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GB773394A - Magnet arrangements for travelling wave tubes - Google Patents

Magnet arrangements for travelling wave tubes

Info

Publication number
GB773394A
GB773394A GB29510/53A GB2951053A GB773394A GB 773394 A GB773394 A GB 773394A GB 29510/53 A GB29510/53 A GB 29510/53A GB 2951053 A GB2951053 A GB 2951053A GB 773394 A GB773394 A GB 773394A
Authority
GB
United Kingdom
Prior art keywords
magnetic
field
helix
centre
magnet
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
Application number
GB29510/53A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB773394A publication Critical patent/GB773394A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/02Electrodes; Magnetic control means; Screens
    • H01J23/08Focusing arrangements, e.g. for concentrating stream of electrons, for preventing spreading of stream
    • H01J23/087Magnetic focusing arrangements
    • H01J23/0876Magnetic focusing arrangements with arrangements improving the linearity and homogeniety of the axial field, e.g. field straightener
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05DPROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00Pretreatment 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
    • B05D3/14Pretreatment 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
    • B05D3/141Plasma treatment
    • B05D3/142Pretreatment
    • B05D3/144Pretreatment of polymeric substrates
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G81/00Macromolecular compounds obtained by interreacting polymers in the absence of monomers, e.g. block polymers
    • C08G81/02Macromolecular 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
    • C08G81/021Block or graft polymers containing only sequences of polymers of C08C or C08F
    • C08G81/022Block 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
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04Coating
    • C08J7/0427Coating with only one layer of a composition containing a polymer binder
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/02Electrodes; Magnetic control means; Screens
    • H01J23/06Electron or ion guns
    • H01J23/065Electron or ion guns producing a solid cylindrical beam
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/02Electrodes; Magnetic control means; Screens
    • H01J23/08Focusing arrangements, e.g. for concentrating stream of electrons, for preventing spreading of stream
    • H01J23/083Electrostatic focusing arrangements
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/02Electrodes; Magnetic control means; Screens
    • H01J23/08Focusing arrangements, e.g. for concentrating stream of electrons, for preventing spreading of stream
    • H01J23/087Magnetic focusing arrangements
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/16Circuit elements, having distributed capacitance and inductance, structurally associated with the tube and interacting with the discharge
    • H01J23/24Slow-wave structures, e.g. delay systems
    • H01J23/26Helical slow-wave structures; Adjustment therefor
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/16Circuit elements, having distributed capacitance and inductance, structurally associated with the tube and interacting with the discharge
    • H01J23/24Slow-wave structures, e.g. delay systems
    • H01J23/30Damping arrangements associated with slow-wave structures, e.g. for suppression of unwanted oscillations
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/36Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy
    • H01J23/40Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy to or from the interaction circuit
    • H01J23/42Coupling 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
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/36Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy
    • H01J23/40Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy to or from the interaction circuit
    • H01J23/48Coupling 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
    • H01J23/50Coupling 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
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J25/00Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
    • H01J25/34Travelling-wave tubes; Tubes in which a travelling wave is simulated at spaced gaps
    • H01J25/36Tubes 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
    • H01J25/38Tubes 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
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J25/00Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
    • H01J25/50Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01PWAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P5/00Coupling devices of the waveguide type
    • H01P5/08Coupling devices of the waveguide type for linking dissimilar lines or devices
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q11/00Electrically-long antennas having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements
    • H01Q11/02Non-resonant antennas, e.g. travelling-wave antenna
    • H01Q11/08Helical antennas
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03CMODULATION
    • H03C3/00Angle modulation
    • H03C3/30Angle modulation by means of transit-time tube
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03HIMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H2/00Networks using elements or techniques not provided for in groups H03H3/00 - H03H21/00
    • H03H2/005Coupling circuits between transmission lines or antennas and transmitters, receivers or amplifiers
    • H03H2/006Transmitter or amplifier output circuits
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M19/00Current supply arrangements for telephone systems
    • H04M19/02Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M5/00Manual exchanges
    • H04M5/04Arrangements for indicating calls or supervising connections for calling or clearing
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q3/00Selecting arrangements
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2327/00Characterised 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
    • C08J2327/02Characterised 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
    • C08J2327/04Characterised 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
    • C08J2327/06Homopolymers or copolymers of vinyl chloride
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2429/00Characterised 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

