lines A-A.
  • This illustration permits a full side view of the two vanes 3 and 7 which are supported from the inner wall of cylindrical anode l.
  • Cathode 10 is centrally positioned between the vane tips.
  • Dotted line 19 represents the portion of the vane 3 which was cutaway in FIG. 1 in order to permit illustration of a portion of the upper strap 16.
  • Straps 15 and 16 are spaced apart vertically a predetermined distance and are inserted into openings formed in the anode vanes. While strap 16, as discussed, joined together the alternate vanes, strap 15 joins together the remaining or'intermediate vanes.
  • Each vane has the two sets of openings or passages through the vane. One set is a slot-like passage 24 dimensioned so as to permit strap 16 to fit snugly therein. This vane opening is termed a contacting passage.
  • the second opening consists of two passages; a larger passage 26, which corresponds to passage 22 in vane 4 of FIG.
  • slot-like passage 28 is of a height sufficient to permit passage therethrough of strap 15 during the assembly procedure.
  • vanes and straps are suitably angularly oriented and spaced so that the strap 16 fits into the contacting type passage in one vane and passes through the noncontacting type passage in the adjacent vanes without contact.
  • the straps electrically join and are physically supported by only alternate ones of the vanes.
  • the relationship between the dimensions of the slot passage in the noncontacting passage, such as slot 28, and the cross section of the strap, such as strap 15, is preferably such that the length of that portion of the passage is at least twice as great as its height while the height of the passage is slightly greater than the thickness of the strap.
  • a complete magnetron includes numerous other elements such as the complete container, connections for supplying voltages and currents to the anode and cathode, a filament, sockets, permanent magnets or other magnet means, magnetic pole pieces, etc.
  • these additional elements are all conventional; and the inclusion of same in .this disclosure would not aid in the understanding of the invention. Accordingly, they are not presented.
  • FIGS. 3a and 3b a section of FIG. 1 taken along the line 8-8, show in greater detail the'physical geometry of each strap in the preferred embodiment of the invention, such as was illustrated in the preceding figures.
  • Strap 30 is a relatively thin flat washer-like element of conductive material.
  • a plurality of inwardly projecting portions or protrusions 32 equal in number to the number of vanes with which the strap is to electrically join and, hence, equal to one-half the number of vanes in the anode assembly are shown.
  • These protrusions are of such dimension as to fill in the space fonned in the contacting type passages in the vanes as is shown in FIG. 2 or such as slot 45 in FIG. 4.
  • the strap is thin;" that is, the width dimension, 36, of the cross section of the annular portion is equal to or greater than twice its height dimension or thickness, 38. Ideally the strap is made as thin as is possible.
  • FIG. 4 illustratesa side view of a single anode vane 40 constructed in accordance with the invention.
  • the vane contains the two sets of openings, one above the other, for accommodating two straps in the manner illustrated and discussed with respect to FIGS. 1 and 2.
  • the noncontacting type passages include the larger passage 42 spaced from but proximate the vane, tip 43. Passage 42 is larger in both width and height than, the corresponding dimensions of the portion of a strap, indicated by the dashed lines, which is to pass therethrough when assembled.
  • the noncontacting type passage includes the second slot-like passage or opening 44 which provides a passage between the vane tip 43 and passage 42; thus forming a passage for insertion of the strap from the vane tip end of vane 40 through passage 44 and to a final position within passage 42.
  • the length of the slot-like passage 44 is preferably at least twice as great at its height.
  • the height of passage 44 is sufficient to permit a strap to pass therethrough in assembly.
  • the contacting type passage isshown as slot-like passage 45. This passage extends from vane tip 43 back into the vane to a predetermined depth less than that of passage 42, but greater than that of passage 44. The height of slot-like passage 45 is sufficient to allow the strap to be inserted and fit snugly therein.
  • FIG. 5a illustrates in cross section a double strapping arrangement on the top and bottom edges of the vane.
  • This includes a first pair of straps 51 and 52 and a second pair of straps 53 and 54 which are located in slots, one wider than the other located in the vane and on the top 55 and bottom 56 edges of vane 57 away from the vane tip 58 or cathode facing edge.
  • This is the construction that is almost universally employed as a compromise. Since it is located remote from the center of the vane and vane edge 58, it is not as effective to prevent moding as the construction of FIG. 5b However, it does not have the attendant disadvantages to the construction of FIG. 5b since it is not directly exposed to electrons from the cathode and does not produce as substantial fields which interfere with the operation of the cathode.
  • FIG. 5b represents vane edge or center strapping, as variously termed, in which straps 61 and 62 are located in slots, one wider than the other, in the vane tip edge 63 of vane 64. Note that strap 61 is exposed to electrons coming from the cathode toward vaneedge 63.
  • FIG. 50 illustrates in cross section the hole-in-vane type center strapping with straps 65 and 66 extending through holes through vane 67.
  • One hole 68 is large enough to prevent contact with strap 65 which protrudes therethrough in accordance with the conventional requirements of strapping alternate vanes.
  • the metal vane protects the straps from electrons emanating at the cathode coming from the direction of the cathode facing edge or vane tip 69. Moreover, it is removed from the vane edge and consequently does not generate substantial fields which would interfere with the operation of the cathode.
  • the disadvantage of this construction is in its cost of assembly as in hereinafter made evident.
  • FIG. 5d represents pictorially the difficulties encountered during the assembly of the hole-in-vane type strapping construction.
  • An enlarged cross section of the vane around the portion of the straps which contacts the vane, such as strap 66 in FIG. 50 is illustrated.
  • Each strap in FIG. 5c is in the shape of a split ring which is cut open and spread apart slightly, similar to a chain link, and. the vanes are pushed onto the strap, individually, then spaced, and the strap is reclosed.
  • the passage or hole-'70 in vane 67' which corresponds to the hole in which the strap 66 of FIG. 50 protrudes is seen to be rectangular in cross section, and is substantially a right cylindrical passage.
  • the strap 66 in the form of a ring is of a circular geometry. Accordingly, as vane 67 is pushed onto strap 66' some binding occurs at points 7 I and 72 due to this dissimilar geometry and each vane as it is pushed onto strap 66' must be carefully and slowly jockeyed into place to avoid mechanically bending or distorting the shape of strap 66'. This problem is multiplied by the number of vanes to be assembled.
  • the construction of the present invention combines the electrical advantages of the hole-in-strap type construction of FIG. 50 with the ease of assembly possible with the center strapped slot construction, such as represented by FIG. 5b as hereinafter brought out in a preferred method of assembly hereinafter set forth. Moreover, it has been found that the limited exposure of straps made possible by the intermediate passage in the strap, such as 28 in-FIG. 2, has not created any serious problems. p
