GB706909A - Improvements in or relating to electrical amplifying devices of the travelling wave kind - Google Patents
Improvements in or relating to electrical amplifying devices of the travelling wave kindInfo
- Publication number
- GB706909A GB706909A GB18847/50A GB1884750A GB706909A GB 706909 A GB706909 A GB 706909A GB 18847/50 A GB18847/50 A GB 18847/50A GB 1884750 A GB1884750 A GB 1884750A GB 706909 A GB706909 A GB 706909A
- Authority
- GB
- United Kingdom
- Prior art keywords
- conductor
- partitions
- helical
- conductors
- magnetic field
- 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
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
- H01J25/34—Travelling-wave tubes; Tubes in which a travelling wave is simulated at spaced gaps
- H01J25/36—Tubes in which an electron stream interacts with a wave travelling along a delay line or equivalent sequence of impedance elements, and without magnet system producing an H-field crossing the E-field
Landscapes
- Microwave Tubes (AREA)
Abstract
706,909. Magnetron amplifiers. M-O VALVE CO., Ltd., and CLARKE, G. M. Oct. 5, 1951 [July 27, 1950], No. 18847/50. Class 39(1) [Also in Group XL(b)] A travelling wave magnetron amplifier comprises two concentric cylindrical conductors between which a radial electric field is maintained and means are provided for setting up a circular magnetic field transverse to the radial electric field, and at least one of the conductors carries one or more helical partitions to form a coiled waveguide structure, one or more cathodes are arranged adjacent to the aligned slots between one conductor and a partition or partitions of the other conductor or between two partitions carried by the respective conductors and the structure is coupled to input and output circuits by straight sections of guide forming an integral part of the tube structure. In one form, Fig. 1, the inner conductor 1 is supported and spaced from the outer conductor 2 at each end by a glass annulus 3 sealed between flanges 4, 5 on the conductors. The conductor 2 carries a single helical partition 6 and the inner conductor is formed as an indirectly heated cathode, Fig. 2 (not shown). Input and output guide sections 9, 10 are soldered to apertures in the outer conductor, which serves as the evacuated envelope, and hermetically closed by glass windows 11, 12; 13 is a metal evacuation tube closed by cold-welding, or a glass tube may be used. The input wave may be of H 10 mode, 2 is kept positive with respect to I, and a unidirectional current is passed through 1 to set up a circular magnetic field and axial voltage gradient. The combination of the electric and magnetic fields gives the electrons an axial velocity which is correlated with the axial component of the wave velocity. The cathode is heated to emission temperature partly by the current through 1 and partly by the current through the heater (not shown). The axial voltage gradient is however not an essential feature. In a modification, Fig. 3 (not shown) the helical partition is secured to the inner conductor which is at higher D.C. positive potential than the outer conductor. A unidirectional current is passed through the inner conductor to generate the circular magnetic field and axial voltage gradient, and the outer conductor has an emissive coating and is heated by a coiled coil arrangement having as small a resultant magnetic field as possible. The inner conductor and helical partition may be formed in one piece by cutting a helical groove in a solid rod. In further modifications, the electron emission may be localized to a small region of the cathode, or a plurality of spaced cathodes may be used. A plurality of partitions may be used, and the turns of the helical guide may be spaced apart. Both conductors may be provided with one or more partitions but this is not preferred. The radial electrostatic field may be applied in pulses in which case the current setting up the magnetic field is pulsed synchronously; by varying the duration of the current pulses the cathode heating can be controlled.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB18847/50A GB706909A (en) | 1950-07-27 | 1950-07-27 | Improvements in or relating to electrical amplifying devices of the travelling wave kind |
US238270A US2760112A (en) | 1950-07-27 | 1951-07-24 | Electrical amplifying devices |
FR1046750D FR1046750A (en) | 1950-07-27 | 1951-07-26 | Improvements to electrical amplifying devices |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB18847/50A GB706909A (en) | 1950-07-27 | 1950-07-27 | Improvements in or relating to electrical amplifying devices of the travelling wave kind |
Publications (1)
Publication Number | Publication Date |
---|---|
GB706909A true GB706909A (en) | 1954-04-07 |
Family
ID=10119425
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB18847/50A Expired GB706909A (en) | 1950-07-27 | 1950-07-27 | Improvements in or relating to electrical amplifying devices of the travelling wave kind |
Country Status (3)
Country | Link |
---|---|
US (1) | US2760112A (en) |
FR (1) | FR1046750A (en) |
GB (1) | GB706909A (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2829300A (en) * | 1951-08-15 | 1958-04-01 | Bell Telephone Labor Inc | Traveling wave device |
US2897397A (en) * | 1955-04-21 | 1959-07-28 | Sylvania Electric Prod | Traveling wave tube |
US4851736A (en) * | 1988-06-03 | 1989-07-25 | Raytheon Company | Helical waveguide to rectangular waveguide coupler |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2122538A (en) * | 1935-01-22 | 1938-07-05 | American Telephone & Telegraph | Wave amplifier |
US2402184A (en) * | 1941-05-03 | 1946-06-18 | Bell Telephone Labor Inc | Ultra high frequency electronic device contained within wave guides |
US2439401A (en) * | 1942-09-10 | 1948-04-13 | Raytheon Mfg Co | Magnetron oscillator of the resonant cavity type |
NL78190C (en) * | 1946-01-11 | Western Electric Co | ||
NL139609B (en) * | 1947-03-27 | Amp Inc | CARD READER. | |
FR948762A (en) * | 1947-06-13 | 1949-08-10 | Csf | Tube of the magnetron type for ultra-short waves usable more particularly as an amplifier |
US2672572A (en) * | 1947-07-18 | 1954-03-16 | Philco Corp | Traveling wave tube |
US2541843A (en) * | 1947-07-18 | 1951-02-13 | Philco Corp | Electronic tube of the traveling wave type |
-
1950
- 1950-07-27 GB GB18847/50A patent/GB706909A/en not_active Expired
-
1951
- 1951-07-24 US US238270A patent/US2760112A/en not_active Expired - Lifetime
- 1951-07-26 FR FR1046750D patent/FR1046750A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US2760112A (en) | 1956-08-21 |
FR1046750A (en) | 1953-12-08 |
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