GB1496032A - Antennae - Google Patents
AntennaeInfo
- Publication number
- GB1496032A GB1496032A GB3561/75A GB356175A GB1496032A GB 1496032 A GB1496032 A GB 1496032A GB 3561/75 A GB3561/75 A GB 3561/75A GB 356175 A GB356175 A GB 356175A GB 1496032 A GB1496032 A GB 1496032A
- Authority
- GB
- United Kingdom
- Prior art keywords
- focus
- antenna
- subreflector
- feeds
- displaced
- Prior art date
- 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
- H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
-
- 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
Landscapes
- Aerials With Secondary Devices (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
1496032 Aerials WESTERN ELECTRIC CO Inc 28 Jan 1975 [31 Jan 1974] 3561/75 Heading H4A An antenna comprising a main reflector and smaller subreflector in an offset Cassegrain-type arrangement having a focus on the antenna axis has both reflectors displaced from the antenna axis 50 and disposed on opposite sides of a notional plane 59 and has a plurality of feeds 54, 55, 57, 58 (Fig. 6C) located about and displaced from the focus; the reflectors being arranged so that a point source at the focus would provide a beam whose axis impinges on the centre 60 of the main reflector 52. In the embodiment shown the feeds 54-58 are in an approximately straight line (Fig. 5, not shown) through the feed 56 at the focus, the subreflector 53 being enlarged (Fig. 6C) to compensate for spillover loss that would otherwise result. All the beam axes are directed on to the reflector centre 60. The feeds may be displaced in other directions located approximately in the focal plane. The enlarged subreflector 53 may deviate from a true hyperboloid portion and the main reflector may require reshaping from the true paraboloid portion. The antenna may be mounted on azimuth and elevation controls (Fig. 5, not shown.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US438201*A US3914768A (en) | 1974-01-31 | 1974-01-31 | Multiple-beam Cassegrainian antenna |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1496032A true GB1496032A (en) | 1977-12-21 |
Family
ID=23739668
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3561/75A Expired GB1496032A (en) | 1974-01-31 | 1975-01-28 | Antennae |
Country Status (9)
Country | Link |
---|---|
US (1) | US3914768A (en) |
JP (1) | JPS5821850B2 (en) |
BE (1) | BE824830A (en) |
CA (1) | CA994470A (en) |
DE (1) | DE2503594A1 (en) |
FR (1) | FR2260196B1 (en) |
GB (1) | GB1496032A (en) |
NL (1) | NL183556C (en) |
SE (1) | SE405528B (en) |
Families Citing this family (39)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4236161A (en) * | 1978-09-18 | 1980-11-25 | Bell Telephone Laboratories, Incorporated | Array feed for offset satellite antenna |
US4298877A (en) * | 1979-01-26 | 1981-11-03 | Solar Energy Technology, Inc. | Offset-fed multi-beam tracking antenna system utilizing especially shaped reflector surfaces |
US4282527A (en) * | 1979-06-11 | 1981-08-04 | General Dynamics, Pomona Division | Multi-spectral detection system with common collecting means |
FR2472853A1 (en) * | 1979-12-27 | 1981-07-03 | Thomson Csf | ANTENNA WITH AN ADJUSTABLE BEAM AND SATELLITE COMPRISING SUCH ANTENNA |
JPS5698905A (en) * | 1980-01-11 | 1981-08-08 | Kokusai Denshin Denwa Co Ltd <Kdd> | Dual reflecting mirror antenna |
US4355314A (en) * | 1980-11-28 | 1982-10-19 | Bell Telephone Laboratories, Incorporated | Wide-field-of-view antenna arrangement |
US4343000A (en) * | 1981-04-06 | 1982-08-03 | The United States Of America As Represented By The Secretary Of The Navy | Aircraft self-protection radar |
US4479129A (en) * | 1981-09-10 | 1984-10-23 | George Skahill | Directive antenna system employing a paraboloidal main dish and ellipsoidal subdish |
US4415901A (en) * | 1981-09-21 | 1983-11-15 | Bell Telephone Laboratories, Incorporated | Low power beam switchable antenna arrangement |
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 |
DE3204029A1 (en) * | 1982-02-05 | 1983-08-11 | Messerschmitt-Bölkow-Blohm GmbH, 8000 München | MULTI-REFLECTOR ANTENNA |
US4482897A (en) * | 1982-06-28 | 1984-11-13 | At&T Bell Laboratories | Multibeam segmented reflector antennas |
JPS5991708A (en) * | 1982-11-17 | 1984-05-26 | Mitsubishi Electric Corp | Antenna device |
US4535476A (en) * | 1982-12-01 | 1985-08-13 | At&T Bell Laboratories | Offset geometry, interference canceling receiver |
DE3516811C2 (en) * | 1985-05-10 | 1987-03-12 | Messerschmitt-Bölkow-Blohm GmbH, 8012 Ottobrunn | Geostationary communications satellite |
