US2843789A - Arrangement for magnetic beam concentration - Google Patents

Arrangement for magnetic beam concentration Download PDF

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US2843789A
US2843789A US366288A US36628853A US2843789A US 2843789 A US2843789 A US 2843789A US 366288 A US366288 A US 366288A US 36628853 A US36628853 A US 36628853A US 2843789 A US2843789 A US 2843789A
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magnetic
arrangement
coil
magnetic beam
beam concentration
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US366288A
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Klein Werner
Friz Walter
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International Standard Electric Corp
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International Standard Electric Corp
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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
    • H01J23/02—Electrodes; Magnetic control means; Screens
    • H01J23/08—Focusing arrangements, e.g. for concentrating stream of electrons, for preventing spreading of stream
    • H01J23/087—Magnetic focusing arrangements
    • H01J23/0876—Magnetic focusing arrangements with arrangements improving the linearity and homogeniety of the axial field, e.g. field straightener
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/14—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by electrical means
    • B05D3/141—Plasma treatment
    • B05D3/142—Pretreatment
    • B05D3/144—Pretreatment of polymeric substrates
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G81/00—Macromolecular compounds obtained by interreacting polymers in the absence of monomers, e.g. block polymers
    • C08G81/02—Macromolecular compounds obtained by interreacting polymers in the absence of monomers, e.g. block polymers at least one of the polymers being obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • C08G81/021—Block or graft polymers containing only sequences of polymers of C08C or C08F
    • C08G81/022—Block or graft polymers containing only sequences of polymers of C08C or C08F containing sequences of polymers of conjugated dienes and of polymers of alkenyl aromatic compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/0427—Coating with only one layer of a composition containing a polymer binder
    • 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
    • H01J23/02—Electrodes; Magnetic control means; Screens
    • H01J23/06—Electron or ion guns
    • H01J23/065—Electron or ion guns producing a solid cylindrical beam
    • 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
    • H01J23/02—Electrodes; Magnetic control means; Screens
    • H01J23/08—Focusing arrangements, e.g. for concentrating stream of electrons, for preventing spreading of stream
    • H01J23/083—Electrostatic focusing arrangements
    • 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
    • H01J23/02—Electrodes; Magnetic control means; Screens
    • H01J23/08—Focusing arrangements, e.g. for concentrating stream of electrons, for preventing spreading of stream
    • H01J23/087—Magnetic focusing arrangements
    • 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
    • H01J23/24—Slow-wave structures, e.g. delay systems
    • H01J23/26—Helical slow-wave structures; Adjustment therefor
    • 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
    • H01J23/24—Slow-wave structures, e.g. delay systems
    • H01J23/30—Damping arrangements associated with slow-wave structures, e.g. for suppression of unwanted oscillations
    • 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
    • H01J23/36—Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy
    • H01J23/40—Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy to or from the interaction circuit
    • H01J23/42—Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy to or from the interaction circuit the interaction circuit being a helix or a helix-derived slow-wave structure
    • 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
    • H01J23/36—Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy
    • H01J23/40—Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy to or from the interaction circuit
    • H01J23/48—Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy to or from the interaction circuit for linking interaction circuit with coaxial lines; Devices of the coupled helices type
    • H01J23/50—Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy to or from the interaction circuit for linking interaction circuit with coaxial lines; Devices of the coupled helices type the interaction circuit being a helix or derived from a helix
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
    • H01J25/34—Travelling-wave tubes; Tubes in which a travelling wave is simulated at spaced gaps
    • H01J25/36—Tubes in which an electron stream interacts with a wave travelling along a delay line or equivalent sequence of impedance elements, and without magnet system producing an H-field crossing the E-field
    • H01J25/38—Tubes in which an electron stream interacts with a wave travelling along a delay line or equivalent sequence of impedance elements, and without magnet system producing an H-field crossing the E-field the forward travelling wave being utilised
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P5/00—Coupling devices of the waveguide type
    • H01P5/08—Coupling devices of the waveguide type for linking dissimilar lines or devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q11/00—Electrically-long antennas having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements
    • H01Q11/02—Non-resonant antennas, e.g. travelling-wave antenna
    • H01Q11/08—Helical antennas
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/30—Angle modulation by means of transit-time tube
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H2/00—Networks using elements or techniques not provided for in groups H03H3/00 - H03H21/00
    • H03H2/005—Coupling circuits between transmission lines or antennas and transmitters, receivers or amplifiers
    • H03H2/006—Transmitter or amplifier output circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M5/00—Manual exchanges
    • H04M5/04—Arrangements for indicating calls or supervising connections for calling or clearing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2327/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
    • C08J2327/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
    • C08J2327/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
    • C08J2327/06—Homopolymers or copolymers of vinyl chloride
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2429/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer

