GB649761A - Improvements in electron discharge devices of the electron velocity modulation type - Google Patents
Improvements in electron discharge devices of the electron velocity modulation typeInfo
- Publication number
- GB649761A GB649761A GB3987/46A GB398746A GB649761A GB 649761 A GB649761 A GB 649761A GB 3987/46 A GB3987/46 A GB 3987/46A GB 398746 A GB398746 A GB 398746A GB 649761 A GB649761 A GB 649761A
- Authority
- GB
- United Kingdom
- Prior art keywords
- resonator
- frequency
- bimetallic
- tube
- electron
- 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
- 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
-
- 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
- H01J25/06—Tubes having only one resonator, without reflection of the electron stream, and in which the modulation produced in the modulator zone is mainly velocity modulation, e.g. Lüdi-Klystron
- H01J25/08—Tubes having only one resonator, without reflection of the electron stream, and in which the modulation produced in the modulator zone is mainly velocity modulation, e.g. Lüdi-Klystron with electron stream perpendicular to the axis of the resonator
Landscapes
- Microwave Tubes (AREA)
- Spark Plugs (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
649,761. Velocity modulated tubes. STANDARD TELEPHONES & CABLES, Ltd. Feb. 8, 1946, No. 3987. [Class 39 (i)] A velocity modulated tube comprises inner and outer conductors defining between them a hollow resonator in which oscillations may be set up by the passage of an electron beam across two gaps between the inner and outer conductors, the inner conductor system being formed in part from at least one pair of opposed substantially rectangular metal plates between which the electron beam is adapted to be projected, the said inner conductor system comprising a bimetallic system adapted when heated to distort it in the neighbourhood of said gaps so as to alter the capacity thereacross. The bimetallic system may be arranged to eliminate changes of frequency with changes of temperature or may be arranged to adjust the frequency of the device. In the hollow resonator shown in Fig. 3 the outer conductor has fins 5 in line with two rectangular metal plates 7 forming the inner conductor which is spaced from the fins 5 by gaps 9. Each of the plates 7 has a central longitudinal slot 10 and two strips 11 of material, for example tungsten, of lower coefficient of thermal expansion than the rest. In a modification the strips are arranged diagonally. Fig. 6 shows a V.M. tube in which the resonator system of Fig. 3 is incorporated in order to maintain constant frequency and which comprises an annular metallic disc 14 bonded to the glass envelope 15 and to a glass cap 16 and fixed to the resonator 4 of Fig. 3. The disc 14 provides means for mounting the tube on the wall of a wave-guide so that the antenna 8 of the resonator 4 projects inside the cavity. The electrode system comprises an indirectly heated cathode 19 behind which is mounted a screen 20, a control grid 21 and a screen grid 22 which produce a ribbon-shaped beam of electrons which is projected through the resonator system to an anode 23. The primary focussing means is a magnetic field provided by field coils external to the tube. In a modification changes of frequency can be effected by providing the tube with a second electron beam arranged to heat the resonator system directly or indirectly by electron bombardment. The cathode could be enlarged and independent focussing means and control electrodes added to form the second beam. The temperature of the resonator system and hence the frequency is adjusted by variation of the potentials applied to the control electrodes of the second beam. Figs. 8 and 9 show a modified construction for changing the frequency in which each of the plates 7 is replaced by two parts 24 which overlap to form small gaps 26 and which are supported by members 25 formed of two lengths of bimetallic strips end-to-end and reversed in their direction of bend. The two parts 24 move in opposite directions when the bimetallic strips are heated by a second electron beam. In one arrangement the bimetallic member 25 nearer the cathode is bombarded by a portion of the second beam and has holes therein arranged to allow a further portion of this beam to impinge on the other bimetallic member.
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3987/46A GB649761A (en) | 1946-02-08 | 1946-02-08 | Improvements in electron discharge devices of the electron velocity modulation type |
FR939311D FR939311A (en) | 1946-02-08 | 1946-08-29 | Ultra Shortwave Oscillator Improvements |
US755550A US2608671A (en) | 1946-02-08 | 1947-06-19 | Electron discharge device of the electron velocity modulation type |
ES0178572A ES178572A1 (en) | 1946-02-08 | 1947-06-20 | IMPROVEMENTS IN ELECTRONIC DISCHARGE DEVICES OF THE TYPE OF MODULATION IN SPEED OF ELECTRONS |
FR57622D FR57622E (en) | 1946-02-08 | 1947-07-24 | Ultra-shortwave oscillator refinements |
NL136078A NL76852C (en) | 1946-02-08 | 1947-11-15 | |
BE478604D BE478604A (en) | 1946-02-08 | 1947-12-24 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3987/46A GB649761A (en) | 1946-02-08 | 1946-02-08 | Improvements in electron discharge devices of the electron velocity modulation type |
Publications (1)
Publication Number | Publication Date |
---|---|
GB649761A true GB649761A (en) | 1951-01-31 |
Family
ID=9768654
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3987/46A Expired GB649761A (en) | 1946-02-08 | 1946-02-08 | Improvements in electron discharge devices of the electron velocity modulation type |
Country Status (6)
Country | Link |
---|---|
US (1) | US2608671A (en) |
BE (1) | BE478604A (en) |
ES (1) | ES178572A1 (en) |
FR (2) | FR939311A (en) |
GB (1) | GB649761A (en) |
NL (1) | NL76852C (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2795764A (en) * | 1954-01-14 | 1957-06-11 | Westinghouse Electric Corp | Temperature compensated reference cavity |
US3601719A (en) * | 1969-10-09 | 1971-08-24 | Int Standard Electric Corp | Temperature-compensated waveguide resonator |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1884591A (en) * | 1929-04-01 | 1932-10-25 | Wired Radio Inc | Electric discharge tube |
GB422869A (en) * | 1932-11-12 | 1935-01-21 | Meaf Mach En Apparaten Fab Nv | Improvements in electric discharge devices |
GB537518A (en) * | 1939-12-22 | 1941-06-25 | Standard Telephones Cables Ltd | Improvements in or relating to electron discharge apparatus of the velocity modulated type |
US2424805A (en) * | 1942-11-13 | 1947-07-29 | Gen Electric | High-frequency magnetron |
US2413364A (en) * | 1943-06-12 | 1946-12-31 | Sylvania Electric Prod | Ultra high frequency oscillator |
-
1946
- 1946-02-08 GB GB3987/46A patent/GB649761A/en not_active Expired
- 1946-08-29 FR FR939311D patent/FR939311A/en not_active Expired
-
1947
- 1947-06-19 US US755550A patent/US2608671A/en not_active Expired - Lifetime
- 1947-06-20 ES ES0178572A patent/ES178572A1/en not_active Expired
- 1947-07-24 FR FR57622D patent/FR57622E/en not_active Expired
- 1947-11-15 NL NL136078A patent/NL76852C/xx active
- 1947-12-24 BE BE478604D patent/BE478604A/xx unknown
Also Published As
Publication number | Publication date |
---|---|
ES178572A1 (en) | 1947-08-16 |
FR939311A (en) | 1948-11-09 |
FR57622E (en) | 1953-03-17 |
US2608671A (en) | 1952-08-26 |
BE478604A (en) | 1948-06-24 |
NL76852C (en) | 1955-01-15 |
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