US3898667A - Compact frequency reuse antenna - Google Patents

Compact frequency reuse antenna Download PDF

Info

Publication number
US3898667A
US3898667A US439871A US43987174A US3898667A US 3898667 A US3898667 A US 3898667A US 439871 A US439871 A US 439871A US 43987174 A US43987174 A US 43987174A US 3898667 A US3898667 A US 3898667A
Authority
US
United States
Prior art keywords
reflector
reflectors
waves
elements
parallel
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 - Lifetime
Application number
US439871A
Other languages
English (en)
Inventor
Anthony Rowland Raab
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RCA Corp
Original Assignee
RCA Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by RCA Corp filed Critical RCA Corp
Priority to US439871A priority Critical patent/US3898667A/en
Priority to IT19295/75A priority patent/IT1028386B/it
Priority to DE2502531A priority patent/DE2502531C3/de
Priority to CA218,547A priority patent/CA1039842A/fr
Priority to GB3956/75A priority patent/GB1484102A/en
Priority to BE153092A priority patent/BE825218A/fr
Priority to NL7501367A priority patent/NL7501367A/xx
Priority to FR7503741A priority patent/FR2260197B1/fr
Priority to JP1614775A priority patent/JPS5729882B2/ja
Application granted granted Critical
Publication of US3898667A publication Critical patent/US3898667A/en
Priority to JP55157555A priority patent/JPS5816801B2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • 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
    • H01Q19/17—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 comprising two or more radiating elements
    • 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