Definitions

  • This invention relates to a magnetic beam focusing arrangement particularly for use in traveling wave tubes.
  • Magnetic fields have been widely used in traveling wave tubes for concentrating the electron beam.
  • the magnetic field is generated by a coil surrounding the beam along its entire path, but in the case of traveling wave tubes, the coil must be interrupted to allow for wave input and output coupling means, and in most cases the coil consists of three separate portions. In the spaces be tween the three coil portions, the field is no longer uniform.
  • the deviations of the magnetic field and the non-uniformity of the field was decreased by making coils whose inner radius was large in comparison with the beam diameter. This required use of large coils with their attendant high direct current losses and heavy copper weights.
  • the object of the present invention is the provision of improved means for diminishing the disturbances in magnetic fields which are intended to be uniform and have one direction of flux.
  • a sheath or cylindrical mantle of paramagnetic or ferromagnetic material of low permeability be arranged between the magnetic coil or parts of the magnetic coil and the electron beam.
  • the thickness of the mantle of course depends on the desired permeability and the material used.
  • the magnetic coil in correspondence to its decreased inner diameter, will become smaller, and although the intensity of the internal flux field will be somewhat diminished by the mantle, this is easily overcome by a slight increase of total flux flow in order to obtain the required field intensity.
  • the magnetizing power required will be considerably reduced as compared with the known arrangements. Dimensions and weight of the magnetic coil will likewise be reduced.
  • the magnetic field will remain uniform in the region of the electron beam even in the spaces between the coils and between the portions of the cylindrical mantle. Furthermore the effect of minor irregularities in the winding of the coils will be overcome by the cylindrical mantles.
  • the cylindrical mantle is made of a material that has good attenuation for the highest frequencies, for example of a ferromagnetic substance like carbonyl iron. This may be in compressed powder form.
  • This cylindrical mantle then serves to increase the attenuation of the wave travelling along the travelling wave tube transmission line, which may be for example, a helix.
  • the cylindrical mantle can also be made of iron or nickel or any other ferromagnetic or paramagnetic materials. Since the cylindrical mantle lies between the helix and the magnetic coil, optimum attenuation will be obtained by an appropriate selection of the distance be tween the helix, the envelope of the travelling wave tube and the cylindrical mantle. This attenuation varies with frequency and increases with decreasing frequency since for lower frequencies the electromagnetic field around the helix will extend in greater measure into the surrounding space. This acts to suppress the tendency of the travelling wave tubes to oscillate at lower frequencies.
  • a traveling wave tube 1 has an electron beam path 2 surrounded by a helix 3 with input and output coupling means 4 and 5.
  • the beam is concentrated by magnetic coil portions 6 which closely surround the cylindrical mantle portions '7, the latter lying directly against the glass bulb of the tube.
  • a traveling wave tube amplifier comprising means for producing an electron beam, transmission means for propagating an electromagnetic wave parallel to and adjacent said beam, an enclosing envelope for said transmission means and said wave propagating means, input and output couplers at the ends of said transmission means, and means for concentrating said beam and for attenuating unwanted high frequency components produced in operation of said tube, comprising a sheath of paramagnetic material having a high attenuation factor for said unwanted high frequency waves, external of said envelope but closely adjacent thereto, and a magnetic beam concentrating coil surrounding said sheath substantially throughout the length of said tube.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Signal Processing (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Plasma & Fusion (AREA)
  • Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Microwave Tubes (AREA)
  • Waveguides (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Communication Cables (AREA)
  • Details Of Aerials (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
  • Particle Accelerators (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)

