EP1579469B1 - Mikrowellenröhre mit mechanischer frequenzabstimmung - Google Patents

Mikrowellenröhre mit mechanischer frequenzabstimmung Download PDF

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Publication number
EP1579469B1
EP1579469B1 EP03760787A EP03760787A EP1579469B1 EP 1579469 B1 EP1579469 B1 EP 1579469B1 EP 03760787 A EP03760787 A EP 03760787A EP 03760787 A EP03760787 A EP 03760787A EP 1579469 B1 EP1579469 B1 EP 1579469B1
Authority
EP
European Patent Office
Prior art keywords
tube
rings
microwave
ring
frequency
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
EP03760787A
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English (en)
French (fr)
Other versions
EP1579469A2 (de
Inventor
Jehan Vanpoperynghe
Jean-Paul Prulhiere
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.)
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
Original Assignee
Commissariat a lEnergie Atomique CEA
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
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Publication date
Application filed by Commissariat a lEnergie Atomique CEA, Commissariat a lEnergie Atomique et aux Energies Alternatives CEA filed Critical Commissariat a lEnergie Atomique CEA
Publication of EP1579469A2 publication Critical patent/EP1579469A2/de
Application granted granted Critical
Publication of EP1579469B1 publication Critical patent/EP1579469B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01J23/18—Resonators
    • H01J23/20—Cavity resonators; Adjustment or tuning thereof
    • H01J23/207—Tuning of single resonator

