US2241976A - High frequency apparatus - Google Patents

High frequency apparatus Download PDF

Info

Publication number
US2241976A
US2241976A US331562A US33156240A US2241976A US 2241976 A US2241976 A US 2241976A US 331562 A US331562 A US 331562A US 33156240 A US33156240 A US 33156240A US 2241976 A US2241976 A US 2241976A
Authority
US
United States
Prior art keywords
cathode
wave
space charge
high frequency
conductor
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
US331562A
Other languages
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
Application filed by General Electric Co filed Critical General Electric Co
Priority to US331562A priority Critical patent/US2241976A/en
Priority to GB5344/41A priority patent/GB555825A/en
Priority to FR872656D priority patent/FR872656A/fr
Application granted granted Critical
Publication of US2241976A publication Critical patent/US2241976A/en
Priority to CH224079D priority patent/CH224079A/de
Priority to BE443575D priority patent/BE443575A/xx
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C7/00—Modulating electromagnetic waves
    • H03C7/02—Modulating electromagnetic waves in transmission lines, waveguides, cavity resonators or radiation fields of antennas
    • 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
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P5/00—Coupling devices of the waveguide type
    • H01P5/04—Coupling devices of the waveguide type with variable factor of coupling

Definitions

  • the present invention relates to high frequency apparatus.
  • This object is fulillled by the use of an electronic device of the magnetron type which is so arranged that its electrode elements form components of the concentric conductor transmission line or other wave-guiding structure suitable for use in the ultra-high frequency range. It is found that the properties of such a device may be varied in a manner calculated to cause a corresponding modification of the wave-propagating characteristics of the structure in which it is lncorporated, and that by this means one may readily accomplish variable or controllable eilects considered difllcult or impossible to obtain by systems heretofore available.
  • FIG. 1 is a longitudinal sectional view of an apparatus suitably embodying the invention
  • Figs. 2 and 3 represent altersectional view of a structural modification of the (ci. 17a-171.5).
  • - is proucked axially of the'cathode II and serves to impart a rotary motion to electrons emitted cathode.
  • this circuit is of a type which is suitable for use at frequencies on the order of 100 megacycles or higher. It comprises an elongated inner conductor and a coaxial outer tubular conductor 24, these elements forming in combination a wave-guiding structure of the type frequently referred to as a coaxial conductor transmission line.
  • Such structures are capable of propagating high frequency electromagnetic waves without substantial energy dissipation and are therefore useful either as high frequency tank circuits or as transmitting agencies for high frequency power.
  • the conductors 23 and 24 form parts of a resonant system which by the is short circuited at the extremity remote from invention;
  • Figs..5 and 6 are enlarged fragmentary views, taken in different planes, oi' certain parts of the apparatus of Fig. 4;
  • Figs. '1 and 8 respectively show additional structural variations of the invention;
  • Fig. 9 shows the application of the invention in connection with a cavity reso-- nator which is used as a high frequency tank circuit;
  • Fig. 10 shows a somewhat similar application of the invention in connection with a cavity resonator used as a modulating device.
  • FIG. 1 there is shown an embodiment of the invention suitable for use in a system of frequency modulation.
  • the illustrated arrangement includes as a source of high frequency electromagnetic waves a l the oscillation generator I0 by a conducting part 21.
  • a source of high frequency electromagnetic waves a l the oscillation generator I0 by a conducting part 21.
  • the operating wave length is made controllably variable by incorporating in the resonant structure a second magnetron device 29.
  • This device includes as an anode a conducting cylinder 30 which is in such proximity to the tubular conductor 24 as to be closely coupled thereto and to form, in eilect, an integral part of the conductor.
  • the cathode of the device29 consists of an elongated conductive element 3i which is electronemissive throughout substantially its entire length and which constitutes a colinear extension of the conductor 23.
  • the emitting portion of the cathode is shown as being indirectly heated through the agency .of a resistance heater 32 and a heating battery 33.
  • l'A choke coil 3,4 prevents circulation of high frequency currentsin the heatingv circuit.
  • is connectedto the part 21 an is, therefore, effectively grounded at low frequencies.
  • the anode on the other hand, is maintained positive by means of a battery 31 so that it tends to attract electrons emitted from the cathode.
  • they are deflected by means vof a uniform magnetic field directed axially of the cathode.
  • This field is provided by the combination of a coil I9 and an energizing battery 4I! and acts to produce orbital motion of the electrons leaving the cathode 30. The result, therefore, is to create a rotating space charge in the region between the cathode and the anode 30.
  • this space charge may be used tov control the wave-propagating characteristics of the structure formed by the conductors 23 and 24 and thus to modify the frequency of resonance and other operating properties of the structure.
  • This control may be accomplished either by varying the magnetic field, as by adjustment of the battery 40, or by including a source of variable potential in circuit with the anode 30.
  • the ability of the device 29 to control the wavepropagating characteristics of the structure with which it is associated depends in large part upon the influence of the rotating space charge developed Within the device on the dielectric constant of the region which the space charge occupies.
  • 'I'he dielectric constant of the chargelled region may be represented by the character K and is found to be variable with the applied magnetic eld H and the operating frequency w according to the following relationship:
  • the effect of adjusting the dielectric constant of the space charge within the device 29 is to modify the distributed capacitance of the portion of the wave-guiding structure which it employs, such portion becoming substantialiy non-capacitive when the dielectric constant is zero.
  • the effect of th'ese considerations on the wave-propagating properties of the resonant structure as' a ,whole is determined in part Iby the location of the device 29 and will be maximum when the device is at a voltage loop of the standing wave pattern existing in the structure.
  • the effect of the distributed series inductance may be neglected, and if distributed capacitance is also eliminated, the affected portion of the structure may be regarded as a region ofl zero impedance,. (the resistance being negligible).
  • 'I'his is equivalent to thev complete elimination of a section of the structure and will have results generally similar to those which would follow moving the short-circuiting conductive part 21 closer to the generator Hl. That is to say, reducing or eliminating the shunt 'capacitance of the region subtended by the device 29 by reducing the dielectric constant of its space charge vwill decrease the resonant Wave length of the ciated.
