EP0707357A1 - Antennensystem mit mehreren Speisesystemen, integriert in einem rauscharmen Umsetzer (LNC) - Google Patents

Antennensystem mit mehreren Speisesystemen, integriert in einem rauscharmen Umsetzer (LNC) Download PDF

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Publication number
EP0707357A1
EP0707357A1 EP95402265A EP95402265A EP0707357A1 EP 0707357 A1 EP0707357 A1 EP 0707357A1 EP 95402265 A EP95402265 A EP 95402265A EP 95402265 A EP95402265 A EP 95402265A EP 0707357 A1 EP0707357 A1 EP 0707357A1
Authority
EP
European Patent Office
Prior art keywords
antennas
satellites
frequency converter
lens
substrate
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
EP95402265A
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English (en)
French (fr)
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EP0707357B1 (de
Inventor
1-M. Ali Thomson Multimedia Louzir
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.)
Vantiva SA
Original Assignee
Wang Pierre
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Filing date
Publication date
Application filed by Wang Pierre filed Critical Wang Pierre
Publication of EP0707357A1 publication Critical patent/EP0707357A1/de
Application granted granted Critical
Publication of EP0707357B1 publication Critical patent/EP0707357B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/247—Supports; Mounting means by structural association with other equipment or articles with receiving set with frequency mixer, e.g. for direct satellite reception or Doppler radar
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/10—Resonant slot antennas
    • H01Q13/106—Microstrip slot antennas