Description

y 1958 w. KLEIN ETAL 2,843,789
ARRANGEMENT FOR MAGNETIC BEAM CONCENTRATION Filed July e, 1953 ATTORNEY United States Patent ARRANGEMENT FOR MAGNETIC BEAM CONCENTRATION Werner Klein, Korntal, and Walter Friz, Stuttgart, Germany, assignors to International Standard Electric Corporation, New York, N. Y., a corporation of Delaware Application July 6, 1953, Serial No. 366,288
Claims priority, application Germany July 5, 1952 1 Claim. (Cl. 315-35) This invention relates to a magnetic beam focusing arrangement particularly for use in traveling wave tubes.
Magnetic fields have been widely used in traveling wave tubes for concentrating the electron beam. The magnetic field is generated by a coil surrounding the beam along its entire path, but in the case of traveling wave tubes, the coil must be interrupted to allow for wave input and output coupling means, and in most cases the coil consists of three separate portions. In the spaces be tween the three coil portions, the field is no longer uniform. In known structures the deviations of the magnetic field and the non-uniformity of the field was decreased by making coils whose inner radius was large in comparison with the beam diameter. This required use of large coils with their attendant high direct current losses and heavy copper weights. The object of the present invention is the provision of improved means for diminishing the disturbances in magnetic fields which are intended to be uniform and have one direction of flux.
In accordance with a feature of the present invention it is proposed that a sheath or cylindrical mantle of paramagnetic or ferromagnetic material of low permeability be arranged between the magnetic coil or parts of the magnetic coil and the electron beam. The thickness of the mantle of course depends on the desired permeability and the material used. The magnetic coil, in correspondence to its decreased inner diameter, will become smaller, and although the intensity of the internal flux field will be somewhat diminished by the mantle, this is easily overcome by a slight increase of total flux flow in order to obtain the required field intensity. By this arrangement the magnetizing power required will be considerably reduced as compared with the known arrangements. Dimensions and weight of the magnetic coil will likewise be reduced. By appropriate selection of the thickness of the cylindrical mantle and its permeability, the magnetic field will remain uniform in the region of the electron beam even in the spaces between the coils and between the portions of the cylindrical mantle. Furthermore the effect of minor irregularities in the winding of the coils will be overcome by the cylindrical mantles.
In accordance with a further aspect of the present invention, the cylindrical mantle is made of a material that has good attenuation for the highest frequencies, for example of a ferromagnetic substance like carbonyl iron. This may be in compressed powder form. This cylindrical mantle then serves to increase the attenuation of the wave travelling along the travelling wave tube transmission line, which may be for example, a helix. Naturally the cylindrical mantle can also be made of iron or nickel or any other ferromagnetic or paramagnetic materials. Since the cylindrical mantle lies between the helix and the magnetic coil, optimum attenuation will be obtained by an appropriate selection of the distance be tween the helix, the envelope of the travelling wave tube and the cylindrical mantle. This attenuation varies with frequency and increases with decreasing frequency since for lower frequencies the electromagnetic field around the helix will extend in greater measure into the surrounding space. This acts to suppress the tendency of the travelling wave tubes to oscillate at lower frequencies.
The above-mentioned and other features and objects of this invention and the manner of attaining them will become more apparent and the invention itself Will be best understood, by reference to the following description of an embodiment of the invention taken in conjunction with the accompanying drawings, in which there is disclosed a schematic diagram of a traveling wave tube.
Referring now to the drawing, a traveling wave tube 1 has an electron beam path 2 surrounded by a helix 3 with input and output coupling means 4 and 5. The beam is concentrated by magnetic coil portions 6 which closely surround the cylindrical mantle portions '7, the latter lying directly against the glass bulb of the tube. In one embodiment of the foregoing invention it was possible to obtain a reduction from 30 kg. to 8 kg. in the: weight of the copper wire with equal uniformity of the beam.
While we have described above the principles of our invention in connection with specific apparatus, it is to be clearly understood that this description is made only by way of example and not as a limitation to the scope of our invention as set forth in the objects thereof and in the accompanying claim.
What is claimed is:
A traveling wave tube amplifier comprising means for producing an electron beam, transmission means for propagating an electromagnetic wave parallel to and adjacent said beam, an enclosing envelope for said transmission means and said wave propagating means, input and output couplers at the ends of said transmission means, and means for concentrating said beam and for attenuating unwanted high frequency components produced in operation of said tube, comprising a sheath of paramagnetic material having a high attenuation factor for said unwanted high frequency waves, external of said envelope but closely adjacent thereto, and a magnetic beam concentrating coil surrounding said sheath substantially throughout the length of said tube.
References Cited in the file of this patent UNITED STATES PATENTS 2,259,531 Miller et a1 Oct. 21, 1941 2,602,148 Pierce July 1, 1952 2,679,019 Lindenblad May 18, 1954
US366288A 1952-04-08 1953-07-06 Arrangement for magnetic beam concentration Expired - Lifetime US2843789A (en)

