US2607905A - Microwave generator - Google Patents

Microwave generator Download PDF

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Publication number
US2607905A
US2607905A US37448A US3744848A US2607905A US 2607905 A US2607905 A US 2607905A US 37448 A US37448 A US 37448A US 3744848 A US3744848 A US 3744848A US 2607905 A US2607905 A US 2607905A
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United States
Prior art keywords
cathode
resonators
resonator
wall
high frequency
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Expired - Lifetime
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US37448A
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English (en)
Inventor
Ludi Fritz
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Patelhold Patenverwertungs and Elektro-Holding AG
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Patelhold Patenverwertungs and Elektro-Holding AG
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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
    • 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

Definitions

  • the resonator has annular end walls bounded in a, radial direction by outer and inner cylindrical walls, and the inner wallis .constituted by a cylindrical array of spaced anode segments, adjacent segmentsin the array. being secured to opposite end Walls suchthat alter nating, potentials are developed between adjacently positioned segments as the. resonator oscillates.
  • Another specific ObjECtrlS. toprovide an improvedmicro-wave generator. having a pair of intercoupled' cavity resonators, the high frequency fields 'ofwhichare displaced 180 apart in phase. 1
  • micro-wave generator having three associatedcavity. resonators for usein producing three phase oscillations, the high frequency; osci-llationsoitheseveral phases .beinajintercoupled so .aszto be displacedlZO-tapart in phase.
  • Fig. 1 is..a perspective view illustrating one embodiment of the invention. in which thegenerator is'provided with a Pair. of adjacent interconnected cavity resonators, the oscillations of which are spaced 180 apart in phase the usualmagnetic structure by which a; unidirectional; magnetic field -is-.established parallel: to .the. axis of the cathode, has been omitted forthe sake of simplicity.
  • fig. 2 isa verticalsection; taken along the axis. of the. oath.-
  • the improvedv high frequency generator is seen to include the usual cathode I, heated indirectly by filament la,
  • the two resonators are combined in a single hollow cylindrical conductive structure made up from an outer cylindrical wall 3 of conductive material extending longitudinally of the cathode, annular conductive end walls 4 and 5 extending transversely of the cathode, a third transverse annular conductive wall 6' placed intermediate the end walls 4, 5,-and an inner cylindrical wall parallel with theouter wall 3.
  • This inner wall is comprised of a cylindrical'array of spaced anode segments 1 extending parallel to the cathode inwardly from end wall 4 to a point just short of intermediate wall 6, a similar array of anode segments 8 extending inwardly from end wall 5 and which are aligned with the anode segments 'L-and a third cylindrical array of spaced anode segments 9,10 carried by the intermediate wall 5 and which extend'respectively in opposite directions therefrom.
  • Anode segments 9, In likewise lie parallel to the cathode axis in thespaces between anode segments 1, 8 and terminate just short of the end wallsal, 5.
  • Resonator A is thus constituted by the;cavity defined by outer wall 3, anode segments 1, 9 and transverse Walls 4, 6; and resonator B is constituted by the cavity defined by outer Wall 3', an- I ode segments 8, l6 and transverse walls..5, 6.
  • :LThUSfOI' example in resonator A at the instant that the anode segments 7 secured to end wall are charged positive, the anode segments 9 secured to intermediate wall 6 will be charged negative, and vice versa, as the resonator circuit oscillates.
  • Resonators A and B and the cathode l are all enclosed within an evacuated envelope II; a post '12 beaded into the lower end of the envelope is usedto support the resonator structure; filament la.
  • Figs. 2 and 3 The construction of the ultra-high frequency generator shown in Figs. 2 and 3 is substantially the same as the one shown in Fig. 1 and for ready comparison between the two structures, like reference numerals but with primes added thereto have been used to designate like parts in the two structures.
  • pole pieces 22, 23 of a generally C-shaped magnet are shown in Fig. 2
  • the principal object of this i'nvention is 'to more effectively isolate th cavity resonator component of'the generator from all extraneous charges or fields that might exert a disturbing influence on the high frequency oscillations generated because of the inductive cou- 'pling between the high frequency magnetic field and cathode.
  • the desired result is obtained in Fig. l and Figs. 2, 3 by providing dual resonators and arranging these such that the respective phases of the high frequency fields are stage gered by".1 That is to say, the field in 'on resonatoris always opposite in direction to that intheother resonator, such condition being illustrated schematically iri"Fig. ,2 by the usual 65 and'Q direction symbols.