  • and the anode 30 may be varied by varying the physical extent of the space charge.v 'This may be done, for example, by changing the voltage impressed between' the anode and cathode.
  • the attendant variation of the radius a of the region occupied by' the space charge is given by the following relationship:
  • V represents the impressed voltage
  • b is the radius of the anode
  • the other quantities are those which have been previously identified in connection with Equation (l) Due to the relationship last referred to, it is readily feasible to operate the apparatus of Fig. 1 'as part of a system of frequency modulation. This may be done in one way by placing in the anode-cathode circuit of the device 29 a source 42 of variable voltage (e. g. an audio or video signal) with which it is desired to modulate the output of the high frequency ⁇ oscillator I0. Variations in the potential supplied by the source 42 will, in v accordance with the principles above described.
  • variable voltage e. g. an audio or video signal
  • the frequency modulated waves thus generated may be fed to an appropriate output system by any known means, such as an inductive loop 45 which is coupled to the space within the resonating structure and which is associated with va coaxial conductor transmission line having an inductive loop the output of this generator is fed into a wave-guiding structure generally similar to that described in connection with Fig. 1, the energy transfer being accomplished by placing the loop 5I in proximity to a second loop 52 which terminates the wave-guiding structure.
  • 'I'he structure itself includes an outer conductor 53 and an inner conductor which consists at one end of a thin tubular part 54 and at the other end of a fllamentary extension 55.
  • a magnetron device 55 Intermediate the ends of the structure there is provided a. magnetron device 55. lIhis encloses an electron-emissive cathode 51 which comprises a colinear extension of the conductor 54 and which is indirectly heated by current supplied to its heating .filament 51' from a battery 58 through a choke coil 59'. An anode 59 concentricaliy surounds the cathode 51 and is maintained positive with respect toit by means of a battery 60.
  • waves generated by the source 59 and propagated axially along the conductors 59 and 54 are caused to pass through the region subtended by the device 59 before they can be" transmitted to the other extremity of the transmitting system.
  • the waves so propagated are assumed to be fed to an appropri-ate output circuit as indicated by the legend appearing at the right hand end of Fig. 2.
  • the electrodes 51 and 59 may be regarded as electrically con tinuous parts of the conductors 54 and 55.
  • the dielectric constant of the region between the cathode 51 and the anode 59 departs from unity such region must be regarded as a discontinuity in the wave-prop agating system.
  • the character of the discontinuity is necessarily variable in accordance with such variations ras occur in the potential impressed between the electrodes, at lea-st insofar as such variations tend to vary the space charge characteristics.
  • the ability of the resonant structure as a whole to transmit wave energy of a particular frequency is found to be controllably variable in accordance wtih the signal variations of the voltage source 54. Assuming that the wave energy supplied to the system by the generator 50 is of constant magnitude, these changes in transmitting ability will manifest themselves as .an amplitude modulation of the signal received at the output circuit.
  • FIG. 3 shows its use as a means for matching the ⁇ impedances of two circuit elements between which it is desired to transfer power.
  • the energy-transferring means includes an outer tubular member 1
  • the antenna 10 is coupled to the space Within the member 1I by means of an inductive loop 19.
  • a magnetron device 15 which device includes an indirectly heated cathode 11 which is colinear with the conductor 12 and which is directly connected thereto -so as to form a conductive extension of lthe conductor. Heating current for the cathode is supplied through a direct current circuit which includes the combination of the tubular conductor 12 and another wire 18 insulatingly arranged within the hollow interior of the conductor 12. These conductors are terminally connected to a heating battery 90.
  • a .tubular anode 8l Surrounding lthe cathode 11 there is provided a .tubular anode 8l which is maintained at a xed positive potential with respect to the cathode by means of a battery 82. A magnetic field is produced axially of the magnetron device by means of a coil 83.
  • Fig. 4 there is shown an alternative arrangement useful for this same purpose.
  • the structure shown may be assumed to lconstitute the extremity of a modulating system such as that which is illustrated in Fig. 1. It includes a tubular conductor having .a lamentary conductor 9
  • Electrons are projected into the space between the conductor section 9
  • 02 permits at least some of the electrons generated by the cathode to be projected into the main space enclosed by the member 94.
  • 05 (Fig. 6) which is biased negatively with respect to the member 94 so that it tends to repel electrons coming through the opening
  • a component of rotary motion is imparted to the electrons by the action of lthe magnetic field-producing structure' 95 so that the electrons are caused to follow a more or less helical path as indicated by the dotted line A of Fig. 4.
  • the electrons move orbitally about the conductor 9 as an axis of gyration so that their aggregate effect is that of a rotating space charge comparable to the space charge created by other means in the de? vices of Figs. 1 to 3.
  • 01 in the nature of a control grid may be provided in connection with the cathode 91 (see Fig. 5).
  • This element which is shown as a circular ring, is maintained at a negative average potential with respect to the cathode 91 and is connected to a variable voltage source
  • variable space charge device is shown in Fig. 7, which illustrates the device apart from the wave-guiding structure with which it is intended to be used.
  • the construction of the device is similar to that described in connection with Fig. 4 in that it includes a conductor
  • 0 comprise portions of a parallel wire transmission line whose wave-propagating characteristics it is desired to control. As in the device of Fig. 4, such control may be accomplished by varying the space charge between the conductors by changing the number of electrons projected from the electron source.
  • FIG. 8 illustrates a closed envelope
  • 23 is assumed to'be of electron emissive character and is heated indirectly by means of a resistance heater
  • a difference of potential is maintained between the electrodes
  • 26 serves to assure limited motion of electrons emitted by the member 23 and to produce a space charge in the region between that electrode and the electrode
  • 23 serve asA components of ⁇ a parallel wire transmission line, the conductors of which are respectively indicated at
  • the wave-propagating properties of the line may be modified by varying the character of the space charge in the device
  • FIG. 9 illustrates its use in connection with a cavity resonator employed as a high frequency tankcircuit.
  • the tankv circuit is assumed to serve a high frequency oscillator which is coupled into ⁇ the resonator by an indue.. tive loop
  • the resonator itself consists of a hollow spherical metal body
  • the resonantfrequency of a structure such as that described is a function of the physical dimensions of the structure and depends upon the distributed electrical constants of the yparts which make up the structure.