Applications Claiming Priority (18)

Application Number Priority Date Filing Date Title
US776923XA 1952-04-08 1952-04-08
DE316934X 1952-04-08
DE734963X 1952-07-05
US740852XA 1952-08-19 1952-08-19
US778846XA 1952-08-19 1952-08-19
US773393XA 1952-08-21 1952-08-21
US773783XA 1952-08-23 1952-08-23
US777224XA 1952-09-29 1952-09-29
US777225XA 1952-10-11 1952-10-11
US773394XA 1952-10-31 1952-10-31
DE745099X 1952-11-07
US756370XA 1952-11-19 1952-11-19
US754861XA 1953-04-01 1953-04-01
DE780806X 1953-04-18
DE771189X 1953-11-27
DE767078X 1954-04-03
US861229XA 1956-10-26 1956-10-26
US886318XA 1957-05-03 1957-05-03

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US2843789A true US2843789A (en) 1958-07-15

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US366288A Expired - Lifetime US2843789A (en) 1952-04-08 1953-07-06 Arrangement for magnetic beam concentration
US390688A Expired - Lifetime US2812469A (en) 1952-04-08 1953-11-06 Travelling wave tube arrangement
US423076A Expired - Lifetime US2911599A (en) 1952-04-08 1954-04-14 Attenuation for traveling-wave tubes
US499163A Expired - Lifetime US2857547A (en) 1952-04-08 1955-04-04 Traveling wave tube

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Application Number Title Priority Date Filing Date
US390688A Expired - Lifetime US2812469A (en) 1952-04-08 1953-11-06 Travelling wave tube arrangement
US423076A Expired - Lifetime US2911599A (en) 1952-04-08 1954-04-14 Attenuation for traveling-wave tubes
US499163A Expired - Lifetime US2857547A (en) 1952-04-08 1955-04-04 Traveling wave tube