  • straps 75 and 76 are inserted on a splined rod 77.
  • the splines are not illustrated in this FIG.
  • the recesses in the splined rod correspond in number to double the number of projecting portions on any one strap and equal to the number of vanes.
  • the straps are spaced by means of spacers 78 and 79 which rest upon the jig bottom 80 through which splined rod 77 is inserted. Spacers 78 and 79 are moved in from the side and the lowermost strap 76 is placed and fits within a recess or slot therein.
  • the uppermost strap 75 rests on the top surface of spacers 78 and 79.
  • top and bottom straps are angularly oriented about rod 77 so that the projecting portions of one strap is aligned with the space between two projecting portions of the other strap.
  • a washer shaped member 81 fits over the top of rod 77 and holds upper strap 75 in place on top of the spacers.
  • the vanes 82 and 83 are pushed in from the side. That is, they maybe slid along jig bottom 80 and pushed onto straps 75 and 76 which are spaced and sized in accordance with the teachings of the invention to fit within the slots in each vane.
  • the vane is pushed along until the vane edge abuts the back of the slot or spline in rod 77.
  • the vanes are alternated so that the narrow slot on one vane is aligned with the wide slots on each adjacent vanes and the narrow slot is aligned with a projecting portion of each strap.
  • vanes may be pushed into position concurrently or consequently or in any order, and manually or with machines adapted for this purpose, automatically. Washer 81 is removed.
  • the spacers 79 and 80 may be removed during or before this step, but preferably not before at least two vanes substantially displace suitably diametrically opposed from another have been pushed into place so that they may subsequently perform the functions of the spacers.
  • FIGS. 8a and 8b illustrate a portion of the assembly during the preceding steps and shows the relationship and configuration of the elements.
  • FIG. 8a shows a top section of the splined rod 77', vanes 82' and 81 in place and sectioned to show of rod 77
  • center plug 90 is slightly wider than rod 77 and consequently exerts a force on the vane edges radially outward toward the cylindrical anode wall 84 which causes the back edge of vanes 82 and 83 to press against the anode wall.
  • the back edges are suitably prepared to be soldered to the back wall of the anode by conventional soldering and brazing procedures.
  • a magnetron of the vane and strap type which includes a cylindrical anode; a plurality of anode vanes spaced about and projecting radially from a cylindrical anode wall to within a predetermined distance of an axially located cylindrical cathode, with the vane tips of each of said vanes facing said cathode;and first and second vane straps spaced from one another, said first strap being in contact with alternate ones of said vanes without contacting intermediate ones of said vanes for providing an electrical connection between said alternate vanes and said second strap being in contact with intermediate ones of said vanes without contacting said alternate vanes for providing an electrical connection between said intermediate vanes:
  • a first aperture therethrough located proximate the vane tip; said first aperture being larger in dimension than the corresponding dimensions of an annular portion of a vane strap;
  • said intermediate vanes at a first predetermined location thereof and said alternate vanes at a second predetermined location thereof each include:
  • a third slotlike aperture said third slotlike aperture extending from the vane tip a predetermined distance into said vane for contacting and therewithin receiving a strap; said third slotlike aperture having approximately the same height as the height of said second aperture of said vanes;
  • said first strap being situated in said third slotlike aperture in said intermediate vanes for providing an electrical connection therebetween and extending through said first apertures of said alternate vanes without contact with said alternate vanes; and said second strap being situated in said third slotlike aperture in said alternate vanes for providing an electrical connection therebetween and extending through said first apertures of said intermediate vanes without contact with said intermediate vanes.
  • each said strap includes: a plurality, equal in number to one-half the number of vanes, of projecting portions each of which protrudes radially inwardly from the inner periphery of said annular member, each of said projections located within a corresponding one of said third slotlike apertures in which said annular member is situated to fill said respective third slotlike apertures up to the vane tip.
  • each said strap further includes: a plurality of shallow slots, equal in number to one-half the number of vanes, located evenly spaced along the outer periphery of said annular member, each said shallow slot having a bottom located within a corresponding one of said third slotlike apertures in which said annular member is situated and having sides in contact with the sides of the vane that includes said corresponding third slotlike apertures for enhancing alignment during assembly between said vanes and said strap.
  • a magnetron anode for a magnetron of the type containing a cylindrical anode having a plurality of spaced vanes projecting from said anode and surrounding a cylindrical cathode, with each of said vanes having a tip facing said cathode, and said anode includes at least first and second annular shaped vane straps, wherein intermediate ones of said plurality of vanes are connected by said first strap and the alternate ones of said plurality of vanes are connected by said second strap;
  • each alternate vane includes a first opening spaced from the vane tip, said first opening being larger in dimensions than corresponding dimensions of an annular portion of said first strap;
  • each intermediate vane includes a third slotlike passage extending into said vane from said vane tip for contacting and therewithin receiving said first strap;
  • said first strap comprises a relatively thin fiat continuous annular washer-shaped member having a plurality of equally spaced thin and flat projecting portions protruding radially inwardly from the inner periphery of said annular portion; said plurality of projecting portions in said first strap corresponding in number to one-half the number of vanes in said plurality of vanes and being located in corresponding ones of said third slotlike passage in said intermediate vanes.
  • said first aperture being larger in dimensions'than corresponding dimensions of an annular portion of said strap
  • said intermediate vanes each include: at a predetermined location thereof;
  • said strap comprises;
  • annular member having a thickness slightly less than the height of said second and third apertures, said strap being situated in said third slotlike aperture in said intermediate vanes for providing electrical connection therebetween and extends through said first apertures of said alternate vanes without contactwith said alternate vanes.
  • said second slotlike aperture is of a predetermined length and height said length thereof being at least twice as great as said height 9.
  • said strap includes a shallow slot at each of those plurality of angular locations along the outer periphery thereof within said third slotlike aperture of each of said intermediate vanes; and wherein the back end of said third slotlike aperture in each vane is positioned within a corresponding shallow slot in said strap for enhancing alignment between said vanes and strap during assembly.

