EP3188312A1 - Antennensystem - Google Patents

Antennensystem Download PDF

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Publication number
EP3188312A1
EP3188312A1 EP16207008.0A EP16207008A EP3188312A1 EP 3188312 A1 EP3188312 A1 EP 3188312A1 EP 16207008 A EP16207008 A EP 16207008A EP 3188312 A1 EP3188312 A1 EP 3188312A1
Authority
EP
European Patent Office
Prior art keywords
reflector
antennas
antenna system
linear array
source
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.)
Granted
Application number
EP16207008.0A
Other languages
English (en)
French (fr)
Other versions
EP3188312B1 (de
Inventor
Friedman Tchoffo Talom
Bertrand BOIN
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.)
Thales SA
Original Assignee
Thales SA
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Publication date
Application filed by Thales SA filed Critical Thales SA
Publication of EP3188312A1 publication Critical patent/EP3188312A1/de
Application granted granted Critical
Publication of EP3188312B1 publication Critical patent/EP3188312B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01Q19/12—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
    • H01Q19/175—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 arrayed along the focal line of a cylindrical focusing surface
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
    • H01Q25/007—Antennas or antenna systems providing at least two radiating patterns using two or more primary active elements in the focal region of a focusing device

Definitions

  • the present invention relates to an antennal system.
  • low-profile antenna systems having heights of less than 20 centimeters.
  • a conventional parabola with symmetrical structuring is usable.
  • symmetrical structuring is meant a structure with symmetry of revolution. This allows for optimal performance in terms of gain and chart.
  • the diagram presented by the antenna in this plane is the diagram of a parabola having a small diameter. Such a diagram does not comply with the normalization constraints relating to the radiation pattern.
  • the invention proposes an antenna system comprising a source capable of emitting at least one beam, the source comprising at least one linear array of antennas, each linear array being capable of emitting a beam.
  • the antenna system comprises a reflector in the form of a parabolic cylinder, the reflector being arranged to reflect at least one beam.
  • the figure 1 illustrates a first embodiment of an antenna system 10.
  • the antenna system 10 is able to receive and transmit data in the communication frame, in particular by satellites.
  • the antenna system 10 is intended to be installed, for example, on ground or airborne platforms.
  • the antenna system 10 comprises a source 12, a reflector 14 and an arm 16.
  • the source 12 comprises a transceiver surface 18 and antennas 20.
  • the transceiver surface 18 is planar.
  • the transceiver surface 18 is adapted to receive the antennas 20.
  • the transmitting-receiving surface 18 has a rectangular shape having a length and a width.
  • the longitudinal direction is symbolized by an X axis on the figure 1 .
  • first transverse direction corresponding to the width of the rectangular shape.
  • the first transverse direction is symbolized by a Y axis on the figure 1 .
  • a second transverse direction is also defined as being perpendicular to the longitudinal direction X and to the first transverse direction Y.
  • the second transverse direction is symbolized by a Z axis on the figure 1 .
  • the antennas 20 are arranged along two parallel lines L1 and L2.
  • lines L1 and L2 are in the longitudinal direction X.
  • the antennas 20 have a rectangular type of shape.
  • Each line L1 and L2 comprises four antennas 20 according to the example of the figure 1 .
  • the number of antennas 20 of each line L1 or L2 is, for example, a multiple of two, such as eight or sixteen, while respecting the "low profile" character.
  • the antennas 20 of each line L1 or L2 are interconnected so as to form a linear array of antennas 22.
  • the antennas 20 of the first line L1 form a first linear array of antennas 22A while the antennas 20 of the first line L2 form a second linear array of antennas 22B.
  • Each linear array 22A and 22B is oriented in the longitudinal direction X.
  • Each linear array of antennas 22A and 22B is adapted to emit a beam belonging to a first frequency band and to receive a beam belonging to a second frequency band, the second frequency band being distinct from the first frequency band.
  • the frequency bands are selected from the group consisting of Ka, Ku and X bands.
  • the Ka-band corresponds to transmissions at frequencies between 29 GHz and 31 GHz and, in reception, at frequencies between 19.2 GHz and 21.2 GHz.
