LU74538A1 - - Google Patents
Info
- Publication number
- LU74538A1 LU74538A1 LU74538A LU74538A LU74538A1 LU 74538 A1 LU74538 A1 LU 74538A1 LU 74538 A LU74538 A LU 74538A LU 74538 A LU74538 A LU 74538A LU 74538 A1 LU74538 A1 LU 74538A1
- Authority
- LU
- Luxembourg
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
- H01Q17/001—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems for modifying the directional characteristic of an aerial
-
- 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
- H01Q19/18—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 having two or more spaced reflecting surfaces
- H01Q19/19—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 having two or more spaced reflecting surfaces comprising one main concave reflecting surface associated with an auxiliary reflecting surface
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7508072A FR2304192A1 (fr) | 1975-03-14 | 1975-03-14 | Antenne a reduction selective de gain |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| LU74538A1 true LU74538A1 (xx) | 1976-09-01 |
Family
ID=9152607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| LU74538A LU74538A1 (xx) | 1975-03-14 | 1976-03-12 |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US4096483A (xx) |
| JP (1) | JPS6035844B2 (xx) |
| BE (1) | BE839482A (xx) |
| CH (1) | CH600605A5 (xx) |
| DE (1) | DE2610506C2 (xx) |
| FR (1) | FR2304192A1 (xx) |
| GB (1) | GB1513521A (xx) |
| IT (1) | IT1057979B (xx) |
| LU (1) | LU74538A1 (xx) |
| NL (1) | NL177367C (xx) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2385233A1 (fr) * | 1977-03-25 | 1978-10-20 | Thomson Csf | Structure d'antenne a reflecteurs et notamment a reflecteurs excentres, et equipements de detection electromagnetique et de telecommunications spatiales comportant une telle structure |
| US4626863A (en) * | 1983-09-12 | 1986-12-02 | Andrew Corporation | Low side lobe Gregorian antenna |
| DE3402659A1 (de) * | 1984-01-26 | 1985-08-01 | Messerschmitt-Bölkow-Blohm GmbH, 8012 Ottobrunn | Reflektorantenne fuer den betrieb in mehreren frequenzbereichen |
| FR2568062B1 (fr) * | 1984-07-17 | 1986-11-07 | Thomson Alcatel Espace | Antenne bifrequence a meme couverture de zone a polarisation croisee pour satellites de telecommunications |
| GB8510724D0 (en) * | 1985-04-26 | 1985-06-05 | British Telecomm | Controlled attenuation of microwave signals |
| US5003321A (en) * | 1985-09-09 | 1991-03-26 | Sts Enterprises, Inc. | Dual frequency feed |
| ATE77514T1 (de) * | 1987-03-19 | 1992-07-15 | Siemens Ag | Zweireflektor-microwellen-richtantenne. |
| US4901086A (en) * | 1987-10-02 | 1990-02-13 | Raytheon Company | Lens/polarizer radome |
| US4866457A (en) * | 1988-11-08 | 1989-09-12 | The United States Of America As Represented By The Secretary Of Commerce | Covered inverted offset cassegrainian system |
| DE19630784C1 (de) * | 1996-07-31 | 1998-01-02 | Daimler Benz Aerospace Ag | Reflektorantenne |
| US6211834B1 (en) | 1998-09-30 | 2001-04-03 | Harris Corporation | Multiband ring focus antenna employing shaped-geometry main reflector and diverse-geometry shaped subreflector-feeds |
| US6169524B1 (en) * | 1999-01-15 | 2001-01-02 | Trw Inc. | Multi-pattern antenna having frequency selective or polarization sensitive zones |
| US6285332B1 (en) * | 1999-09-10 | 2001-09-04 | Trw Inc. | Frequency selective reflector |
| EP1137102A3 (en) * | 2000-03-20 | 2004-01-07 | The Boeing Company | Frequency variable aperture reflector |
| US6608607B2 (en) | 2001-11-27 | 2003-08-19 | Northrop Grumman Corporation | High performance multi-band frequency selective reflector with equal beam coverage |
| US6803883B2 (en) * | 2003-02-13 | 2004-10-12 | Spectrasite Communications, Inc. | Radio frequency electromagnetic emissions shield |
| EP1993166B1 (en) * | 2007-05-14 | 2020-10-07 | Saab AB | Antenna device |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2460869A (en) * | 1946-03-14 | 1949-02-08 | Rca Corp | Antenna |
| US3156917A (en) * | 1960-02-22 | 1964-11-10 | Marelli Lenkurt S P A | Antenna reflector and feed with absorbers to reduce back radiation to feed |
| US3101473A (en) * | 1960-04-14 | 1963-08-20 | Mcdonnell Aircraft Corp | Parabolic reflector with rim of absorbing material to attenuate side lobes |
| US3938152A (en) * | 1963-06-03 | 1976-02-10 | Mcdonnell Douglas Corporation | Magnetic absorbers |
| US3430245A (en) * | 1965-05-19 | 1969-02-25 | Whittaker Corp | Spherical reflector with lens to convert to parabolic surface |
| US3314071A (en) * | 1965-07-12 | 1967-04-11 | Gen Dynamics Corp | Device for control of antenna illumination tapers comprising a tapered surface of rf absorption material |
| GB1234778A (en) * | 1967-08-22 | 1971-06-09 | E M I Ltd Formerly Known As El | Improvements in or relating to surfaces for reflecting microwave energy |
| US3514781A (en) * | 1967-12-05 | 1970-05-26 | Us Army | Broadband,high gain antenna with relatively constant beamwidth |
| JPS5513162B2 (xx) * | 1973-09-14 | 1980-04-07 |
-
1975
- 1975-03-14 FR FR7508072A patent/FR2304192A1/fr active Granted
-
1976
- 1976-03-05 CH CH279776A patent/CH600605A5/xx not_active IP Right Cessation
- 1976-03-09 US US05/665,445 patent/US4096483A/en not_active Expired - Lifetime
- 1976-03-11 GB GB9864/76A patent/GB1513521A/en not_active Expired
- 1976-03-11 NL NLAANVRAGE7602556,A patent/NL177367C/xx not_active IP Right Cessation
- 1976-03-12 BE BE165087A patent/BE839482A/xx not_active IP Right Cessation
- 1976-03-12 DE DE2610506A patent/DE2610506C2/de not_active Expired
- 1976-03-12 IT IT48545/76A patent/IT1057979B/it active
- 1976-03-12 LU LU74538A patent/LU74538A1/xx unknown
- 1976-03-15 JP JP51028025A patent/JPS6035844B2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6035844B2 (ja) | 1985-08-16 |
| FR2304192B1 (xx) | 1982-04-30 |
| GB1513521A (en) | 1978-06-07 |
| DE2610506C2 (de) | 1982-03-04 |
| FR2304192A1 (fr) | 1976-10-08 |
| NL177367C (nl) | 1985-09-02 |
| IT1057979B (it) | 1982-03-30 |
| CH600605A5 (xx) | 1978-06-30 |
| JPS51139235A (en) | 1976-12-01 |
| US4096483A (en) | 1978-06-20 |
| BE839482A (fr) | 1976-07-01 |
| NL7602556A (nl) | 1976-09-16 |
| DE2610506A1 (de) | 1976-09-30 |
| NL177367B (nl) | 1985-04-01 |