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US (4) US2843789A (en)
BE (15) BE523897A (en)
CH (8) CH316934A (en)
DE (2) DE963704C (en)
FR (18) FR65473E (en)
GB (20) GB766790A (en)
NL (3) NL98392C (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2925508A (en) * 1955-07-28 1960-02-16 Sperry Rand Corp Electron beam focusing structure
US2944181A (en) * 1954-08-05 1960-07-05 Int Standard Electric Corp Electron velocity modulation apparatus
US3133227A (en) * 1958-06-25 1964-05-12 Varian Associates Linear particle accelerator apparatus for high energy particle beams provided with pulsing means for the control electrode
US3269611A (en) * 1964-02-04 1966-08-30 Komarek Greaves And Company Feeding mechanism
US3274429A (en) * 1963-03-18 1966-09-20 Varian Associates High frequency electron discharge device with heat dissipation means
US3544832A (en) * 1968-07-18 1970-12-01 Rca Corp Traveling wave tube with evaporated nickel attenuator coating and method of manufacture thereof
DE1541040B1 (en) * 1966-05-16 1971-08-26 Siemens Ag WALKING FIELD TUBE WITH TWO HIGH FREQUENCY INPUT AND OUTSIDE WAVE GUIDES FORMING THE TUBE

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Publication number Priority date Publication date Assignee Title
US3136964A (en) * 1954-05-12 1964-06-09 High Voltage Engineering Corp Radio frequency coupler and attenuator
US2991391A (en) * 1957-07-24 1961-07-04 Varian Associates Electron beam discharge apparatus
US2966609A (en) * 1957-11-22 1960-12-27 Gen Electric Magnetic structures for high frequency energy interchange apparatus
NL105112C (en) * 1958-05-15
DE1136425B (en) * 1959-07-17 1962-09-13 Philips Nv Arrangement for coupling the helical delay line of a field pipe to a waveguide running transversely to the helical axis
US3250946A (en) * 1961-02-07 1966-05-10 Philips Corp Travelling wave tube, in which an electron beam interacts with a helical delay line, having spurious oscillation suppressing means
US3404306A (en) * 1966-04-06 1968-10-01 Alltronics Inc Traveling-wave tube focusing field straightener
US3466493A (en) * 1967-02-21 1969-09-09 Varian Associates Circuit sever for ppm focused traveling wave tubes
FR1522411A (en) * 1967-03-14 1968-04-26 Csf Compensation for the effects of temperature in magnetic focusers
GB1189615A (en) * 1968-03-21 1970-04-29 English Electric Valve Co Ltd Improvements in or relating to Travelling Wave Tubes.
FR2137311B1 (en) * 1971-05-18 1973-05-11 Thomson Csf
JPS5580851U (en) * 1978-11-29 1980-06-04
DE3763981D1 (en) * 1986-02-08 1990-08-30 Teldix Gmbh SEMICONDUCTOR SWITCH.
US4945320A (en) * 1986-02-18 1990-07-31 Teldix Gmbh Microwave switch having at least two switching positions
FR2711277B1 (en) * 1993-10-14 1995-11-10 Alcatel Mobile Comm France Antenna of the type for portable radio device, method of manufacturing such an antenna and portable radio device comprising such an antenna.
GB9418028D0 (en) * 1994-09-07 1994-10-26 Eev Ltd Cavity arrangements
GB2296370B (en) * 1994-12-19 1998-07-29 Eev Ltd Travelling wave tubes
US5596797A (en) * 1995-04-03 1997-01-28 D & M Plastics Corporation Method and apparatus for making a molded cellular antenna coil
KR20190046029A (en) * 2017-10-25 2019-05-07 삼성전기주식회사 Antenna device and portable terminal including the same
CN112692542B (en) * 2020-12-31 2023-03-17 山东微波电真空技术有限公司 Automatic assembly equipment for spiral line, clamping rod and pipe shell

Citations (3)

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Publication number Priority date Publication date Assignee Title
US2259531A (en) * 1938-05-25 1941-10-21 Emi Ltd Magnetic electron lens
US2602148A (en) * 1946-10-22 1952-07-01 Bell Telephone Labor Inc High-frequency amplifier
US2679019A (en) * 1947-12-02 1954-05-18 Rca Corp High-frequency electron discharge device