  • the Ku band corresponds to the part of the electromagnetic spectrum defined by the frequency band from 10 GHz to 15 GHz for satellite communications.
  • the X band corresponds to the part of the electromagnetic spectrum defined by a frequency band located around 8 GHz also for satellite communications.
  • each antenna array 22A and 22B comprises a plurality of elementary antennas and an antenna processing electronics.
  • the elementary antennas are sized for the band or bands on which the antenna array 22A and 22B is adapted to transmit or receive.
  • the elementary antennas are all identical.
  • the linear antenna arrays 22A and 22B confer on the source 12 the property of being dual-band in that the source 12 makes it possible to provide the transmission and reception functions.
  • the source 12 is able to operate on the Ka / Ku band.
  • the source 12 is able to operate on the Ka / X band.
  • the reflector 14 is arranged to reflect each of the beams emitted by the two linear arrays of antennas 22A and 22B.
  • the reflector 14 has the shape of a parabolic cylinder.
  • a parabolic cylinder is a cylinder portion whose base shape is a parabola portion.
  • a parabola is a plane curve, each point of which is equidistant from a fixed point, called the focus, and from a fixed line, called the directrix.
  • the shape of the reflector 14 makes it possible to define two faces, a concave face and a convex face.
  • the face adapted to reflect each of the beams emitted by the two linear antenna arrays 22A and 22B is the concave face.
  • the shape of the reflector 14 makes it possible to define a focal distance for the reflector 14.
  • the focal length of the reflector 14 is between 10 centimeters and 20 centimeters.
  • the focal length of the reflector 14 is equal to 15 centimeters.
  • the direction in which the intersection of any plane perpendicular to the direction with the parabolic cylinder is a parabola is called the first direction D1.
  • a median plane P is defined for the reflector 14.
  • the median plane P is the plane containing the first direction D1 and the director of the reflector 14.
  • the direction perpendicular to the median plane P is called second direction D2.
  • the reflector 14 is delimited by four planes, two planes in the first direction D1 and two planes in the second direction D2.
  • the reflector 14 thus extends in the first direction D1 between a lower side 24 and an upper side 26.
  • the reflector 14 also extends along the second direction D2 between a first end 28 and a second end 30.
  • any point located in the median plane P is located equidistant from the two ends 28 and 30.
  • any plane perpendicular to the median plane P is a plane whose intersection, when it exists, with the reflector 14 is a parabola.
  • the angle between the first direction D1 and the longitudinal direction X is less than or equal to 10 ° as a function of the orientation of the antennas 20.
  • the first direction D1 is parallel to the longitudinal direction X.
  • first direction D1 and the longitudinal direction X are parallel while the second direction D2 and the second longitudinal direction Z are parallel.
  • each linear array of antennas 22A and 22B is symmetrical to each other with respect to the median plane P.
  • each linear array of antennas 22A, 22B is equidistant from the two ends 28 and 30 of the reflector 14.
  • the reflector 14 is, for example, made of a reflective material that may be aluminum, carbon or metallized plastic to reduce its mass.
  • the reflector 14 has a first dimension H in the first direction D1.
  • the first dimension H corresponds to the distance measured along the first direction D1 between the lower side 24 and the upper side 26.
  • the first dimension H is between 10 centimeters and 20 centimeters.
  • the first dimension H is equal to 15 centimeters.
  • the first dimension H is equal to the length of the transceiver surface 18.
  • the reflector 14 has a second dimension E in the second direction D2.
  • the second dimension H corresponds to the distance measured along the second direction D2 between the two ends 28 and 30.
  • the second dimension E is between 30 centimeters and 50 centimeters.
  • the second dimension E is equal to 40 centimeters.
  • the arm 16 connects the source 12 to the reflector 14.
  • the connecting member 16 is in the form of a bar extending along the first transverse direction Y.
  • the arm 16 is connected to the reflector 14 by a pivot connection connected to the lower side 24 of the reflector 14.
  • the arm 16 is articulated around the longitudinal direction X.
  • the arm 16 has a length such that the distance between the reflector 14 and the source 12 is between 10 centimeters and 30 centimeters.
  • the distance between the source 12 and the reflector 14 measured in the first transverse direction Y is equal to 20 centimeters.
