EP1157444B1 - Antenne mit doppelbandiger elektronischerabtastung mit aktivem mirkowellenrefkelektor - Google Patents

Antenne mit doppelbandiger elektronischerabtastung mit aktivem mirkowellenrefkelektor Download PDF

Info

Publication number
EP1157444B1
EP1157444B1 EP00901684A EP00901684A EP1157444B1 EP 1157444 B1 EP1157444 B1 EP 1157444B1 EP 00901684 A EP00901684 A EP 00901684A EP 00901684 A EP00901684 A EP 00901684A EP 1157444 B1 EP1157444 B1 EP 1157444B1
Authority
EP
European Patent Office
Prior art keywords
antenna according
microwave
polarization
sources
cell
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
EP00901684A
Other languages
English (en)
French (fr)
Other versions
EP1157444A1 (de
Inventor
Claude Thomson-CSF Prop. Int. Dépt. Bre. CHEKROUN
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
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 Thales SA filed Critical Thales SA
Publication of EP1157444A1 publication Critical patent/EP1157444A1/de
Application granted granted Critical
Publication of EP1157444B1 publication Critical patent/EP1157444B1/de
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
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/06—Details
    • H01Q9/14—Length of element or elements adjustable
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/18—Phase-shifters
    • H01P1/185—Phase-shifters using a diode or a gas filled discharge tube
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/24—Polarising devices; Polarisation filters 
    • H01Q15/242—Polarisation converters
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/24—Polarising devices; Polarisation filters 
    • H01Q15/242—Polarisation converters
    • H01Q15/244—Polarisation converters converting a linear polarised wave into a circular polarised wave
    • 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
    • H01Q3/44—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the electric or magnetic characteristics of reflecting, refracting, or diffracting devices associated with the radiating element
    • H01Q3/46—Active lenses or reflecting arrays
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/40—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements
    • H01Q5/45—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements using two or more feeds in association with a common reflecting, diffracting or refracting device