Definitions

  • Each reflector has an associated feed copolarized with the reflecting elements of the particular reflector.
  • the two reflectors are overlaid without coinciding their respective focus points so that cross-polarized fields generated by the parallel elements in the surface of each reflector from its associated feed are scattered away from the copolarized beam of each reflector.
  • This invention relates to a compact frequency reuse antenna system and more particularly to an antenna system which achieves frequency reuse by orthogonally polarized sources and reflectors.
  • a compact frequency reuse antenna system for communicating electromagnetic waves of the same frequency with a given orthogonal polarization separation is achieved by two reflectors having a given contour and resultant focus points.
  • Each of the reflectors comprises parallel reflecting elements, with the elements of one reflector oriented in a first direction to reflect waves polarized in a first direction and with the elements of the other reflector oriented in an orthogonal direction to reflect waves polarized in an orthogonal direction.
  • a first antenna feed is located at the focus of the first reflector for communicating electromagnetic waves copolarized with the elements of the first reflector
  • a second antenna feed is located at the focus of the second reflector for communicating electromagnetic waves copolarized with the elements of the second reflector.
  • the reflectors are mounted in an overlapping manner with the focus points of the reflectors sufficiently separated so that cross-polarized fields generated by the parallel elements at the surface of the respective reflectors are scattered away from the copolarized beam of each reflector.
  • FIG. 1 is a front elevation drawing of a satellite an tenna system mounted to the satellite according to one embodiment of the present invention.
  • FIG. 2 is a side elevation view of the arrangement shown in FIG. 1 as taken along line 22.
  • FIG. 3 is a front view of a paraboloid of revolution illustrating the portion of the paraboloid of revolution used in the antenna system of FIG. 1.
  • FIG. 4 is a front elevation drawing illustrating a general placement of two of the reflectors in FIG. 1 relative to each other.
  • FIG. 5 is a sketch illustrating the operation of a first pair of reflectors in the antenna system shown in FIG. 1.
  • FIG. 6 is a sketch illustrating a portion of a few of the vertical elements in one reflector and a vector diagram of the copolarized wave applied to these elements.
  • FIG. 7 is a sketch illustrating a portion ofa few ofthe horizontal elements in one reflector and a vector diagram of the copolarized wave applied to these elements.
  • FIG. 8 is a sketch illustrating the operation of another pair of overlapping reflectors and associated feeds in the antenna system shown in FIG. 1.
  • a satellite antenna system 10 is shown mounted to satellite structure 11.
  • the antenna system 10 includes reflectors 12, 13, 15 and 17 and waveguide feed horns 19a, 19b, 19c and 19d.
  • the reflectors 12, 13, 15 and 17 are mounted to satellite structure 11 by, the support posts 12a, 13a, 13b, 15a, 17a and 17!).
  • Support posts 1312 and 17b are hidden from view by horns 19b and 19d in FIG. 1.
  • reflector 15 is supported by post 15a extending through reflector 15 and by fixing the end 16 of reflector 15 to one end of posts 17a and 17b.
  • the reflector 15 is fixed to the posts 15a, 17a and 17b by suitable bonding.
  • the reflector 17 is supported by the two posts 17a and 17b extending through the reflector l7 and by fixing the end 16a to posts 1511 at a point just slightly rearward of the reflector 15.
  • the reflector 17 is fixed to the posts 15a, I and 17b by suitable bonding.
  • Posts 12a, 13a and 13b similarly mount reflector 12 forward of reflector 13 and mount reflector l3 rearward of reflector 12.
  • One suitable material for such support posts in space is a low thermal expansion material known as GFEC which letters stand for graphite fiber epoxy composite.
  • the reflectors l2, 13, 15 and 17 are each portions of a paraboloid of revolution.
  • the portion 21 of the paraboloid of revolution illustrated in FIG. 3 is used for reflector 15.
  • the portion 21a is used for reflector 17.
  • the reflectors l2 and 13 use similar but symmetrical portions of a paraboloid of revolution as shown by dashed lines.
  • the long edge of each of the portions intersects the vertex of the paraboloid.
  • the portion 21 overlaps over half of portion 21a.
  • the vertex V is along the long edge of the portions 21 and 21a.
  • the vertex V is midway along the long edge of portion 21a and about one third up from the end of portion 21.
  • the portion selected is near the center of the paraboloid of revolution to permit more closely spaced overlapping of the reflectors and to minimize excitation of cross-polarized fields.
  • the reflectors l2 and 13 overlap each other and the reflectors l5 and 17 overlap each other.
  • the reflector 12 overlaps about one half of reflector 13.
  • reflector l5 overlaps about one half of reflector 17.
  • the reflectors are overlapped so that the long edge of thenferwg rd reflector overlaps the long edge of the associated rearward reflector.
  • reflector 15 overlaps reflector 17 with the long edge overlapped.
  • the vertex point 23 for reflector 15 as shown in FIG. 4 is aligned and spaced from the vertex point 25 of reflector 17.