Definitions

  • the invention relates to a reception device comprising a low noise frequency converter integrating several source antennas ("Feeds" in English terminology).
  • the invention is particularly applicable in the reception of signals transmitted by several satellites.
  • the reception of signals transmitted by geostationary satellites is conventionally done using a parabola which concentrates the received beam at its focal point.
  • a source antenna is then placed as a waveguide in an appropriate manner with respect to the parabola to couple the received signal to one or more probes which transmit it to a low noise frequency converter.
  • the latter performs the conversion of the signal to an intermediate frequency, the converted signal being able to be processed by satellite demodulator and / or the receiver decoder.
  • paraboloid reflectors whose role is to improve the convergence of beams coming from several more or less close satellites.
  • the reflectors are then designed so as to present a substantially parabolic surface to each beam.
  • the subject of the invention is a device for receiving signals transmitted by N (N> 1) satellites comprising means for focusing the beams corresponding to said signals characterized in that it comprises several source antennas, said antennas being printed source antennas produced on a single substrate.
  • the arrangement of said antennas on said substrate is determined by the location of the focal points of said beams.
  • the positioning of the antennas on the substrate is determined by the arrangement of the best available focal points for each beam.
  • it will suffice to correctly position these reception means with reference to a single satellite. Positioning for the other satellites is then performed automatically.
  • the focusing means comprise an electromagnetic lens, for example a Luneburg type lens (semi-sphere lens).
  • Such a lens makes it possible to obtain optimum convergence of all the beams, unlike a parabola which has only a true focal point.
  • the means for focusing the beams comprise a parabolic reflector.
  • a parabola can be considered sufficient to focus the different beams adequately.
  • the Luneburg type lens is more suitable.
  • the focusing means being a parabolic reflector
  • a first antenna is placed at the focal point of the reflector, the other antennas being placed on one side or the other with respect to the first antenna.
  • the antennas are slot antennas.
  • the antennas are annular slot antennas.
  • This antenna shape is particularly suitable for receiving orthogonally polarized waves having linear or circular polarizations.
  • said device comprises at least one frequency converter produced on the same substrate as said antennas.
  • the device comprises multiplexing means which multiplex the signals received by the antennas to a frequency converter.
  • said frequency converter is produced on the same substrate as the antennas.
  • Figure 1 explains the position of the optimal convergence points at the level of a parabolic reflector when the latter reflects the beams from two satellites angularly distant by an angle ⁇ .
  • a parabola 1 of diameter ⁇ has a focal point F1. It is assumed that the parabola is oriented so that, ideally, a satellite S1 is on the axis of the parabola and that the wave plane of this beam is perpendicular to this axis.
  • the reflected beam converges in F1, located on the axis of the parabola.
  • a second satellite S2 emits a second beam whose wave plane is inclined by the angle ⁇ relative to the axis of the parabola.
  • the optimum point of convergence is on a line inclined by the angle - ⁇ relative to the axis.
  • FIG. 2 explains the position of the focal points when using a Luneburg type lens.
  • the lens 2 has the shape of a sphere, which makes it possible to represent the object points and the corresponding image points on one side and the other of said sphere.
  • the practical implementation will use a half-sphere on a reflective plane.
  • the Luneburg lens has a radius R.
  • the focal points are located approximately 1.5xR from the center of the lens.
  • a focal point is located on the right parallel to the beam which illuminates the lens and passes through the center of it.
  • a Luneburg lens has its focal points at the surface of the lens.
  • An approximation used here makes it possible to move these focal points towards 1.5 times the radius. The separation between the focal points is thus improved.
  • Three satellites S3, S4, S5 are angularly distant from ⁇ 1 and ⁇ 2 respectively. These three satellites correspond respectively to focal points F3, F4 and F5. If we consider the angles ⁇ 1 and ⁇ 2 as small (less than 5 ° for example), the linear distances d34 and d45 separating respectively F3 from F4 and F4 from F5 are substantially equal to 1.5R ⁇ 1 and 1.5R ⁇ 2 in meters, where ⁇ 1 and ⁇ 2 are given in radians.
  • the linear distances are approximately 2.4 cm.
  • the distance between the focal points and the center of the lens is not to scale with respect to the radius R of this same lens.
  • FIG. 3 An exemplary embodiment of the device according to the invention is illustrated in FIG. 3.
  • the illustrated example relates to a device for receiving signals from three satellites, for example the satellites S3, S4 and S5 in FIG. 2.
  • L he skilled in the art will adapt the invention to other scenarios, such as that of FIG. 1.
  • the device comprises a dielectric substrate 17 which supports three antennas with annular slots 3a, 3b, 3c etched directly on the substrate. These antennas are excited by microstrip lines 4a to 4f in a manner described later. The centers of the slits are positioned on the substrate so that the distances which separate them are equal to the distances which separate the focal points F3, F4 and F5.
  • a radio frequency amplifier 11 amplifies one of the signals from the microstrip lines. This signal is transmitted to a mixer 12, receiving one of the frequencies F1 or F2 from appropriate oscillators. The signal at the output of the mixer is amplified by an amplifier for intermediate frequencies 13, before being transmitted, for example by coaxial cable (not illustrated) to an indoor unit (demodulator, decoder, TV receiver).
  • Figure 4 illustrates a section of Figure 3 through the center of the annular slot 3a. This figure illustrates a variant embodiment, certain elements of which are not shown in FIG. 3.
  • the side 5 of the dielectric substrate is covered with a metal layer in which a ring 6 is engraved.
  • the resonant modes of the slot are occur at frequencies for which the circumference of the slit is equal to an integer multiple of the guided wavelength.
  • the metal layer is connected to earth.
  • the substrate is oriented so as to present the annular slots to the reflector.
  • the side 7 of the substrate comprises the means for exciting the slot.
  • the microstrip line 4b is visible.
  • This microstrip line enters at a right angle into the enclosure formed by the annular slot 6, of a depth which is of the order of a quarter of the guided wavelength. Penetration at right angles corresponds to maximum coupling.
  • the dimensions of the microstrip lines are optimized so as to have a large bandwidth around the operating frequency. They have in particular a narrowing (not illustrated) before entering the enclosure formed by the annular slot.
  • a base 8 is arranged on the face 7 of the substrate.
  • the function of this base which is not illustrated in FIG. 3, is to allow obtaining a wave belly at the level of the annular slot.
  • the base is formed by a conductive cavity connected to the metal plane of the face 5 by means of a conductive line 9.
  • An orifice 10 allows the microstrip line 4b to penetrate inside the base 8 while being electrically isolated from it.
  • the depth H of the base is equal to approximately a quarter of the guided wavelength.
  • the thickness of the substrate and of the metal planes has been exaggerated in FIG. 4, so as to better bring out the characteristics described.
  • each annular slot is provided with two microstrip lines arranged at right angles, thus allowing the reception of waves linearly polarized horizontally and vertically.
  • Multiplexing means (represented schematically by switches 18 to 21 and by dotted lines indicating the possible connections) allow the selection of one of these signals for transmission to the amplifier 11.
  • These multiplexing means are, for example, blocking amplifiers whose passing or blocking state is controlled by a DC voltage.
  • a hybrid coupler is interposed between each annular slot and the multiplexing means.
  • the coupler 14 is illustrated in FIG. 5. This hybrid coupler is supplied via the two microstrip lines 4a and 4b. The length of each side of the coupler is about a quarter of the wavelength of the guided wave.
  • the ends of the two microstrip lines are curved inside the enclosure of the annular slot to avoid unwanted coupling between the guided components.
  • the total radiated field corresponds to the sum of these two fields.
  • the reflector used in conjunction with the invention is a paraboloid reflector intended to improve the focusing of the different beams.
  • the slot antennas can have other shapes than annular.