  • the arm 16 is, for example, made of a material identical to the material forming the transmitting-receiving surface 18.
  • the source 12 In transmission, the source 12 emits a beam belonging to a first frequency band towards the reflector 14.
  • the beam is then reflected by the reflector 14.
  • the reflector 14 reflects the beam to the source 12 whose antennas 20 receive the beam.
  • the operations in transmission and reception are, for example, implemented simultaneously.
  • the proposed antennal system 10 provides dual-band operation.
  • the antenna system 10 is compact in particular since the first dimension H is less than 30 centimeters.
  • the antenna system 10 has good performance in terms of radiation and diagram.
  • the antennal system 10 makes it easy to integrate a bipolarization operation in the design of linear antenna arrays 22A and 22B.
  • the antenna system 10 also has a large coverage capacity in terms of operating band.
  • the antenna system 10 has a low manufacturing cost.
  • an architecture comprising linear antenna arrays 22A and 22B integrating transmission and reception duplexing while being associated with a reflector 14 of a particular shape is easily achievable.
  • the antennal system 10 has an architecture adapted to multiple uses.
  • a second embodiment is illustrated by the figure 3 .
  • the reflector 14 of the second embodiment differs from the reflector of the first embodiment in that the reflector 14 of the figure 3 comprises a primary reflector 32 and a secondary reflector 34.
  • the median plane P is defined for the reflector 14 of the figure 3 relative to the primary reflector 32.
  • the secondary reflector 34 has a shape identical to the primary reflector 36.
  • the secondary reflector 34 has dimensions that are smaller than the dimensions of the primary reflector 32.
  • the secondary reflector 34 has a second dimension of the same order as the height of the antennas 20 and a first dimension at most equal to 15% that of the parabolic reflector in order to minimize the blockages of the radiation.
  • the primary reflector 32 and the secondary reflector 34 are positioned in a Cassegrain configuration.
  • the primary reflector 32 and the secondary reflector 34 are positioned so that their generatrices are all parallel to each other and so that their respective concave faces C, C 'are located vis-a-vis. More specifically, the directions of the primary reflector 32 and the secondary reflector 34 are combined.
  • the primary reflector 32 and the secondary reflector 34 are located at a distance of between 15 centimeters and 25 centimeters.
  • the source 12 is positioned between the primary reflector 32 and the secondary reflector 34, for example at a distance less than 10 centimeters from the primary reflector 32.
  • the source 12 In transmission, the source 12 emits a beam belonging to a first frequency band towards the secondary reflector 34.
  • the beam is then reflected to the primary reflector 32 which then reflects the incident beam.
  • a beam belonging to a second incident frequency band arrives on the primary reflector 32.
  • the primary reflector 32 reflects the beam towards the secondary reflector 34 which reflects the beam towards the source 12 whose antennas 20 receive the beam.
  • the figure 4 illustrates a third embodiment of the antenna system 10.
  • the source 12 differs from the source of the first embodiment in that the source 12 has two sources 40A and 40B according to the source 12 of the first embodiment.
  • each source 40A, 40B is positioned facing a respective end 28, 30 of the reflector 14 so that at least one linear array of antennas 22A and 22B is positioned opposite one end 28 and 30.
  • the figure 5 illustrates a fourth embodiment of the antennal structure.
  • the reflector 14 comprises a primary reflector 32 and two secondary reflectors 34A and 34B adapted to reflect the beam towards the primary reflector 32, each of the primary reflectors 32 and secondary 34A and 34B having the shape of a parabolic cylinder.
  • each secondary reflector 34A and 34B is symmetrical with respect to the median plane P and each secondary reflector 34A and 34B is positioned facing a respective end 28 and 30 of the primary reflector 32.
  • the antenna structure 10 comprises a source 12 capable of emitting at least one beam, the source 12 comprising at least one linear array of antennas 22A and 22B 20B, each linear array 22A and 22B being adapted to beam, the antenna structure 10 having a reflector 14 in the form of a parabolic cylinder, the reflector 14 being arranged to reflect the at least one beam.
  • Such a configuration makes it possible to have an antenna system 10 having a reduced space requirement in height with good performances in terms of gain and of diagram.
  • the source 12 has more than two transmission-reception surfaces 18 and a larger number of linear antenna arrays.

