US3751704A - Delay lines cooled by liquid circulation and electronic tubes utilising such delay lines - Google Patents

Delay lines cooled by liquid circulation and electronic tubes utilising such delay lines Download PDF

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Publication number
US3751704A
US3751704A US00205632A US3751704DA US3751704A US 3751704 A US3751704 A US 3751704A US 00205632 A US00205632 A US 00205632A US 3751704D A US3751704D A US 3751704DA US 3751704 A US3751704 A US 3751704A
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United States
Prior art keywords
helix
turns
delay line
conductive
delay lines
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Expired - Lifetime
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US00205632A
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English (en)
Inventor
R Guillemet
P Ribout
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Thales SA
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Thomson CSF SA
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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
    • H01J23/005—Cooling methods or arrangements
    • 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

  • ABSTRACT 1 Foreign Application Data Delay line in the form of a helix for a travelling wave Dec. 30, 1970 France 7047286 tube is provided including a plurality of hollow conductive tube elements forming turns of the helix.
  • H0lj 25/34 for circulating fluid therethrough includes alter [58-] Field'of Search 313/30, 31, 32; nate feeds to each of said turns and alternate outputs 315/3.5 from each of said turns, said alternate feeds and out-' puts forming conductive elements coupled to the ex- [56] References Cited tremities of each of the conductive tube elements of the UNITED STATES PATENTS helix- 3,'617,798 11/1971 Marchcsc 313/31 X 5 Claims, 5 Drawing Figures PATENI'ED AUG 7 I975 SHEET 2 BF 2 Inventors POSERT GU/AL r 7 /52 95 9/5 -%m Zw M fi y a A ltorneys
  • the present invention relates to delay lines cooled by liquid circulation, as utilised in travelling wave tubes.
  • the object of the present invention is to overcome this drawback by making the whole of the line accessible to the cooling liquid.
  • the present invention relates to a helical delay line characterised in that each of the turns of said line is constituted wholly 'by a 'hollow conductor throug which the cooling liquid flows.
  • FIG. 1 is a fragmentary perspective view of a single helix delay line of the present invention.
  • FIG. 2 is a fragmentary perspective view of two of the single helix delay lines and FIG. 1 forming another embodiment of the present invention.
  • FIG. 3 is a fragmentary perspective view of yet another delay line utilizing the inventive concepts herein.
  • FIG. 4a is a variation of the embodiment of FIG. 3.
  • FIG. 4b is a detail of a portion of the embodiment of FIG. 4a.
  • FIG. 1 provides a fragmentary perspective view of a :single helix delay linel in accordance with the invention, associated with a cooling fluid distributor 3 with baffles 4, through the medium of components 2 and 7.
  • the helix proper is constituted by anassembly of bent metal tubes 1 connected with one another by conductive components 2.
  • the cooling fluid a dielectric liquid, for example, is suppliedto the line by the distributor 3; its circuit has been indicated :by arrows 51, 52,
  • FIG. 2 illustrates by way of example how, using two single helix delay lines as indicated earlier in FIG. 1, another delay line inaccordance with the invention can which is designed to enable the interpenetration of the two helices, due to their relatively small pitches.
  • the elements which make up said helices consist of metal tubes 1 and 11 previously shaped and connected to the fluid distribu-i tors 3 and 31 through the medium of conductor sections 2 and 21 and ceramic tubes 7 and 71.
  • the two helices are connected by electrically conductive bars E, E1, F Fl etc. at their closest point.
  • FIG. 3 illustrates another example of a delay line in accordance with the invention, again using bent metal tubes 1, 11.
  • the bars E, El, F, F1 in this case are integral with the conductor sections 2, 21 whereas in FIG. 2 they were separate elements on the other hand, the cooling fluid pipes are simplified: the inputs 51, 53 and the returns 50, 52 for the fluid are separate and no longer alternate in the same input and output distributor as in FIG. 1, so that the fluid distributors 3 and 31 no longer require baffles.
  • the inputs 2 and 7 and outputs 21 and 11 are coupled alternately to each of the turns similarly as in FIG. 1.
  • the fluid distributors can, thanks to the arrangement of the conductors 2, 21, be provided either with an input 31 and the return 3 at the same side or with an input 31 and the return 32 at op posite sides.
  • the elements of this kind of line are assembled together-by welding.
  • the delay line-shown in FIG. 4a is a variant embodiment of that of FIG. 3, in which we encounter once again the bent tubes 1, II and the bare E, El, F, F I which are integral with the conductor sections 2, 21 connected to the fluid-distributors 3, 31 by the ceramic tubes 7, 71.
  • the inputs 51, 53, and the returns 50, 52 for the fluid are marked by the arrowhead lines.
  • An assembly of this kind provides a choice in the positioning of the fluid distribution circuits for example, the circuit 3 positioned for fluid output in the direction A, can be rotated through 180 for output in the direction B, through for output in the direction C, or can for that matter be disposed in any other intermediate position.
  • the delay line shown in FIG. 4a is indistinguishable from that of FIG. 3 except for the replacement of the sleeves and straight tubes constituting the conductor sections 2, 21 by components of different shape.
  • the advantage of this arrangement resides in the great flexibility of positioning of the fluid distributors and also in the improved mechanical strengh during the operations of manufacture of the
  • the preparation of the line is effected as follows a
  • the invention is in no way limited to the examples described.
  • the metal tubes 1, 11 as shown in FIGS. 1, 2, 3, 4a may consist of tubes of an insulating material coated externally with an electrically conductive layer; the same applies to the-conductor sections 2, 21.
  • the invention also somprises the electronic tubes, whatever their other specifications, embodiying delay lines in accordance with the invention.
  • a delay line in the form of a helix for a travelling wave tube including:
  • a fluid distributor communicating with the tube elements for circulating cooling fluid therethrough including, alternate feeds to each of said turns and alternate outputs from each of said turns, said alternate feeds and outputs formed of conductive elements coupled to extremities of each of the tube elements of the helix.
  • the delay line as recited in claim 1 comprising:
  • a second helix interspaced with said first mentioned helix, each turn thereof coupled alternately with the input and output feeds; and further including:
  • electrically conductive bars for coupling each turn of said first mentioned helix with an adjacent turn of the second mentioned helix.
  • each of said bars are hollow, attached with the conductive portions of said turns and communicate with the cooling fluid.
  • the delay line as described in claim 1 is disposed in the travelling wave tube such that an electronic beam generated by the travelling wave tube travels down the axis of the helix amplifying a radio frequency wave traveling along the helix interacting therewith.

