NL6818798A - - Google Patents
Info
- Publication number
- NL6818798A NL6818798A NL6818798A NL6818798A NL6818798A NL 6818798 A NL6818798 A NL 6818798A NL 6818798 A NL6818798 A NL 6818798A NL 6818798 A NL6818798 A NL 6818798A NL 6818798 A NL6818798 A NL 6818798A
- Authority
- NL
- Netherlands
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
- H01Q19/192—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 with dual offset reflectors
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB27468 | 1968-01-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL6818798A true NL6818798A (xx) | 1973-08-27 |
Family
ID=9701474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL6818798A NL6818798A (xx) | 1968-01-02 | 1968-12-30 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US3792480A (xx) |
| DE (1) | DE1817585A1 (xx) |
| FR (1) | FR1605256A (xx) |
| GB (1) | GB1331221A (xx) |
| NL (1) | NL6818798A (xx) |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3995275A (en) * | 1973-07-12 | 1976-11-30 | Mitsubishi Denki Kabushiki Kaisha | Reflector antenna having main and subreflector of diverse curvature |
| US3914768A (en) * | 1974-01-31 | 1975-10-21 | Bell Telephone Labor Inc | Multiple-beam Cassegrainian antenna |
| US3949404A (en) * | 1974-12-19 | 1976-04-06 | Nasa | Highly efficient antenna system using a corrugated horn and scanning hyperbolic reflector |
| US3953858A (en) * | 1975-05-30 | 1976-04-27 | Bell Telephone Laboratories, Incorporated | Multiple beam microwave apparatus |
| NL7509882A (nl) * | 1975-08-20 | 1977-02-22 | Vaclav Josef Vokurka | Antenne. |
| NL7608162A (nl) * | 1976-07-22 | 1978-01-24 | Vaclav Josef Vokurka | Antenne in het bijzonder voor meet- doeleinden. |
| US4145695A (en) * | 1977-03-01 | 1979-03-20 | Bell Telephone Laboratories, Incorporated | Launcher reflectors for correcting for astigmatism in off-axis fed reflector antennas |
| US4272769A (en) * | 1979-08-27 | 1981-06-09 | Young Frederick A | Microwave antenna with parabolic main reflector |
| US4339757A (en) * | 1980-11-24 | 1982-07-13 | Bell Telephone Laboratories, Incorporated | Broadband astigmatic feed arrangement for an antenna |
| US4343004A (en) * | 1980-11-24 | 1982-08-03 | Bell Telephone Laboratories, Incorporated | Broadband astigmatic feed arrangement for an antenna |
| US4407001A (en) * | 1981-10-02 | 1983-09-27 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Focal axis resolver for offset reflector antennas |
| DE3209513A1 (de) * | 1982-03-16 | 1984-02-09 | ANT Nachrichtentechnik GmbH, 7150 Backnang | Exzentrische parabolantenne mit geringer kreuzpolarisation |
| US4535338A (en) * | 1982-05-10 | 1985-08-13 | At&T Bell Laboratories | Multibeam antenna arrangement |
| DE3224257A1 (de) * | 1982-06-28 | 1983-12-29 | Siemens AG, 1000 Berlin und 8000 München | Mikrowellen-richtfunkantenne |
| US4491848A (en) * | 1982-08-30 | 1985-01-01 | At&T Bell Laboratories | Substantially frequency-independent aberration correcting antenna arrangement |
| US4482898A (en) * | 1982-10-12 | 1984-11-13 | At&T Bell Laboratories | Antenna feed arrangement for correcting for astigmatism |
| JPS60178709A (ja) * | 1984-02-24 | 1985-09-12 | Nippon Telegr & Teleph Corp <Ntt> | オフセツト複反射鏡アンテナ |
| US6417602B1 (en) | 1998-03-03 | 2002-07-09 | Sensotech Ltd. | Ultrasonic transducer |
| US6225961B1 (en) | 1999-07-27 | 2001-05-01 | Prc Inc. | Beam waveguide antenna with independently steerable antenna beams and method of compensating for planetary aberration in antenna beam tracking of spacecraft |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1368820A (fr) * | 1963-06-14 | 1964-08-07 | Csf | Aérien de hautes performances |
-
1968
- 1968-12-30 NL NL6818798A patent/NL6818798A/xx unknown
- 1968-12-31 DE DE19681817585 patent/DE1817585A1/de active Pending
- 1968-12-31 US US00790507A patent/US3792480A/en not_active Expired - Lifetime
- 1968-12-31 FR FR182875A patent/FR1605256A/fr not_active Expired
-
1969
- 1969-01-15 GB GB27468A patent/GB1331221A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1605256A (xx) | 1973-11-02 |
| DE1817585A1 (de) | 1974-08-01 |
| US3792480A (en) | 1974-02-12 |
| GB1331221A (en) | 1973-09-26 |