  • Condenser-plates 3-0*of circuit Ia'repre sent the capacitance of anode segments 1, '9 of resonator A; condenser plates 3'l of circuit b represent'the capacitance ofanode segments 8, I oiFre'sonator'B; coil 32 represents the inductance of circuit aconstituted by end walls 4, 6 and that half of. outer wall 3 included therebetween; and coil 33' the inductance ofcircuit. lr constituted by end walls- 5, I6. and the. other half of outer wall 'Sincludedtherebetween.
  • FIG. 6 illustrates in a somewhat diagrammatic form a further modification utilizing three resonatorsintercoupled 'in such. manner that their respective high frequency fleldsare staggered in phase by 1 20 electrical degrees.
  • I generator is especially suited for producing three phase high frequency oscillations. Basically, this form of the invention is the same as that shown in Fig.
  • the resonator structure is comprised of an outer cylindrical wall 40, parallel with the cathode axis, annular end walls 4
  • Circular arrays of anode seg- This form of ments 45, 46 extend inwardly from end walls 4
  • 6 v ments 41-, 4'8 extend in both directionsl from the intermediate walls 43', 44; respectively, soas 'to lie in the spaces between the anode segmentsiflg Coupling loops 5 I, 5 2 and'53 extend respectively into thethreeresonators C, 'D and El-for extract; ing high frequency energy from the generator;
  • Amicro-wave generator comprising a cathode; a..plurality of like annular hollow resonators-surrounding said cathode and located in side-by-side'relation along the cathode axis and concentric therewith,..each of said resonators including, annular. end walls and bounded in-Ja radial direction by an outer cylindrical wail and aninner' wall constituted by a cylindrical array of Iinterfi'tti'ng anode. "segments.
  • a micro-wave generator as defined in claim 1, wherein said means intercoupling said resonators includes said symmetrically arranged means for extracting high frequency energy from the respective resonators.
  • micro-wave generator comprising an evacuated envelope housing a cathode; an annular resonator structure disposed concentrically about said cathode, said resonator structure comprising annular endwalls, an outer cylindrical wall extending between said end walls, an intermediate annular wall parallel with said end walls and an inner cylindrical wall constituted by a cylindrical array of interfitting anode segments terminating in alternation on said end and intermediate walls, the annular space defined between one of said end and intermediate walls and the inner and outer wall section therebetween constituting one resonator, and the similar space defined by said intermediate wall and the other end wall and by the sections of the inner and outer walls therebetween constituting a second resonator; means adjacent said resonators for'establishing a unidirectional magnetic field within the space defined by the inner wall of.
  • Amicro-wave generator as defined in claim 3' wherein said coupling means comprises means interconnecting the high, frequency lead-olf- '3 wherein said coupling means comprises a coupling loop extending through an aperture in said intermediate wall into both resonators and which surrounds the respective high frequency fields of the resonators in inverse sense.
  • a micro-wave generator comprising a cathode; three annular hollow resonators disposed concentrically about said cathode in side-by-side relation, each of said resonators including annular' end walls and bounded in a radial direction by an outer cylindrical wall and an inner wall constituted by a cylindrical array of interf'fitting anode segments terminating in alternation on said end walls; means adjacent said resonators for establishing a' unidirectional magnetic field within the space defined by the said ne l, p each ire na p l.a dy a a l l i m n axis p :13 10 m?
  • a micro-wave generator comprisinga cathode; an annular hollow resonator structure disposed concentrically about said cathode; said resonator structure comprising end walls, an outer cylindrical wall connecting said end walls, a pair of spaced annular walls arranged parallel with said end walls and intermediate thereof, and an inner wall constituted by a cylindrical array of interfitting anode segments terminating in'alternation on said end and'intermediate walls, the annular spaces defined respectively between said end and intermediate walls and the inner'and' outer wall sectionstherebetween constituting three like resonators; ineans fadjacent said resonator structure for establishing a unidirectional magnetic field within the space defined by the innerfwall of each resonator and parallel to the common axis thereof; lead-01f means cooperative with each resonator for ex.- tracting high frequency energy; and means including said intermediate walls intercoupling said resonator chambers together and so .0011- structed and arranged that the, inductive reflect of the