  • a second wave responsive system which is itself of controllable character.
  • a system is shown as comprising a conductive tubular part
  • the direct current electrical connections to the electrode elements of the device are omitted, but it is assumed that they include means .for supplyingv heating current to the cathode
  • 38 is coupled to the region ericlosed by the hollow bodyl
  • Variations produced in this way will produce a corresponding change in the nature of the reaction of the auxiliary resonant structure
  • the resonant characteristics of the body may be adjusted to secure optimum cooperation with the oscillation generator with which the body is assumed to be connected.
  • Fig. represents the application in a modulating system of an arrangement similar to that of Fig. 9.
  • it is proposed to effect amplitude modulation by varying the transfer of wave energy between an input system connected to an inductive loop
  • both loops are coupled to the space enclosed by a hollow cavity resonator
  • the Wavepropagating characteristics of the resonator are controlled by means of a magnetron device
  • a source of high frequency electromagnetic waves a structure lfor propagating waves derived from said source and Having wave-propagating characteristics which are fixed mainly by the distributed constants of its component parts, an evacuated electronic device forming part of the said structure and having spaced electrodes the distributed constants of which determine to a significant degree the wave-propagating characteristics of the structure, means including a magnetic field-producing agency and a source of potential connected between the electrodes for maintaining in the space between them a rotating space charge which affects the distributed capacitance of the electrodes by its presence without producing appreciable current flow be tween the electrodes, the said space charge being variable in response to variations of the magnetic field and of the said potential, and means for controllably varying one of the lastnamed quantities in order correspondingly to modify the wave-propagating characteristics of the structure.
  • a source of high frequency electromagnetic waves a pair of elongated parallel conducting members along which waves from said source are propagated, the wave-propagating characteristics of the members being determined mainly by their distributed electrical constants
  • an evacuated electronic device including spaced conducting elements which, in effect. constitute parts of the said elongated members.
  • a source of high frequency electromagnetic waves a hollow conductive body which functions as a wave-propagating structure for waves derived from said source, an evacuated electronic device within the said body and including a pair of spaced conductive elements the distributed constants of which determine to a significant degree the wave-propagating characteristics of the body, the device having means for producing between the said spaced elements a rotating electronic space charge which affects the distributed constants of the elements by its presence without produc-- ing Iappreciable current flow between the elements, and means for varying the character of the said space charge in order correspondingly to modify the Wave-propagating characteristics of the said hollow body 4.
  • a source of ultra high frequency electromagnetic waves,l a structure which functions as a wave-guide for electromagnetic waves propagated from said source and which comprises an elongated inner conductor, a tubular outer conductor coaxial with said inner 4con-- ductor, an evacuated electronic device including an elongated conductive element serving as a part of the said inner conductor and a coaxially arranged tubular element forming, in effect, a part of the said outer conductor, means for producing a rotating electronic space charge in the region bounded by the said elements without producing appreciable current flowbetween the elements, and means for Varying the character of the said space charge in order correspondingly to modify the Wave-propagating characteristics of the structure as a whole.
  • a source of high frequency electromagnetic waves a pair of elongated parallel conductors along which waves from said source are propagated, an evacuated electronic idevice including an elongated linear cathode which serves as a part of'one of said conductors and which is electron-emissive throughout a substantial portion of its length, an anode parallel to said cathode and forming, in effect, a part of the other of-said conductors, means for producing an electric field between the said anode and cathode so as to establish a space charge in the region between them; meanslor producing a magnetic field -eiective to cause continuous rotation of the said space charge about the said cathode and thus t0 prevent appreciable current flow between the anode and cathode, and means for varying at least one of the said eldsin order to modify the characteristics of the space charge and correspondingly to change the wave-propagating characteristics of the said conductors.
  • a source of high frequency 'electromagnetic waves a structure which functions as a Wave-guide for waves derived from said source and which comprises an elongated inner conductor, a tubular outer conductor coaxial with said inner conductor, an evacuated electronic device including an elongated cathode which serves as a part lof the said inner conductor and a tubular anode surrounding the cathode and forming in eiect a part of the said outer conductor, means for producing an electric eld between the anode and cathode so as to establish a space charge between them, means for producing a magnetic field effective to cause continuous rotation of the said space charge about the cathode and thus to'prevent any appreciable current ow between the Ianode and cathode, and means for varying one of the said fields in order. to modify the characteristics of the said space charge and correspondingly to change the wave-propagating characteristics of the structure as a whole.
  • a wave-guiding structure having wave-propagating characteristics which are xed mainly by the distributed constants ofv its component parts
  • an evacuated electronic device forming part of the said structure and including a pair of elongated parallel conductive elements the distributed constants of which determine to a significant degree the wavepropagating characteristics of the structure
  • means for producing a stream of electrons which moves ralong a helical path coaxial with one of the said conductive elements and which affects the distributed capacitance of the elements by its presence without causing appreciable current flow between the said elements, and means for varying the said stream in order correspondingly to modify the wave-propagating characteristics of the said structure.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Microwave Tubes (AREA)
US331562A 1940-04-25 1940-04-25 High frequency apparatus Expired - Lifetime US2241976A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US331562A US2241976A (en) 1940-04-25 1940-04-25 High frequency apparatus
GB5344/41A GB555825A (en) 1940-04-25 1941-04-25 Improvements in high frequency apparatus embodying electron discharge tubes
FR872656D FR872656A (fr) 1940-04-25 1941-04-25 Perfectionnements aux magnétrons
CH224079D CH224079A (de) 1940-04-25 1941-10-30 Ultrahochfrequenzvorrichtung mit einer Übertragungsleitung, deren Übertragungseigenschaften veränderlich sind.
BE443575D BE443575A (xx) 1940-04-25 1941-12-02

