GB744018A - Improvements in or relating to travelling wave tubes - Google Patents

Improvements in or relating to travelling wave tubes

Info

Publication number
GB744018A
GB744018A GB22492/53A GB2249253A GB744018A GB 744018 A GB744018 A GB 744018A GB 22492/53 A GB22492/53 A GB 22492/53A GB 2249253 A GB2249253 A GB 2249253A GB 744018 A GB744018 A GB 744018A
Authority
GB
United Kingdom
Prior art keywords
line
helix
tube
input
metal
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
GB22492/53A
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
Priority claimed from US305153A external-priority patent/US2798981A/en
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB744018A publication Critical patent/GB744018A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H01J23/02—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
    • H01J23/02—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
    • 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
    • H01J23/48—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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Microwave Tubes (AREA)

Abstract

744,018. Travelling wave tubes. STANDARD TELEPHONES & CABLES, Ltd. Aug. 14, 1953 [Aug. 19, 1952], No. 22492/53. Addition to 706,958. Class 39 (1). In a travelling wave tube as claimed in the parent Specification and having a metal envelope and in which energy is reflected by the delay line due to mismatching, and in which the input line 5, Fig. 1, and metal envelope 1 together form (undesirably) a feedback line liable to be excited by the reflected energy so as to cause self-oscillations one or more metal members within the envelope surrounding the delay line and/or the input coaxial line are provided for preventing the " feedback line " from functioning in this manner by shielding or short-circuiting action. The metal members may comprise conductive baffles 12, 13, 14, as shown, contacting line 5 directly and metal envelope 1 via fingers 15. The structure short-circuits the " feedback line ". There may be any number of baffles. In a modification the line 5 may carry bands provided with spring contacts which engage the metal envelope, Fig. 3 (not shown). The spring contacts and bands may be separate members or formed integrally and the shorting members so formed are spaced apart by less than a quarter wavelength. In a further modification, Fig. 2 (not shown), the input and output matching sections 9, 10 are joined by a conductive cylinder surrounding and shielding the helix. In the tube of Fig. 1, 5 and 6 are input and output coaxial lines, and the wave propagating structure is a helix carried by a quartz tube 8 or by ceramic rods bonded thereto. The helix supporting tube may have on its inner or outer surface or in the material of the tube itself lossy material 11, such as colloidal or moulded graphite. The helix may be replaced by a disc loaded guide. Cooling fins 4 are provided. The mismatching producing the feedback energy may be due to imperfections in the delay line, imperfectly matched lossy material applied to a specific region of the line, or mismatching at the output end of the line. Specification 740,852 is referred to.
GB22492/53A 1952-04-08 1953-08-14 Improvements in or relating to travelling wave tubes Expired GB744018A (en)

Applications Claiming Priority (20)

Application Number Priority Date Filing Date Title
US776923XA 1952-04-08 1952-04-08
DE316934X 1952-04-08
DE734963X 1952-07-05
US744018XA 1952-08-19 1952-08-19
US778846XA 1952-08-19 1952-08-19
US740852XA 1952-08-19 1952-08-19
US305153A US2798981A (en) 1952-08-19 1952-08-19 Traveling wave electron discharge devices
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
GB744018A true GB744018A (en) 1956-01-25

Family

ID=31982890

Family Applications (1)

Application Number Title Priority Date Filing Date
GB22492/53A Expired GB744018A (en) 1952-04-08 1953-08-14 Improvements in or relating to travelling wave tubes

Country Status (2)

Country Link
FR (1) FR65590E (en)
GB (1) GB744018A (en)

Also Published As

Publication number Publication date
FR65590E (en) 1956-02-28

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