US3060342A - Reflex klystron having a cavity resonator with a movable wall - Google Patents

Reflex klystron having a cavity resonator with a movable wall Download PDF

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US3060342A
US3060342A US845194A US84519459A US3060342A US 3060342 A US3060342 A US 3060342A US 845194 A US845194 A US 845194A US 84519459 A US84519459 A US 84519459A US 3060342 A US3060342 A US 3060342A
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wall
movable wall
cavity resonator
reflex klystron
klystron
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US845194A
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Voorn Hendrikus Wilhelmus Der
Bernardus Bastiaan Van Iperen
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US Philips Corp
North American Philips Co Inc
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US Philips Corp
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
    • H01J25/02—Tubes with electron stream modulated in velocity or density in a modulator zone and thereafter giving up energy in an inducing zone, the zones being associated with one or more resonators
    • H01J25/22—Reflex klystrons, i.e. tubes having one or more resonators, with a single reflection of the electron stream, and in which the stream is modulated mainly by velocity in the modulator zone
    • H01J25/24—Reflex klystrons, i.e. tubes having one or more resonators, with a single reflection of the electron stream, and in which the stream is modulated mainly by velocity in the modulator zone in which the electron stream is in the axis of the resonator or resonators and is pencil-like before reflection

Definitions

  • This invention relates to reflex klystrons, the reflector portion of which is secured to a movable wall of the cavity resonator which can be adjusted for controlling the natural frequency of the klystron.
  • the movable wall prefferably be constituted by a diaphragm which is obtained by drawing and cold deforming sheet metal in templates.
  • the diaphragm is soldered in position in the rigid portion of the wall of the cavity resonator, the reflector portion likewise being soldered to the diaphragm.
  • the known structure has the disadvantage that cracks are liable to occur in the being diaphragm drawn, whilst the diaphragm readily becomes brittle due to the solder flowing on too far and breaks off as a result of the rather considerable deformation which occurs in changing the frequency of a klystron.
  • the length of life expressed in the number of possible changes of firequency is thus small.
  • An object of the invention is to provide a structure which afiords advantages with respect to the known type.
  • the movable wall comprises a thin annular portion not obtained by drawing, having a solid edge which is secured by soldering to a portion of the cavity resonator which is not movable, whilst at the centre of the annular portion around the aperture to allow the passage of the electron beam there is provided a rigid cylindrical portion to which the reflector portion is soldered, the two solid portions and the sheet metal portion being manufactured from one piece of material.
  • soldered edges may readily be shaped so that solder does not flow on to the thin portion, nor to the aperture for the passage of the electron beam.
  • the diaphragm with its two solid portions is preferably manufactured by turning from one piece of material. Manufacture by moulding is also possible.
  • FIG. 1 shows a reflex klystron having a cavity resonator with a movable wall according to the invention
  • FIG. 2 shows, on an enlarged scale, the separate wall portion before being soldered in position.
  • reference numeral 1 indicates the base of a bulb in which an electron gun 2 is arranged.
  • a resonant cavity 3 is provided between a solid wall 4, a thin Wall 5 matched to the electron gun, and a movable Wall portion 6.
  • the movable wall portion 6 is soldered by means of a thick edge 7 to the solid wall 4.
  • the fernico-cylinder 11 supports a glass cylinder 12 and a fernic-o-sleeve 13, to which the reflector ⁇ 10 is secured.
  • the soldering groove in 8 and the solid edge 7 are bevelled to accommodate a ring of solder.
  • the dimensions of the diaphragm follow from the graduation in millimetres shown in FIG. 2. In this connection, it may be mentioned that the portion 6 is 0.20 mm. thick and the opening 9 has a diameter of 0.25 mm.
  • a reflex klystron comprising an envelope, an electron gun within a first portion said envelope, a first wall closing one end of said first envelope portion and having an aperture therein for the passage of an electron beam, a moveable wall spaced from and secured to said first wall, said moveable wall having an aperture therein aligned with the aperture in the first-mentioned wall for the passage of the electron beam, said walls together defining a resonant cavity, a second envelope portion secured to said moveable wall, and a reflector within said second envelope portion positioned to intercept and refleet the electron beam, said moveable wall comprising a thin annular portion of mechanically undeformed material having a rigid edge secured to said first wall portion and a rigid cylindrical portion surrounding said aperture to which the reflector is secured.
  • a reflex klystron as claimed in claim 1 in which the rigid edge is secured to the first wall portion by solder and the reflector is secured to the rigid cylindrical portion by solder, the edges of moveable wall portion which secure the same to the first wall portion and the collector being provided with grooves to prevent the flow of solder over the moveable wall.