Landscapes

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

Abstract

773,394. Magnets. STANDARD TELEPHONES & CABLES, Ltd. Oct. 26, 1953 [Oct. 31, 1952], No. 29510/53. Class 35. [Also in Group XL (a)] A magnetic focusing device for a travelling wave tube comprises a cylindrical permanent magnet 6, Fig. 1, of which the wall tapers in thickness from a maximum at the centre to minima at its ends, surrounding a magnetic sleeve 7 which is saturated by the field of magnet 6, so that the magnetic field is uniform along the beam path and falls abruptly at each end. Cylinder 7 is saturated at or below the minimum field strength used. The focusing device may be designed for rectilinear electron flow or for arrangements in which the gun converges the beam down to a small diameter before the magnetic field is applied, such as in Brillouin type flow. The slight increase of magnetic field at the centre is eliminated by grinding away a small portion of the inner wall of the magnet at the centre thereof. Cylindrical shell 7 of saturable magnetic material makes the field still more uniform along the length of the delay line and also makes the field accurately axial. In a modification, the permanent magnet may be of tapered outer diameter, Fig. 4 (not shown). Tube envelope 2 is of ceramic material or of non-magnetic metal, and the gun electrode terminals are at the left-hand end while the input and output coupling devices, which may be coaxial lines as shown, or waveguides, are taken to terminals at the right-hand end. The helix 9 may be supported by a ceramic tube, or preferably by insulating rods 14, carried by magnetic shields 10, 11 and matching transformers 12, 13. The helix may be bonded to its support rods, and the helix assembly may be coated over the half nearer the input, or any other desired portion, with lossy material such as colloidal graphite. The helix may be replaced by a disc-loaded waveguide. Specifications 706,958, 740,852, [both in Group XL (a)], and 773,393, [Group XL (b)], are referred to.
GB29510/53A 1952-04-08 1953-10-26 Magnet arrangements for travelling wave tubes Expired GB773394A (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
US778846XA 1952-08-19 1952-08-19
US740852XA 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

Publications (1)

Publication Number Publication Date
GB773394A true GB773394A (en) 1957-04-24

Family

ID=31982865

Family Applications (20)