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US331562A US2241976A (en) 1940-04-25 1940-04-25 High frequency apparatus

Publications (1)

Publication Number Publication Date
US2241976A true US2241976A (en) 1941-05-13

Family

ID=23294474

Family Applications (1)

Application Number Title Priority Date Filing Date
US331562A Expired - Lifetime US2241976A (en) 1940-04-25 1940-04-25 High frequency apparatus

Country Status (5)

Country Link
US (1) US2241976A (xx)
BE (1) BE443575A (xx)
CH (1) CH224079A (xx)
FR (1) FR872656A (xx)
GB (1) GB555825A (xx)

Cited By (95)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2425328A (en) * 1944-08-01 1947-08-12 Frederic A Jenks Switching and modulation system
US2436640A (en) * 1942-05-07 1948-02-24 Nils Georg Schonander Device for the frequency modulation of the resonant frequency of cavity resonators
US2438768A (en) * 1944-04-28 1948-03-30 Philco Corp Apparatus for varying the frequency of resonant cavities
US2439387A (en) * 1941-11-28 1948-04-13 Sperry Corp Electronic tuning control
US2445445A (en) * 1943-11-13 1948-07-20 Westinghouse Electric Corp Dual cavity-resonator switching system
US2446531A (en) * 1945-05-21 1948-08-10 Raytheon Mfg Co Electron discharge device
US2449451A (en) * 1944-09-28 1948-09-14 Westinghouse Electric Corp High-frequency dielectric heating apparatus
US2452272A (en) * 1944-10-28 1948-10-26 Philco Corp Magnetron
US2452077A (en) * 1944-01-19 1948-10-26 Raytheon Mfg Co Electric discharge device
US2453453A (en) * 1945-02-26 1948-11-09 Rca Corp Frequency modulation system
US2462367A (en) * 1945-01-25 1949-02-22 Forest Lee De Frequency modulating device
US2463472A (en) * 1945-03-16 1949-03-01 Premier Crystal Lab Inc Cavity resonator
US2468243A (en) * 1945-05-07 1949-04-26 Raytheon Mfg Co Electron discharge device
US2470023A (en) * 1944-11-01 1949-05-10 Farnsworth Res Corp Modulating system
US2471744A (en) * 1944-05-29 1949-05-31 Rca Corp Method of and means for measuring microwave power
US2472200A (en) * 1945-08-08 1949-06-07 Everhart Edgar Variable frequency magnetron circuit
US2473567A (en) * 1945-03-20 1949-06-21 Raytheon Mfg Co Electronic discharge device
US2473535A (en) * 1941-04-04 1949-06-21 Sperry Corp Switching and modulation system
US2474485A (en) * 1944-09-14 1949-06-28 Bell Telephone Labor Inc Magnetron oscillator
US2477317A (en) * 1945-03-21 1949-07-26 Raytheon Mfg Co Electron discharge device
US2483768A (en) * 1944-06-15 1949-10-04 Rca Corp Microwave-acoustic wave translator
US2490007A (en) * 1947-03-15 1949-11-29 Gen Electric Frequency controllable magnetron system
US2498577A (en) * 1945-12-17 1950-02-21 William R Rambo Combined oscillator and reactance tube structure
US2501545A (en) * 1946-03-26 1950-03-21 Rca Corp Frequency modulation system
US2504739A (en) * 1944-09-27 1950-04-18 Westinghouse Electric Corp Electron discharge device having a cavity resonator provided with a tuning electrode
US2505240A (en) * 1947-04-22 1950-04-25 Raytheon Mfg Co Frequency-modulating apparatus
US2510026A (en) * 1946-04-05 1950-05-30 Rca Corp Frequency modulation system for microwave generators
US2511106A (en) * 1942-05-07 1950-06-13 Fredholm Johan Olof Helge Gas-filled cavity resonator
US2519826A (en) * 1945-04-30 1950-08-22 Raytheon Mfg Co Electron discharge device
US2523286A (en) * 1945-05-12 1950-09-26 Gen Electric High-frequency electrical apparatus
US2528241A (en) * 1947-01-02 1950-10-31 Gen Electric Frequency controllable magnetron
US2527770A (en) * 1945-10-10 1950-10-31 William V Smith Magnetron pilot cavity resonator
US2530185A (en) * 1944-11-04 1950-11-14 Westinghouse Electric Corp Electron discharge device
US2532157A (en) * 1944-10-31 1950-11-28 Rca Corp Variable reactive microwave device
US2534503A (en) * 1947-06-28 1950-12-19 Rca Corp Frequency-modulated magnetron microwave generator
US2535793A (en) * 1946-01-08 1950-12-26 Rca Corp Magnetron
US2537112A (en) * 1945-08-20 1951-01-09 Sperry Corp High-frequency tube structure
US2538087A (en) * 1944-12-26 1951-01-16 Raytheon Mfg Co Electron discharge device of the magnetron type
US2546952A (en) * 1946-02-27 1951-03-27 Raytheon Mfg Co Electrical system
US2547659A (en) * 1947-05-07 1951-04-03 Gen Electric Grid controlled magnetron apparatus for frequency controllable systems
US2557882A (en) * 1947-03-21 1951-06-19 Fr Sadir Carpentier Soc Modulating system
US2568403A (en) * 1949-10-17 1951-09-18 Westinghouse Electric Corp Electrical time delay apparatus
US2576601A (en) * 1949-10-06 1951-11-27 Earl E Hays Method of accelerating ions
US2579654A (en) * 1947-06-04 1951-12-25 Raytheon Mfg Co Electron-discharge device for microwave amplification