Definitions

  • the present invention relates to a scanning antenna dual-band electronics, with active microwave reflector. It applies especially for microwave applications requiring two bands emission conditions also subject to very low production conditions costs. It can for example be applied for individual stations of communication with scrolling satellites, and more generally for many types of multimedia applications.
  • antennas comprising a reflector active microwave.
  • the latter also called “reflect array” in the Anglo-Saxon literature, is a network with controllable phase shifters electronically.
  • This network extends in a plane and includes a network phase control elements, or phased network, arranged in front of means reflectors, constituted for example by a metallic plane forming a plane of mass.
  • the reflective network notably includes elementary cells each carrying out reflection and phase shift, variable on command electronic, of the microwave wave it receives.
  • a primary source such as a cone, arranged in front of the reflective network emits waves towards the latter microwave.
  • Mass applications are possible for such antennas, in particular with the advent of interactive multimedia activities via satellite communications networks.
  • Scrolling satellites are arranged around the earth.
  • the ground antennas must follow the satellites. For switch from one satellite to another without phase jumps, the antennas transmit and receive on two frequency bands, with phase shifts different between these two bands.
  • Document presents scanning antenna electronic likely to operate in two crossed polarizations.
  • An object of the invention is to produce a scanning antenna dual-band electronics with reflective grating intended in particular for mass applications, and therefore of low production cost.
  • the invention relates to a scanning antenna electronic, characterized in that it comprises at least two sources microwave emitting in different frequency bands and having opposite circular polarizations, an active reflective grating comprising elementary cells illuminated by sources and a rotator polarization, interposed between the reflective grating and the sources, transforming circular polarizations into two linear polarizations crossed, an elementary cell comprising two transverse phase shifters, the first phase shifter acting on waves of linear polarization and the second phase shifter acting on the waves of the other linear polarization.
  • FIG 1 schematically illustrates an example of realization of an electronic scanning antenna with active reflective array
  • the microwave distribution is for example of the so-called optical type, that is to say for example ensured using a primary source illuminating the reflective network.
  • the antenna includes a primary source 1, for example a cornet.
  • Primary source 1 emits microwave waves 3 towards the active reflective network 4, arranged in the Oxy plane.
  • This network reflector 4 comprises a set of elementary cells carrying out the reflection and phase shift of the waves it receives. So by order phase shifts printed on the wave received by each cell, it is possible as is known, to form a microwave beam in the direction desired.
  • An antenna according to the invention comprises at least two elementary sources, for example of reverse circular polarizations, to illuminate the active reflector 4 whose elementary cells moreover have a given architecture.
  • the two sources emit waves in different frequency bands.
  • Figure 2 schematically illustrates such an antenna.
  • the latter therefore comprises two sources S D , S G , for example horns, with respective right and left polarizations. These horns illuminate an active reflective network 4 as described above.
  • a polarization rotation grid 21 is disposed in front of this reflector 4, and interposed between the latter and the sources S D , S G.
  • the polarization rotation grid transforms the circularly polarized waves emitted by these sources into linearly polarized waves.
  • An antenna according to the invention may also include elementary linear sources, of crossed polarizations. In this case, there is no need to use a polarization rotation grid.
  • Le reflector comprises a set of elementary cells 10 arranged side by side side by side and separated by zones 20, used for decoupling cell microwave. These cells 10 carry out the reflection and the phase shift of the waves they receive.
  • An elementary cell 10 includes a phase shifting microwave circuit arranged in front of a plane driver. More specifically, as will appear later, the circuit microwave has two transverse phase shifters, each dedicated to linear polarization.
  • FIG. 4 is a schematic sectional view, in the Oxz plane, of a possible embodiment of the active reflector 4.
  • the reflector 4 consists of a microwave circuit distributed in the elementary cells 10 and of a conducting plane 42, disposed substantially parallel to the microwave circuit 41, at a predefined distance d.
