FR2396434B1 - - Google Patents
Info
- Publication number
- FR2396434B1 FR2396434B1 FR7720371A FR7720371A FR2396434B1 FR 2396434 B1 FR2396434 B1 FR 2396434B1 FR 7720371 A FR7720371 A FR 7720371A FR 7720371 A FR7720371 A FR 7720371A FR 2396434 B1 FR2396434 B1 FR 2396434B1
- Authority
- FR
- France
- 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
- 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
- H01Q19/195—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 wherein a reflecting surface acts also as a polarisation filter or a polarising device
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/29—Combinations of different interacting antenna units for giving a desired directional characteristic
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
- H01Q25/001—Crossed polarisation dual antennas
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7720371A FR2396434A1 (fr) | 1977-07-01 | 1977-07-01 | Dispositif d'effacement des lobes secondaires d'une antenne du type " cassegrain a rotation de polarisation ", et systeme radar comportant un tel dispositif |
IT50115/78A IT1105244B (it) | 1977-07-01 | 1978-06-30 | Dispositivo per far scomparire i lobi secondari di un'antenna del tipo cassegrain a rotazione di polarizzazione |
DE2828807A DE2828807C2 (de) | 1977-07-01 | 1978-06-30 | Radar-Cassegrain-Antenne mit einem Primärstrahler, der mit zwei senkrecht zueinander polarisierten elektromagnetischen Wellen betrieben wird |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7720371A FR2396434A1 (fr) | 1977-07-01 | 1977-07-01 | Dispositif d'effacement des lobes secondaires d'une antenne du type " cassegrain a rotation de polarisation ", et systeme radar comportant un tel dispositif |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2396434A1 FR2396434A1 (fr) | 1979-01-26 |
FR2396434B1 true FR2396434B1 (it) | 1980-01-18 |
Family
ID=9192883
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7720371A Granted FR2396434A1 (fr) | 1977-07-01 | 1977-07-01 | Dispositif d'effacement des lobes secondaires d'une antenne du type " cassegrain a rotation de polarisation ", et systeme radar comportant un tel dispositif |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE2828807C2 (it) |
FR (1) | FR2396434A1 (it) |
IT (1) | IT1105244B (it) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2511196A1 (fr) * | 1981-08-07 | 1983-02-11 | Thomson Csf | Ensemble d'antennes principale et auxiliaires a balayage electronique et radar comportant un tel ensemble |
US4504835A (en) * | 1982-06-15 | 1985-03-12 | The United States Of America As Represented By The Secretary Of The Navy | Low sidelobe, high efficiency mirror antenna with twist reflector |
ES2050769T3 (es) * | 1988-12-05 | 1994-06-01 | Euratom | Antena que produce un haz de ondas milimetricas con una distribucion tipo gaussiano. |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1316780A (fr) * | 1962-02-22 | 1963-02-01 | Marconi Wireless Telegraph Co | Perfectionnements aux antennes pour radars |
FR1477571A (fr) * | 1966-02-25 | 1967-04-21 | Csf | Perfectionnements aux antennes à dispositif de focalisation |
-
1977
- 1977-07-01 FR FR7720371A patent/FR2396434A1/fr active Granted
-
1978
- 1978-06-30 IT IT50115/78A patent/IT1105244B/it active
- 1978-06-30 DE DE2828807A patent/DE2828807C2/de not_active Expired
Also Published As
Publication number | Publication date |
---|---|
IT7850115A0 (it) | 1978-06-30 |
DE2828807C2 (de) | 1985-09-12 |
DE2828807A1 (de) | 1979-01-18 |
FR2396434A1 (fr) | 1979-01-26 |
IT1105244B (it) | 1985-10-28 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |