EP0048648B1 - Wanderfeldröhrenverzögerungsleitung mit gekoppelten Hohlraumresonatoren und Wanderfeldröhre mit einer solchen Leitung - Google Patents

Wanderfeldröhrenverzögerungsleitung mit gekoppelten Hohlraumresonatoren und Wanderfeldröhre mit einer solchen Leitung Download PDF

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Publication number
EP0048648B1
EP0048648B1 EP81401351A EP81401351A EP0048648B1 EP 0048648 B1 EP0048648 B1 EP 0048648B1 EP 81401351 A EP81401351 A EP 81401351A EP 81401351 A EP81401351 A EP 81401351A EP 0048648 B1 EP0048648 B1 EP 0048648B1
Authority
EP
European Patent Office
Prior art keywords
cavities
delay line
line
wave tube
travelling
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
EP81401351A
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English (en)
French (fr)
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EP0048648A1 (de
Inventor
Christian Deville
Francis Payen
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.)
Thales SA
Original Assignee
Thomson CSF SA
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Publication date
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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

Definitions

  • the present invention relates to delay lines with coupled cavities for traveling wave tubes as well as microwave tubes comprising such a line.
  • Delayed lines with coupled cavities are more particularly used in traveling wave tubes where they provide the interaction between an electron beam moving along the line axis and an electromagnetic wave traversing the line. When conditions of synchronism of the wave and the beam are fulfilled, the electrons yield energy to the electromagnetic wave.
  • the delay lines with coupled cavities consist of a series of resonant cavities, separated from each other by pierced walls, by at least one coupling opening between cavities and by an opening for the passage of the electron beam, focused according to the axis of the line.
  • a high coupling impedance leads to a high value of the quotient which results in a dispersive line and low bandwidth, and / or a high value of the R / Q quotient, which results in poor thermal robustness.
  • the electron beam is highly disturbed, particularly in the final part of the delay line where the amplitude of the microwave voltage between the mouthpieces of cavities becomes a high fraction of the acceleration voltage of the electrons which gave them their initial speed.
  • a traveling wave tube provided with a delay line with coupled cavities designed according to the prior art will only have a strong interaction efficiency at the expense of either the amplification band which will be weak vis-à-vis -vis what is possible to achieve with this type of line, that is to say the average power that can provide the traveling wave tube.
  • the present invention relates to a delay line with coupled cavities of increased thermal robustness and having as good a conversion efficiency as the lines with coupled cavities of the prior art, without reduction of the amplification band.
  • This reduction in the coupling impedance is mainly obtained by gradually decreasing the R / Q ratio of the cavities.
  • a computer-calculated variation of the delay rate C / Vr p of the line as a function of the abscissa z of the line is necessary to use, in conjunction with the progressive decrease in the coupling impedance, a computer-calculated variation of the delay rate C / Vr p of the line as a function of the abscissa z of the line.
  • the present invention relates to a delay line, for traveling wave tube, with cavities re-entrant complexes, externally limited by a cylindrical wall whose axis coincides with that along which the electron beam of the tube propagates, and laterally limited by walls perpendicular to this axis, each wall being common to two cavities , said walls being pierced by at least one coupling opening between cavities and, in their center, by an opening bordered by a flange of the same axis forming the re-entrant part of the cavity, the internal diameter of the flanges increasing in the direction of propagation of the electron beam, characterized in that this delay line has in its final part a progressive reduction in its coupling impedance as well as a variation in its delay rate, this progressive reduction in the coupling impedance being obtained in particular by a progressive increase in the direction of propagation of the electron beam of the width (D 2 -D,) / 2 of the mouthpieces of cavities, where D i is the diameter be inside the flanges and
  • Figure la represents a perspective view of a delay line with coupled cavities, according to the prior art.
  • the delay line shown in FIG. 1 a, comprises disks 1, aligned parallel to each other along the same axis 00 'coinciding with the axis of propagation of the electron beam, disks forming the wall common to two neighboring cavities 10.
  • Each disc is pierced on the one hand by two coupling openings between cavities 2, symmetrical with respect to the axis of the line 00 ′, on the other hand by the opening 3 for the passage of the electron beam 6, generally circular, located in the center of the disc.
  • This opening is bordered by a flange 4 of the same axis called the cavity spout.
  • the cavities 10, three in number in the figure, are limited by a cylindrical wall 5.
  • FIG. 2 represents a cross section of a delay line with coupled cavities, according to the invention.
  • An additional contribution of the present invention resides in the fact that the extraction of microwave energy from the beam towards the payload being carried out with an output section whose coupling impedance decreases, the availability of electronic speeds is less important and focusing the beam is made easier. This adds an additional factor to the average power capacity that the traveling wave tube can provide.
  • the structure less dispersive, not only does it weaken the coupling impedance, but it also increases the bandwidth; the arrangements provided by the present invention therefore go in the direction of an increase in the width of the amplification band, which constitutes one of the most advantageous characteristics of traveling wave tubes.
  • the invention is generally applicable to the production of high power levels with a large bandwidth and with a high efficiency in the microwave field, particularly in the centimeter range.

