EP0274950A1 - Breitbandige Kopplungsvorrichtung zwischen der Verzögerungsleitung einer Wanderfeldröhre und der energieübertragenden Aussenschaltung und Wanderfeldröhre mit einer solchen Vorrichtung - Google Patents

Breitbandige Kopplungsvorrichtung zwischen der Verzögerungsleitung einer Wanderfeldröhre und der energieübertragenden Aussenschaltung und Wanderfeldröhre mit einer solchen Vorrichtung Download PDF

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Publication number
EP0274950A1
EP0274950A1 EP87402855A EP87402855A EP0274950A1 EP 0274950 A1 EP0274950 A1 EP 0274950A1 EP 87402855 A EP87402855 A EP 87402855A EP 87402855 A EP87402855 A EP 87402855A EP 0274950 A1 EP0274950 A1 EP 0274950A1
Authority
EP
European Patent Office
Prior art keywords
guide
molding
delay 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.)
Granted
Application number
EP87402855A
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English (en)
French (fr)
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EP0274950B1 (de
Inventor
Jean-Claude Kuntzmann
Noel Santonja
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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Filing date
Publication date
Application filed by Thomson CSF SA filed Critical Thomson CSF SA
Publication of EP0274950A1 publication Critical patent/EP0274950A1/de
Application granted granted Critical
Publication of EP0274950B1 publication Critical patent/EP0274950B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01J23/36—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
    • 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