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Description

Oct. 23, 1962 H. w. VAN DER VOORN ETA]. 3,060,342
REFLEX KLYSTRON HAVING A CAVITY RESONATOR WITH A MOVABLE WALL Filed Oct. 8, 1959 |NVENTOR5 HEHDRIK I. VAN DER VOORII BERNARDUS a. VAN IPEREN United States Patent 3,060,342 REFLEX KLYSTRON HAVING A CAVITY RESO- NATOR WITH A MOVABLE WALL Hendrikus Wilhelmus van der Voorn and Bernardus Bastiaan van Iperen, Emmasingel, Eindhoven, Netherlands, assignors to North American Philips Company,
Inc., New York, N.Y., a corporation of Delaware Filed Oct. 8, 1959, Ser. No. 845,194 4 Claims. (Cl. 3155.22)
This invention relates to reflex klystrons, the reflector portion of which is secured to a movable wall of the cavity resonator which can be adjusted for controlling the natural frequency of the klystron.
It is common practice for the movable wall to be constituted by a diaphragm which is obtained by drawing and cold deforming sheet metal in templates. The diaphragm is soldered in position in the rigid portion of the wall of the cavity resonator, the reflector portion likewise being soldered to the diaphragm.
The known structure has the disadvantage that cracks are liable to occur in the being diaphragm drawn, whilst the diaphragm readily becomes brittle due to the solder flowing on too far and breaks off as a result of the rather considerable deformation which occurs in changing the frequency of a klystron. The length of life expressed in the number of possible changes of firequency is thus small.
An object of the invention is to provide a structure which afiords advantages with respect to the known type.
According to the invention, in a reflex klystron, the reflector portion of which is secured to a movable wall of the cavity resonator which can be moved for adjusting the natural frequency of the reflex klystron, the movable wall comprises a thin annular portion not obtained by drawing, having a solid edge which is secured by soldering to a portion of the cavity resonator which is not movable, whilst at the centre of the annular portion around the aperture to allow the passage of the electron beam there is provided a rigid cylindrical portion to which the reflector portion is soldered, the two solid portions and the sheet metal portion being manufactured from one piece of material. The soldered edges may readily be shaped so that solder does not flow on to the thin portion, nor to the aperture for the passage of the electron beam. According to the invention, the diaphragm with its two solid portions is preferably manufactured by turning from one piece of material. Manufacture by moulding is also possible.
In order that the invention may be readily carried into eflect, one embodiment will now be described in detail, by way of example, with reference to the accompanying drawing, in which:
FIG. 1 shows a reflex klystron having a cavity resonator with a movable wall according to the invention, and
FIG. 2 shows, on an enlarged scale, the separate wall portion before being soldered in position.
iatented Oct. 23,, 1962 ice In the figures, reference numeral 1 indicates the base of a bulb in which an electron gun 2 is arranged. A resonant cavity 3 is provided between a solid wall 4, a thin Wall 5 matched to the electron gun, and a movable Wall portion 6. The movable wall portion 6 is soldered by means of a thick edge 7 to the solid wall 4. A cylindrical extension 8, which is likewise solid, surrounds an aperture 9 to allow the passage of the electron beam. This beam is reflected by a reflector 10, which is supported by a structure comprising a fernico-cylinder which is soldered in position in a groove of extension 8. The fernico-cylinder 11 supports a glass cylinder 12 and a fernic-o-sleeve 13, to which the reflector \10 is secured. The soldering groove in 8 and the solid edge 7 are bevelled to accommodate a ring of solder. The dimensions of the diaphragm follow from the graduation in millimetres shown in FIG. 2. In this connection, it may be mentioned that the portion 6 is 0.20 mm. thick and the opening 9 has a diameter of 0.25 mm.
What is claimed is:
1. A reflex klystron comprising an envelope, an electron gun within a first portion said envelope, a first wall closing one end of said first envelope portion and having an aperture therein for the passage of an electron beam, a moveable wall spaced from and secured to said first wall, said moveable wall having an aperture therein aligned with the aperture in the first-mentioned wall for the passage of the electron beam, said walls together defining a resonant cavity, a second envelope portion secured to said moveable wall, and a reflector within said second envelope portion positioned to intercept and refleet the electron beam, said moveable wall comprising a thin annular portion of mechanically undeformed material having a rigid edge secured to said first wall portion and a rigid cylindrical portion surrounding said aperture to which the reflector is secured.
2. A reflex klystron as claimed in claim 1 in which the rigid edge is secured to the first wall portion by solder and the reflector is secured to the rigid cylindrical portion by solder, the edges of moveable wall portion which secure the same to the first wall portion and the collector being provided with grooves to prevent the flow of solder over the moveable wall.
3. A reflex klystron as claimed in claim 2 in which the moveable wall is a moulded material.
4. A reflex klystron as claimed in claim 2. in which the moveable wall is a machined piece of material.
References Cited in the file of this patent UNITED STATES PATENTS 2,420,314 Hansen May 13, 1947 2,451,813 Dickerson Oct. 19, 1948 2,874,327 La Plante Feb. 17, 1959 FOREIGN PATENTS 625,259 Great Britain June 24, 1949 UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent Noo 3 O6O 342 October 23 1962 Hendrikus Wilhelmus van der 'Voorn et al0 It is hereby certified that error appears in the above numbered patent requiring correction and that the said Letters Patent should read as corrected below a In the heading to the printed specification after line 8 insert the following:
Claims priority application Netherlands Nova 20 1958 Signed and sealed this 8th day of October 19630 ISEAL) Attest:
EDWIN L0 REYNOLDS ERNEST W. SWIDER Attesting Officer AC i g Commissioner of Patents
US845194A 1958-11-20 1959-10-08 Reflex klystron having a cavity resonator with a movable wall Expired - Lifetime US3060342A (en)