US2589903A (en) * 1946-03-04 1952-03-18 Us Sec War Tunable magnetron oscillator
US2591350A (en) * 1947-04-26 1952-04-01 Raytheon Mfg Co Traveling-wave electron reaction device
US2591976A (en) * 1945-03-22 1952-04-08 Rca Corp Electron discharge device utilizing cavity resonators
US2600509A (en) * 1947-08-01 1952-06-17 Cie Generale De T S F Traveling wave tube
US2602156A (en) * 1947-06-28 1952-07-01 Rca Corp Modulated microwave generator
US2606249A (en) * 1945-05-02 1952-08-05 Bruce B Cork Tunable cavity resonator transmitreceive device
US2617079A (en) * 1944-08-08 1952-11-04 Westinghouse Electric Corp Tunable magnetron
US2623129A (en) * 1948-06-12 1952-12-23 Csf Thermionic tube for amplification of ultrashort electric waves
US2639404A (en) * 1945-04-03 1953-05-19 Us Sec War Magnetron circuit
US2643353A (en) * 1948-11-04 1953-06-23 Int Standard Electric Corp Traveling wave tube
US2650956A (en) * 1946-12-24 1953-09-01 Bell Telephone Labor Inc Amplifier utilizing deflection of an electron beam
US2651686A (en) * 1947-03-27 1953-09-08 Int Standard Electric Corp Traveling wave amplifier
US2667597A (en) * 1948-06-14 1954-01-26 Int Standard Electric Corp Velocity modulated electron discharge device
US2671884A (en) * 1950-09-19 1954-03-09 Gen Precision Lab Inc Microwave magnetic control
US2683251A (en) * 1942-08-13 1954-07-06 Gen Electric High-frequency electromagnetic wave transmission system
US2687494A (en) * 1949-05-10 1954-08-24 Zenith Radio Corp Signal translating device of the traveling wave type
US2688106A (en) * 1948-07-20 1954-08-31 Csf Traveling wave amplifying tube with a magnetic field
US2687777A (en) * 1948-07-20 1954-08-31 Csf Thermionic tube for ultrashort waves
US2695373A (en) * 1944-11-16 1954-11-23 Rca Corp Cavity resonator high-frequency apparatus
US2695973A (en) * 1949-10-27 1954-11-30 Univ Leland Stanford Junior Reflex traveling wave amplifier
US2697799A (en) * 1948-12-01 1954-12-21 Ericsson Telefon Ab L M Amplifying device for microwaves
US2710919A (en) * 1950-05-03 1955-06-14 Beverly D Kumpfer Electronic tuning means
US2730648A (en) * 1949-02-04 1956-01-10 Csf Travelling-wave tube
US2735958A (en) * 1956-02-21 Electron discharge device of the
US2738422A (en) * 1950-08-25 1956-03-13 Rca Corp Frequency control
US2752523A (en) * 1951-05-15 1956-06-26 Int Standard Electric Corp Electron discharge apparatus
US2760111A (en) * 1950-06-28 1956-08-21 Beverly D Kumpfer Magnetron amplifier
US2762950A (en) * 1951-04-16 1956-09-11 Rca Corp High frequency apparatus
US2768328A (en) * 1946-11-05 1956-10-23 Bell Telephone Labor Inc High frequency electronic device
US2770754A (en) * 1950-01-20 1956-11-13 Csf Transverse field travelling wave tube
US2772377A (en) * 1951-08-29 1956-11-27 Kazan Benjamin Device for electronically controlling the propagation of radio frequency power
US2774914A (en) * 1951-02-19 1956-12-18 English Electric Valve Co Ltd Magnetrons
US2776389A (en) * 1950-11-01 1957-01-01 Rca Corp Electron beam tubes
US2781476A (en) * 1944-11-16 1957-02-12 Rca Corp Magnetron
US2787734A (en) * 1949-06-10 1957-04-02 Int Standard Electric Corp Broadband magnetron
US2791711A (en) * 1951-08-24 1957-05-07 Research Corp Apparatus for generating hollow electron beams
US2791717A (en) * 1950-03-13 1957-05-07 Csf Travelling wave tube with crossed electric and magnetic fields and transversely directed beam
US2794151A (en) * 1950-05-03 1957-05-28 Beverly D Kumpfer Electronic tuning means
US2794935A (en) * 1953-05-19 1957-06-04 Csf Modulating devices for tubes having crossed electric and magnetic fields
US2795760A (en) * 1953-01-30 1957-06-11 Raytheon Mfg Co Amplitude modulators
US2801361A (en) * 1948-12-10 1957-07-30 Bell Telephone Labor Inc High frequency amplifier
US2806976A (en) * 1952-11-26 1957-09-17 Karl G Hernqvist Impedance matching device
US2813221A (en) * 1950-10-02 1957-11-12 Rca Corp Electron beam traveling-wave tube
US2830221A (en) * 1951-10-01 1958-04-08 Rca Corp Traveling wave tubes
US2832050A (en) * 1945-03-22 1958-04-22 Rca Corp Electron discharge devices
US2840757A (en) * 1957-03-20 1958-06-24 Raytheon Mfg Co Electron discharge device
US2888610A (en) * 1953-12-16 1959-05-26 Raytheon Mfg Co Traveling wave tubes
US2912619A (en) * 1954-04-22 1959-11-10 Emi Ltd High frequency apparatus
US3041543A (en) * 1955-01-06 1962-06-26 Itt Wave detector
US3076917A (en) * 1959-05-05 1963-02-05 Thomson Houston Comp Francaise Electronic tuning devices for klystron valves
US3129356A (en) * 1959-05-28 1964-04-14 Gen Electric Fast electromagnetic wave and undulating electron beam interaction structure