  • the reflectors I5 and 17 overlap at their more flat ends near the vertex of each with essentially even symmetry. In other words. if one were to place a mirror at the middle of the overlap and cover the upper half. the mirror would reflect from the lower half what would substantially be at the covered upper half. The same is true with respect to the placement of reflectors l2 and 13, with reflector 12 forward or extending further away from structure 11 than reflector 13.
  • the vertex point 23a for reflector 12 is aligned and spaced from the vertex point 250 of reflector 13.
  • the reflectors 12, 13, 15 and 17 are formed of parallel conductive elements as represented in part by the parallel lines in FIGS. 1 and 4.
  • the parallel elements of reflectors 12 and 17 are represented by vertically oriented parallel lines 27 and 29, respectively.
  • the parallel elements of reflectors 13 and 15 are represented by the horizontally oriented parallel lines 31 and 33, respectively.
  • the elements that make up the reflectors 13 and 15 are oriented orthogonal to the elements that make up the reflectors l2 and 17.
  • the parallel elements forming the reflectors may be provided by a plurality of closely spaced parallel wires embedded in a low dielectric plastic base. The wires are laid in such a manner that viewed from a great distance along the axis of the generating paraboloid they appear everywhere parallel to themselves and to an electric field generated by an associated copolarized feed.
  • the feed horn 19a is designed to couple signals over a given wide frequency band and is polarized to communicate vertically polarized waves.
  • This feed horn 19a is mounted by support 51 extending from satellite structure 11 to the horn 19a as shown in FIG. 1.
  • the feed horn 19a is positioned with the aperture of the horn 19a at the focus point of the copolarized reflector 12.
  • the feed horn 19a is further oriented to optimize the illumination of reflector 12.
  • the feed horn 19b is designed to couple signals over the same frequency band as feed horn 19a but is polarized to communicate horizontally polarized waves.
  • This feed horn 19b is mounted by support 53 extending from satellite structure 11 to the horn 19b to position the aperture of the horn 1912 at the focus point of copolarized reflector 13.
  • the feed horn 19b is further oriented to optimize the illumination of reflector 13.
  • the feed horns 19c and 19d are polarized to communicate horizontally and vertically polarized waves, respectively.
  • the horns 19c and 19d are designed to couple signals over the same frequency band. This frequency band may be the same as the given frequency band or may be another frequency band.
  • horns 19a, 19b, 19c and 19d are designed to communicate signals over the same frequency band.
  • the sub-frequency bands or channels within this wide frequency band communicated by horns 19a and 19b in this preferred arrangement differ from that communicated by horns 19c and 19d.
  • the horns 19a and 19b communicate the odd numbered channels for example and horns 19c and 19d communicate the even numbered channels. This minimizes the problems associated with multiplexing these signals.
  • FIG. 2 illustrates more clearly how the supports 55 and 57 are mounted between the horns 19c and 19d and structure 11.
  • the feed horns 19a, 19b, 19c and 19d are coupled to the transmitter and receiver circuitry located within the structure 11 by waveguides such as waveguides 59 and 61 illustrated in FIG. 2 extending between feed horns 191' and 19d. respectively. and structure 11.
  • the feed horns 19c and 19d are further oriented to optimize illumination of reflectors 15 and 17, respectively.
  • the vertically oriented elements of reflectors 12 and 17 pass horizontally polarized waves and reflect the vertically polarized waves.
  • the horizontally oriented elements of reflectors l3 and 15 pass vertically polarized waves and reflect the horizontally polarized waves. In the overlapping region 18 and 20 in FIG. 1, both horizontally and vertically polarized waves are reflected.
  • operation of the antenna system is considered in the case of transmitted vertically polarized waves toward reflector 12.
  • These waves radiated toward the reflector 12 by horn 19a located at the focusf of reflector 12, are represented in FIG. 5 by dashed lines 26.
  • the waves are intercepted by reflector 12 having vertical elements and are directed in phase to the antenna aperture (collimated) whereupon a radiated beam in a given direction of arrow 28 is provided.
  • the vertex 23a of the reflector 12 is along one edge 12d of reflector 12 as shown in FIG. 1.
  • the horn 19a Since the horn 19a is located at the focus of reflector l2 and in line and forward of the vertex 23a, the horn 19a provides low blockage of the vertically polarized waves. The reciprocal operation takes place with respect to the received in phase waves at the antenna aperture. These in phase waves at the aperture are reflected to horn 19a.
  • these waves represented by dashed lines 36 in FIG. 5 are intercepted by horizontally polarized reflector 13 and are directed in phase at the antenna aperture (collimated) whereupon in the illustrated example a radiated beam in the same given direction of arrow 28 is provided. Since the vertex 25 a of the reflector 13 is along one edge of reflector 13 and the horn 19b is at the focus f in line with the vertex, the horn 19b provides low blockage of the horizontally polarized waves.