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US789131A 1969-01-06 1969-01-06 Magnetron with improved vane and strap structure Expired - Lifetime US3553524A (en)

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US78913169A 1969-01-06 1969-01-06

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US (1) US3553524A (xx)
JP (1) JPS513192B1 (xx)
DE (1) DE1958394B2 (xx)
FR (1) FR2027819A1 (xx)
GB (1) GB1245506A (xx)
NL (2) NL6918451A (xx)
SE (1) SE345340B (xx)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3875469A (en) * 1972-12-20 1975-04-01 Hitachi Ltd Anode structure for magnetron
US4205257A (en) * 1977-09-07 1980-05-27 Hitachi, Ltd. Magnetron strap ring structure
US4714859A (en) * 1985-03-25 1987-12-22 The M-O Valve Company Limited Magnetrons
EP0263491A2 (en) * 1986-10-06 1988-04-13 Kabushiki Kaisha Toshiba Magnetron for microwave oven
US4891557A (en) * 1986-10-16 1990-01-02 Matsushita Electric Industrial Co., Ltd. Magnetron device
WO2001046981A2 (en) * 1999-12-21 2001-06-28 Marconi Applied Technologies Limited Magnetron anodes
KR20010084075A (ko) * 2000-02-23 2001-09-06 구자홍 마그네트론
US6504303B2 (en) * 2000-06-01 2003-01-07 Raytheon Company Optical magnetron for high efficiency production of optical radiation, and 1/2λ induced pi-mode operation
EP1441378A2 (en) * 2003-01-16 2004-07-28 Lg Electronics Inc. Anode and magnetron therewith
US20100062288A1 (en) * 2005-11-18 2010-03-11 David Weber System for generation of useful electrical energy from isotopic electron emission
US20170330721A1 (en) * 2016-05-13 2017-11-16 Hitachi Power Solutions Co., Ltd. Magnetron and method of adjusting resonance frequency of magnetron
CN107984153A (zh) * 2017-12-31 2018-05-04 中国电子科技集团公司第十二研究所 一种用于阳极去耦柱的焊接模具