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT454356A (xx) * 1948-07-29
BE512176A (xx) * 1951-06-18
US2935702A (en) * 1956-05-15 1960-05-03 Merrimac Res And Dev Corp Coaxial microwave hybrid structures
GB2152741B (en) * 1980-04-28 1986-02-12 Emi Varian Ltd Producing an electron beam

Cited By (95)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2735958A (en) * 1956-02-21 Electron discharge device of the
US2473535A (en) * 1941-04-04 1949-06-21 Sperry Corp Switching and modulation system
US2439387A (en) * 1941-11-28 1948-04-13 Sperry Corp Electronic tuning control
US2436640A (en) * 1942-05-07 1948-02-24 Nils Georg Schonander Device for the frequency modulation of the resonant frequency of cavity resonators
US2511106A (en) * 1942-05-07 1950-06-13 Fredholm Johan Olof Helge Gas-filled cavity resonator
US2683251A (en) * 1942-08-13 1954-07-06 Gen Electric High-frequency electromagnetic wave transmission system
US2445445A (en) * 1943-11-13 1948-07-20 Westinghouse Electric Corp Dual cavity-resonator switching system
US2452077A (en) * 1944-01-19 1948-10-26 Raytheon Mfg Co Electric discharge device
US2438768A (en) * 1944-04-28 1948-03-30 Philco Corp Apparatus for varying the frequency of resonant cavities
US2471744A (en) * 1944-05-29 1949-05-31 Rca Corp Method of and means for measuring microwave power
US2483768A (en) * 1944-06-15 1949-10-04 Rca Corp Microwave-acoustic wave translator
US2425328A (en) * 1944-08-01 1947-08-12 Frederic A Jenks Switching and modulation system
US2617079A (en) * 1944-08-08 1952-11-04 Westinghouse Electric Corp Tunable magnetron
US2474485A (en) * 1944-09-14 1949-06-28 Bell Telephone Labor Inc Magnetron oscillator
US2504739A (en) * 1944-09-27 1950-04-18 Westinghouse Electric Corp Electron discharge device having a cavity resonator provided with a tuning electrode
US2449451A (en) * 1944-09-28 1948-09-14 Westinghouse Electric Corp High-frequency dielectric heating apparatus
US2452272A (en) * 1944-10-28 1948-10-26 Philco Corp Magnetron
US2532157A (en) * 1944-10-31 1950-11-28 Rca Corp Variable reactive microwave device
US2470023A (en) * 1944-11-01 1949-05-10 Farnsworth Res Corp Modulating system
US2530185A (en) * 1944-11-04 1950-11-14 Westinghouse Electric Corp Electron discharge device
US2695373A (en) * 1944-11-16 1954-11-23 Rca Corp Cavity resonator high-frequency apparatus
US2781476A (en) * 1944-11-16 1957-02-12 Rca Corp Magnetron
US2538087A (en) * 1944-12-26 1951-01-16 Raytheon Mfg Co Electron discharge device of the magnetron type
US2462367A (en) * 1945-01-25 1949-02-22 Forest Lee De Frequency modulating device
US2453453A (en) * 1945-02-26 1948-11-09 Rca Corp Frequency modulation system
US2463472A (en) * 1945-03-16 1949-03-01 Premier Crystal Lab Inc Cavity resonator
US2473567A (en) * 1945-03-20 1949-06-21 Raytheon Mfg Co Electronic discharge device
US2477317A (en) * 1945-03-21 1949-07-26 Raytheon Mfg Co Electron discharge device
US2591976A (en) * 1945-03-22 1952-04-08 Rca Corp Electron discharge device utilizing cavity resonators
US2832050A (en) * 1945-03-22 1958-04-22 Rca Corp Electron discharge devices
US2639404A (en) * 1945-04-03 1953-05-19 Us Sec War Magnetron circuit
US2519826A (en) * 1945-04-30 1950-08-22 Raytheon Mfg Co Electron discharge device
US2606249A (en) * 1945-05-02 1952-08-05 Bruce B Cork Tunable cavity resonator transmitreceive device
US2468243A (en) * 1945-05-07 1949-04-26 Raytheon Mfg Co Electron discharge device
US2523286A (en) * 1945-05-12 1950-09-26 Gen Electric High-frequency electrical apparatus
US2446531A (en) * 1945-05-21 1948-08-10 Raytheon Mfg Co Electron discharge device
US2472200A (en) * 1945-08-08 1949-06-07 Everhart Edgar Variable frequency magnetron circuit
US2537112A (en) * 1945-08-20 1951-01-09 Sperry Corp High-frequency tube structure
US2527770A (en) * 1945-10-10 1950-10-31 William V Smith Magnetron pilot cavity resonator
US2498577A (en) * 1945-12-17 1950-02-21 William R Rambo Combined oscillator and reactance tube structure
US2535793A (en) * 1946-01-08 1950-12-26 Rca Corp Magnetron
US2546952A (en) * 1946-02-27 1951-03-27 Raytheon Mfg Co Electrical system
US2589903A (en) * 1946-03-04 1952-03-18 Us Sec War Tunable magnetron oscillator
US2501545A (en) * 1946-03-26 1950-03-21 Rca Corp Frequency modulation system
US2510026A (en) * 1946-04-05 1950-05-30 Rca Corp Frequency modulation system for microwave generators
US2768328A (en) * 1946-11-05 1956-10-23 Bell Telephone Labor Inc High frequency electronic device