  • the vertically polarized waves represented by dashed lines 26 passing through the reflector 12 at the common region 18 generate a cross (horizontally) polarized field 26h at the reflelctor 12 which field passes on to reflector 13 whereupon they are reflected. See FIG. 5.
  • a cross (horizontally) polarized field 26h at the reflelctor 12 which field passes on to reflector 13 whereupon they are reflected. See FIG. 5.
  • some degree of cross (horizontally) polarized field is generated by reflector 12 when intercepting the vertically polarized waves. This may be explained in part by a slight misalignment of the parallel elements relative to the polarization of the waves near the edge 22 furthest from the long edge 12d intersecting the vertex 23a.
  • FIG. 6 is an enlarged view of a portion of a few elements 27 represented by lines located near edge 22 of reflector 12 and an exaggerated vector diagram of the copolarized wave 27a applied to these elements and the associated vector components.
  • the misalignment of wave vector 27a relative to the lines 27 is greatly exaggerated for purposes of illustration.
  • This misalignment of the applied field is due in part to a polarization change in the incident wave as the wave makes a greater angle with respect to the focal axis (increases as the wave is offthe focal axis).
  • the result is that with an applied field to these reflectors a cross (horizontal) field is produced. This is represented in FIG. 5 by dashed lines 26h.
  • the reflectors l2 and 13 are overlapped near the vertex of each to lessen this misalignment effect at the overlapped region and therefore minimize this effect.
  • D displacing the focal points f and f of the two reflectors l2 and 13 a sufficient distance D, as
  • the cross-polarized field 2611 at the horizontally polarized reflector 13 (associated with the generated cross-polarized field 2611) is squinted away from the beam direction 28 associated with the vertically polarized reflector and at the same time is partially de-collimated.
  • this cross-polarized field 36v at reflector 13 is squinted away from the main horizontally polarized beam in the direction 28.
  • these cross (vertical) polarized waves are squinted away at reflector 13 from either of the horns 19a or 19b.
  • the feed horn 190 is located at the focusf of the reflector l5 and the feed horn 19d is located at the focusf, of reflector 17. Since the vertex is along one edge of each of the reflectors low blockage of the received or reflected waves occurs.
  • the vertically oriented waves 56 from horn 19:! passing through the common region 20 shown in FIG. 1 pass through the reflector 15 to reflector l7 whereupon they are reflected.
  • some degree of cross (horizontally) polarized waves indicated by dashed lines 56h are excited and they are squinted away as discussed previously due to the sufficient separation D of the focus points f and f, of the two reflectors l5 and 17.
  • horizontally polarized waves 46 passing through the reflector 15 at the common region 20 they generate cross (vertically) polarized fields 46v which are passed on to reflector 17.
  • these cross-polarized fields are squinted away due to the sufficient separation of the focus points f and f of the two reflectors.
  • the reciprocity theory of antennas applies in the operation of the antenna structure described herein. Therefore whatever happens in the transmission mode described previously applies in reverse in the reception mode.
  • a compact antenna arrangement for communicating electromagnetic waves with a first and second polarization separated by from one another comprising:
  • each of said reflectors comprising a portion of a parapoloid and having a resultant vertex, focus point and a focal axis
  • each of said reflectors having a plurality of parallel electromagnetic wave reflecting elements providing reflection of waves, the elements of one reflector being perpendicular to the elements of the other reflector,
  • a first feed means located at the focus point of said first reflector and adapted to communicate electromagnetic waves polarized parallel to the reflecting elements of said first reflector to produce a copolarized beam in a first direction
  • a second feed means located at the focus point of said second reflector and adapted to communicate electromagnetic waves parallel to the reflecting elements of said second reflector to produce a copolarized beam in a second direction
  • An arrangement for communicating electromagnetic waves with a first and second polarization separated by 90 from one another comprising:
  • each of said reflectors being portions of a parabola of revolution with the vertex being along the long edge of each of the reflectors and having a resultant focus point
  • each of said reflectors having a plurality of parallel electromagnetic wave reflecting elements providing reflection of waves, the elements of one reflector being perpendicular to the elements of the other reflector,
  • a first feed means located at the focus ofsaid first reflector and adapted to communicate electromagnetic waves polarized parallel to the reflecting elements of said first reflector to produce a copola rized beam in a first direction
  • a second feed means located at the focus of said second reflector and adapted to communicate electromagnetic waves parallel to the reflecting elements of said second reflector to produce a copolarized beam in a second direction