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Aerials With Secondary Devices (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Waveguide Switches, Polarizers, And Phase Shifters (AREA)
  • Waveguide Aerials (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
EP95402265A 1994-10-10 1995-10-09 Antennensystem mit mehreren Speisesystemen, integriert in einem rauscharmen Umsetzer (LNC) Expired - Lifetime EP0707357B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9412082A FR2725561B1 (fr) 1994-10-10 1994-10-10 Systeme a antennes sources multiples integrees au convertisseur de frequence a faible bruit
FR9412082 1994-10-10

Publications (2)

Publication Number Publication Date
EP0707357A1 true EP0707357A1 (de) 1996-04-17
EP0707357B1 EP0707357B1 (de) 2003-01-02

Family

ID=9467725

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95402265A Expired - Lifetime EP0707357B1 (de) 1994-10-10 1995-10-09 Antennensystem mit mehreren Speisesystemen, integriert in einem rauscharmen Umsetzer (LNC)

Country Status (6)

Country Link
US (1) US6798386B1 (de)
EP (1) EP0707357B1 (de)
JP (1) JPH08242119A (de)
CN (1) CN1127943A (de)
DE (1) DE69529261T2 (de)
FR (1) FR2725561B1 (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0818848A2 (de) * 1996-07-12 1998-01-14 Daimler-Benz Aktiengesellschaft Aktive Empfangsantenne
WO1998008270A1 (de) * 1996-08-18 1998-02-26 Pates Technology Patentverwertungsgesellschaft Für Satelliten- Und Moderne Informationstechnologien Mbh Multifocus-reflektorantenne
US5881254A (en) * 1996-06-28 1999-03-09 Lsi Logic Corporation Inter-bus bridge circuit with integrated memory port
EP0957535A1 (de) * 1998-05-15 1999-11-17 Société Européenne des Satellites Elektromagnetisch gekoppelte Mikrostreifenleiterantenne
EP0978898A1 (de) * 1998-08-04 2000-02-09 Agence Spatiale Europeenne Abtastende, asymmetrische Reflektorantenne mit bewegbarer Speisevorrichtung, insbesondere für den Empfang von mehreren Fernsehsatelliten und Betriebsverfahren dafür
WO2002007261A1 (fr) * 2000-07-13 2002-01-24 Thomson Licensing S.A. Antenne planaire multibandes
FR2828584A1 (fr) * 2001-08-10 2003-02-14 Thomson Licensing Sa Dispositif pour la reception et/ou l'emission de signaux a diversite de rayonnement
EP1329988A1 (de) * 1996-11-15 2003-07-23 Yagi Antenna Co., Ltd. Primärstrahler für Mehrstrahlantenne

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2833764B1 (fr) * 2001-12-19 2004-01-30 Thomson Licensing Sa Dispositif pour la reception et/ou l'emission de signaux electromagnetiques polarises circulairement
JP4013814B2 (ja) * 2003-04-07 2007-11-28 株式会社村田製作所 アンテナ構造およびそれを備えた通信機
FR2858468A1 (fr) * 2003-07-30 2005-02-04 Thomson Licensing Sa Antenne planaire a diversite de rayonnement
US6967619B2 (en) * 2004-01-08 2005-11-22 Kvh Industries, Inc. Low noise block
FR2866987A1 (fr) * 2004-03-01 2005-09-02 Thomson Licensing Sa Antenne planaire multibandes
US7109938B2 (en) * 2004-10-29 2006-09-19 Motorola, Inc. Tapered slot feed for an automotive radar antenna
DE502007003856D1 (de) * 2006-04-03 2010-07-01 Grieshaber Vega Kg Hohlleiterübergang zur erzeugung zirkulär polarisierter wellen
DE102006015338A1 (de) * 2006-04-03 2007-10-11 Vega Grieshaber Kg Hohlleiterübergang zur Erzeugung zirkular polarisierter Wellen
JP7113384B2 (ja) * 2017-07-06 2022-08-05 パナソニックＩｐマネジメント株式会社 アンテナおよび車両

