US2596002A - Device for ultrahigh frequencies - Google Patents

Device for ultrahigh frequencies Download PDF

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Publication number
US2596002A
US2596002A US682986A US68298646A US2596002A US 2596002 A US2596002 A US 2596002A US 682986 A US682986 A US 682986A US 68298646 A US68298646 A US 68298646A US 2596002 A US2596002 A US 2596002A
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US
United States
Prior art keywords
anode
inner conductor
conductor
tube
resonator
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Expired - Lifetime
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US682986A
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English (en)
Inventor
Zaayer David
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.)
Hartford National Bank and Trust Co
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Hartford National Bank and Trust Co
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Filing date
Publication date
Application filed by Hartford National Bank and Trust Co filed Critical Hartford National Bank and Trust Co
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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/54—Amplifiers using transit-time effect in tubes or semiconductor devices
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/18—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising distributed inductance and capacitance
    • H03B5/1817—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising distributed inductance and capacitance the frequency-determining element being a cavity resonator
    • H03B5/1835—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising distributed inductance and capacitance the frequency-determining element being a cavity resonator the active element in the amplifier being a vacuum tube

Definitions

  • This invention relates to a device for ultra-high frequencies comprising at least one discharge tube, whose wall consists of insulating material and which has at least one anode and one cathode, at least the anode circuit including a resonator which is tuned to the operating frequency and consists of two coaxial conductors and is at least substantially closed on all sides.
  • a second problem one is faced with is related with the heating of the seals of the said connecting leadsi. e. those points of the wall of the tube, which may consist of glass, where the conductors conveying the high-frequency current are passed through this wall. This heating is due to the losses in the leads and may render the tube defective.
  • the tube l l is lodged within the tubular inner conductor 3 and this tube is coaxially surrounded by the end of the inner con ductor 3, which is not connected to the outer conductor, over a great part of the length of the anode 13 in such a manner that the anode I3 is capacitatively connected to the inner conductor 3.
  • auxiliary conductor [5 For supplying the required feed voltage to the anode conveying a high-frequency voltage use is made of coaxial auxiliary conductor [5 having the same shape and substantially the same section as the inner conductor 3 and being incorporated in the tubular inner conductor 3 in such a manner as to be insulated therefrom.
  • One end of this auxiliary conductor is connected through a short connecting lead to the anode 13, whereas the other end, which preferably slightly projects from the resonator I, is connected, through a connecting lead I! outside resonator, to a source of anode voltage I9.
  • of tube II is connected to the centre of the disc 9 through the intermediary of one or more connecting leads which are connected in parallel and are as short as possible.
  • This centre and the end of the inner conductor 3 surrounding the anode constitute the electric terminals of the resonator. Consequently, the grid and the anode of the tube H are connected respectively to the electric terminals of the resonator.
  • the device represented in the drawing is of a type known per se, in which the resonant circuit is interposed between grid and anode and the cathode is connected to a point of a capacitative potentiometer connected in parallel with the resonant circuit and consisting of the cathodeanode capacity and the cathode-grid capacity. Between the cathode and the earthed outer wall of the resonator is included a circuit that is substantially tuned to the frequency of the oscillations to be generated and in the device shown in the drawing is constituted by a coaxial transmission line consisting of the conductors 23 and 25..
  • the outer conductor 23 is connected to the earthed wall 9 of the resonator I in the proximity of the end facing the cathode, whereas the inner conductor 25 is earthed at the end of the resistance 3
  • the inner conductor 25, which serves at the same time for the supply of the required heating current, is tubular and contains the other heating lead which is insulated therefrom.
  • the disc 9 is provided with a central aperture through which the two heating leads are connected to the cathode 21.
  • the feed voltage for the cathode is supplied by a supply 29 one of whose terminals is earthed across the cathode resistance 3
  • the resistance 3I is preferably not bridged by a short-circuit condenser so that a negative back-coupling is present for the low frequencies thus preventing the tube II from oscillating at the desired frequency and. at the same time at a low frequency.
  • the transmission line 23, 25 is tunable by means of a short-circuit bridge 33 which is movable in an axial direction.
  • the bridge 33 is realised in such a manner that there is no electrical connection in regard to direct current between the conductors 23 and 25.
  • the inner conductor 3 is so realised as to be movable in an axial direction relatively to the tube II secured to the disc 9. With the aid of a screw 41 the inner conductor 3 can be fixed in the desired position.
  • the inner conductor 3 has a double wall and is equipped with two partitions extending in a plane through the axis of the inner conductor and dividing the space between the two walls of the inner conductor 3 into two compartments which communicate with each other at the end of the inner conductor surrounding the anode. These partitions are normal to the plane of the drawing; for clarity, however, they have not been represented.
  • the cooling liquid can be supplied through an inlet opening 49 at the end of the inner conductor remote from the anode I3 to one of the two compartments, and upon traversing the other compartment of the inner conductor it is carried off through an outlet opening 5
  • the inner side of the inner conductor 3 is coated with a black layer at the anode I3.
  • the tube I I is of the usual type, where the anode consists of carbon, an effective transfer of the heat to be dissipated is obtained in this manner by radiation.
  • An ultra high frequency electronic device comprising an electron discharge tube having an insulating envelope with a cathode, a grid and an elongated tubular anode enclosed therein, said grid and said cathode being coaxially positioned within said anode, a reentrant cavity resonator having a tubular outer conductor surrounding said tube and a tubular inner conductor coaxial with said outer conductor and connected to one end thereof, the other end of said outer conductor being closed, said tube being received within said inner conductor to an extent at which a portion of said anode is surrounded by said inner conductor to effect capacitive coupling for high frequencies therebetween, said envelope acting as a dielectric between said anode and said inner conductor, said grid being connected to said closed end of said outer conductor, a cylindrical conductor coaxially disposed within said inner conductor, means to apply an energizing potential through said cylindrical conductor to the anode of said tube, and an annular shorting bridge slidably arranged between said inner and outer conduct
  • An ultra high frequency electronic device comprising an electron discharge tube having an insulating envelope with a cathode, a grid and. an elongated tubular anode enclosed therein, said grid and said cathode being coaxially positioned within said anode, a reentrant cavity resonator having a tubular outer conductor surrounding said tube and a tubular inner conductor coaxial with said outer conductor and connected to one end thereof, the other end of said outer conductor being closed, said tube being received within said inner conductor to an extent at which a portion of said anode is surrounded by said inner conductor to effect capacitive coupling for high frequencies therebetween, said envelope acting as a dielectric between said anode and said inner conductor, said grid being connected to said closed end of said outer conductor, a cylindrical conductor coaxially disposed within said inner conductor, means to apply an energizing potential through said cylindrical conductor to the anode of said tube, an annular shorting bridge slidably arranged between said inner and outer conduct
  • An ultra high frequency electronic device comprising an electron discharge tube having a tubular insulating envelope with a cathode, a grid and an elongated tubular anode enclosed therein, said grid and said cathode being coaxially disposed within said anode, and a reentrant cavity resonator having a tubular outer conductor surrounding said tube and a tubular inner conductor coaxial with said outer conductor and connected to one end thereof, the other end of said outer conductor being closed, said tube being received coaxially within said inner conductor to an extent at which a portion of said anode is surrounded by said inner conductor to effect capacitive coupling therebetween, said envelope acting as dielectric between said anode and said inner conductor, said grid being connected to said closed end of said outer conductor.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
US682986A 1943-02-22 1946-07-12 Device for ultrahigh frequencies Expired - Lifetime US2596002A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL2596002X 1943-02-22