FR2608846B1 (en) * | 1986-12-18 | 1989-03-24 | Alcatel Thomson Faisceaux | TELECOMMUNICATIONS ANTENNA WITH REFLECTOR |
US4866454A (en) * | 1987-03-04 | 1989-09-12 | Droessler Justin G | Multi-spectral imaging system |
JPS63147013U (en) * | 1987-03-19 | 1988-09-28 | ||
DE3820920A1 (en) * | 1988-03-31 | 1989-11-16 | Franz Eisenhofer | Antenna arrangement |
US5202700A (en) * | 1988-11-03 | 1993-04-13 | Westinghouse Electric Corp. | Array fed reflector antenna for transmitting & receiving multiple beams |
GB2227609A (en) * | 1989-01-30 | 1990-08-01 | David James George Martin | Double aerial [daerial] |
ES1008936Y (en) * | 1989-01-31 | 1989-12-16 | Televes S.A. | SUPPORT FOR MULTISATELLITE PARABOLIC ANTENNA FEEDERS. |
US5175562A (en) * | 1989-06-23 | 1992-12-29 | Northeastern University | High aperture-efficient, wide-angle scanning offset reflector antenna |
DE4112837A1 (en) * | 1991-04-19 | 1992-10-22 | Teldix Gmbh | Aerial reflector swivel mechanism - has reflector fitted at free end of jib arm, rotatably mounted by its opposite end between two spaced, lever arms |
JP2882183B2 (en) * | 1992-04-24 | 1999-04-12 | ケイディディ株式会社 | Antenna device |
DE4311111A1 (en) * | 1993-04-05 | 1994-12-01 | Media Tech Vertriebs Gmbh | Antenna system having a main reflector and a subreflector |
FR2713404B1 (en) * | 1993-12-02 | 1996-01-05 | Alcatel Espace | Oriental antenna with conservation of polarization axes. |
US5563609A (en) * | 1994-05-16 | 1996-10-08 | Hughes Electronics | Antenna system with plural beam sequential offset |
FR2765404B1 (en) * | 1997-06-26 | 1999-09-24 | Alsthom Cge Alcatel | ANTENNA WITH HIGH SCANNING CAPACITY |
EA200001206A1 (en) * | 1998-05-20 | 2001-10-22 | Л-3 Коммьюникейшнз Эсско, Инк. | MULTI BANNER ANTENNA FOR SATELLITE COMMUNICATION, ANTENNA SYSTEM (OPTIONS) |
US7286096B2 (en) * | 2005-03-28 | 2007-10-23 | Radiolink Networks, Inc. | Aligned duplex antennae with high isolation |
EP2491615B1 (en) * | 2009-10-22 | 2015-12-23 | Lockheed Martin Corporation | Metamaterial lens feed for multiple beam antennas |
US9774095B1 (en) | 2011-09-22 | 2017-09-26 | Space Systems/Loral, Llc | Antenna system with multiple independently steerable shaped beams |
RU2012111441A (en) | 2012-03-26 | 2013-10-10 | Джи-хо Ан | COMPACT NON-AXISYMMETRIC TWO-MIRROR ANTENNA |
CN102749007B (en) * | 2012-07-16 | 2014-12-24 | 中国核动力研究设计院 | Gauge and method for measuring size of transformation position of minor-diameter deep hole |
US9806428B2 (en) | 2013-06-16 | 2017-10-31 | Siklu Communication ltd. | Systems and methods for forming, directing, and narrowing communication beams |
US9413078B2 (en) | 2013-06-16 | 2016-08-09 | Siklu Communication ltd. | Millimeter-wave system with beam direction by switching sources |
US9929474B2 (en) * | 2015-07-02 | 2018-03-27 | Sea Tel, Inc. | Multiple-feed antenna system having multi-position subreflector assembly |
KR101757681B1 (en) * | 2016-04-12 | 2017-07-26 | (주)인텔리안테크놀로지스 | Satellite communication antenna capable of receiving multi band signal |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1368820A (en) * | 1963-06-14 | 1964-08-07 | Csf | High performance aerial |
NL6818798A (en) * | 1968-01-02 | 1973-08-27 | ||
FR2153164B1 (en) * | 1971-09-22 | 1976-10-29 | Thomson Csf |
-
1974
- 1974-01-31 US US438201*A patent/US3914768A/en not_active Expired - Lifetime
- 1974-09-20 CA CA209,656A patent/CA994470A/en not_active Expired
-
1975
- 1975-01-21 SE SE7500631A patent/SE405528B/en not_active IP Right Cessation
- 1975-01-27 BE BE152750A patent/BE824830A/en not_active IP Right Cessation
- 1975-01-28 GB GB3561/75A patent/GB1496032A/en not_active Expired
- 1975-01-29 DE DE19752503594 patent/DE2503594A1/en active Granted
- 1975-01-30 NL NLAANVRAGE7501099,A patent/NL183556C/en not_active IP Right Cessation
- 1975-01-30 FR FR7502929A patent/FR2260196B1/fr not_active Expired
- 1975-01-31 JP JP50012657A patent/JPS5821850B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
AU7768575A (en) | 1976-07-29 |
DE2503594C2 (en) | 1988-04-14 |
JPS5821850B2 (en) | 1983-05-04 |
FR2260196A1 (en) | 1975-08-29 |
FR2260196B1 (en) | 1980-01-04 |
US3914768A (en) | 1975-10-21 |
SE405528B (en) | 1978-12-11 |
NL183556C (en) | 1988-11-16 |
NL183556B (en) | 1988-06-16 |
JPS50110253A (en) | 1975-08-30 |
NL7501099A (en) | 1975-08-04 |
SE7500631L (en) | 1975-08-01 |
BE824830A (en) | 1975-05-15 |
DE2503594A1 (en) | 1975-08-07 |
CA994470A (en) | 1976-08-03 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PE20 | Patent expired after termination of 20 years |
Effective date: 19950127 |