WO2000011752A1 - One-dimensional interleaved multi-beam antenna - Google Patents
One-dimensional interleaved multi-beam antenna Download PDFInfo
- Publication number
- WO2000011752A1 WO2000011752A1 PCT/US1999/014764 US9914764W WO0011752A1 WO 2000011752 A1 WO2000011752 A1 WO 2000011752A1 US 9914764 W US9914764 W US 9914764W WO 0011752 A1 WO0011752 A1 WO 0011752A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- antenna system
- beams
- feed
- feed horns
- reflector
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/02—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical movement of antenna or antenna system as a whole
- H01Q3/08—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical movement of antenna or antenna system as a whole for varying two co-ordinates of the orientation
- H01Q3/10—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical movement of antenna or antenna system as a whole for varying two co-ordinates of the orientation to produce a conical or spiral scan
-
- 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
- H01Q19/12—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 wherein the surfaces are concave
- H01Q19/13—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 wherein the surfaces are concave the primary radiating source being a single radiating element, e.g. a dipole, a slot, a waveguide termination
- H01Q19/132—Horn reflector antennas; Off-set feeding
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/28—Adaptation for use in or on aircraft, missiles, satellites, or balloons
- H01Q1/288—Satellite antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/08—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a rectilinear path
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S343/00—Communications: radio wave antennas
- Y10S343/02—Satellite-mounted antenna
Definitions
- the present invention relates generally to spacecraft communication systems, and more particularly, to a one-dimensional interleaved multi-beam antenna system tor use in spacecraft communication systems
- the assignee of the present invention manufactures and deploys communication satellites. In order to provide desired coverage of a particular area on the Earth, and maximize re-use of the allocated frequency spectrum, it is necessary to use an interleaved multi-beam antenna system
- the present invention provides for an efficient multi-beam antenna system for use with a high capacity communications satellite that maximizes frequency re-use of the allocated frequency spectrum.
- the antenna system comprises first and second offset reflectors that are disposed adjacent first and second sides of the spacecraft.
- a first plurality of the feed horns feed the first reflector, and a second plurality of the feed horns feed the second reflector.
- the feed horns and first and second offset reflectors cooperate to produce a predetermined number of beams.
- Even numbered beams use a set of frequencies and polarizations that are orthogonal to a set of frequencies and polarizations used by odd numbered beams.
- the antenna beams are contiguous in one dimension.
- the antenna system thus generates antenna beams that are contiguous in one dimension as opposed to localizing them on a two dimensional triangular or rectangular lattice as in conventional antenna systems.
- the antenna system also incorporates a frequency and polarization re-use plan that allows the use of non-contiguous output multiplexers.
- the design of the antenna system requires fewer apertures (2 instead of 4, for example) for the same spillover loss compared to a conventional reflector or lens multi- beam antenna system.
- the antenna system also provides twice the bandwidth per beam (produced by a conventional multi-beam antenna system with a 4 sub-band frequency re-use pattern) while producing equivalent or better beam to beam isolation.
- antenna apertures are not limited. Antenna systems may be readily designed using the principles of the present invention that employ a single multi-beam phased array to achieve similar coverage.
- Fig. 1 illustrates a typical spacecraft employing an antenna system in accordance with the principles of the present invention:
- Fi ⁇ . 2 illustrates directivity contours produced by optimized shaped reflectors used in an exemplary embodiment of the present antenna system: and Fig. 3 illustrates a sample frequency plan for an exemplary embodiment of the present antenna system.
- Fig. 1 illustrates a typical spacecraft 11 employing an antenna system 10 in accordance with the principles of the present invention.
- the spacecraft 11 is shown having its nadir face 12 pointing in the direction of coverage beams 15 (Fig. 2) produced by the antenna system 10, namely toward the Earth , and in particular the United States, for example, as is illustrated in Fig. 2.
- the antenna system 10 comprises two offset reflectors 13e, 13w that are disposed adjacent east and west sides of the spacecraft 11.