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3605195A1 (de) * 1986-02-19 1987-08-20 Licentia Gmbh Antenne mit parabolreflektor
EP0516981A1 (de) * 1991-05-02 1992-12-09 Sumitomo Electric Industries, Limited Empfangsvorrichtung
US5202700A (en) * 1988-11-03 1993-04-13 Westinghouse Electric Corp. Array fed reflector antenna for transmitting & receiving multiple beams
GB2266190A (en) * 1992-04-09 1993-10-20 Brian William Ewan Dish level dual LNB to single cable source switch.
WO1994019842A1 (en) * 1993-02-28 1994-09-01 Thomson Consumer Electronics S.A. Antenna system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4195301A (en) * 1977-08-01 1980-03-25 Motorola, Inc. Disc antenna feed for parabolic reflector
CA1258707A (en) 1984-12-26 1989-08-22 Tomozo Ohta Antenna system
DE3644891A1 (de) * 1985-10-02 1991-11-07 British Aerospace Empfaenger fuer mikrowellen und millimeterwellen
US5402138A (en) * 1991-05-30 1995-03-28 Conifer Corporation Integrated MMDS/MDS antenna and dual band down converter
FR2719948B1 (fr) 1994-05-10 1996-07-19 Dassault Electronique Antenne multi-faisceaux pour la réception de micro-ondes émanant de plusieurs satellites.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3605195A1 (de) * 1986-02-19 1987-08-20 Licentia Gmbh Antenne mit parabolreflektor
US5202700A (en) * 1988-11-03 1993-04-13 Westinghouse Electric Corp. Array fed reflector antenna for transmitting & receiving multiple beams
EP0516981A1 (de) * 1991-05-02 1992-12-09 Sumitomo Electric Industries, Limited Empfangsvorrichtung
GB2266190A (en) * 1992-04-09 1993-10-20 Brian William Ewan Dish level dual LNB to single cable source switch.
WO1994019842A1 (en) * 1993-02-28 1994-09-01 Thomson Consumer Electronics S.A. Antenna system

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5881254A (en) * 1996-06-28 1999-03-09 Lsi Logic Corporation Inter-bus bridge circuit with integrated memory port
US5983306A (en) * 1996-06-28 1999-11-09 Lsi Logic Corporation PCI bridge with upstream memory prefetch and buffered memory write disable address ranges
EP0818848A2 (de) * 1996-07-12 1998-01-14 Daimler-Benz Aktiengesellschaft Aktive Empfangsantenne
EP0818848A3 (de) * 1996-07-12 2000-01-12 DaimlerChrysler AG Aktive Empfangsantenne
WO1998008270A1 (de) * 1996-08-18 1998-02-26 Pates Technology Patentverwertungsgesellschaft Für Satelliten- Und Moderne Informationstechnologien Mbh Multifocus-reflektorantenne
EP1329988A1 (de) * 1996-11-15 2003-07-23 Yagi Antenna Co., Ltd. Primärstrahler für Mehrstrahlantenne
US6864850B2 (en) 1996-11-15 2005-03-08 Yagi Antenna Co., Ltd. Multibeam antenna
EP1329987A1 (de) * 1996-11-15 2003-07-23 Yagi Antenna Co., Ltd. Mikrowellenwandler für Mehrstrahlantennen
EP0957535A1 (de) * 1998-05-15 1999-11-17 Société Européenne des Satellites Elektromagnetisch gekoppelte Mikrostreifenleiterantenne
FR2782193A1 (fr) * 1998-08-04 2000-02-11 Agence Spatiale Europeenne Antenne de reception a reflecteur excentre a balayage par la tete de reception,notamment pour la reception de plusieurs satellites de television et son procede de mise en oeuvre
EP0978898A1 (de) * 1998-08-04 2000-02-09 Agence Spatiale Europeenne Abtastende, asymmetrische Reflektorantenne mit bewegbarer Speisevorrichtung, insbesondere für den Empfang von mehreren Fernsehsatelliten und Betriebsverfahren dafür
WO2002007261A1 (fr) * 2000-07-13 2002-01-24 Thomson Licensing S.A. Antenne planaire multibandes
US6914574B2 (en) 2000-07-13 2005-07-05 Thomson Licensing S.A. Multiband planar antenna
CN100358183C (zh) * 2000-07-13 2007-12-26 汤姆森许可贸易公司 多频段平面天线
FR2828584A1 (fr) * 2001-08-10 2003-02-14 Thomson Licensing Sa Dispositif pour la reception et/ou l'emission de signaux a diversite de rayonnement
EP1289055A1 (de) * 2001-08-10 2003-03-05 Thomson Licensing, Inc. Vorrichtung zum Senden und/oder Empfangen von Signalen mit Strahlungsdiversity
US6891510B2 (en) 2001-08-10 2005-05-10 Thomson Licensing S.A. Device for receiving and/or emitting signals with radiation diversity

Also Published As

Publication number Publication date
DE69529261D1 (de) 2003-02-06
FR2725561B1 (fr) 1996-11-08
CN1127943A (zh) 1996-07-31
EP0707357B1 (de) 2003-01-02
JPH08242119A (ja) 1996-09-17
DE69529261T2 (de) 2003-09-04
US6798386B1 (en) 2004-09-28
FR2725561A1 (fr) 1996-04-12

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