ZA751520B - An antenna with a beam of variable aperture, for operation in the millimetre waveband - Google Patents
An antenna with a beam of variable aperture, for operation in the millimetre wavebandInfo
- Publication number
- ZA751520B ZA751520B ZA00751520A ZA751520A ZA751520B ZA 751520 B ZA751520 B ZA 751520B ZA 00751520 A ZA00751520 A ZA 00751520A ZA 751520 A ZA751520 A ZA 751520A ZA 751520 B ZA751520 B ZA 751520B
- Authority
- ZA
- South Africa
- Prior art keywords
- antenna
- variable aperture
- millimetre waveband
- millimetre
- waveband
- Prior art date
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
- H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
- H01Q25/002—Antennas or antenna systems providing at least two radiating patterns providing at least two patterns of different beamwidth; Variable beamwidth antennas
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7408257A FR2264407B1 (en) | 1974-03-12 | 1974-03-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
ZA751520B true ZA751520B (en) | 1976-02-25 |
Family
ID=9136147
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ZA00751520A ZA751520B (en) | 1974-03-12 | 1975-03-12 | An antenna with a beam of variable aperture, for operation in the millimetre waveband |
Country Status (7)
Country | Link |
---|---|
BE (1) | BE826544A (en) |
DE (1) | DE2510574A1 (en) |
FR (1) | FR2264407B1 (en) |
GB (1) | GB1488590A (en) |
IT (1) | IT1032256B (en) |
NL (1) | NL7502818A (en) |
ZA (1) | ZA751520B (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2947910C2 (en) * | 1979-11-28 | 1982-05-27 | Siemens AG, 1000 Berlin und 8000 München | Cassegrain antenna |
GB2268834B (en) * | 1980-12-04 | 1994-06-22 | Racal Mesl Ltd | Radar arrangements and methods of detecting different types of targets |
FR2648278A1 (en) * | 1989-06-13 | 1990-12-14 | Europ Agence Spatiale | Antenna with switchable beams |
DE10344535A1 (en) * | 2003-09-25 | 2005-04-28 | Adc Automotive Dist Control | reflector antenna |
DE102007027975A1 (en) * | 2007-06-19 | 2008-12-24 | Robert Bosch Gmbh | Sensor device for a motor vehicle |
US11621494B2 (en) * | 2020-09-21 | 2023-04-04 | Nokia Shanghai Bell Co., Ltd. | Feed for an antenna system comprising a sub-reflector and a main reflector |
-
1974
- 1974-03-12 FR FR7408257A patent/FR2264407B1/fr not_active Expired
-
1975
- 1975-03-07 GB GB9703/75A patent/GB1488590A/en not_active Expired
- 1975-03-10 IT IT7548531A patent/IT1032256B/en active
- 1975-03-10 NL NL7502818A patent/NL7502818A/en not_active Application Discontinuation
- 1975-03-11 DE DE19752510574 patent/DE2510574A1/en active Pending
- 1975-03-11 BE BE154222A patent/BE826544A/en unknown
- 1975-03-12 ZA ZA00751520A patent/ZA751520B/en unknown
Also Published As
Publication number | Publication date |
---|---|
FR2264407A1 (en) | 1975-10-10 |
AU7885275A (en) | 1976-09-09 |
FR2264407B1 (en) | 1978-02-10 |
IT1032256B (en) | 1979-05-30 |
NL7502818A (en) | 1975-09-16 |
BE826544A (en) | 1975-06-30 |
GB1488590A (en) | 1977-10-12 |
DE2510574A1 (en) | 1975-09-18 |
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