BE450801A - - Google Patents
Info
- Publication number
- BE450801A BE450801A BE450801DA BE450801A BE 450801 A BE450801 A BE 450801A BE 450801D A BE450801D A BE 450801DA BE 450801 A BE450801 A BE 450801A
- Authority
- BE
- Belgium
Links
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
- H01Q19/12—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces wherein the surfaces are concave
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
- E02B7/02—Fixed barrages
- E02B7/04—Dams across valleys
- E02B7/08—Wall dams
- E02B7/14—Buttress dams
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- 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
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE894823X | 1942-07-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
BE450801A true BE450801A (xx) | 1943-06-30 |
Family
ID=6847383
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE450801D BE450801A (xx) | 1942-07-18 | 1943-05-26 |
Country Status (2)
Country | Link |
---|---|
BE (1) | BE450801A (xx) |
FR (1) | FR894823A (xx) |
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1943
- 1943-05-20 FR FR894823D patent/FR894823A/fr not_active Expired
- 1943-05-26 BE BE450801D patent/BE450801A/xx unknown
Also Published As
Publication number | Publication date |
---|---|
FR894823A (fr) | 1945-01-08 |