  • This microwave circuit receives the incident waves, for example substantially planar, emitted by the aforementioned sources S D , S G.
  • the function of the conducting plane 42 is in particular to reflect the microwave waves. It can be constituted by any known means, by example of parallel wires or a sufficiently tight mesh, or a plane continued.
  • the microwave circuit 41 and the conductive plane 42 are of preferably made on two sides of a dielectric support 43, for example of the printed circuit type.
  • the reflector 4 also comprises, preferably on the same printed circuit 43, which is then a multilayer circuit, the circuit electronics required to control phase values.
  • FIG. 5 shows, schematically, an example of production of an elementary cell 10 of an antenna according to the invention.
  • a cell includes a phase shift microwave circuit, forming part of the microwave circuit mentioned in relation to Figure 4.
  • the phase shifter comprises conductive wires 51, 51 ′ arranged on a support, for example on the front face 44 of the multilayer circuit 43.
  • the wires 51, 51 ′ have each at least two semiconductor elements with two states 521, 521 ′, 522, 522 ', diodes for example.
  • the embodiment of Figure 5 is consists of two conductive wires, each comprising two diodes in series, cross-wired and interconnected by a central conductor control 53.
  • the central conductor 53 is for example itself connected to a metallized hole 531 which connects the conductive wires 51, 51 'to the circuit electronic control arranged on the rear face 45 of the multilayer circuit, via the interconnection circuits.
  • the central conductor 53 is connected to the four diodes 521, 521 ', 522, 522' of the phase shifter, being wired between the two diodes of each of the conductive wires 51.
  • the ends of these the latter are also each connected to a control conductor 54 connected for example itself to a metallized hole 541 made in the circuit multilayer 43.
  • the ends of the conducting wires 51, 51 ′ are thus connected to the electronic control circuit.
  • each of the four diodes can then be controlled by the electronic circuit of ordered.
  • Each of the diode wires acts on the only waves whose polarization, i.e. the electric field vector, has a component which is parallel to it.
  • the polarization rotation grid 21 transforms by example right circular polarization in parallel linear polarization to a conducting wire 51 while it transforms the circular polarization left in a linear polarization parallel to the other conductive wire 51 ', a wire conductor 51 being for example parallel to the direction Ox and the other wire conductor 51 ′ being for example parallel to the direction Oy.
  • a wave received by a cell elementary 10 does not spread to other neighboring cells.
  • the invention provides decoupling zones 20 which separate the 10 cells.
  • this wave does not propagate from one cell to another, in the direction Ox.
  • a received wave linearly polarized at the direction Ox does not propagate from one cell to another in the direction Oy.
  • FIG. 6 shows a possible embodiment of these decoupling zones 20.
  • a decoupling zone 20 surrounding a cell elementary comprises a conductive strip 62.
  • the end conductors 54 which connect the conductive wires to the electronic control circuit are for example preferably located in the conductive strip 62, without however being electrically connected to the latter. For this purpose, provision is made for an interruption of the band around end conductors 54.
  • the conductive strip 62 is for example produced by deposition metallic on the front face 44, between the cells, parallel to the directions Ox and Oy.
  • This strip 62 forms, with the reflective plane 42 which is below, a space of the waveguide type whose width is the distance d.
  • the distance d is chosen so that it is less than ⁇ / 2, knowing that a wave whose polarization is parallel to tapes cannot be spread in such a space.
  • the reflector according to the invention operates in a certain band of frequencies and we choose d so that it is less than the smallest of the wavelengths of the two bands.
  • strip 62 must have a sufficient width for the effect described above to be appreciable. In practical, the width maybe of the order of ⁇ / 15.
  • the equivalent circuit relates to a conducting wire 51 and its two diodes 521, 522, in fact what corresponds to a phase shifter, associated with a given polarization and therefore with a given frequency band.
  • the incident microwave wave, of linear polarization and parallel to Oy and to the wires 51 is received on terminals B 1 and B 2 and meets three capacitors C o , C I1 , C I2 in series, connected in parallel on the terminals B 1 and B 2 .
  • the capacitance C 0 represents the linear decoupling capacitance between the end conductors 54 and the conductive strip 62 of the decoupling zone 20.
  • the capacitance C I1 is the linear capacitance between the end conductor 54 connected to the first diode 521 and the central conductor 53.