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US00205632A 1970-12-30 1971-12-07 Delay lines cooled by liquid circulation and electronic tubes utilising such delay lines Expired - Lifetime US3751704A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7047286A FR2120341A5 (enrdf_load_stackoverflow) 1970-12-30 1970-12-30

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US3751704A true US3751704A (en) 1973-08-07

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FR (1) FR2120341A5 (enrdf_load_stackoverflow)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2523049A (en) * 1945-06-23 1950-09-19 Gen Electric Water-cooled multicircuit magnetron
US2890384A (en) * 1953-09-24 1959-06-09 Raytheon Mfg Co Traveling wave electronic devices
US3246190A (en) * 1961-06-28 1966-04-12 Raytheon Co Fluid cooled traveling wave tube
US3273081A (en) * 1962-05-31 1966-09-13 Sperry Rand Corp Fluid-cooled slow-wave structure having alternating longitudinal and transverse extending portions
US3320471A (en) * 1962-04-09 1967-05-16 Raytheon Co High power amplifier having a cooling fluid manifold attached to the slowwave structure
US3400295A (en) * 1964-11-17 1968-09-03 Raytheon Co Matched transmission line coupling for electron discharge tube
US3617798A (en) * 1970-07-22 1971-11-02 Us Navy Fluid-cooling slow wave interaction structure for a traveling wave tube

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2523049A (en) * 1945-06-23 1950-09-19 Gen Electric Water-cooled multicircuit magnetron
US2890384A (en) * 1953-09-24 1959-06-09 Raytheon Mfg Co Traveling wave electronic devices
US3246190A (en) * 1961-06-28 1966-04-12 Raytheon Co Fluid cooled traveling wave tube
US3320471A (en) * 1962-04-09 1967-05-16 Raytheon Co High power amplifier having a cooling fluid manifold attached to the slowwave structure
US3273081A (en) * 1962-05-31 1966-09-13 Sperry Rand Corp Fluid-cooled slow-wave structure having alternating longitudinal and transverse extending portions
US3400295A (en) * 1964-11-17 1968-09-03 Raytheon Co Matched transmission line coupling for electron discharge tube
US3617798A (en) * 1970-07-22 1971-11-02 Us Navy Fluid-cooling slow wave interaction structure for a traveling wave tube

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FR2120341A5 (enrdf_load_stackoverflow) 1972-08-18

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