US2650956A (en) * 1946-12-24 1953-09-01 Bell Telephone Labor Inc Amplifier utilizing deflection of an electron beam
US2528241A (en) * 1947-01-02 1950-10-31 Gen Electric Frequency controllable magnetron
US2490007A (en) * 1947-03-15 1949-11-29 Gen Electric Frequency controllable magnetron system
US2557882A (en) * 1947-03-21 1951-06-19 Fr Sadir Carpentier Soc Modulating system
US2651686A (en) * 1947-03-27 1953-09-08 Int Standard Electric Corp Traveling wave amplifier
US2505240A (en) * 1947-04-22 1950-04-25 Raytheon Mfg Co Frequency-modulating apparatus
US2591350A (en) * 1947-04-26 1952-04-01 Raytheon Mfg Co Traveling-wave electron reaction device
US2547659A (en) * 1947-05-07 1951-04-03 Gen Electric Grid controlled magnetron apparatus for frequency controllable systems
US2579654A (en) * 1947-06-04 1951-12-25 Raytheon Mfg Co Electron-discharge device for microwave amplification
US2602156A (en) * 1947-06-28 1952-07-01 Rca Corp Modulated microwave generator
US2534503A (en) * 1947-06-28 1950-12-19 Rca Corp Frequency-modulated magnetron microwave generator
US2600509A (en) * 1947-08-01 1952-06-17 Cie Generale De T S F Traveling wave tube
US2623129A (en) * 1948-06-12 1952-12-23 Csf Thermionic tube for amplification of ultrashort electric waves
US2667597A (en) * 1948-06-14 1954-01-26 Int Standard Electric Corp Velocity modulated electron discharge device
US2687777A (en) * 1948-07-20 1954-08-31 Csf Thermionic tube for ultrashort waves
US2688106A (en) * 1948-07-20 1954-08-31 Csf Traveling wave amplifying tube with a magnetic field
US2643353A (en) * 1948-11-04 1953-06-23 Int Standard Electric Corp Traveling wave tube
US2697799A (en) * 1948-12-01 1954-12-21 Ericsson Telefon Ab L M Amplifying device for microwaves
US2801361A (en) * 1948-12-10 1957-07-30 Bell Telephone Labor Inc High frequency amplifier
US2730648A (en) * 1949-02-04 1956-01-10 Csf Travelling-wave tube
US2687494A (en) * 1949-05-10 1954-08-24 Zenith Radio Corp Signal translating device of the traveling wave type
US2787734A (en) * 1949-06-10 1957-04-02 Int Standard Electric Corp Broadband magnetron
US2576601A (en) * 1949-10-06 1951-11-27 Earl E Hays Method of accelerating ions
US2568403A (en) * 1949-10-17 1951-09-18 Westinghouse Electric Corp Electrical time delay apparatus
US2695973A (en) * 1949-10-27 1954-11-30 Univ Leland Stanford Junior Reflex traveling wave amplifier
US2770754A (en) * 1950-01-20 1956-11-13 Csf Transverse field travelling wave tube
US2791717A (en) * 1950-03-13 1957-05-07 Csf Travelling wave tube with crossed electric and magnetic fields and transversely directed beam
US2710919A (en) * 1950-05-03 1955-06-14 Beverly D Kumpfer Electronic tuning means
US2794151A (en) * 1950-05-03 1957-05-28 Beverly D Kumpfer Electronic tuning means
US2760111A (en) * 1950-06-28 1956-08-21 Beverly D Kumpfer Magnetron amplifier
US2738422A (en) * 1950-08-25 1956-03-13 Rca Corp Frequency control
US2671884A (en) * 1950-09-19 1954-03-09 Gen Precision Lab Inc Microwave magnetic control
US2813221A (en) * 1950-10-02 1957-11-12 Rca Corp Electron beam traveling-wave tube
US2776389A (en) * 1950-11-01 1957-01-01 Rca Corp Electron beam tubes
US2774914A (en) * 1951-02-19 1956-12-18 English Electric Valve Co Ltd Magnetrons
US2762950A (en) * 1951-04-16 1956-09-11 Rca Corp High frequency apparatus
US2752523A (en) * 1951-05-15 1956-06-26 Int Standard Electric Corp Electron discharge apparatus
US2791711A (en) * 1951-08-24 1957-05-07 Research Corp Apparatus for generating hollow electron beams
US2772377A (en) * 1951-08-29 1956-11-27 Kazan Benjamin Device for electronically controlling the propagation of radio frequency power
US2830221A (en) * 1951-10-01 1958-04-08 Rca Corp Traveling wave tubes
US2806976A (en) * 1952-11-26 1957-09-17 Karl G Hernqvist Impedance matching device
US2795760A (en) * 1953-01-30 1957-06-11 Raytheon Mfg Co Amplitude modulators
US2794935A (en) * 1953-05-19 1957-06-04 Csf Modulating devices for tubes having crossed electric and magnetic fields
US2888610A (en) * 1953-12-16 1959-05-26 Raytheon Mfg Co Traveling wave tubes
US2912619A (en) * 1954-04-22 1959-11-10 Emi Ltd High frequency apparatus
US3041543A (en) * 1955-01-06 1962-06-26 Itt Wave detector
US2840757A (en) * 1957-03-20 1958-06-24 Raytheon Mfg Co Electron discharge device
US3076917A (en) * 1959-05-05 1963-02-05 Thomson Houston Comp Francaise Electronic tuning devices for klystron valves
US3129356A (en) * 1959-05-28 1964-04-14 Gen Electric Fast electromagnetic wave and undulating electron beam interaction structure