Publications (1)

Publication Number Publication Date
US2596002A true US2596002A (en) 1952-05-06

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ID=19874934

Family Applications (1)

Application Number Title Priority Date Filing Date
US682986A Expired - Lifetime US2596002A (en) 1943-02-22 1946-07-12 Device for ultrahigh frequencies

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US (1) US2596002A (en:Method)
BE (1) BE454482A (en:Method)
FR (1) FR912669A (en:Method)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2278210A (en) * 1940-07-05 1942-03-31 Bell Telephone Labor Inc Electron discharge device
US2284733A (en) * 1939-02-02 1942-06-02 Rca Corp Electron discharge device
US2312723A (en) * 1939-08-16 1943-03-02 Bell Telephone Labor Inc Electron discharge device
US2402600A (en) * 1942-01-22 1946-06-25 Standard Telephones Cables Ltd Electron discharge device
US2408355A (en) * 1942-01-29 1946-09-24 Rca Corp Concentric line oscillator
US2408927A (en) * 1942-07-30 1946-10-08 Gen Electric Filtering arrangement
US2409640A (en) * 1942-09-18 1946-10-22 Gen Electric Power cable for high-frequency oscillators
US2412998A (en) * 1942-02-07 1946-12-24 Int Standard Electric Corp Electron discharge device

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2284733A (en) * 1939-02-02 1942-06-02 Rca Corp Electron discharge device
US2312723A (en) * 1939-08-16 1943-03-02 Bell Telephone Labor Inc Electron discharge device
US2278210A (en) * 1940-07-05 1942-03-31 Bell Telephone Labor Inc Electron discharge device
US2402600A (en) * 1942-01-22 1946-06-25 Standard Telephones Cables Ltd Electron discharge device
US2408355A (en) * 1942-01-29 1946-09-24 Rca Corp Concentric line oscillator
US2412998A (en) * 1942-02-07 1946-12-24 Int Standard Electric Corp Electron discharge device
US2408927A (en) * 1942-07-30 1946-10-08 Gen Electric Filtering arrangement
US2409640A (en) * 1942-09-18 1946-10-22 Gen Electric Power cable for high-frequency oscillators

Also Published As

Publication number Publication date
BE454482A (en:Method) 1944-04-29
FR912669A (fr) 1946-08-16

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