US2141080A - Ultra-short-wave tube - Google Patents

Ultra-short-wave tube Download PDF

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Publication number
US2141080A
US2141080A US96689A US9668936A US2141080A US 2141080 A US2141080 A US 2141080A US 96689 A US96689 A US 96689A US 9668936 A US9668936 A US 9668936A US 2141080 A US2141080 A US 2141080A
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US
United States
Prior art keywords
grid
conductor
tube
internal
resonator
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
US96689A
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English (en)
Inventor
Dallenbach Walter
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.)
Julius Pintsch AG
Original Assignee
Julius Pintsch AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Julius Pintsch AG filed Critical Julius Pintsch AG
Application granted granted Critical
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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
    • H01J25/68—Tubes specially designed to act as oscillator with positive grid and retarding field, e.g. for Barkhausen-Kurz oscillators
    • H01J25/70—Tubes specially designed to act as oscillator with positive grid and retarding field, e.g. for Barkhausen-Kurz oscillators with resonator having distributed inductance with capacitance, e.g. Pintsch tube

Definitions

  • an electron tube with a chamber as a resonator which is bounded by an internal conductor and a coi-axial external conductor and the internal conductor of which is provided with a grid and in the interior of the grid with a co-axial cathode, whilst, for the purpose of producing a large iiywheel resistance of l the resonator, the distance between the internal and external conductors. is made largeV and is reduced only at the part serving for the exciting.
  • iiywheel resistance is to be understood the expression Z2; Z being the wave-resistance of a 35 Lecher conductor, namely the ratio (self induction) C capacity
  • Z2 being the wave-resistance of a 35 Lecher conductor, namely the ratio (self induction) C capacity
  • the reduction of the distance apart inthe chamber serving for exciting can be effected in twov ways: in the rst place by the increase of the diameter of the grid; and further by the provision of a pole-shoe-like Vannular body on the side of the external conductor that is turned towards the grid.
  • Figure 1 is a longitudinal section of one form of the invention.
  • Figure 2 is a section on line 2 2 of Figure 1.
  • Figure 3 is a vertical section of another form of the invention.
  • Figure 4 is a section on line 4-4 of Figure 3.
  • Figure 1 shows in longitudinal section and Figure 2 in cross section a tube, which corresponds substantially to a constructional example of application 43,788, with the characteristics according to the invention.
  • the hollow body surrounding the resonator consists'essentially of the cylindrical external conductor I and the concentric 5 internal conductor 2, 2 consisting of two sections.
  • the external and internal conductors are galvanically connected together by the circular annular disc 3.
  • the upper end of the external conductor is galvanically connected l0 through the circular annular disc 4 with the hol'- low cylinder 5, which forms the external conductor of a concentric high-frequency conducting device.
  • the section 2 of the internal'conductor is pro-longed, without variation of cross 15 section, by the internal conductor 6 of the highfrequency conducting device, which merges at its upper end into the rod antenna 1.
  • a 20 metal plate 8 which serves for the capacitive transmission ci the antenna current to the external conductor.
  • a cylindrical electrode 9 which is sup- 25 ported in the vessel-like hollow body I, 3, 4 by means of insulators I0. This completely enclosed. electrode 9 can be given a special bias by means of a lead I I that extends through the externa conductor and is insulated therefrom.
  • the distance between the internal conductor 2, 2 and the external conductor I or the enclosed electrode 9 is made great sorthat the resonator presents a 35 large wave resistance.
  • The. middle portion of the internal conductor, which is formed as a cylindrical grid I2 is made with a relatively large diameter so that a small distance apart, favourable for exciting, is maintained between the grid 40 and the electrode 9.
  • the wave resistance of the resonator is consequently small only at this place.
  • a hairpin-shaped cathode I4 Co-axially with and in the 45 interior of the grid there is a hairpin-shaped cathode I4, which is stressed by meansl of the helical spring I5 through the tension wire I 6.
  • the helical spring and the tension wire are 1ocated within the insulating body I1 and within 50 the hollow internal conductor 2 as well as 6.
  • the leads I8 pertaining to the cathode are introduced into the interior of the tube through and insulated from the portion of the internal conductor 2', which is likewise made hollow.
  • the lower end Q tenna The lower end Q tenna.
  • the tube serves preferably for the production of oscillations in the braking-held connection, in the case of which the external and internal conductors and consequently the grid receive a highly positive, and the completely enclosed electrode 9, a weakly positive or negative potential in relation to the cathode.
  • the two flanges I3, I3' which connect the grid with the two sections of the internal conductor, from receiving emission they are covered by discs 22, 22', which are connected in the present case with the cathode. In the case of an insulated arrangement of these discs they may be given a negative potential in relation to the cathode.
  • the mode of operation of the tube is in principle the same as follows:
  • the exciting chamber, the grid I2 and the electrode S serves as a concentrated capacity, and the eld chambers adjoining the two ends serve as self-inductances.
  • the eld chambers adjoining the two ends serve as self-inductances.
  • these On account of the cylindrical or disc-like formation of the conductors bounding the two self-inductances, these have a rectangular prole in longitudinal section.
  • the chamber between the electrode 9 and the external conductor I acts as a short-circuit condenser that is dissonant in relation to the natural frequency.
  • the length of the high frequency conducting device is, just as in the case of the tube of application 8,938 in the most favourable case M4- or an odd multiple thereof, so that a potential anti-node of the oscillation is formed at the place of transference between the en-ergy-conducting device and the an-
  • an optimum suiting of the antenna resistance to the resonator can be produced by the suitable choice oi the distance between the conductors 5 and
  • its length is not equal to M2, as in the case of the corresponding tube oi application 43,788, but is shorter, so that the ohmic resistance of the resonator is reduced and the path for conducting away the heat is shortened.
  • Figures 3 and 4 show in longitudinal section and in cross section a tube corresponding to the second constructional form.
  • the difference in comparison with the tubes represented in Figures 1 and 2 consists only in that the internal conductor of the resonator is provided with a grid of the same diameter and the cylindrical electrode 9 is provided on the side turned towards the grid with a pole-shoe-like annular body 23, by means of which the distance between the grid and the braking electrode is reduced.
  • the advantages of the first constructional form are present in this case also. In particular, by the shortening of the internal conductor the ohmic resistance of the resonator and the resistance to the conducting away of heat are considerably reduced.
  • An electron tube for ultra-high-frequency electromagnetic waves comprising a resonator formed as a hollow body substantially closed on all sides against radiation loss and defined in part by an internal conductor and a coaxial external conductor, a grid connected to said internal conductor, and a cathode disposed in the interior of the grid, the distance between the grid and external conductor being less than the distance between the internal and external conductors.
  • An electron tube for ultra-high-frequency electromagnetic waves comprising a resonator formed as a hollow body substantially closed on all sides arid defined in part by an internal conductor and a coaxial external conductor, a grid concentric with and connected to said internal conductor, andra cathode disposed in the interior oi the grid, the diameter of the grid being larger than the diameter of the internal conductor.
  • An electron tube for ultra-high-requency electromagnetic waves comprising a resonator formed as a hollow body substantially closed on all sides and defined in part by an internal conductor and a co-axial external conductor, a grid concentric with and connected to said internal conductor, and a cathode disposed'in the interior of the grid, the distance between the grid and external conductor being less than the distance between the internal and external conductors, the conductors Vdening the resonatoi ⁇ being cylindiically shaped7 the area of the internal conductor confining the grid-cathode space being covered by discs.
  • An electron tube for exciting ultra high irequency electro-magnetic oscillations comprising a resonator formed as a. hollow body substantially closed on all sides and dened in part by an internal conductor and a coaxial external conductor, a grid connected to said internal conductor, a plate surrounded by said external conductor, and a cathode disposed in the interior of the grid, the distance between the grid and external conductor being less than the distance between the internal and external conductors serving as electrodes.

