GB729930A - Improvements in or relating to electron discharge devices - Google Patents
Improvements in or relating to electron discharge devicesInfo
- Publication number
- GB729930A GB729930A GB16426/52A GB1642652A GB729930A GB 729930 A GB729930 A GB 729930A GB 16426/52 A GB16426/52 A GB 16426/52A GB 1642652 A GB1642652 A GB 1642652A GB 729930 A GB729930 A GB 729930A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electrons
- electrodes
- negative electrodes
- frequency
- electrode
- 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
Links
Classifications
-
- 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
- H03B9/00—Generation of oscillations using transit-time effects
- H03B9/01—Generation of oscillations using transit-time effects using discharge tubes
- H03B9/02—Generation of oscillations using transit-time effects using discharge tubes using a retarding-field tube
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
- H01J25/62—Strophotrons, i.e. tubes with H-field crossing the E-field and functioning with plural reflection
Abstract
729,930. High-frequency discharge apparatus. TELEFONAKTIEBOLAGET L. M. ERICSSON. June 30, 1952 [June 30, 1951], No. 16426/52. Class 39 (1). In an electron discharge tube oscillator or amplifier in which electrons oscillate, as in a Barkhausen-Kurz tube, between negative electrodes about a positive electrode and interact with a high-frequency electric field, a magnetic focusing field is provided to prevent the electrons from contacting the positive electrode, and a lateral drift motion is imparted to the electrons either by making the magnetic field inhomogeneous or by introducing an electric field or field component crossed with the magnetic field. The frequency of the high-frequency electric field is equal to, or a multiple of, or a submultiple of the frequency of oscillation of the electrons. The oscillating electrons drift in trochoidal paths, and are collected at the point where the amplitude of oscillation has fallen to zero. In the oscillator of Fig. 3, 1 is the cathode, 4, 41 the negative electrodes, 8 a resonant circuit connected between the negative electrodes, 2 the positive electrode, and 7 a collector electrode. The direction of the magnetic field is indicated by 5. The negative electrodes 4, 41 are inclined to one another so as to set up a parabolic potential distribution whereby the electrons oscillate with a frequency which is independent of their amplitude. The electron beam introduced from the cathode 1 may be intensity-modulated by further electrodes. Frequency modulation may be accomplished by applying an audio frequency voltage between the cathode and the negative electrodes. A bias voltage may be applied between these electrodes to control the average frequency of oscillation. In the amplifier tube of Fig. 5, three pairs of negative electrodes are arranged along the positive electrode (not shown). The signal voltage is applied between the electrodes 4, 4<SP>1</SP>, and the output voltage is taken from across the electrodes 24, 24<SP>1</SP>. Velocity-modulation imparted to the electrons between the electrodes 4, 4<SP>1</SP> is converted into intensity modulation in the field of the middle pair of negative electrodes, shown as connected together to form a single electrode 14. Grooves 10, 101 in the electrode 14 modify the field from a parabolic potential distribution in such a manner as to cause fast electrons to be delayed in relation to slower electrons by reason of their greater amplitude. Notches 11, 11<SP>1</SP> and 12, 121 are provided in the electrode pairs 4, 41 and 24, 241 for smooth transitions between the fields of the three sections. The electrode systems may be built into rectangular or circular wave-guides, Figs. 6 and 7 (not shown). The electrode system of Fig. 8 radiates energy directly. 