Definitions

  • the invention relates to a microwave tube with mechanical frequency tuning.
  • the invention finds a particularly advantageous application in the field of electronic tubes for generating and / or amplifying radio signals.
  • TOP traveling wave tubes
  • BWO Back Ward Oscillator
  • klystrons magnetrons
  • carcinotrons masers etc.
  • These tubes can operate in single-shot mode (single pulse) or recurrent mode (train pulses).
  • a type BWO tube comprises an insert I and a periodic structure P.
  • a distance d defines the period of the periodic structure.
  • a microwave type BWO tube is optimized for a single frequency F. It is therefore effective only in a very narrow frequency band ⁇ F, and even narrower than the output power is important (typically ⁇ F / F ⁇ 5%).
  • the microwave tubes mentioned above are optimized for working at a fixed frequency and the known means for varying the frequency of the tube always lead to a significant degradation of the performance of the tube.
  • the invention does not have this disadvantage.
  • the invention relates to a microwave tube according to claim 1.
  • the mechanical means for moving the rings comprise a set of electrical contacts between the rings, at least one lead screw, a set of nuts mounted on the lead screw, a set of rods, each rod securely connecting a nut to a ring, the tube being provided with at least one slot allowing the passage of rods in the wall of the tube, the mother screw having several different pitch sectors able to maintain a periodicity between the rings during a rotation of the lead screw .
  • the mechanical means for moving the rings comprise a set of electrical contacts between the rings, at least one set of pins, each pin being firmly connected to a ring, the tube being provided with at least one longitudinal slot. allowing the passage of the lugs in the wall of the tube, a ring external to the tube comprising at least one set of slots, each slot of the outer ring allowing the passage of at least one lug, the slots of a set of slots having a different inclination for each ring to maintain a periodicity to the different rings when moving the rings.
  • the mechanical means for varying the frequency F therefore comprise at least one longitudinal slot made in the tube and allowing the passage of drive means of all the rings.
  • the microwave tube according to the invention is a TOP, a BWO type tube, a magnetron, a carcinatron or a maser.
  • the periodic structure of the microwave tube is corrugated sheet.
  • the invention has the advantage of being able to vary the frequency F of the electromagnetic wave emitted in a large range of variation, namely several tens of percent, while maintaining the amplification performance of the electromagnetic wave existing in power sources working at a fixed frequency.
  • the invention is advantageously applied to any source of radioelectric power consisting of an electron beam circulating through a structure comprising periodic or non-periodic shape variations.
  • the integrated source according to the invention comprises a periodic corrugated geometric structure which makes it possible to obtain a frequency variation by a mechanical method allowing either a modification of the pitch of the periodic structure constituted, for example, by corrugated sheet, or a variation of the length of an insert, or a combination of both structures.
  • This integrated system advantageously allows a rapid modulation of the parameters that are the frequency and the power of the radiofrequency signal.
  • the system is easily automatable and able to be controlled quickly from the outside, without having to modify the operation of the electron beam.
  • This integrated system is particularly well suited to BWO type microwave tubes. It then replaces the periodic structures in place and / or the inserts. It is also easily adaptable to other types of tubes. It can also be associated with other systems provided to allow a variation of the output frequency of a signal. It then advantageously makes it possible to increase the efficiency and the field of operation of the system.
  • the frequency radiated by a tube according to the invention may advantageously be chosen in a significant range, for example several tens of%, without collapse of the output power, the other parameters of the tube (such as, for example, voltage and current). current of the electron beam) not being modified.
  • FIG. 3A and 3B An example of a microwave tube is shown in Figures 3A and 3B .
  • the electromechanical structure for adjusting the frequency of the microwave tube comprises a fixed part and a movable part.
  • the fixed part consists of the longitudinal wall 3 of the tube in which is formed at least one guide slot G.
  • the guide slot or slots G allow the passage of the rods 6 in the longitudinal wall 3 of the tube to connect the nuts 5 to the rings.
  • a ring seen in section is, for example, shaped like a rim.
  • the lead screw When adjusting the frequency, the lead screw is rotated, which drives the nuts 5, the rods 6, the rings A, B, C, D and the electrical contacts 2 in a translation movement.
  • the ring A can be connected to a mechanical part p which can then slide in the tube 3.
  • the mother screw 4 is monobloc. It consists of several different threading areas adapted to each of the nuts 5. A single mother screw is theoretically sufficient for the implementation of the invention.
  • the figure 3A illustrates the case where the device comprises two mother screws. The second screw, when used, must then rotate in perfect synchronism with the first lead screw. The quality of the translation of the rings is improved because of the symmetrization of the application points of the movement.
  • a lead screw has several sectors of different pitch to keep the system, during the rotation of the lead screw, the same distance between the vertices of the periodic corrugated structure that constitute the rings.
  • L (AB) be the distance between the rings A and B
  • L (BC) the distance between the rings B and C
  • L (CD) the distance between the rings C and D.
  • the variation of the periodicity of the rings is based on the rotation of a ring equipped with slots inside which lugs connected to the periodic corrugated structures can move.
  • the inclination of these slots is such that it allows to maintain a periodicity.
  • the tube 3 is the same as that of the previous assembly.
  • Each ring placed inside the tube 3 is integral with a lug 7.
  • a lug 7 moves inside two slots located on two independent parts, namely the fixed tube 3 and an outer ring 8.
  • a first slot 9 placed on the fixed tube 3 allows only translational movements of the rings in the longitudinal direction of the tube.
  • a set of slots 10, placed on the outer ring 8 make it possible to set the extent of the variations of the period of the periodic structure. They correspond to the different steps of the mother screw 4 of the assembly previous and ensures the same function.
  • the slots 10 have a different inclination for each ring in order to maintain, during the movement of the rings, a periodicity to the different rings.
  • the outer ring 8 can therefore be assimilated here to a set of screw-and-nut pairs of the device according to the example of the microwave tube.
  • the tube 3 comprises only one longitudinal slot 9 and the outer ring 8 comprises only one set of slots 10.
  • the invention also relates to the case where the tube 3 comprises, for example, two longitudinal slots 9, the two longitudinal slots being then arranged symmetrically on the tube 3, and where the outer ring then comprises two sets of slots 10, the second set of slots 10 being associated with the second longitudinal slot to ensure the displacement of the rings according to the principle of the invention.
  • the mechanism according to the invention is automatable, controllable quickly from the outside and at will without modifying the operation of the electron beam.
  • Any mechanical system for rapidly varying the position of the rings inside the tube while maintaining a periodicity of the rings can also suit.
  • the embodiment of the invention described above can easily be coupled to stepping motors, to jacks placed either inside the tube or outside the tube (the movements being then carried out by the intermediate of watertight passages).
  • the system according to the invention can be adapted to several categories of sources, without calling into question the basic principle.
  • the microwave tube may also include an insert whose length can be adjusted. Such an adjustment is implemented by the displacement of a second tube in the tube 3, with preservation of electrical continuity.
  • This improvement is not used in itself to make, vary the frequency of the tube. It may allow, for example, to adapt the total length of the tube (insert + periodic structure) to the length variations of the periodic structure.

Landscapes

  • Microwave Tubes (AREA)
  • Constitution Of High-Frequency Heating (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Surgical Instruments (AREA)
  • Making Paper Articles (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Length-Measuring Devices Using Wave Or Particle Radiation (AREA)

Claims (4)

