US2730650A - Very high frequency electron discharge tubes - Google Patents
Very high frequency electron discharge tubes Download PDFInfo
- Publication number
- US2730650A US2730650A US270022A US27002252A US2730650A US 2730650 A US2730650 A US 2730650A US 270022 A US270022 A US 270022A US 27002252 A US27002252 A US 27002252A US 2730650 A US2730650 A US 2730650A
- Authority
- US
- United States
- Prior art keywords
- tube
- annular
- electron discharge
- high frequency
- discharge tubes
- 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
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Classifications
-
- 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
- H01J25/04—Tubes having one or more resonators, without reflection of the electron stream, and in which the modulation produced in the modulator zone is mainly density modulation, e.g. Heaff tube
Definitions
- the invention relates to devices for very high radio frequencies, comprising an electric discharge tube, in which an electron beam modulated in intensity by means of the control-grid moves towards two high-potential, annular electrodes arranged after one another, a cavity resonator being'arranged to surround this tube externally between said limitation.
- a device for very high radio frequencies comprising an electric discharge tube, in
- annular electrodes arranged after one another, a cavity resonator being arranged to surround the tube externally between these annular electrodes, the resonator having a slit round about the tube and having a natural frequency which isequal to the frequency of the intensity modulation,'is characterized in that the insulating tube wall between the first high-potential electrode and the rear side of the slit in the cavity resonator is shaped in such a form that this wall is struck by electrons throughout its surface.
- a suitable form of a tube for use in the device according to the invention is one in which the tube diameter after the first annular electrode is reduced to such an extent that the internal diameter is slightly smaller than that of the preceding annular electrode, the diameter becoming gradually larger towards the second annular electrode.
- 1 designates a discharge tube made of quartz, comprising a cathode 2, a control-grid 3 and a collecting electrode 4; 5 and 6 designate annular electrodes and immediately after the first annular electrode the tube wall is constricted at 7, after Which it gradually widens towards the ring 6.
- a resonator is shown diagrammatically and designated by 8.
- An electron discharge system for very high frequencies comprising an electron discharge tube including an envelope, a cathode, a control grid, first and second high potential annular electrodes, and a collecting electrode arranged in that order in the envelope, said first annular electrode having a given internal diameter, a cavity resonator surrounding said envelope between said annular electrodes and having an annular gap facing said envelope, said envelope having a wall portion betweensaid first annular electrode and the side of said gap remote from said first annular electrode having a reentrant portion whose internal diameter is smaller than the internal diameter of said first annular electrode and tapers outwardly toward the second annular electrode, whereby the wall portion is struck throughout its surface by electrons emitted by said cathode.
- An electron discharge tube for use in systems for very high frequencies employing a cavity resonator external to the tube comprising an envelope, a cathode, a control grid, first and second high potential annular electrodes and a collecting electrode arranged in that order in the envelope, said first annular electrode having a given annular diameter, said envelope having a wall portion adjacent said first annular electrode' having a reentrant portion whose internal diameter is slightly smaller than the internal diameter of said the first annular electrode and tapers outwardly toward the second annular electrode, whereby the wall portion is struck throughout its surface by electrons emitted by said cathode.
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- Particle Accelerators (AREA)
- Discharge Lamp (AREA)
Description
1956 H. G. BRUUNING 2,730,650
VERY HIGH FREQUENCY ELECTRON DISCHARGE TUBES Filed Feb. 5, 1952 INVENTOR Hugo Georg Bruijning By %.(WW
Agent VERY HEGH FREQUENCY ELECTRUN DISCHARGE TUBES Hugo Georg Bruijning, Eindhoven, Netherlands, assignor to Hartford National Bank and Trust Company, Hartford, Conn., as trustee I Application February 5, 1952, Serial No. 270,022 Claims priority, application Netherlands March 29, 1951 2 Claims. c1. 315-5) The invention relates to devices for very high radio frequencies, comprising an electric discharge tube, in which an electron beam modulated in intensity by means of the control-grid moves towards two high-potential, annular electrodes arranged after one another, a cavity resonator being'arranged to surround this tube externally between said limitation.
According to the invention a device for very high radio frequencies, comprising an electric discharge tube, in
which an electron beam modulated in intensity with the use of a control-grid moves towards two high-potential,
annular electrodes arranged after one another, a cavity resonator being arranged to surround the tube externally between these annular electrodes, the resonator having a slit round about the tube and having a natural frequency which isequal to the frequency of the intensity modulation,'is characterized in that the insulating tube wall between the first high-potential electrode and the rear side of the slit in the cavity resonator is shaped in such a form that this wall is struck by electrons throughout its surface.
Thus, a stable operation of the tube is obtained, which may be ascribed to the positive charges of this wall owing to secondary emission. It is in fact necessary for the whole Wall betwen the two said points to be struck by electrons, since otherwise the intensity modulation of the beam itself or the potential variations of the electrodes might lead to an incessant variation of the border between the wall part struck by electrons and that which is not struck, from which instability arises. If a very high beam intensity and only comparatively weak concentration means are used, the aforesaid conditions may be readily fulfilled, if the tube diameter is not too large.