- the antenna system 10 further comprises a predetermined even number (eight) of feed horns 14, including first and second pluralities (four) of feed horns 14e, 14w that respectively feed each of the reflectors
- the antenna beams 15 generated by the antenna system 10 are contiguous in
- the antenna system 10 includes two relatively large (3.5 by 2.4 meter) shaped offset reflectors 13e. 13w operated in the Ku FSS band (12 GHz).
- the four feed horns 14 for each reflector 13e, 13w are aligned to produce 8 beams 15 numbered 1 to 8 from west to east as shown in Fig. 2.
- the west reflector 13w produces odd numbered beams 15 while the east reflector 13e produces even numbered beams 15.
- the antenna beams 15 generated by the antenna system 10 are contiguous in one dimension, as is shown in Fig. 2. More particularly, Fig. 2 shows 38.25 dB directivity contours produced by opt i mized shaped reflectors 13e, 13w used in an exemplary embodiment of the antenna system 10.
- the directivity contours are configured to completely cover the United States in the manner shown in Fig. 2.
- Each odd numbered beam 15 uses the same frequencies and polarizations.
- the even numbered beams 15 use a set of frequenc i es and polarizations that are orthogonal to those used by the odd numbered beams 15.
- F i g. 3 shows a sample frequency plan for an exemplary embodiment of the antenna system 10 used to provide coverage of the United States as shown in Fig. 2.
- the number of beams produced by the present invention is not limited to 8 as is disclosed in the exemplary embodiment.
- the antenna system 10 may produce different numbers of beam suitable for different applications
- antenna systems 10 may be readily designed that use 12 beams , for example.
- the frequency plan and frequency band may be different from those used in the disclosed exemplary embodiment, and the present invention is not limited to any particular operating frequency band.
- the concepts of the present i nvention may be used to produce antenna systems 10 that operate in the S. C. X. Ku. K. Ka. Q , V. or W frequency bands, for example, or other desired frequency band as the application requires.
- adjacent beams use two different polarization and frequency plans irrespective of the number of beams or operating frequency band. It is to be understood that the choice of the type and the number of antenna apertures are not limited to those chosen in the exemplary embodiment. For example, antenna systems may be readily designed that employ a single multi-beam phased array to achieve similar coverage.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99956473A EP1105936A1 (en) | 1998-08-22 | 1999-06-29 | One-dimensional interleaved multi-beam antenna |
AU13075/00A AU1307500A (en) | 1998-08-22 | 1999-06-29 | One-dimensional interleaved multi-beam antenna |
JP2000566919A JP2002523950A (en) | 1998-08-22 | 1999-06-29 | One-dimensional interleaved multiple beam antenna |
KR1020017002267A KR20010072866A (en) | 1998-08-22 | 1999-06-29 | One-dimensional interleaved multi-beam antenna |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/138,601 US5963175A (en) | 1998-08-22 | 1998-08-22 | One dimensional interleaved multi-beam antenna |
US09/138,601 | 1998-08-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000011752A1 true WO2000011752A1 (en) | 2000-03-02 |
Family
ID=22482766
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1999/014764 WO2000011752A1 (en) | 1998-08-22 | 1999-06-29 | One-dimensional interleaved multi-beam antenna |
Country Status (6)
Country | Link |
---|---|
US (1) | US5963175A (en) |
EP (1) | EP1105936A1 (en) |
JP (1) | JP2002523950A (en) |
KR (1) | KR20010072866A (en) |
AU (1) | AU1307500A (en) |
WO (1) | WO2000011752A1 (en) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6188385B1 (en) | 1998-10-07 | 2001-02-13 | Microsoft Corporation | Method and apparatus for displaying images such as text |
US6307566B1 (en) | 1998-10-07 | 2001-10-23 | Microsoft Corporation | Methods and apparatus for performing image rendering and rasterization operations |
CN1175391C (en) | 1998-10-07 | 2004-11-10 | 微软公司 | Mapping samples of foreground/background color image data to pixel sub-components |
