LU63757A1 - - Google Patents
Info
- Publication number
- LU63757A1 LU63757A1 LU63757DA LU63757A1 LU 63757 A1 LU63757 A1 LU 63757A1 LU 63757D A LU63757D A LU 63757DA LU 63757 A1 LU63757 A1 LU 63757A1
- Authority
- LU
- Luxembourg
Links
Classifications
-
- 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
- H01Q19/02—Details
- H01Q19/021—Means for reducing undesirable effects
- H01Q19/026—Means for reducing undesirable effects for reducing the primary feed spill-over
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7031536A FR2101144B1 (en) | 1970-08-28 | 1970-08-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| LU63757A1 true LU63757A1 (en) | 1972-04-04 |
Family
ID=9060697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| LU63757D LU63757A1 (en) | 1970-08-28 | 1971-08-23 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3706999A (en) |
| BE (1) | BE771448A (en) |
| DE (1) | DE2141047A1 (en) |
| FR (1) | FR2101144B1 (en) |
| LU (1) | LU63757A1 (en) |
| NL (1) | NL7111608A (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3983560A (en) * | 1974-06-06 | 1976-09-28 | Andrew Corporation | Cassegrain antenna with improved subreflector for terrestrial communication systems |
| DE2954351C2 (en) * | 1979-05-22 | 1986-07-17 | Siemens AG, 1000 Berlin und 8000 München | Reflector antenna |
| DE2920781C2 (en) * | 1979-05-22 | 1984-07-12 | Siemens AG, 1000 Berlin und 8000 München | Reflector antenna, consisting of a main reflector, a primary radiator and a subreflector |
| US6778810B1 (en) * | 1999-12-03 | 2004-08-17 | The Directtv Group, Inc. | Method and apparatus for mitigating interference from terrestrial broadcasts sharing the same channel with satellite broadcasts using an antenna with posterior sidelobes |
| US7369809B1 (en) | 2000-10-30 | 2008-05-06 | The Directv Group, Inc. | System and method for continuous broadcast service from non-geostationary orbits |
| US6611238B1 (en) | 2001-11-06 | 2003-08-26 | Hughes Electronics Corporation | Method and apparatus for reducing earth station interference from non-GSO and terrestrial sources |
| US6975837B1 (en) | 2003-01-21 | 2005-12-13 | The Directv Group, Inc. | Method and apparatus for reducing interference between terrestrially-based and space-based broadcast systems |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3209361A (en) * | 1963-01-14 | 1965-09-28 | James E Webb | Cassegrainian antenna subreflector flange for suppressing ground noise |
| US3430244A (en) * | 1964-11-25 | 1969-02-25 | Radiation Inc | Reflector antennas |
| GB1190566A (en) * | 1966-07-04 | 1970-05-06 | Post Office | Aerials |
-
1970
- 1970-08-28 FR FR7031536A patent/FR2101144B1/fr not_active Expired
-
1971
- 1971-08-17 DE DE19712141047 patent/DE2141047A1/en active Pending
- 1971-08-18 BE BE771448A patent/BE771448A/en unknown
- 1971-08-23 LU LU63757D patent/LU63757A1/xx unknown
- 1971-08-24 NL NL7111608A patent/NL7111608A/xx unknown
- 1971-08-25 US US174600A patent/US3706999A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| NL7111608A (en) | 1972-03-01 |
| DE2141047A1 (en) | 1972-03-02 |
| FR2101144A1 (en) | 1972-03-31 |
| US3706999A (en) | 1972-12-19 |
| FR2101144B1 (en) | 1973-11-23 |
| BE771448A (en) | 1972-02-18 |