  1. Mikrowellenröhre (3) zum Erzeugen einer elektromagnetischen Welle der Frequenz F, wobei die Mikrowellenröhre eine im Innern der Röhre angeordnete periodische Struktur aufweist, die die Frequenz bestimmt, dadurch gekennzeichnet,
    dass die periodische Struktur aus einer Anordnung von Ringen (A,B,C,D) besteht,
    dass die Röhre mechanische Mittel (4,5,2,G;7,8,9,10) aufweist, um die Ringe zueinander zu verschieben und beim Verschieben der Ringe eine Periodizität der periodischen Struktur aufrechtzuerhalten, und
    dass die mechanischen Mittel zum Verschieben der Ringe eine Anordnung von elektrischen Kontakten (2) zwischen den Ringen und eine Anordnung von Stiften (7) aufweisen, jeder Stift fest mit einem Ring verbunden ist, die Röhre (3) mit mindestens einem Längsschlitz (9) versehen ist, der den Durchgang der Stifte (7) in die Wand der Röhre erlaubt, ein Außenring (8) außerhalb der Röhre eine Anordnung von Schlitzen (10) aufweist, jeder Schlitz (10) des Außenrings (8) den Durchgang eines Stifts (7) erlaubt und wobei die Schlitze der Schlitzanordnung eine unterschiedliche Neigung für jeden Ring haben, um bei der Verschiebung der Ringe eine Periodizität der verschiedenen Ringe aufrechtzuerhalten.
  2. Mikrowellenröhre nach Anspruch 1, dadurch gekennzeichnet, dass die Röhre eine TOP-Röhre oder eine Röhre des Typs BWO oder ein Magnetron oder ein Carcinotron oder ein Maser ist.
  3. Mikrowellenröhre nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die periodische Struktur aus Wellblech ist.
  4. Mikrowellenröhre nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass sie ein Einsatzteil aufweist, dessen Länge anpassbar ist.
EP03760787A 2002-06-25 2003-06-25 Mikrowellenröhre mit mechanischer frequenzabstimmung Expired - Lifetime EP1579469B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0207849 2002-06-25
FR0207849A FR2841379B1 (fr) 2002-06-25 2002-06-25 Tube micro-onde a accord mecanique de frequence
PCT/FR2003/001960 WO2004001787A2 (fr) 2002-06-25 2003-06-25 Tube a micro-onde a accord mecanique de frequence

Publications (2)

Publication Number Publication Date
EP1579469A2 EP1579469A2 (de) 2005-09-28
EP1579469B1 true EP1579469B1 (de) 2011-08-03

Family

ID=29720020

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03760787A Expired - Lifetime EP1579469B1 (de) 2002-06-25 2003-06-25 Mikrowellenröhre mit mechanischer frequenzabstimmung

Country Status (5)

Country Link
US (1) US7456577B2 (de)
EP (1) EP1579469B1 (de)
AT (1) ATE519217T1 (de)
FR (1) FR2841379B1 (de)
WO (1) WO2004001787A2 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080221650A1 (en) * 2006-08-04 2008-09-11 Turner Paul F Microwave applicator with adjustable heating length
US8621435B2 (en) * 2009-12-23 2013-12-31 Microsoft Corporation Time debugging
GB201000156D0 (en) 2010-01-07 2010-02-24 Gas2 Ltd Isothermal reactor for partial oxidisation of methane
GB201112024D0 (en) 2011-07-13 2011-08-31 Gas2 Ltd Isothermal reactor for partial oxidation of methane
CN110686574B (zh) * 2019-09-09 2021-06-01 电子科技大学 微波点火试验装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01204502A (ja) * 1988-02-10 1989-08-17 Fujitsu Ltd マイクロ波増幅器
EP0401725A2 (de) * 1989-06-09 1990-12-12 SELENIA INDUSTRIE ELETTRONICHE ASSOCIATE S.p.A. Element mit periodischer Struktur zur Anwendung auf dem Mikrowellengebiet

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2658393A (en) * 1945-12-10 1953-11-10 John P Woods Mechanical tuning device
US2853647A (en) * 1954-03-24 1958-09-23 Litton Industries Inc Tunable cavity resonator electron discharge device
US2945156A (en) * 1956-06-07 1960-07-12 Gen Electric Tunable high-frequency apparatus
DE2154745A1 (de) * 1971-11-04 1973-05-10 Philips Patentverwaltung Frequenz-abstimmvorrichtung eines resonators fuer ein klystron
US4737738A (en) * 1987-05-11 1988-04-12 Agence Spatiale Europeenne Extended interaction device tuned by movable delay line structure

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01204502A (ja) * 1988-02-10 1989-08-17 Fujitsu Ltd マイクロ波増幅器
EP0401725A2 (de) * 1989-06-09 1990-12-12 SELENIA INDUSTRIE ELETTRONICHE ASSOCIATE S.p.A. Element mit periodischer Struktur zur Anwendung auf dem Mikrowellengebiet

Also Published As

Publication number Publication date
ATE519217T1 (de) 2011-08-15
WO2004001787A2 (fr) 2003-12-31
WO2004001787A3 (fr) 2006-03-02
FR2841379B1 (fr) 2005-07-15
EP1579469A2 (de) 2005-09-28
US7456577B2 (en) 2008-11-25
FR2841379A1 (fr) 2003-12-26
US20060032446A1 (en) 2006-02-16

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