US3157814A - Delay line for travelling wave tubes - Google Patents

Delay line for travelling wave tubes Download PDF

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Publication number
US3157814A
US3157814A US75198A US7519860A US3157814A US 3157814 A US3157814 A US 3157814A US 75198 A US75198 A US 75198A US 7519860 A US7519860 A US 7519860A US 3157814 A US3157814 A US 3157814A
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US
United States
Prior art keywords
webs
wave
type
transverse webs
delay line
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
US75198A
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English (en)
Inventor
Gross Franz
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.)
Siemens and Halske AG
Siemens Corp
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Siemens Corp
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Filing date
Publication date
Application filed by Siemens Corp filed Critical Siemens Corp
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Publication of US3157814A publication Critical patent/US3157814A/en
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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
    • H01J23/16—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
    • H01J23/28—Interdigital slow-wave structures; Adjustment therefor

Definitions

  • This invention is concerned with a delay line for travelling wave tubes, employed for amplifying millimeter waves, consisting of a wave guide made in the form of a hollow conductor and comprising strip-shaped transverse webs which are alternately arranged at oppositely positioned wall portions and electrically connected therewith, such transverse webs extending into the space of reciprocal action between a wave propagated along the line and an electron beam extending through openings in the transverse Webs.
  • the object of the invention is to provide a delay line for the amplification of millimeter waves, which assures a wide band and stable amplifying operation with the forwardly propagated first partial wave.
  • delay lines known for the production of electrical oscillations with a wave length in the order of magnitude from 1 centimeter to 1 meter, consisting of a hollow wave guide, strip-shaped webs disposed therein and extending transverse to the longitudinal direction thereof. These strip-shaped webs are spaced apart approximately uniformly and are arranged at oppositely positioned wall portions in electrical contact therewith.
  • the invention proposes the solution of the problem, to provide, in connection with the previously explained delay line, symmetrical to the transverse webs two longitudinal webs which extend from the inner wall of the Wave guide into direct proximity of the transverse webs.
  • FIGS. 1 to 3 show thin metal sheet members which may be in simple manner stacked or assembled in proper sequence and interconnected, for example, by means of gold solder, to form a delay line of desired length;
  • FIGS. 4 to 6 show differently shaped thin metal sheet members for the same purpose
  • FIGS. 7 to 9 represent further differently shaped metal sheet members forconstructing a delay line in the same manner
  • FIG. 10 is a dispersion diagram, for the fundamental wave and the fowardly propagated first partial wave, of two delay lines constructed of metal sheet members respectively according to FIGS. 1-3, 4-6 and 7-9, and
  • FIG. 11 is a sectional elevation depicting a delay line conforming to the present invention.
  • the thin metal sheet members may be produced by stamping or by etching.
  • FIGS. 1, 2 and 3 show types of metal sheet members 1 and 2 which are to be stacked to form a delay line, the sheet member 1 being represented in FIG. 3 dis-. placed by 180 from the position in which it is shown in FIG. 1.
  • the expression type of metal shee or similar language is intended to mean sheet members of identical form and size which are produced, for example, by means of identical stamping or punching tools.
  • the sheet member 2 illustrates the cross sectional extent 3 of the wave 3,157,814 Patented Nov. 17, 1964 ice guide and defines the cross sectional extent of the longitudinal webs 4.
  • the sheet member 1 represents the cross sectional extent 3 of the wave guide as well as the cross sectional extent of the longitudinal webs and of the transverse web 5.
  • the transverse web 5 is provided with a hole 6 formed therein for the passage of the electron beam.
  • longitudinally extending Webs are soldered thereinto, the cross sectional extent of these webs being indicated in FIGS. 4-6 by dotted lines marked by reference numeral 10.
  • a particularly good coupling impedance may be obtained with a delay line constructed of metal sheet members 11 and 12 as shown in FIGS. 7-9.
  • the longitudinal webs 4- are in the range of the transverse webs 5 provided with arcuate extensions 13, such extensions partially embracing the part of the respective transverse webs which have the holes 6 formed therein.
  • the curve 14 in FIG. 10 shows the dispersion curve of a delay line constructed respectively of metal sheets formed according to FIGS 1-3 and 4-6.
  • the curve 15 shows the dispersion curve of a delay line constructed of metal sheets formed according to FIGS. 7-9.
  • the ordinate indicates the amount of delay 0/ v.
  • Upon the abscissa is plotted the wave length A in free space.
  • a delay line with a dispersion according to curve 14 is adapted for very broad band amplification in the operating range of the forwardly propagated first partial wave.
  • a delay line with a dispersion according to curve 15 is advantageous where band width requirements are less demanding, since it has a higher coupling impedance owing to lower group velocity.
  • a delay line for amplifying millimeter waves in connection with travelling wave tubes comprising a plurality of sheet metal members of at least two different types defining a hollow wave guide comprising stripshaped transverse webs extending alternately from and electrically interconnected with oppositely positioned wall portions thereof, said transverse webs extending into the space of reciprocal action between a wave propagated along the line and an electron beam propagated through openings formed in the transverse webs, and means forming two longitudinally directed, substantially continuously extending webs arranged symmetrically with respect to the transverse Webs, said longitudinally directed webs extending from the inner wall of the wave guide into relatively close proximity with said transverse webs, wherein said sheet metal members include a first type which represents the cross sectional extent of the wave guide and the cross sectional extent of the transverse web, a second type which represents the cross sectional extent of the wave guide, and another of the first type adjacent 3 the second type and displaced by 180 relative tothe first said first type, said sheet metal members being stacked and mutually interconnected, assuring
  • both metal sheet types represent respectively the cross sectional extents of thefwave guide and that of the longitudinally re te w '3.