Landscapes

  • Aerials With Secondary Devices (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
US439871A 1974-02-06 1974-02-06 Compact frequency reuse antenna Expired - Lifetime US3898667A (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
US439871A US3898667A (en) 1974-02-06 1974-02-06 Compact frequency reuse antenna
IT19295/75A IT1028386B (it) 1974-02-06 1975-01-15 Antenna di tipo compatto a riuti lizzo dello spettro di frequenza
DE2502531A DE2502531C3 (de) 1974-02-06 1975-01-22 Reflektorantennen-Anordnung für zwei senkrecht zueinander polarisierte elektromagnetische Wellen
CA218,547A CA1039842A (fr) 1974-02-06 1975-01-23 Antenne compacte a reutilisation de frequence
GB3956/75A GB1484102A (en) 1974-02-06 1975-01-29 Compact frequency reuse antenna
BE153092A BE825218A (fr) 1974-02-06 1975-02-05 Combinaison d'antennes a reutilisation de frequence
NL7501367A NL7501367A (nl) 1974-02-06 1975-02-05 Compact antennestelsel.
FR7503741A FR2260197B1 (fr) 1974-02-06 1975-02-06
JP1614775A JPS5729882B2 (fr) 1974-02-06 1975-02-06
JP55157555A JPS5816801B2 (ja) 1974-02-06 1980-11-07 マイクロ波アンテナ装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US439871A US3898667A (en) 1974-02-06 1974-02-06 Compact frequency reuse antenna

Publications (1)

Publication Number Publication Date
US3898667A true US3898667A (en) 1975-08-05

Family

ID=23746476

Family Applications (1)

Application Number Title Priority Date Filing Date
US439871A Expired - Lifetime US3898667A (en) 1974-02-06 1974-02-06 Compact frequency reuse antenna

Country Status (9)

Country Link
US (1) US3898667A (fr)
JP (2) JPS5729882B2 (fr)
BE (1) BE825218A (fr)
CA (1) CA1039842A (fr)
DE (1) DE2502531C3 (fr)
FR (1) FR2260197B1 (fr)
GB (1) GB1484102A (fr)
IT (1) IT1028386B (fr)
NL (1) NL7501367A (fr)

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0080319A1 (fr) * 1981-11-19 1983-06-01 The Marconi Company Limited Combinaisons d'antennes
DE3329558A1 (de) * 1982-08-16 1984-02-16 RCA Corp., 10020 New York, N.Y. Antennenkonstruktion
DE3333951A1 (de) * 1982-09-22 1984-03-22 RCA Corp., 10020 New York, N.Y. Antennenhalterung
DE3536581A1 (de) * 1984-10-15 1986-04-24 Rca Corp., Princeton, N.J. Doppeltes gitter-antennenreflektorsystem und verfahren zu seiner herstellung
EP0186496A2 (fr) * 1984-12-26 1986-07-02 Sharp Kabushiki Kaisha Système d'antenne pour ondes à polarisation circulaire
US4647938A (en) * 1984-10-29 1987-03-03 Agence Spatiale Europeenne Double grid reflector antenna
DE3638461A1 (de) * 1985-11-12 1987-05-21 Rca Corp Antennensystem fuer mehrfachausnutzung des spektrums durch orthogonale polarisationen
US4757323A (en) * 1984-07-17 1988-07-12 Alcatel Thomson Espace Crossed polarization same-zone two-frequency antenna for telecommunications satellites
US4792813A (en) * 1986-08-14 1988-12-20 Hughes Aircraft Company Antenna system for hybrid communications satellite
US4823143A (en) * 1988-04-22 1989-04-18 Hughes Aircraft Company Intersecting shared aperture antenna reflectors
US4845510A (en) * 1987-08-10 1989-07-04 Hughes Aircraft Company Reflector surface adjustment structure
US4851858A (en) * 1984-01-26 1989-07-25 Messerschmitt-Boelkow-Blohm Gmbh Reflector antenna for operation in more than one frequency band
US5136294A (en) * 1987-01-12 1992-08-04 Nec Corporation Multibeam antenna
USRE34410E (en) * 1986-08-14 1993-10-19 Hughes Aircraft Company Antenna system for hybrid communication satellite
US5581265A (en) * 1992-02-01 1996-12-03 Matra Marconi Space Uk Limited Reflector antenna assembly for dual linear polarization
US5673056A (en) * 1992-09-21 1997-09-30 Hughes Electronics Identical surface shaped reflectors in semi-tandem arrangement
US5949370A (en) * 1997-11-07 1999-09-07 Space Systems/Loral, Inc. Positionable satellite antenna with reconfigurable beam
US5977926A (en) * 1998-09-10 1999-11-02 Trw Inc. Multi-focus reflector antenna
US6049312A (en) * 1998-02-11 2000-04-11 Space Systems/Loral, Inc. Antenna system with plural reflectors
US6137451A (en) * 1997-10-30 2000-10-24 Space Systems/Loral, Inc. Multiple beam by shaped reflector antenna
EP1059689A2 (fr) * 1999-06-09 2000-12-13 Hughes Electronics Corporation Système d'antenne à biréflecteur à grilles
EP1184939A2 (fr) * 2000-08-09 2002-03-06 The Boeing Company Antenne à réflecteur à grilles
WO2006110308A2 (fr) * 2005-03-28 2006-10-19 Radiolink Networks, Inc. Antennes duplex alignees a haute isolation
WO2019002702A1 (fr) * 2017-06-30 2019-01-03 Arianegroup Sas Système d'interface modulaire pour un réflecteur d'antenne, en particulier d'une antenne d'un engin spatial tel qu'un satellite notamment