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  • Microwave Tubes (AREA)
US96689A 1935-08-19 1936-08-18 Ultra-short-wave tube Expired - Lifetime US2141080A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE460700X 1935-08-19

Publications (1)

Publication Number Publication Date
US2141080A true US2141080A (en) 1938-12-20

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US96689A Expired - Lifetime US2141080A (en) 1935-08-19 1936-08-18 Ultra-short-wave tube

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US (1) US2141080A (enrdf_load_html_response)
BE (1) BE417047A (enrdf_load_html_response)
GB (1) GB460700A (enrdf_load_html_response)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2421273A (en) * 1943-02-25 1947-05-27 Gen Electric Ultra high frequency electric discharge device
US2429243A (en) * 1942-06-18 1947-10-21 Sperry Gyroscope Co Inc High-frequency tube structure
US2519420A (en) * 1939-03-08 1950-08-22 Univ Leland Stanford Junior Thermionic vacuum tube and circuit
US2591963A (en) * 1948-06-17 1952-04-08 Rca Corp Electron discharge device and circuit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2519420A (en) * 1939-03-08 1950-08-22 Univ Leland Stanford Junior Thermionic vacuum tube and circuit
US2429243A (en) * 1942-06-18 1947-10-21 Sperry Gyroscope Co Inc High-frequency tube structure
US2421273A (en) * 1943-02-25 1947-05-27 Gen Electric Ultra high frequency electric discharge device
US2591963A (en) * 1948-06-17 1952-04-08 Rca Corp Electron discharge device and circuit

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Publication number Publication date
BE417047A (enrdf_load_html_response)
GB460700A (en) 1937-02-02

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