Definitions

  • the present invention relates to a device for coupling between on one side the delay line of a power traveling wave tube, in which the focusing of the electron beam is carried out using annular, permanent, alternating magnets and on the other side an external circuit for transmitting the energy of the tube, constituted by a waveguide with double molding; the invention relates more specifically to a device comprising a small waveguide, generally with simple molding, of reduced dimensions so as not to exceed the thickness, measured parallel to the axis of the tube, of that of the permanent magnets that it crosses to ensure the coupling between the delay line located inside the focuser and the waveguide with double molding located outside the focuser.
  • Such coupling devices are known from French patent 2,485,801 filed on June 27, 1980, where the small waveguide is a straight guide which opens into the output waveguide, with one of the two moldings of the output guide which constitutes an extension of the molding of the small guide and the other of the two moldings which is reduced, until it disappears, before having reached the end of the guide with double molding coupled to the small guide.
  • Such a coupling device an exemplary embodiment of which will be described with the aid of FIG. 1 of this text, has an insufficient bandwidth for certain applications; moreover, by its construction, it is quite bulky.
  • the object of the present invention is to reduce the above-mentioned drawbacks.
  • the small guide is bent so as to be able to arrange, for example, the output guide with double molding parallel to the traveling wave tube.
  • a device for coupling between the delay line of a traveling wave tube and the external circuit for transmitting the energy of the tube consisting of a first waveguide having first and second molding this device comprising a second waveguide coupled in a junction plane to the first guide and having a single molding connected, at one of its ends, to the delay line and, at the other of its ends, to the first molding, is characterized in that the second molding is short-circuited in the junction plane, in that the first guide comprises an impedance transformer, in that the second guide is at substantially constant impedance, and in that the width of the second guide is, at least substantially, equal to that of the first guide in the junction plane and is reduced in the direction of the delay line.
  • Figures la to 1c are sectional views of a coupling device according to French patent 2,485,801.
  • Figure 1a shows a delay line, 1, of a traveling wave tube; it is a helical line, of axis XX ⁇ , with its propeller 10 and its centering rods such as 11.
  • the delay line 1 is arranged at the interior of a focal point 2 with annular permanent magnets, alternating such as 20, 22 separated by annular polar masses such as 21, 23.
  • An external circuit for transmitting the energy of the tube constituted by a rectangular guide 4 to two moldings 40 ⁇ , 41 ⁇ , is coupled to delay line 1.
  • the coupling device between line 1 and guide 4 comprises a small guide 3 which passes through the magnet 20 without exceeding the width, measured parallel to the axis XX ⁇ , of this magnet; the guide 3 comprises a molding 30 ⁇ which, on one side, is welded to the end of the propeller 10 and, on the other side, extends into the molding 40 ⁇ of the guide 4.
  • the guides 3 and 4 are straight guides arranged perpendicular to the XX ⁇ axis; their transverse dimensions are constant so that the junction between these two guides takes place by an abrupt transition in the two transverse dimensions of the guides; the molding 41 ⁇ of the guide 4 is reduced until it disappears completely before reaching the end of the guide 4 coupled to the small guide 3.
  • Figures 1b and 1c are sectional views of the guide 4 and the small guide 3 according to sectional planes, the respective traces AA and BB are indicated in Figure 1a.
  • Figures 2a and 2b show a coupling device according to the invention.
  • Figure 2a is a longitudinal sectional view which, like Figure 1a, shows a delay line, 1, of a traveling wave tube; the line is a propeller line arranged inside a focusing 2, with alternating annular magnets, equipped with cooling fins such as 25.
  • a small waveguide 3 provided with a single molding 30 has a single molding 30 through which the end of the propeller 10 of line 1 is welded; on the other side, the molding extends into the molding 40 by a rectangular guide with two moldings 40, 41, which constitutes the external circuit for transmitting the energy of the tube.
  • Figure 2b is a sectional view along the section plane, the trace CC of which is shown in Figure 2a. This view shows the connection of the molding 30 to the propeller 10 and its extension in the molding 40.
  • the assembly coupling device according to FIGS. 2a, 2b differs mainly from that according to FIGS. 1a, 1b by: - a bend in the plane E of the guides 3 and 4, that is to say in a plane parallel to their short sides - a different structure from guides 3 and 4 and their moldings.
  • the elbow is a right angle elbow located at the junction of guides 3 and 4; its main role is to allow the guide 4 to be arranged parallel to the tube 1 in order to reduce the size of the assembly; incidentally it allows better cooling of the tube 1, some of its cooling fins being brazed on the guide 4 and therefore benefiting from its mass to ensure the flow of calories from the tube 1.
  • zone D1 the guide 3 passes through the magnet 20 of the focusing device 2; its dimensions and those of its molding are constant and are chosen so that its characteristic impedance Z1 is close enough to that of the propeller (Ze ⁇ 60 ohms) in order to obtain a very wide band adaptation: more than an octave .
  • zone D2 before arriving at the bend, the dimensions of the guide 3 and its molding 30 are gradually increased by arranging so that the increase in the dimensions of the guide are compensated by those of the molding for the effects on the characteristic impedance of the guide; thus in zone D2 the small guide 3 has a constant characteristic impedance equal to Z1.
  • the length of the zone D2 is a function of the standing wave ratio (ROS) admissible in the working frequency band. With a length corresponding to a quarter of the average wavelength in the band 4.75 - 11 GHz, a ROS was measured less than or equal to 1.92 in this band and, with a length equal to three quarters of this medium wavelength, a ROS has been measured less than or equal to 1.29.
  • ROS standing wave ratio
  • zone D3 where the bend is located, the dimensions continue to increase while maintaining the same characteristic impedance; for the molding 30 the increase is made until reaching the dimensions of the molding 40, for the long side of the small guide 3 until reaching the size of the long side of the guide 4 and for the short side of the guide 3 until to a dimension which turns out to be less than that of the guide 4 at the junction point; there is therefore a gradual transition for the moldings 30, 40 and the short sides and abrupt transition for the long sides; the molding 41 ends in short circuit, Y, in the plane of the junction of the guides 3 and 4. From this junction plane the two moldings 40, 41 of the guide 4 are present and the guide 4 has small and large sides whose dimensions will not vary.
  • the guide 4 is a guide with double molding of standard dimensions, marketed under the reference WRD 475 D 24 and having a characteristic impedance equal to Z3 and a cross section of 27.68 mm X 12.85 mm.
  • the guide 4 is provided, in its part not shown in FIG. 2a, with a sealed window with a wide strip.
  • zone D4 which makes it possible to lower the characteristic impedance of the guide with double molding 4, before reaching the junction plane with the small guide with single molding 3, is necessary for the conservation of the bandwidth of the standard guide with double molding; this change can not only be made as indicated in FIG. 3a thanks to a transformer with successive stages of the Tchebycheff type but also by an impedance transformer of linear, exponential, cosinosoidal, parabolic type.
  • FIGS. 3a to 3d are sectional views of the guides 3 and 4 of another coupling device according to the invention which is distinguished from that according to Figures 2a, 2b only by the fact that the guides 3 and 4 are in the extension of each other, that is to say do not form an elbow.
  • FIG. 3a is a longitudinal section while the sections 3b, 3c, 3d are transverse sections, the traces of the respective sectional planes of which have been indicated in FIG. 3a. Everything that has been said about the guides 3 and 4 of FIGS. 2a, 2b applies to the guides 3 and 4 of FIGS. 3a to 3d, with the exception of the elbow, as can be seen from the figures.
  • FIG. 3a is particularly interesting because it clearly shows the short-circuiting, Y, of the molding 41 of the guide 4 in the junction plane with the small guide 3.
  • FIGS 4, 5 and 6 are partial perspective views showing different variants of coupling devices according to the invention; in these figures where the focalizers are not represented, tear-offs make it possible to see how the moldings of the guides are produced.
  • FIG. 4 is a view which corresponds to the embodiment according to FIGS. 2a, 2b, that is to say to an embodiment with curvature in the plane E and with the molding 30 of the small guide 3 which is connected to that, 40 , of the two moldings of the guide 4 which is the closest to the delay line 1; the short-circuited end, Y, of the other molding, 41, of the guide 4 appears clearly in FIG. 4.
  • FIG. 5 corresponds to FIG. 4 with the difference that the molding 40, which is connected to the molding 30 of the small guide 3, is that of the two moldings of the guide 4 which is the farthest from the delay line 1.
  • FIG. 6 is an embodiment with curvature in the plane H, that is to say an embodiment where the guide 4 is found to be arranged orthogonally with respect to the delay line 1.
  • the present invention is not limited to the examples described, thus in particular that the guide 3 could include a second molding. Similarly, when it is necessary to make an elbow with the guides 3 and 4, this elbow may not be at the junction plane of these guides but somewhere in the guide 3 or in the guide 4.