United States Patent 0 ice A suitable form of a tube for use in the device according to the invention is one in which the tube diameter after the first annular electrode is reduced to such an extent that the internal diameter is slightly smaller than that of the preceding annular electrode, the diameter becoming gradually larger towards the second annular electrode.
In order that the invention may be readily carried into elfect, an example will now be described in detail with reference to the single figure of the accompanying drawing, which is a longitudinal sectional view of a tube for use in a device according to the invention.
Referring to the figure, 1 designates a discharge tube made of quartz, comprising a cathode 2, a control-grid 3 and a collecting electrode 4; 5 and 6 designate annular electrodes and immediately after the first annular electrode the tube wall is constricted at 7, after Which it gradually widens towards the ring 6. A resonator is shown diagrammatically and designated by 8.
What I claim is:
1. An electron discharge system for very high frequencies comprising an electron discharge tube including an envelope, a cathode, a control grid, first and second high potential annular electrodes, and a collecting electrode arranged in that order in the envelope, said first annular electrode having a given internal diameter, a cavity resonator surrounding said envelope between said annular electrodes and having an annular gap facing said envelope, said envelope having a wall portion betweensaid first annular electrode and the side of said gap remote from said first annular electrode having a reentrant portion whose internal diameter is smaller than the internal diameter of said first annular electrode and tapers outwardly toward the second annular electrode, whereby the wall portion is struck throughout its surface by electrons emitted by said cathode.
2. An electron discharge tube for use in systems for very high frequencies employing a cavity resonator external to the tube comprising an envelope, a cathode, a control grid, first and second high potential annular electrodes and a collecting electrode arranged in that order in the envelope, said first annular electrode having a given annular diameter, said envelope having a wall portion adjacent said first annular electrode' having a reentrant portion whose internal diameter is slightly smaller than the internal diameter of said the first annular electrode and tapers outwardly toward the second annular electrode, whereby the wall portion is struck throughout its surface by electrons emitted by said cathode.
References Cited in the file of this patent UNITED STATES PATENTS 2,253,080 Maslov Aug. 19, 1941 2,394,055 Hansen Feb. 5, 1946 2,545,073 De Vries Mar. 13, 1951
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL300180X | 1951-03-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2730650A true US2730650A (en) | 1956-01-10 |
Family
ID=19783220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US270022A Expired - Lifetime US2730650A (en) | 1951-03-29 | 1952-02-05 | Very high frequency electron discharge tubes |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US2730650A (en) |
| BE (1) | BE510239A (en) |
| CH (1) | CH300180A (en) |
| DE (1) | DE918040C (en) |
| FR (1) | FR1053121A (en) |
| GB (1) | GB710462A (en) |
| NL (2) | NL160170B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3021448A (en) * | 1959-02-20 | 1962-02-13 | Trg Inc | Atomic beam frequency standard |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2253080A (en) * | 1940-03-21 | 1941-08-19 | Rca Corp | Resonant chamber circuit for use especially with inductive output tubes |
| US2394055A (en) * | 1941-11-04 | 1946-02-05 | Gen Electric | Wave impulse generator |
| US2545073A (en) * | 1944-06-14 | 1951-03-13 | Hartford Nat Bank & Trust Co | Device for amplifying or generating electric oscillations of very high frequency |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL46315C (en) * | 1934-03-20 |
-
0
- NL NL84700D patent/NL84700C/xx active
- NL NL7006047.A patent/NL160170B/en unknown
- BE BE510239D patent/BE510239A/xx unknown
-
1952
- 1952-02-05 US US270022A patent/US2730650A/en not_active Expired - Lifetime
- 1952-03-26 DE DEN5263A patent/DE918040C/en not_active Expired
- 1952-03-26 GB GB7750/52A patent/GB710462A/en not_active Expired
- 1952-03-27 FR FR1053121D patent/FR1053121A/en not_active Expired
- 1952-03-27 CH CH300180D patent/CH300180A/en unknown
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2253080A (en) * | 1940-03-21 | 1941-08-19 | Rca Corp | Resonant chamber circuit for use especially with inductive output tubes |
| US2394055A (en) * | 1941-11-04 | 1946-02-05 | Gen Electric | Wave impulse generator |
| US2545073A (en) * | 1944-06-14 | 1951-03-13 | Hartford Nat Bank & Trust Co | Device for amplifying or generating electric oscillations of very high frequency |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3021448A (en) * | 1959-02-20 | 1962-02-13 | Trg Inc | Atomic beam frequency standard |
Also Published As
| Publication number | Publication date |
|---|---|
| FR1053121A (en) | 1954-02-01 |
| BE510239A (en) | |
| DE918040C (en) | 1954-09-16 |
| GB710462A (en) | 1954-06-16 |
| NL160170B (en) | |
| NL84700C (en) | |
| CH300180A (en) | 1954-07-15 |
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