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  • Microwave Tubes (AREA)

Claims (2)

1. Verzögerungsleitung für Lauffeldröhre mit gekoppelten hineinragenden Hohlräumen, welche außen durch eine zylinderförmige Wand begrenzt ist, deren Achse mit derjenigen vermengt ist, entlängs der sich das Elektronenbündel fortpflanzt, und seitlich durch zu dieser Achse senkrechte Seiten begrenzt ist, wobei jede Wand zwei Hohlräumen gemeinsam ist, und die Wände zwischen Hohlräumen von wenigstens einer Öffnung zur Koppelung und in ihrem Mittelpunkt von einer Öffnung durchquert sind, welche mit einem den in den Hohlraum hineinragenden Teil bildenden Rand mit der gleichen Achse umrandet ist, wobei der innere Durchmesser (D1) der Ränder in die in die Fortpflanzungsrichtung des Elektronenbündels zunimmt, dadurch gekennzeichnet, daß diese Verzögerungsleitung an ihrem Endteil eine fortschreitende Verringerung ihrer Koppelungsimpedanz, ebenso wie eine Veränderung ihres Verzögerungsgrads aufweist, wobei die fortschreitende Verringerung der Koppelungsimpedanz insbesondere durch eine fortschreitende Erhöhung der Breite (D2-Di)/2 der Hohlraummundstücke in der Fortpflanzungsrichtung des Elektronenbündels erhalten wird, worin Di der innere Durchmesser der Bänder und D2 ihr äußerer Durchmesser ist.
2. Verzögerungsleitung nach Anspruch 1, dadurch gekennzeichnet, daß die progressive Verminderung der Kopplungsimpedanz auch durch eine in die Richtung der Fortpflanzung des Elektronenbündels gehende progressive Erhöhung der Dicke (E) der gemeinsamen Wände mit zwei Hohlräumen erhalten wird.
EP81401351A 1980-09-19 1981-08-27 Wanderfeldröhrenverzögerungsleitung mit gekoppelten Hohlraumresonatoren und Wanderfeldröhre mit einer solchen Leitung Expired EP0048648B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8020216 1980-09-19
FR8020216A FR2490872A1 (fr) 1980-09-19 1980-09-19 Ligne a retard a cavites couplees pour tube a ondes progressives et tube a ondes progressives comportant une telle ligne

Publications (2)

Publication Number Publication Date
EP0048648A1 EP0048648A1 (de) 1982-03-31
EP0048648B1 true EP0048648B1 (de) 1984-10-10

Family

ID=9246107

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81401351A Expired EP0048648B1 (de) 1980-09-19 1981-08-27 Wanderfeldröhrenverzögerungsleitung mit gekoppelten Hohlraumresonatoren und Wanderfeldröhre mit einer solchen Leitung

Country Status (5)

Country Link
US (1) US4431944A (de)
EP (1) EP0048648B1 (de)
JP (1) JPS5790848A (de)
DE (1) DE3166622D1 (de)
FR (1) FR2490872A1 (de)

