BE499425A - - Google Patents
Info
- Publication number
- BE499425A BE499425A BE499425DA BE499425A BE 499425 A BE499425 A BE 499425A BE 499425D A BE499425D A BE 499425DA BE 499425 A BE499425 A BE 499425A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/12—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical relative movement between primary active elements and secondary devices of antennas or antenna systems
- H01Q3/14—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical relative movement between primary active elements and secondary devices of antennas or antenna systems for varying the relative position of primary active element and a refracting or diffracting device
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P7/00—Resonators of the waveguide type
- H01P7/04—Coaxial resonators
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US128332A US2774967A (en) | 1949-11-19 | 1949-11-19 | Balanced doublet antenna of small dimension |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE499425A true BE499425A (fi) |
Family
ID=22434820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE499425D BE499425A (fi) | 1949-11-19 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2774967A (fi) |
| BE (1) | BE499425A (fi) |
| CH (1) | CH298003A (fi) |
| FR (1) | FR1027809A (fi) |
| GB (1) | GB677860A (fi) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2132022B (en) * | 1982-05-21 | 1985-07-24 | Decca Ltd | Radio frequency antenna and radio direction finding apparatus incorporating such antenna |
| FI80346C (fi) * | 1983-07-07 | 1990-05-10 | Instrumentarium Oy | Rf-spolarrangemang vid nmr-undersoekningsapparatur. |
| US4694255A (en) * | 1983-11-04 | 1987-09-15 | General Electric Company | Radio frequency field coil for NMR |
| US4692705A (en) * | 1983-12-23 | 1987-09-08 | General Electric Company | Radio frequency field coil for NMR |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE636809C (de) * | 1930-08-08 | 1936-10-17 | Rudolf Weyrich Dr | Vorrichtung zum Senden oder Empfangen elektromagnetischer Wellen mit in der Umgebungeiner Sende- oder Empfangsvorrichtung angeordneten Reflektoren |
| US2415094A (en) * | 1938-01-17 | 1947-02-04 | Board | Radio measurement of distances and velocities |
| GB550127A (en) * | 1940-12-12 | 1942-12-23 | Marconi Wireless Telegraph Co | Improvements in electromagnetic tapered wave-guide radiators |
| US2359620A (en) * | 1942-06-13 | 1944-10-03 | Rca Corp | Short wave antenna |
| US2465416A (en) * | 1943-10-02 | 1949-03-29 | Zenith Radio Corp | Resonant circuit and radiator |
| US2418084A (en) * | 1945-11-05 | 1947-03-25 | United Air Lines Inc | Antenna |
| US2539680A (en) * | 1945-11-26 | 1951-01-30 | Rca Corp | Ultra high frequency antenna |
| US2532919A (en) * | 1947-04-21 | 1950-12-05 | Johnson William Arthur | Radio aerial system, and particularly directive aerial system |
| US2572041A (en) * | 1947-10-29 | 1951-10-23 | Sperry Corp | Selective azimuth signaling system |
-
0
- BE BE499425D patent/BE499425A/xx unknown
-
1949
- 1949-11-19 US US128332A patent/US2774967A/en not_active Expired - Lifetime
-
1950
- 1950-07-28 GB GB18895/50A patent/GB677860A/en not_active Expired
- 1950-11-13 CH CH298003D patent/CH298003A/fr unknown
- 1950-11-17 FR FR1027809D patent/FR1027809A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2774967A (en) | 1956-12-18 |
| FR1027809A (fr) | 1953-05-15 |
| GB677860A (en) | 1952-08-20 |
| CH298003A (fr) | 1954-04-15 |