US6278434B1 (en) | 1998-10-07 | 2001-08-21 | Microsoft Corporation | Non-square scaling of image data to be mapped to pixel sub-components |
US7215954B1 (en) | 1999-03-18 | 2007-05-08 | The Directv Group, Inc. | Resource allocation method for multi-platform communication system |
US6342896B1 (en) | 1999-03-19 | 2002-01-29 | Microsoft Corporation | Methods and apparatus for efficiently implementing and modifying foreground and background color selections |
US6342890B1 (en) | 1999-03-19 | 2002-01-29 | Microsoft Corporation | Methods, apparatus, and data structures for accessing sub-pixel data having left side bearing information |
US6339426B1 (en) | 1999-04-29 | 2002-01-15 | Microsoft Corporation | Methods, apparatus and data structures for overscaling or oversampling character feature information in a system for rendering text on horizontally striped displays |
WO2002001753A1 (en) * | 2000-06-28 | 2002-01-03 | Mitsubishi Denki Kabushiki Kaisha | Satellite communication system |
US7369847B1 (en) | 2000-09-14 | 2008-05-06 | The Directv Group, Inc. | Fixed cell communication system with reduced interference |
US7369809B1 (en) | 2000-10-30 | 2008-05-06 | The Directv Group, Inc. | System and method for continuous broadcast service from non-geostationary orbits |
US6388634B1 (en) * | 2000-10-31 | 2002-05-14 | Hughes Electronics Corporation | Multi-beam antenna communication system and method |
US6947740B2 (en) * | 2002-06-13 | 2005-09-20 | Spacecode Llc | Communication satellite in a satellite communication system with high aspect ratio cell arrangement and shared and allocable bandwidth |
WO2018126290A1 (en) * | 2016-12-31 | 2018-07-05 | Hughes Network Systems, Llc | Approaches for improved frequency reuse efficiency and interference avoidance for a multi-beam satellite communications network |
CN112563762B (en) * | 2020-11-27 | 2022-11-11 | 西安空间无线电技术研究所 | One-driving-four-time unfolding antenna control method |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4343005A (en) * | 1980-12-29 | 1982-08-03 | Ford Aerospace & Communications Corporation | Microwave antenna system having enhanced band width and reduced cross-polarization |
US4482897A (en) * | 1982-06-28 | 1984-11-13 | At&T Bell Laboratories | Multibeam segmented reflector antennas |
US5373302A (en) * | 1992-06-24 | 1994-12-13 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Double-loop frequency selective surfaces for multi frequency division multiplexing in a dual reflector antenna |
US5402137A (en) * | 1992-09-17 | 1995-03-28 | Hughes Aircraft Company | Equalized shaped reflector antenna system and technique for equalizing same |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
-
1998
- 1998-08-22 US US09/138,601 patent/US5963175A/en not_active Expired - Fee Related
-
1999
- 1999-06-29 JP JP2000566919A patent/JP2002523950A/en active Pending
- 1999-06-29 AU AU13075/00A patent/AU1307500A/en not_active Abandoned
- 1999-06-29 EP EP99956473A patent/EP1105936A1/en not_active Withdrawn
- 1999-06-29 KR KR1020017002267A patent/KR20010072866A/en not_active Application Discontinuation
- 1999-06-29 WO PCT/US1999/014764 patent/WO2000011752A1/en not_active Application Discontinuation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4343005A (en) * | 1980-12-29 | 1982-08-03 | Ford Aerospace & Communications Corporation | Microwave antenna system having enhanced band width and reduced cross-polarization |
US4482897A (en) * | 1982-06-28 | 1984-11-13 | At&T Bell Laboratories | Multibeam segmented reflector antennas |
US5373302A (en) * | 1992-06-24 | 1994-12-13 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Double-loop frequency selective surfaces for multi frequency division multiplexing in a dual reflector antenna |
US5402137A (en) * | 1992-09-17 | 1995-03-28 | Hughes Aircraft Company | Equalized shaped reflector antenna system and technique for equalizing same |
Also Published As
Publication number | Publication date |
---|---|
US5963175A (en) | 1999-10-05 |
JP2002523950A (en) | 2002-07-30 |
AU1307500A (en) | 2000-03-14 |
KR20010072866A (en) | 2001-07-31 |
EP1105936A1 (en) | 2001-06-13 |
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