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3898667A (en) * 1974-02-06 1975-08-05 Rca Corp Compact frequency reuse antenna
JPS5829205A (ja) * 1981-08-13 1983-02-21 Nippon Telegr & Teleph Corp <Ntt> マルチビ−ムアンテナ装置
JPS58205308A (ja) * 1982-05-25 1983-11-30 Nippon Telegr & Teleph Corp <Ntt> マルチビ−ムアンテナ装置
JPS58205307A (ja) * 1982-05-25 1983-11-30 Nippon Telegr & Teleph Corp <Ntt> マルチビ−ムアンテナ装置
DE3337049A1 (de) * 1983-10-12 1985-05-09 Gesellschaft für Schwerionenforschung mbH, 6100 Darmstadt Feststoff mit besonderen elektrischen eigenschaften und verfahren zur herstellung eines solchen feststoffes
JPS6168527A (ja) * 1984-09-12 1986-04-08 Omron Tateisi Electronics Co 発振形測温回路
JPS6168526A (ja) * 1984-09-12 1986-04-08 Omron Tateisi Electronics Co 発振形測温回路
DE3609084A1 (de) * 1985-07-26 1987-02-05 Messerschmitt Boelkow Blohm Reflektoranordnung
DE3609078A1 (de) * 1985-07-26 1987-02-05 Messerschmitt Boelkow Blohm Reflektoranordnung
JPS6246238A (ja) * 1985-08-23 1987-02-28 Omron Tateisi Electronics Co 生化学測定装置
JPS6256887A (ja) * 1985-09-05 1987-03-12 Zenkichi Kishimoto 温度計を具えた時計
DE3629315A1 (de) * 1986-08-28 1988-03-10 Messerschmitt Boelkow Blohm Reflektoranordnung fuer einen geostationaeren satelliten

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2991473A (en) * 1955-10-03 1961-07-04 Hollandse Signaalapparaten Bv Scanning antenna system for horizontally and vertically polarized waves
US3267472A (en) * 1960-07-20 1966-08-16 Litton Systems Inc Variable aperture antenna system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3096519A (en) * 1958-04-14 1963-07-02 Sperry Rand Corp Composite reflector for two independent orthogonally polarized beams
FR1214296A (fr) * 1958-10-29 1960-04-07 Thomson Houston Comp Francaise Nouvelle antenne pour ondes ultra-courtes
NL132576C (fr) * 1958-12-23
US3049708A (en) * 1959-11-20 1962-08-14 Sperry Rand Corp Polarization sensitive antenna system
US3898667A (en) * 1974-02-06 1975-08-05 Rca Corp Compact frequency reuse antenna