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NL233431 1958-11-20
US845194A US3060342A (en) 1958-11-20 1959-10-08 Reflex klystron having a cavity resonator with a movable wall

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3379922A (en) * 1965-04-07 1968-04-23 Sperry Rand Corp Tunable coupled cavity extended interaction electronic tube having deformable end wall

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2420314A (en) * 1943-04-26 1947-05-13 Sperry Gyroscope Co Inc High-frequency resonator-tube
US2451813A (en) * 1943-03-30 1948-10-19 Westinghouse Electric Corp Electron discharge device having an electron beam passage and aligning means therewith for the cathode
GB625259A (en) * 1943-12-22 1949-06-24 Standard Telephones Cables Ltd Electron discharge devices of the velocity modulation type
US2874327A (en) * 1954-11-19 1959-02-17 Philips Corp Klystron oscillator and method of adjusting same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2451813A (en) * 1943-03-30 1948-10-19 Westinghouse Electric Corp Electron discharge device having an electron beam passage and aligning means therewith for the cathode
US2420314A (en) * 1943-04-26 1947-05-13 Sperry Gyroscope Co Inc High-frequency resonator-tube
GB625259A (en) * 1943-12-22 1949-06-24 Standard Telephones Cables Ltd Electron discharge devices of the velocity modulation type
US2874327A (en) * 1954-11-19 1959-02-17 Philips Corp Klystron oscillator and method of adjusting same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3379922A (en) * 1965-04-07 1968-04-23 Sperry Rand Corp Tunable coupled cavity extended interaction electronic tube having deformable end wall

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