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US2944181A (en) * 1954-08-05 1960-07-05 Int Standard Electric Corp Electron velocity modulation apparatus
US2925508A (en) * 1955-07-28 1960-02-16 Sperry Rand Corp Electron beam focusing structure
US3133227A (en) * 1958-06-25 1964-05-12 Varian Associates Linear particle accelerator apparatus for high energy particle beams provided with pulsing means for the control electrode
US3274429A (en) * 1963-03-18 1966-09-20 Varian Associates High frequency electron discharge device with heat dissipation means
US3269611A (en) * 1964-02-04 1966-08-30 Komarek Greaves And Company Feeding mechanism
DE1541040B1 (en) * 1966-05-16 1971-08-26 Siemens Ag WALKING FIELD TUBE WITH TWO HIGH FREQUENCY INPUT AND OUTSIDE WAVE GUIDES FORMING THE TUBE
US3544832A (en) * 1968-07-18 1970-12-01 Rca Corp Traveling wave tube with evaporated nickel attenuator coating and method of manufacture thereof

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GB771189A (en) 1957-03-27
GB754563A (en) 1956-08-08
BE521167A (en) 1900-01-01
FR65607E (en) 1956-02-29
FR69068E (en) 1958-09-22
FR68403E (en) 1958-04-30
CH335353A (en) 1958-12-31
FR65606E (en) 1956-02-29
FR65473E (en) 1956-02-21
FR66230E (en) 1956-06-05
FR68404E (en) 1958-04-30
GB754861A (en) 1956-08-15
CH334111A (en) 1958-11-15
FR65616E (en) 1956-02-29
GB810267A (en) 1959-03-11
BE522303A (en) 1900-01-01
GB773393A (en) 1957-04-24
GB777224A (en) 1957-06-19
GB861229A (en) 1961-02-15
BE523117A (en) 1900-01-01
GB766790A (en) 1957-01-23
FR66421E (en) 1957-02-27
CH316934A (en) 1956-10-31
DE1080702B (en) 1960-04-28
CH322499A (en) 1957-06-15
GB886318A (en) 1962-01-03
US2911599A (en) 1959-11-03
BE524397A (en) 1900-01-01
FR65591E (en) 1956-02-28
GB776923A (en) 1957-06-12
BE522186A (en) 1900-01-01
CH329897A (en) 1958-05-15
GB780806A (en) 1957-08-07
FR66233E (en) 1956-06-05
CH333699A (en) 1958-10-31
CH330643A (en) 1958-06-15
BE523425A (en) 1900-01-01
NL95555C (en) 1900-01-01
DE963704C (en) 1957-05-09
US2812469A (en) 1957-11-05
GB778846A (en) 1957-07-10
BE523897A (en) 1900-01-01
GB777225A (en) 1957-06-19
GB773394A (en) 1957-04-24
FR69062E (en) 1958-09-22
FR68804E (en) 1958-06-10
GB767078A (en) 1957-01-30
BE527787A (en) 1900-01-01
FR65608E (en) 1956-02-29
GB734963A (en) 1955-08-10
FR68807E (en) 1958-06-10
GB773783A (en) 1957-05-01
FR65589E (en) 1956-02-28
US2857547A (en) 1958-10-21
CH317676A (en) 1956-11-30
GB756370A (en) 1956-09-05
GB740852A (en) 1955-11-23
GB745099A (en) 1956-02-22
NL196187A (en) 1900-01-01
BE523177A (en) 1900-01-01
BE534531A (en) 1900-01-01
FR68407E (en) 1958-04-30
BE523116A (en) 1900-01-01
BE545710A (en) 1900-01-01
BE524061A (en) 1900-01-01
BE519037A (en) 1900-01-01
BE528213A (en) 1900-01-01
NL98392C (en) 1900-01-01
FR66228E (en) 1956-06-05

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