Landscapes

  • Aerials With Secondary Devices (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
EP16207008.0A 2015-12-28 2016-12-27 Antennensystem Active EP3188312B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1502701A FR3046301B1 (fr) 2015-12-28 2015-12-28 Systeme antennaire

Publications (2)

Publication Number Publication Date
EP3188312A1 true EP3188312A1 (de) 2017-07-05
EP3188312B1 EP3188312B1 (de) 2022-11-30

Family

ID=55862837

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16207008.0A Active EP3188312B1 (de) 2015-12-28 2016-12-27 Antennensystem

Country Status (3)

Country Link
EP (1) EP3188312B1 (de)
ES (1) ES2939371T3 (de)
FR (1) FR3046301B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107482322A (zh) * 2017-07-26 2017-12-15 西安电子科技大学 一种基于张拉结构的可展开抛物柱面天线
EP4068517A1 (de) * 2021-03-30 2022-10-05 Nokia Solutions and Networks Oy Antennenvorrichtung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2471284A (en) * 1945-05-25 1949-05-24 Bell Telephone Labor Inc Directive antenna system
US3267472A (en) * 1960-07-20 1966-08-16 Litton Systems Inc Variable aperture antenna system
JPS61157105A (ja) * 1984-12-28 1986-07-16 Dx Antenna Co Ltd アンテナ装置
WO2009025458A1 (en) * 2007-08-21 2009-02-26 Electronics And Telecommunications Research Institute Reconfigurable hybrid antenna device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3448517B2 (ja) * 1998-07-02 2003-09-22 株式会社豊田中央研究所 アンテナ装置
JP5450106B2 (ja) * 2007-03-16 2014-03-26 モバイル サット リミテッド 車載アンテナおよび信号を送受信するための方法
WO2011034937A1 (en) * 2009-09-15 2011-03-24 Ems Technologies, Inc. Mechanically steered reflector antenna
WO2013028099A1 (ru) * 2011-12-29 2013-02-28 Квантрилл Эстейт Инк Универсальное устройство для концентрации энергии

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2471284A (en) * 1945-05-25 1949-05-24 Bell Telephone Labor Inc Directive antenna system
US3267472A (en) * 1960-07-20 1966-08-16 Litton Systems Inc Variable aperture antenna system
JPS61157105A (ja) * 1984-12-28 1986-07-16 Dx Antenna Co Ltd アンテナ装置
WO2009025458A1 (en) * 2007-08-21 2009-02-26 Electronics And Telecommunications Research Institute Reconfigurable hybrid antenna device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107482322A (zh) * 2017-07-26 2017-12-15 西安电子科技大学 一种基于张拉结构的可展开抛物柱面天线
CN107482322B (zh) * 2017-07-26 2020-03-17 西安电子科技大学 一种基于张拉结构的可展开抛物柱面天线
EP4068517A1 (de) * 2021-03-30 2022-10-05 Nokia Solutions and Networks Oy Antennenvorrichtung

Also Published As

Publication number Publication date
ES2939371T3 (es) 2023-04-21
EP3188312B1 (de) 2022-11-30
FR3046301B1 (fr) 2019-05-31
FR3046301A1 (fr) 2017-06-30

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