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  • Microwave Tubes (AREA)
US37448A 1947-08-16 1948-07-07 Microwave generator Expired - Lifetime US2607905A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH660367X 1947-08-16

Publications (1)

Publication Number Publication Date
US2607905A true US2607905A (en) 1952-08-19

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US37448A Expired - Lifetime US2607905A (en) 1947-08-16 1948-07-07 Microwave generator

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US (1) US2607905A (US08063081-20111122-C00044.png)
BE (1) BE484395A (US08063081-20111122-C00044.png)
CH (1) CH259948A (US08063081-20111122-C00044.png)
DE (1) DE872074C (US08063081-20111122-C00044.png)
FR (1) FR970385A (US08063081-20111122-C00044.png)
GB (1) GB660367A (US08063081-20111122-C00044.png)
NL (2) NL141705B (US08063081-20111122-C00044.png)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2838710A (en) * 1952-03-20 1958-06-10 Philips Corp Resonator system for discharge tubes
US2888609A (en) * 1953-09-24 1959-05-26 Raytheon Mfg Co Electronic devices
US3084280A (en) * 1960-10-24 1963-04-02 Eitel Mccullough Inc Interdigital line magnetron
US3211948A (en) * 1961-10-23 1965-10-12 Forman Jan Planar magnetron
US3274433A (en) * 1963-05-14 1966-09-20 Varian Associates Magnetron and radio frequency circuitry therefor
US3286125A (en) * 1961-11-20 1966-11-15 Gen Electric Radio frequency apparatus
US3300681A (en) * 1965-10-22 1967-01-24 Gen Electric Adjustable magnet for a magnetron

Citations (6)

* 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
US2128237A (en) * 1934-12-24 1938-08-30 Pintsch Julius Kg Vacuum discharge tube
US2144222A (en) * 1935-08-15 1939-01-17 Telefunken Gmbh Electron discharge device
US2233261A (en) * 1936-07-16 1941-02-25 Telefunken Gmbh Magnetron discharge tube and method of operating the same
US2409222A (en) * 1941-07-19 1946-10-15 Bell Telephone Labor Inc Electron discharge device
US2463416A (en) * 1946-05-08 1949-03-01 Arnold T Nordsieck Anode for strapped magnetrons

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2128237A (en) * 1934-12-24 1938-08-30 Pintsch Julius Kg Vacuum discharge tube
US2144222A (en) * 1935-08-15 1939-01-17 Telefunken Gmbh Electron discharge device
US2115521A (en) * 1936-04-30 1938-04-26 Telefunken Gmbh Magnetron
US2233261A (en) * 1936-07-16 1941-02-25 Telefunken Gmbh Magnetron discharge tube and method of operating the same
US2409222A (en) * 1941-07-19 1946-10-15 Bell Telephone Labor Inc Electron discharge device
US2463416A (en) * 1946-05-08 1949-03-01 Arnold T Nordsieck Anode for strapped magnetrons

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2838710A (en) * 1952-03-20 1958-06-10 Philips Corp Resonator system for discharge tubes
US2888609A (en) * 1953-09-24 1959-05-26 Raytheon Mfg Co Electronic devices
US3084280A (en) * 1960-10-24 1963-04-02 Eitel Mccullough Inc Interdigital line magnetron
US3211948A (en) * 1961-10-23 1965-10-12 Forman Jan Planar magnetron
US3286125A (en) * 1961-11-20 1966-11-15 Gen Electric Radio frequency apparatus
US3274433A (en) * 1963-05-14 1966-09-20 Varian Associates Magnetron and radio frequency circuitry therefor
US3300681A (en) * 1965-10-22 1967-01-24 Gen Electric Adjustable magnet for a magnetron

Also Published As

Publication number Publication date
CH259948A (de) 1949-02-15
NL76865C (US08063081-20111122-C00044.png)
BE484395A (US08063081-20111122-C00044.png)
DE872074C (de) 1953-03-30
FR970385A (fr) 1951-01-03
GB660367A (en) 1951-11-07
NL141705B (nl)

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