25 is a permanent magnet coated on its inner surface with conductive material, for example silver, to form the negative electrodes 4, 4<SP>1</SP> and to serve as a resonator. In another arrangement, Fig. 9 (not shown), a central positive electrode is surrounded by a toroidal resonator. The magnetic field is axial and the electrons oscillate in a cylindrical surface. The arrangement of Fig. 3 may be modified by providing a greater penetration of the positive electrode 2 into the region between the negative electrodes 4, 4<SP>1</SP>. The positive electrode 2 is then provided with a slot 30, Fig. 10b, through which the electrons oscillate. Positive electrodes 29, 29<SP>1</SP> provide the electric field component which with the magnetic field imparts the electron drift motion. In the arrangement of Fig. 10c the positive electrode is in two parts 2, 2<SP>1</SP> and the resonant circuit 8 is connected between them. The arrangement of Fig. 10c may be modified to form an annular arrangement, Fig. 11 (not shown), in which the electrode system surrounds a central cylindrical permanent magnet having end polepieces of greater diameter. A plurality of cathodes lying in the plane of the negative electrodes are provided. The tubes may be operated as frequency multipliers. The possibility of providing an arrangement in which electrodes are shaped as delay lines for supporting travelling waves which interact with the electrons, is referred to. The negative electrodes may be wholly substituted by cathodes. A formula is given for adjusting the electron current in relation to electrode dimensions and spacings, and electric and magnetic spacings field strengths to reduce noise. Specification 558, 143 is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE311963X | 1951-06-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB729930A true GB729930A (en) | 1955-05-11 |
Family
ID=20307637
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB16426/52A Expired GB729930A (en) | 1951-06-30 | 1952-06-30 | Improvements in or relating to electron discharge devices |
Country Status (6)
Country | Link |
---|---|
US (1) | US2928992A (en) |
BE (1) | BE512463A (en) |
CH (1) | CH311963A (en) |
FR (2) | FR1074543A (en) |
GB (1) | GB729930A (en) |
NL (3) | NL170649B (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2897393A (en) * | 1957-09-17 | 1959-07-28 | Sylvania Electric Prod | Strophotron |
US2903620A (en) * | 1957-08-28 | 1959-09-08 | Sylvania Electric Prod | Microwave tube |
US2903619A (en) * | 1957-08-28 | 1959-09-08 | Sylvania Electric Prod | Microwave tube |
US2915666A (en) * | 1957-08-28 | 1959-12-01 | Sylvania Electric Prod | Microwave tube |
US2924741A (en) * | 1954-11-27 | 1960-02-09 | Alfven Hannes Olof Gosta | High frequency electron tube device |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB838804A (en) * | 1957-08-28 | 1960-06-22 | Sylvania Electric Prod | Microwave tube |
US3074875A (en) * | 1958-10-01 | 1963-01-22 | Alfven Hannes Olof Gosta | Generation of extremely high temperature |
DE2614234C2 (en) * | 1976-04-02 | 1982-05-27 | Metallgesellschaft Ag, 6000 Frankfurt | Treatment liquid for the corrosion protection of metal surfaces and concentrate for their production |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE491242A (en) * | 1948-12-10 | |||
US2755403A (en) * | 1952-10-22 | 1956-07-17 | Gen Electric | Magnetic motion transducer |
NL189628B (en) * | 1953-08-15 | Victor Company Of Japan | MAGNETIC TRANSDUCER HEAD. |
-
0
- NL NL192715D patent/NL192715A/xx unknown
- NL NL89027D patent/NL89027C/xx active
- BE BE512463D patent/BE512463A/xx unknown
- NL NLAANVRAGE7413753,A patent/NL170649B/en unknown
-
1952
- 1952-06-30 FR FR1074543D patent/FR1074543A/en not_active Expired
- 1952-06-30 CH CH311963D patent/CH311963A/en unknown
- 1952-06-30 GB GB16426/52A patent/GB729930A/en not_active Expired
-
1954
- 1954-11-23 FR FR67301D patent/FR67301E/en active Active
-
1957
- 1957-03-14 US US646169A patent/US2928992A/en not_active Expired - Lifetime
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2924741A (en) * | 1954-11-27 | 1960-02-09 | Alfven Hannes Olof Gosta | High frequency electron tube device |
US2903620A (en) * | 1957-08-28 | 1959-09-08 | Sylvania Electric Prod | Microwave tube |
US2903619A (en) * | 1957-08-28 | 1959-09-08 | Sylvania Electric Prod | Microwave tube |
US2915666A (en) * | 1957-08-28 | 1959-12-01 | Sylvania Electric Prod | Microwave tube |
US2897393A (en) * | 1957-09-17 | 1959-07-28 | Sylvania Electric Prod | Strophotron |
Also Published As
Publication number | Publication date |
---|---|
BE512463A (en) | |
CH311963A (en) | 1955-12-15 |
NL89027C (en) | |
NL170649B (en) | |
FR67301E (en) | |
NL192715A (en) | |
FR1074543A (en) | 1954-10-06 |
US2928992A (en) | 1960-03-15 |
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