GB767506A - Improvements in or relating to travelling wave tubes - Google Patents
Improvements in or relating to travelling wave tubesInfo
- Publication number
- GB767506A GB767506A GB2265153A GB2265153A GB767506A GB 767506 A GB767506 A GB 767506A GB 2265153 A GB2265153 A GB 2265153A GB 2265153 A GB2265153 A GB 2265153A GB 767506 A GB767506 A GB 767506A
- Authority
- GB
- United Kingdom
- Prior art keywords
- helix
- tube
- coating
- turns
- wire
- 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
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
- H01J23/16—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
- H01J23/36—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
Abstract
767,506. Travelling wave tubes. STANDARD TELEPHONES & CABLES, Ltd. Aug. 17, 1953, No. 22651/53. Class 39(1). The helix of a travelling wave tube is formed as a conductive coating 10, Fig. 1, on an insulating tube 8, and a resistive (lorry) coating covers the helix turns and bridges the spaces between the helix turns. The width and pitch of the turns increase at each end for impedance matching to external waveguides or coaxial lines with " built-out " cavities. The uncoated portion of tube 8 may be shaped as a ribbon of uniform width, as shown, which may or may not terminate in a longitudinal portion 12. Tube 8 may be of low loss glass, and is coated by inserting therein a wire or ribbon helix with end turns of varying pitch as a mash and evaporating metal from a wire suspended along the axis. The wire may be of tungsten or molybdenum plated with gold, nickel or copper, the plating metal being evaporated. The metal coating on tube 8 may be used as a base for a further coating. After the mash and axial wire have been removed, a coating of resistance material to provide loss is then deposited over the whole inner surface. The tube 8 is carried by metal sleeves 13 having spring fingers 14 engaging the envelope and serving as D.C. connections to the helix. One finger 14 is connected to the gun anode 4. Tube 8 may be used as the tube envelope but this is not preferred. The helix may be provided with an outer conductor, to serve as an electrostatic screen. Flanges 2, 22, 23, 24, 25 form chokes with sleeves 13, 14 and portions of the helix, and the end portions of the helix act as <#>/4 antenna probes. Specification 668,725 is referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2265153A GB767506A (en) | 1953-08-17 | 1953-08-17 | Improvements in or relating to travelling wave tubes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2265153A GB767506A (en) | 1953-08-17 | 1953-08-17 | Improvements in or relating to travelling wave tubes |
Publications (1)
Publication Number | Publication Date |
---|---|
GB767506A true GB767506A (en) | 1957-02-06 |
Family
ID=10182895
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2265153A Expired GB767506A (en) | 1953-08-17 | 1953-08-17 | Improvements in or relating to travelling wave tubes |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB767506A (en) |
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