Application Number Title Priority Date Filing Date
GB8525/53A Expired GB766790A (en) 1952-04-08 1953-03-27 Improvements in or relating to travelling wave apparatus
GB8526/53A Expired GB734963A (en) 1952-04-08 1953-03-27 Arrangement for magnetic concentration of an electron beam in a travelling wave tube
GB21854/53A Expired GB740852A (en) 1952-04-08 1953-08-07 Means and method of supporting helical conductors
GB22494/53A Expired GB773783A (en) 1952-04-08 1953-08-14 Travelling wave electron discharge devices
GB22491/53A Expired GB773393A (en) 1952-04-08 1953-08-14 R-f coupling arrangements for travelling wave tubes
GB22493/53A Expired GB778846A (en) 1952-04-08 1953-08-14 Travelling wave tubes
GB24540/53A Expired GB776923A (en) 1952-04-08 1953-09-04 Travelling wave electron discharge devices
GB25817/53A Expired GB777224A (en) 1952-04-08 1953-09-18 Travelling wave electron discharge devices
GB26447/53A Expired GB777225A (en) 1952-04-08 1953-09-25 Travelling wave electron discharge devices
GB26450/53A Expired GB745099A (en) 1952-04-08 1953-09-25 Arrangement for magnetic concentration of an electron beam in a travelling wave tube
GB27869/53A Expired GB756370A (en) 1952-04-08 1953-10-09 Travelling wave electron discharge devices
GB29510/53A Expired GB773394A (en) 1952-04-08 1953-10-26 Magnet arrangements for travelling wave tubes
GB8924/54A Expired GB754861A (en) 1952-04-08 1954-03-26 Arrangements for coupling a coaxial transmission line to a helix slow wave structure
GB10495/54A Expired GB780806A (en) 1952-04-08 1954-04-09 Improvements in or relating to the provision of localised attenuation in travelling wave tubes
GB10496/54A Expired GB754563A (en) 1952-04-08 1954-04-09 Arrangement for magnetic concentration of an electron beam in a travelling wave tube
GB33565/54A Expired GB771189A (en) 1952-04-08 1954-11-19 Travelling wave tube
GB8858/55A Expired GB767078A (en) 1952-04-08 1955-03-25 Travelling wave tube
GB5891/56A Expired GB810267A (en) 1952-04-08 1956-02-24 Focusing magnet for long electron beams
GB33384/57A Expired GB861229A (en) 1952-04-08 1957-10-25 Radio frequency impedance matching section
GB14052/58A Expired GB886318A (en) 1952-04-08 1958-05-02 Travelling wave electron discharge device

Family Applications Before (11)

Application Number Title Priority Date Filing Date
GB8525/53A Expired GB766790A (en) 1952-04-08 1953-03-27 Improvements in or relating to travelling wave apparatus
GB8526/53A Expired GB734963A (en) 1952-04-08 1953-03-27 Arrangement for magnetic concentration of an electron beam in a travelling wave tube
GB21854/53A Expired GB740852A (en) 1952-04-08 1953-08-07 Means and method of supporting helical conductors
GB22494/53A Expired GB773783A (en) 1952-04-08 1953-08-14 Travelling wave electron discharge devices
GB22491/53A Expired GB773393A (en) 1952-04-08 1953-08-14 R-f coupling arrangements for travelling wave tubes
GB22493/53A Expired GB778846A (en) 1952-04-08 1953-08-14 Travelling wave tubes
GB24540/53A Expired GB776923A (en) 1952-04-08 1953-09-04 Travelling wave electron discharge devices
GB25817/53A Expired GB777224A (en) 1952-04-08 1953-09-18 Travelling wave electron discharge devices
GB26447/53A Expired GB777225A (en) 1952-04-08 1953-09-25 Travelling wave electron discharge devices
GB26450/53A Expired GB745099A (en) 1952-04-08 1953-09-25 Arrangement for magnetic concentration of an electron beam in a travelling wave tube
GB27869/53A Expired GB756370A (en) 1952-04-08 1953-10-09 Travelling wave electron discharge devices

Family Applications After (8)

Application Number Title Priority Date Filing Date
GB8924/54A Expired GB754861A (en) 1952-04-08 1954-03-26 Arrangements for coupling a coaxial transmission line to a helix slow wave structure
GB10495/54A Expired GB780806A (en) 1952-04-08 1954-04-09 Improvements in or relating to the provision of localised attenuation in travelling wave tubes
GB10496/54A Expired GB754563A (en) 1952-04-08 1954-04-09 Arrangement for magnetic concentration of an electron beam in a travelling wave tube
GB33565/54A Expired GB771189A (en) 1952-04-08 1954-11-19 Travelling wave tube
GB8858/55A Expired GB767078A (en) 1952-04-08 1955-03-25 Travelling wave tube
GB5891/56A Expired GB810267A (en) 1952-04-08 1956-02-24 Focusing magnet for long electron beams
GB33384/57A Expired GB861229A (en) 1952-04-08 1957-10-25 Radio frequency impedance matching section
GB14052/58A Expired GB886318A (en) 1952-04-08 1958-05-02 Travelling wave electron discharge device