  • the capacitance C I2 is the linear capacitance between the end conductor 54 connected to the second diode 522 and the central conductor 53.
  • the second diode 522 represented by its equivalent diagram.
  • the latter is analogous to that of the first diode 521, its components bearing an index 2.
  • the microwave output voltage is taken between terminals B 3 and B 4 , terminals of the capacitors C 0 , C I1 , and C I2 .
  • phase shifter 10 The operation of the phase shifter 10 is explained below by considering, in a first step, the behavior of such a circuit in the absence of the second diode 522, which returns to the equivalent diagram of FIG. 7 to remove the 522 as well as the capacity C I2 .
  • Z is the impedance of the incident wave
  • ⁇ is the pulsation corresponding to the center frequency of one of the two operating bands of the antenna.
  • the first conducting wire 51 receives the waves emitted by the right circular polarization source S D.
  • phase shifter of a cell 10 this phase shifter corresponding to a conducting wire 51, 51 ′, can have four different values for its susceptance B D (denoted B D1 , B D2 , B D3 and B D4 ) according to the command (direct or reverse polarization) applied to each of the diodes 521, 522.
  • These values are a function of the parameters of the circuit of FIG. 7, that is to say of the values chosen for the geometric parameters (dimensions, shapes and spacings different conductive) and electrical surfaces (electrical characteristics of the diodes) of the phase shifter.
  • B CC -cotg 2 ⁇ d ⁇ where ⁇ is the wavelength corresponding to the pulsation ⁇ .
  • susceptance B C can take four distinct values (denoted B C1 , B C2 , B C3 , and B C4 ) corresponding respectively to the four values of B D , the distance d representing an additional parameter for the determination of the values B C1 - B C4 .
  • the parameters of the circuit are chosen so that the zero (or substantially zero) susceptances are such that they correspond to the diodes polarized in the direct direction, but that can of course choose a symmetrical operation in which the parameters are determined to substantially cancel the susceptances B r ; more generally, it is not necessary that one of the susceptances B d or B r is zero, these values being determined so that the condition of equal distribution of the phase shifts d ⁇ 1 -d ⁇ 4 is fulfilled.
  • an elementary cell along its second conducting wire 51 ′ can be described in a similar manner, for the waves emitted by the second source, for example S G , in another frequency band.
  • the active network 4 is illuminated by two sources S D , S G emitting respectively in right and left circular polarization and in two different frequency bands, the polarization rotation grid 21 transforming these two circular polarizations into two crossed linear polarizations allowing the cells of the active network 4 to act independently on two polarizations and in different frequency bands.
  • An elementary cell 10 in fact comprises two transverse phase shifters, preferably controllable, the first phase shifter 51, 521, 522 acting on the waves of a linear polarization and the second phase shifter 51 ', 521', 522 'acting on the waves of the other linear polarization.
  • a phase shifter and therefore its conducting wire, is substantially parallel to the direction of this polarization.
  • the polarization rotation grid 21 is arranged in such a way that the linear polarizations obtained from the circular polarizations are very substantially parallel to the phase shifters concerning them.
  • the polarization rotation grid can be a rotator of any polarization, in particular, it can be a meandering grid or a wire grid.
  • the invention advantageously makes it possible to operate on two frequency bands and adjust the phase shifts of the waves reflected by the active network, independently from one band to another. Knowing that these phase shifts determine the direction of the beams emitted by the antenna, it is so easy and quick to change the direction of the beam for the two bands frequencies. This is particularly well suited for tracking traveling satellites arranged around the Earth used in particular for all kinds of multimedia applications.
  • an antenna according to the invention is well suited for mass use, i.e. intended for a large audience, insofar as it can be carried out at low cost. Indeed, it does not contain expensive or complex components to install artwork.
  • the active network consisting of a printed circuit multilayer with components arranged on these front and rear faces is not expensive. In addition, it is perfectly suited to a production of large series.
  • the polarization rotation grid used in the case in particular where the elementary sources are polarized circular as is the case for example for applications multimedia is also inexpensive.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Aerials With Secondary Devices (AREA)