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  • Microwave Tubes (AREA)
US75198A 1960-04-11 1960-12-12 Delay line for travelling wave tubes Expired - Lifetime US3157814A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES68000A DE1243786B (de) 1960-04-11 1960-04-11 Lauffeldroehre zur Verstaerkung von Millimeterwellen mit einer Verzoegerungsleitung mit periodischer Struktur

Publications (1)

Publication Number Publication Date
US3157814A true US3157814A (en) 1964-11-17

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US75198A Expired - Lifetime US3157814A (en) 1960-04-11 1960-12-12 Delay line for travelling wave tubes

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Country Link
US (1) US3157814A (enrdf_load_stackoverflow)
DE (1) DE1243786B (enrdf_load_stackoverflow)
NL (1) NL260900A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3366897A (en) * 1961-11-10 1968-01-30 Siemens Ag Delay line for travelling wave tubes
US3443146A (en) * 1966-02-16 1969-05-06 Westinghouse Electric Corp Conductive elements interconnecting adjacent members of the delay structure in a traveling wave tube
US4004180A (en) * 1975-06-09 1977-01-18 Siemens Aktiengesellschaft Traveling wave tube with rectangular coupling waveguides

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0347624B1 (de) * 1988-06-21 1995-02-15 Thomson Tubes Electroniques Herstellungsverfahren für eine Verzögerungsleitung für eine Wanderfeldröhre

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2806973A (en) * 1955-12-30 1957-09-17 Itt Traveling wave electron discharge device
US2827589A (en) * 1952-05-17 1958-03-18 Bell Telephone Labor Inc Electron discharge device
US2858472A (en) * 1953-10-16 1958-10-28 Bell Telephone Labor Inc Slow-wave circuit for a traveling wave tube
US2926280A (en) * 1956-04-23 1960-02-23 Raytheon Co Traveling wave structures
US2966610A (en) * 1957-12-06 1960-12-27 Sperry Rand Corp Electron beam tube
US3011085A (en) * 1955-09-30 1961-11-28 Hughes Aircraft Co Traveling wave tube

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2827589A (en) * 1952-05-17 1958-03-18 Bell Telephone Labor Inc Electron discharge device
US2858472A (en) * 1953-10-16 1958-10-28 Bell Telephone Labor Inc Slow-wave circuit for a traveling wave tube
US3011085A (en) * 1955-09-30 1961-11-28 Hughes Aircraft Co Traveling wave tube
US2806973A (en) * 1955-12-30 1957-09-17 Itt Traveling wave electron discharge device
US2926280A (en) * 1956-04-23 1960-02-23 Raytheon Co Traveling wave structures
US2966610A (en) * 1957-12-06 1960-12-27 Sperry Rand Corp Electron beam tube

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3366897A (en) * 1961-11-10 1968-01-30 Siemens Ag Delay line for travelling wave tubes
US3443146A (en) * 1966-02-16 1969-05-06 Westinghouse Electric Corp Conductive elements interconnecting adjacent members of the delay structure in a traveling wave tube
US4004180A (en) * 1975-06-09 1977-01-18 Siemens Aktiengesellschaft Traveling wave tube with rectangular coupling waveguides

Also Published As

Publication number Publication date
DE1243786B (de) 1967-07-06
NL260900A (enrdf_load_stackoverflow)

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