Country Status (7)

Country Link
US (4) US2843789A (en)
BE (15) BE524397A (en)
CH (8) CH316934A (en)
DE (2) DE963704C (en)
FR (18) FR65473E (en)
GB (20) GB766790A (en)
NL (3) NL196187A (en)

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US2966609A (en) * 1957-11-22 1960-12-27 Gen Electric Magnetic structures for high frequency energy interchange apparatus
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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
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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
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
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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.
US3544832A (en) * 1968-07-18 1970-12-01 Rca Corp Traveling wave tube with evaporated nickel attenuator coating and method of manufacture thereof
FR2137311B1 (en) * 1971-05-18 1973-05-11 Thomson Csf
JPS5580851U (en) * 1978-11-29 1980-06-04
US4967170A (en) * 1986-02-08 1990-10-30 Teldix Gmbh Rotary waveguide switch having arcuate waveguides realized by planar faces
EP0293386B1 (en) * 1986-02-18 1992-05-13 TELDIX GmbH Microwave switch with 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

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Also Published As

Publication number Publication date
FR68404E (en) 1958-04-30
FR68807E (en) 1958-06-10
GB756370A (en) 1956-09-05
CH317676A (en) 1956-11-30
GB810267A (en) 1959-03-11
FR68407E (en) 1958-04-30
GB773783A (en) 1957-05-01
FR65608E (en) 1956-02-29
GB734963A (en) 1955-08-10
NL98392C (en) 1900-01-01
GB754861A (en) 1956-08-15
BE519037A (en) 1900-01-01
GB773393A (en) 1957-04-24
FR66421E (en) 1957-02-27
GB886318A (en) 1962-01-03
FR65616E (en) 1956-02-29
CH334111A (en) 1958-11-15
GB745099A (en) 1956-02-22
BE545710A (en) 1900-01-01
GB777225A (en) 1957-06-19
BE523117A (en) 1900-01-01
GB771189A (en) 1957-03-27
BE521167A (en) 1900-01-01
BE522186A (en) 1900-01-01
CH330643A (en) 1958-06-15
FR65591E (en) 1956-02-28
NL95555C (en) 1900-01-01
FR65473E (en) 1956-02-21
FR66228E (en) 1956-06-05
DE963704C (en) 1957-05-09
GB780806A (en) 1957-08-07
US2843789A (en) 1958-07-15
FR69062E (en) 1958-09-22
BE523177A (en) 1900-01-01
GB776923A (en) 1957-06-12
CH329897A (en) 1958-05-15
DE1080702B (en) 1960-04-28
NL196187A (en) 1900-01-01
FR65589E (en) 1956-02-28
GB766790A (en) 1957-01-23
FR65607E (en) 1956-02-29
BE522303A (en) 1900-01-01
BE524397A (en) 1900-01-01
US2857547A (en) 1958-10-21
GB754563A (en) 1956-08-08
CH316934A (en) 1956-10-31
US2911599A (en) 1959-11-03
BE523116A (en) 1900-01-01
BE523897A (en) 1900-01-01
FR68403E (en) 1958-04-30
CH335353A (en) 1958-12-31
BE524061A (en) 1900-01-01
GB740852A (en) 1955-11-23
FR68804E (en) 1958-06-10
GB767078A (en) 1957-01-30
GB777224A (en) 1957-06-19
BE528213A (en) 1900-01-01
GB861229A (en) 1961-02-15
FR66230E (en) 1956-06-05
FR66233E (en) 1956-06-05
BE534531A (en) 1900-01-01
BE527787A (en) 1900-01-01
FR69068E (en) 1958-09-22
GB778846A (en) 1957-07-10
FR65606E (en) 1956-02-29
BE523425A (en) 1900-01-01
CH333699A (en) 1958-10-31
US2812469A (en) 1957-11-05
CH322499A (en) 1957-06-15

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