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FR2528626A2 (fr) * 1978-12-29 1983-12-16 Thomson Csf Generateur d'ondes radioelectriques pour hyperfrequence
CA1219672A (en) * 1983-05-09 1987-03-24 National Aeronautics And Space Administration Linearized traveling wave amplifier with hard limiter characteristics
US4558256A (en) * 1983-06-09 1985-12-10 Varian Associates, Inc. Velocity tapering of comb-quad traveling-wave tubes
USH1649H (en) 1987-07-31 1997-05-06 Barrish; Joel C. HIV protease inhibitor combinations
KR0121696Y1 (ko) * 1993-04-30 1998-08-01 김광호 영상반주장치
GB9724960D0 (en) * 1997-11-27 1998-01-28 Eev Ltd Electron beam tubes
JP5377234B2 (ja) * 2009-11-05 2013-12-25 株式会社東芝 クライストロン装置
DE102010023755B4 (de) 2010-06-15 2018-04-05 Deutsches Zentrum für Luft- und Raumfahrt e.V. Flughöhenermittlungseinrichtung
KR101919417B1 (ko) * 2012-02-07 2018-11-19 삼성전자주식회사 다중 터널을 갖는 전자기파 발진기 및 상기 전자기파 발진기를 포함하는 전자기파 발생 장치
CN104064422B (zh) * 2014-06-21 2016-08-17 电子科技大学 一种小型全金属慢波器件
CN115083867B (zh) * 2022-08-11 2024-09-17 电子科技大学 一种适用于行波放大器的慢波结构及行波管

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Publication number Priority date Publication date Assignee Title
FR944500A (fr) * 1947-03-15 1949-04-06 Materiel Telephonique Tubes électroniques amplificateurs ou oscillateurs à modulation de vitesse et à ondes progressives
FR946141A (fr) * 1947-04-21 1949-05-24 Csf Lampe amplificatrice et oscillatrice avec commande par une onde progressive
NL155856B (nl) * 1949-09-05 Celanese Corp Werkwijze voor het bereiden van een ionogeen oxymethyleencopolymeer.
FR1177533A (fr) * 1957-06-25 1959-04-27 Csf Accélérateur d'électrons linéaire à onde progressive, excité par un oscillateur à onde progressive
US3274428A (en) * 1962-06-29 1966-09-20 English Electric Valve Co Ltd Travelling wave tube with band pass slow wave structure whose frequency characteristic changes along its length
FR1358984A (fr) * 1962-06-29 1964-04-17 English Electric Valve Co Ltd Perfectionnements aux tubes à ondes progressives
US3571651A (en) * 1966-09-29 1971-03-23 Gen Electric Log periodic electron discharge device
FR2213579B1 (de) * 1973-01-04 1978-06-16 Siemens Ag
US3846664A (en) * 1973-02-22 1974-11-05 English Electric Valve Co Ltd Coupled cavity travelling wave tubes
US4147956A (en) * 1976-03-16 1979-04-03 Nippon Electric Co., Ltd. Wide-band coupled-cavity type traveling-wave tube
US4053810A (en) * 1976-06-25 1977-10-11 Varian Associates, Inc. Lossless traveling wave booster tube
DE7638147U1 (de) * 1976-12-06 1977-06-16 Siemens Ag, 1000 Berlin Und 8000 Muenchen Verzoegerungsleitung fuer lauffeldverstaerkerroehren
FR2460539A1 (fr) * 1979-07-03 1981-01-23 Thomson Csf Ligne a retard a pas variable pour tube a onde progressive, et tube a onde progressive muni d'une telle ligne
FR2468992A1 (fr) * 1979-10-30 1981-05-08 Thomson Csf Ligne a retard a resistance de couplage variable, pour tube a champs croises et tube a champs croises comportant une telle ligne.
US4315194A (en) * 1980-02-20 1982-02-09 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Coupled cavity traveling wave tube with velocity tapering
FR2479558A1 (fr) * 1980-04-01 1981-10-02 Thomson Csf Tube a ondes progressives a cavites couplees et focalisation par aimants permanents alternes, et ensemble amplificateur comprenant un tel tube
JP2506791B2 (ja) * 1987-07-13 1996-06-12 松下電器産業株式会社 ガス調理器

Also Published As

Publication number Publication date
JPH0378736B2 (de) 1991-12-16
JPS5790848A (en) 1982-06-05
DE3166622D1 (en) 1984-11-15
EP0048648A1 (de) 1982-03-31
US4431944A (en) 1984-02-14
FR2490872B1 (de) 1983-07-22
FR2490872A1 (fr) 1982-03-26

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