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2991473A (en) * 1955-10-03 1961-07-04 Hollandse Signaalapparaten Bv Scanning antenna system for horizontally and vertically polarized waves
US3267472A (en) * 1960-07-20 1966-08-16 Litton Systems Inc Variable aperture antenna system

Cited By (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0080319A1 (fr) * 1981-11-19 1983-06-01 The Marconi Company Limited Combinaisons d'antennes
DE3329558A1 (de) * 1982-08-16 1984-02-16 RCA Corp., 10020 New York, N.Y. Antennenkonstruktion
US4575726A (en) * 1982-08-16 1986-03-11 Rca Corporation Antenna construction including two superimposed polarized parabolic reflectors
DE3333951A1 (de) * 1982-09-22 1984-03-22 RCA Corp., 10020 New York, N.Y. Antennenhalterung
FR2533374A1 (fr) * 1982-09-22 1984-03-23 Rca Corp Dispositif de montage d'antenne
US4550319A (en) * 1982-09-22 1985-10-29 Rca Corporation Reflector antenna mounted in thermal distortion isolation
US4851858A (en) * 1984-01-26 1989-07-25 Messerschmitt-Boelkow-Blohm Gmbh Reflector antenna for operation in more than one frequency band
US4757323A (en) * 1984-07-17 1988-07-12 Alcatel Thomson Espace Crossed polarization same-zone two-frequency antenna for telecommunications satellites
DE3536581A1 (de) * 1984-10-15 1986-04-24 Rca Corp., Princeton, N.J. Doppeltes gitter-antennenreflektorsystem und verfahren zu seiner herstellung
US4625214A (en) * 1984-10-15 1986-11-25 Rca Corporation Dual gridded reflector structure
US4647938A (en) * 1984-10-29 1987-03-03 Agence Spatiale Europeenne Double grid reflector antenna
EP0186496A3 (en) * 1984-12-26 1987-08-19 Sharp Kabushiki Kaisha Antenna system for circularly polarized waves
EP0186496A2 (fr) * 1984-12-26 1986-07-02 Sharp Kabushiki Kaisha Système d'antenne pour ondes à polarisation circulaire
DE3638461A1 (de) * 1985-11-12 1987-05-21 Rca Corp Antennensystem fuer mehrfachausnutzung des spektrums durch orthogonale polarisationen
USRE34410E (en) * 1986-08-14 1993-10-19 Hughes Aircraft Company Antenna system for hybrid communication satellite
US4792813A (en) * 1986-08-14 1988-12-20 Hughes Aircraft Company Antenna system for hybrid communications satellite
US5136294A (en) * 1987-01-12 1992-08-04 Nec Corporation Multibeam antenna
US4845510A (en) * 1987-08-10 1989-07-04 Hughes Aircraft Company Reflector surface adjustment structure
US4823143A (en) * 1988-04-22 1989-04-18 Hughes Aircraft Company Intersecting shared aperture antenna reflectors
US5581265A (en) * 1992-02-01 1996-12-03 Matra Marconi Space Uk Limited Reflector antenna assembly for dual linear polarization
US5673056A (en) * 1992-09-21 1997-09-30 Hughes Electronics Identical surface shaped reflectors in semi-tandem arrangement
US6137451A (en) * 1997-10-30 2000-10-24 Space Systems/Loral, Inc. Multiple beam by shaped reflector antenna
US5949370A (en) * 1997-11-07 1999-09-07 Space Systems/Loral, Inc. Positionable satellite antenna with reconfigurable beam
US6049312A (en) * 1998-02-11 2000-04-11 Space Systems/Loral, Inc. Antenna system with plural reflectors
EP0986133A3 (fr) * 1998-09-10 2000-05-17 Trw Inc. Antenne à plusieurs orientations du réflecteur
US5977926A (en) * 1998-09-10 1999-11-02 Trw Inc. Multi-focus reflector antenna
EP0986133A2 (fr) * 1998-09-10 2000-03-15 Trw Inc. Antenne à plusieurs orientations du réflecteur
EP1059689A2 (fr) * 1999-06-09 2000-12-13 Hughes Electronics Corporation Système d'antenne à biréflecteur à grilles
EP1059689A3 (fr) * 1999-06-09 2002-07-17 Hughes Electronics Corporation Système d'antenne à biréflecteur à grilles
EP1184939A2 (fr) * 2000-08-09 2002-03-06 The Boeing Company Antenne à réflecteur à grilles
EP1184939A3 (fr) * 2000-08-09 2004-01-14 The Boeing Company Antenne à réflecteur à grilles
US20070057860A1 (en) * 2001-07-06 2007-03-15 Radiolink Networks, Inc. Aligned duplex antennae with high isolation
WO2006110308A2 (fr) * 2005-03-28 2006-10-19 Radiolink Networks, Inc. Antennes duplex alignees a haute isolation
WO2006110308A3 (fr) * 2005-03-28 2007-03-08 Radiolink Networks Inc Antennes duplex alignees a haute isolation
US7286096B2 (en) 2005-03-28 2007-10-23 Radiolink Networks, Inc. Aligned duplex antennae with high isolation
WO2019002702A1 (fr) * 2017-06-30 2019-01-03 Arianegroup Sas Système d'interface modulaire pour un réflecteur d'antenne, en particulier d'une antenne d'un engin spatial tel qu'un satellite notamment
FR3068522A1 (fr) * 2017-06-30 2019-01-04 Airbus Safran Launchers Sas Systeme d'interface modulaire pour un reflecteur d'antenne, en particulier d'une antenne d'un engin spatial tel qu'un satellite notamment.
US11189912B2 (en) 2017-06-30 2021-11-30 Arianegroup Sas Modular interface system for an antenna reflector, in particular for an antenna of a space craft, such as a satellite, in particular