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  • Control Of Motors That Do Not Use Commutators (AREA)
  • Microwave Tubes (AREA)
EP87402855A 1986-12-19 1987-12-15 Breitbandige Kopplungsvorrichtung zwischen der Verzögerungsleitung einer Wanderfeldröhre und der energieübertragenden Aussenschaltung und Wanderfeldröhre mit einer solchen Vorrichtung Expired - Lifetime EP0274950B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8617879 1986-12-19
FR8617879A FR2608835B1 (fr) 1986-12-19 1986-12-19 Dispositif de couplage a large bande entre la ligne a retard d'un tube a onde progressive et le circuit externe de transmission de l'energie du tube, et tube a onde progressive comportant un tel dispositif

Publications (2)

Publication Number Publication Date
EP0274950A1 true EP0274950A1 (de) 1988-07-20
EP0274950B1 EP0274950B1 (de) 1990-08-08

Family

ID=9342114

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87402855A Expired - Lifetime EP0274950B1 (de) 1986-12-19 1987-12-15 Breitbandige Kopplungsvorrichtung zwischen der Verzögerungsleitung einer Wanderfeldröhre und der energieübertragenden Aussenschaltung und Wanderfeldröhre mit einer solchen Vorrichtung

Country Status (5)

Country Link
US (1) US4871950A (de)
EP (1) EP0274950B1 (de)
JP (1) JPS63166123A (de)
DE (1) DE3764262D1 (de)
FR (1) FR2608835B1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0341107A1 (de) * 1988-04-19 1989-11-08 Thomson-Csf Wanderfeldröhre mit einer Kupplungsvorrichtung zwischen ihrer Verzögerungsleitung und den äusseren Mikrowellenschaltungen
FR2637731A1 (fr) * 1988-10-11 1990-04-13 Thomson Csf Tube a onde progressive muni d'un dispositif de couplage etanche entre sa ligne a retard et un circuit hyperfrequence externe
EP0432047A1 (de) * 1989-12-08 1991-06-12 Thomson Tubes Electroniques Breitbandiges Mikrowellenfenster mit miniaturisierten Abmessungen für Entladungsröhren
FR2677170A1 (fr) * 1991-05-28 1992-12-04 Thomson Tubes Electroniques Dispositif de couplage entre la ligne a retard d'un tube a ondes progressives et un guide d'ondes, et tube a ondes progressives comportant ce dispositif.