Also Published As

Publication number Publication date
BE443575A (xx) 1942-02-28
GB555825A (en) 1943-09-09
CH224079A (de) 1942-10-31
FR872656A (fr) 1942-06-16

Similar Documents

Publication Publication Date Title
US2241976A (en) High frequency apparatus
US2217745A (en) Ultra high frequency oscillation circuits
US2222902A (en) High frequency apparatus
US2409222A (en) Electron discharge device
US2531972A (en) Ultra short wave transmitting tube
US2424886A (en) Magnetron
US2413385A (en) Electron discharge device of the magnetron type
US2128234A (en) Electron tube
US2108900A (en) Ultrashort wave oscillation generator circuit
US2216169A (en) Oscillator
US2468243A (en) Electron discharge device
US2446531A (en) Electron discharge device
US2436397A (en) Ultra high frequency oscillator
US2434704A (en) Electric space discharge circuits
US2444194A (en) Frequency stabilization system
US2673900A (en) High-frequency amplifying device
US2560859A (en) Method for modulating the highfrequency energy transmitted in hollow dielectric guides
US2748277A (en) Magnetron noise generators
US2476725A (en) Ultra high frequency oscillator device
US2393284A (en) Ultra short wave system
US2233482A (en) Anode tank circuit oscillator
US2623129A (en) Thermionic tube for amplification of ultrashort electric waves
US2079248A (en) Ultra high frequency magnetron discharge tube circuit
US2863092A (en) Magnetron oscillators
US2579820A (en) Ultrahigh-frequency system employing neutralizing probes