Also Published As

Publication number Publication date
JPS50110751A (fr) 1975-09-01
FR2260197A1 (fr) 1975-08-29
DE2502531A1 (de) 1975-08-28
JPS5729882B2 (fr) 1982-06-25
DE2502531B2 (de) 1981-01-22
DE2502531C3 (de) 1981-10-15
IT1028386B (it) 1979-01-30
FR2260197B1 (fr) 1980-09-12
JPS5816801B2 (ja) 1983-04-02
NL7501367A (nl) 1975-08-08
CA1039842A (fr) 1978-10-03
GB1484102A (en) 1977-08-24
JPS5678204A (en) 1981-06-27
BE825218A (fr) 1975-05-29

Similar Documents

Publication Publication Date Title
US3898667A (en) Compact frequency reuse antenna
US3231892A (en) Antenna feed system simultaneously operable at two frequencies utilizing polarization independent frequency selective intermediate reflector
US4342036A (en) Multiple frequency band, multiple beam microwave antenna system
US2422184A (en) Directional microwave antenna
US5543809A (en) Reflectarray antenna for communication satellite frequency re-use applications
US3281850A (en) Double-feed antennas operating with waves of two frequencies of the same polarization
US3810185A (en) Dual polarized cylindrical reflector antenna system
US6025798A (en) Crossed polarization directional antenna system
US3821746A (en) Antenna system with distortion compensating reflectors
US3500419A (en) Dual frequency,dual polarized cassegrain antenna
US3340535A (en) Circular polarization cassegrain antenna
US4250508A (en) Scanning beam antenna arrangement
JPH0818326A (ja) アンテナ装置
US4260993A (en) Dual-band antenna with periscopic supply system
US3235870A (en) Double-reflector antenna with polarization-changing subreflector
US4063249A (en) Small broadband antenna having polarization sensitive reflector system
US4525719A (en) Dual-band antenna system of a beam waveguide type
US4823143A (en) Intersecting shared aperture antenna reflectors
US2870444A (en) Radiating systems
US4712111A (en) Antenna system
US4297710A (en) Parallel-plane antenna with rotation of polarization
GB1268341A (en) Improvements in parabolic antennas
US6225964B1 (en) Dual gridded reflector antenna system
US3852748A (en) High-resolution hemispherical reflector antenna
JPH10322111A (ja) パラボリックシリンダ型リフレクタアンテナ装置