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0799670B2 (ja) * 1993-03-30 1995-10-25 日本電気株式会社 真空素子
FR2787918B1 (fr) 1998-12-23 2001-03-16 Thomson Tubes Electroniques Tube a ondes progressives multibande de longueur reduite capable de fonctionner a puissance elevee

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2922961A (en) * 1941-07-25 1960-01-26 Bell Telephone Labor Inc Finline coupler
US3188583A (en) * 1961-10-12 1965-06-08 Raytheon Co Parallel plate line transition section between a coaxial line and a ridged waveguide
FR2485801A1 (fr) * 1980-06-27 1981-12-31 Thomson Csf Dispositif de couplage entre la ligne a retard d'un tube a onde progressive et le circuit externe de transmission de l'energie du tube, et tube a onde progressive comportant un tel dispositif
FR2531575A1 (fr) * 1981-01-09 1984-02-10 Thomson Csf Dispositif de transition guide d'ondes a double redan-ligne coaxiale en bout et circuit hyperfrequence comportant un tel dispositif

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2761915A (en) * 1952-02-08 1956-09-04 Bell Telephone Labor Inc Helix couplers
US3602766A (en) * 1969-02-12 1971-08-31 Hughes Aircraft Co Traveling-wave tube having auxiliary resonant cavities containing lossy bodies which protrude into the slow-wave structure interaction cells to provide combined frequency sensitive and directionally sensitive attenuation
US4004180A (en) * 1975-06-09 1977-01-18 Siemens Aktiengesellschaft Traveling wave tube with rectangular coupling waveguides
US4147956A (en) * 1976-03-16 1979-04-03 Nippon Electric Co., Ltd. Wide-band coupled-cavity type traveling-wave tube

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2922961A (en) * 1941-07-25 1960-01-26 Bell Telephone Labor Inc Finline coupler
US3188583A (en) * 1961-10-12 1965-06-08 Raytheon Co Parallel plate line transition section between a coaxial line and a ridged waveguide
FR2485801A1 (fr) * 1980-06-27 1981-12-31 Thomson Csf Dispositif de couplage entre la ligne a retard d'un tube a onde progressive et le circuit externe de transmission de l'energie du tube, et tube a onde progressive comportant un tel dispositif
FR2531575A1 (fr) * 1981-01-09 1984-02-10 Thomson Csf Dispositif de transition guide d'ondes a double redan-ligne coaxiale en bout et circuit hyperfrequence comportant un tel dispositif

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0341107A1 (de) * 1988-04-19 1989-11-08 Thomson-Csf Wanderfeldröhre mit einer Kupplungsvorrichtung zwischen ihrer Verzögerungsleitung und den äusseren Mikrowellenschaltungen
US4970432A (en) * 1988-04-19 1990-11-13 Thomson-Csf Travelling wave tube with coupling device between its delay line and external microwave circuits
FR2637731A1 (fr) * 1988-10-11 1990-04-13 Thomson Csf Tube a onde progressive muni d'un dispositif de couplage etanche entre sa ligne a retard et un circuit hyperfrequence externe
EP0364335A1 (de) * 1988-10-11 1990-04-18 Thomson-Csf Wanderfeld-Röhre mit einer gasdichten Kopplungsvorrichtung zwischen ihrer Verzögerungsleitung und einer aussen gelegenen Mikrowellenschaltung
US4985659A (en) * 1988-10-11 1991-01-15 Thomson-Csf Travelling wave tube provided with an impervious coupling device between its delay line and an external microwave circuit
EP0432047A1 (de) * 1989-12-08 1991-06-12 Thomson Tubes Electroniques Breitbandiges Mikrowellenfenster mit miniaturisierten Abmessungen für Entladungsröhren
FR2655771A1 (fr) * 1989-12-08 1991-06-14 Thomson Tubes Electroniques Fenetre hyperfrequence large bande de dimensions miniaturisees pour tubes electroniques.
FR2677170A1 (fr) * 1991-05-28 1992-12-04 Thomson Tubes Electroniques Dispositif de couplage entre la ligne a retard d'un tube a ondes progressives et un guide d'ondes, et tube a ondes progressives comportant ce dispositif.

Also Published As

Publication number Publication date
FR2608835A1 (fr) 1988-06-24
FR2608835B1 (fr) 1994-05-13
US4871950A (en) 1989-10-03
DE3764262D1 (de) 1990-09-13
JPS63166123A (ja) 1988-07-09
EP0274950B1 (de) 1990-08-08

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