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58121651U (ja) * 1982-02-15 1983-08-18 株式会社中央製作所 自動バフ研摩装置
US5146136A (en) * 1988-12-19 1992-09-08 Hitachi, Ltd. Magnetron having identically shaped strap rings separated by a gap and connecting alternate anode vane groups
HU206321B (en) 1989-10-16 1992-10-28 Alkaloida Vegyeszeti Gyar Improved process for producing 5-carbamoyl-5h-dibenz/b:f/azepine

Citations (4)

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Publication number Priority date Publication date Assignee Title
US2837696A (en) * 1954-10-07 1958-06-03 Raytheon Mfg Co Laminated magnetron constructions
US3027488A (en) * 1958-11-03 1962-03-27 Raytheon Co Tunable magnetrons
US3418523A (en) * 1964-12-23 1968-12-24 Philips Corp Magnetron having diverse size resonators
US3423632A (en) * 1965-12-08 1969-01-21 Nippon Electric Co Electron discharge device construction

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2837696A (en) * 1954-10-07 1958-06-03 Raytheon Mfg Co Laminated magnetron constructions
US3027488A (en) * 1958-11-03 1962-03-27 Raytheon Co Tunable magnetrons
US3418523A (en) * 1964-12-23 1968-12-24 Philips Corp Magnetron having diverse size resonators
US3423632A (en) * 1965-12-08 1969-01-21 Nippon Electric Co Electron discharge device construction

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3875469A (en) * 1972-12-20 1975-04-01 Hitachi Ltd Anode structure for magnetron
US4205257A (en) * 1977-09-07 1980-05-27 Hitachi, Ltd. Magnetron strap ring structure
US4714859A (en) * 1985-03-25 1987-12-22 The M-O Valve Company Limited Magnetrons
EP0263491A2 (en) * 1986-10-06 1988-04-13 Kabushiki Kaisha Toshiba Magnetron for microwave oven
EP0263491A3 (en) * 1986-10-06 1989-07-12 Kabushiki Kaisha Toshiba Magnetron for microwave oven
US4891557A (en) * 1986-10-16 1990-01-02 Matsushita Electric Industrial Co., Ltd. Magnetron device
WO2001046981A3 (en) * 1999-12-21 2001-12-06 Marconi Applied Techn Ltd Magnetron anodes
WO2001046981A2 (en) * 1999-12-21 2001-06-28 Marconi Applied Technologies Limited Magnetron anodes
US20030127987A1 (en) * 1999-12-21 2003-07-10 Brady Michael B Magnetron anodes
US6841940B2 (en) * 1999-12-21 2005-01-11 E2V Technologies (Uk) Limited Magnetron anodes
KR20010084075A (ko) * 2000-02-23 2001-09-06 구자홍 마그네트론
US6504303B2 (en) * 2000-06-01 2003-01-07 Raytheon Company Optical magnetron for high efficiency production of optical radiation, and 1/2λ induced pi-mode operation
EP1441378A2 (en) * 2003-01-16 2004-07-28 Lg Electronics Inc. Anode and magnetron therewith
EP1441378A3 (en) * 2003-01-16 2006-02-22 Lg Electronics Inc. Anode and magnetron therewith
US20100062288A1 (en) * 2005-11-18 2010-03-11 David Weber System for generation of useful electrical energy from isotopic electron emission
US20170330721A1 (en) * 2016-05-13 2017-11-16 Hitachi Power Solutions Co., Ltd. Magnetron and method of adjusting resonance frequency of magnetron
US10090130B2 (en) * 2016-05-13 2018-10-02 Hitachi Power Solutions Co., Ltd. Magnetron and method of adjusting resonance frequency of magnetron
CN107984153A (zh) * 2017-12-31 2018-05-04 中国电子科技集团公司第十二研究所 一种用于阳极去耦柱的焊接模具
CN107984153B (zh) * 2017-12-31 2024-05-07 中国电子科技集团公司第十二研究所 一种用于阳极去耦柱的焊接模具

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Publication number Publication date
FR2027819A1 (xx) 1970-10-02
DE1958394A1 (de) 1970-11-26
JPS513192B1 (xx) 1976-01-31
NL137275C (xx)
DE1958394B2 (de) 1972-04-13
SE345340B (xx) 1972-05-23
GB1245506A (en) 1971-09-08
NL6918451A (xx) 1970-07-08

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