Claims (10)

  1. Elektronisch schwenkbare Antenne mit mindestens zwei Mikrowellenquellen (SD, SG), die in unterschiedlichen Frequenzbändern emittieren, wobei ein aktives Reflektornetz (4) von den Quellen (SD, SG) bestrahlte Elementarzellen (10) enthält, dadurch gekennzeichnet, daß die von den beiden Mikrowellenquellen kommenden Wellen gekreuzte Polarisationen aufweisen, daß eine Elementarzelle (10) eine leitende Ebene (42) und zwei transversale Phasenschieber enthält, wobei der erste Phasenschieber (51, 521, 522) im wesentlichen parallel zu einer linearen Polarisation und der zweite Phasenschieber (51', 521', 522') im wesentlichen parallel zur anderen linearen Polarisation liegt, daß die leitende Ebene (42) im wesentlichen parallel zu den Phasenschiebern verläuft, daß ein Phasenschieber mindestens einen dielektrischen Träger (43), mindestens einen Leiterdraht (51), der sich auf dem Träger befindet, und mindestens zwei Halbleiterelemente (521, 522) mit zwei möglichen Schaltzuständen trägt, wobei der Draht mit Steuerleitern (53, 54) für die an eine elektronische Steuerschaltung angeschlossenen Halbleiterelemente verbunden ist und wobei die Kennwerte der Zellen so sind, daß jeder der Schaltzustände der Halbleiterelemente einem gegebenen Phasenverschiebungswert (d_1, d_2, d_3, d_4) der von der Zelle (10) reflektierten elektromagnetischen Welle entspricht, deren Polarisation im wesentlichen parallel zum Leiterdraht (51) liegt.
  2. Antenne nach Anspruch 1, dadurch gekennzeichnet, daß, wenn einer der Steuerleiter (53) zentral angeordnet ist und jeder Phasenschieber zwei Halbleiter-Elemente aufweist, der zentrale Leiter (53) mit den vier Halbleiter-Elementen verbunden ist.
  3. Antenne nach einem beliebigen der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die Elementarzellen (10) durch Mikrowellen-Entkopplungszonen (20) voneinander getrennt sind, wobei eine Entkopplungszone ein leitendes Band (62) enthält, das eine Zelle im wesentlichen parallel zu den Polarisationsrichtungen umgibt und mit der leitenden Ebene (42) einen Hohlraum umgibt, in dem sich keine Welle der beiden Frequenzbänder ausbreiten kann.
  4. Antenne nach einem beliebigen der vorstehenden Ansprüche, dadurch gekennzeichnet, daß der Träger (43) eine Mehrschichten-Druckschaltung ist, deren erste Seite (44) die Mikrowellenschaltungen trägt, während eine erste Zwischenschicht die leitende Ebene (42) und die zweite Seite (45) Bauelemente (46) der elektronischen Steuerschaltung trägt.
  5. Antenne nach Anspruch 4, dadurch gekennzeichnet, daß der dielektrische Träger (43) außerdem mindestens eine zweite Zwischenschicht (47) enthält, die interne Verbindungen der elektronischen Steuerschaltung trägt.
  6. Antenne nach einem beliebigen der Ansprüche 4 und 5, dadurch gekennzeichnet, daß die Mikrowellen-Entkopplungszone (20) metallbeschichtete Löcher (541, 61) enthält, die in dem dielektrischen Träger (43) in einem geringeren gegenseitigen Abstand als die Wellenlänge der elektromagnetischen Welle angeordnet sind.
  7. Antenne nach Anspruch 6, dadurch gekennzeichnet, daß bestimmte dieser metallbeschichteten Löcher (541) die Verbindung zwischen der Steuerschaltung und Steuerleitern (54) gewährleisten.
  8. Antenne nach einem beliebigen der Ansprüche 6 und 7, dadurch gekennzeichnet, daß die metallbeschichteten Löcher (541, 61) innerhalb des leitenden Bands (62) ohne elektrischen Kontakt mit diesem angeordnet sind.
  9. Antenne nach einem beliebigen der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die Halbleiterelemente Dioden sind.
  10. Antenne nach einem beliebigen der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die Quellen einander entgegengesetzte Zirkularpolarisationen besitzen und daß die Antenne ein Organ (21) zur Polarisationsrotation enthält, das zwischen dem Reflektornetz (4) und den Quellen liegt und die Zirkularpolarisationen in zwei gekreuzte lineare Polarisationen umwandelt.
EP00901684A 1999-02-05 2000-01-31 Antenne mit doppelbandiger elektronischerabtastung mit aktivem mirkowellenrefkelektor Expired - Lifetime EP1157444B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9901378A FR2789521A1 (fr) 1999-02-05 1999-02-05 Antenne a balayage electronique bi-bande, a reflecteur hyperfrequence actif
FR9901378 1999-02-05
PCT/FR2000/000220 WO2000046876A1 (fr) 1999-02-05 2000-01-31 Antenne a balayage electronique bi-bande, a reflecteur hyperfrequence actif

Publications (2)

Publication Number Publication Date
EP1157444A1 EP1157444A1 (de) 2001-11-28
EP1157444B1 true EP1157444B1 (de) 2003-07-30

Family

ID=9541662

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00901684A Expired - Lifetime EP1157444B1 (de) 1999-02-05 2000-01-31 Antenne mit doppelbandiger elektronischerabtastung mit aktivem mirkowellenrefkelektor

Country Status (6)

Country Link
US (1) US6437752B1 (de)
EP (1) EP1157444B1 (de)
AU (1) AU2300700A (de)
DE (1) DE60004174T2 (de)
FR (1) FR2789521A1 (de)
WO (1) WO2000046876A1 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2814594B1 (fr) * 2000-09-22 2002-12-06 Thomson Csf Reseau reflecteur a capacites de decouplage integrees
FR2820886A1 (fr) * 2001-02-13 2002-08-16 Thomson Csf Panneau reflecteur hyperfrequence
FR2879359B1 (fr) * 2004-12-15 2007-02-09 Thales Sa Antenne a balayage electronique large bande
GB201811092D0 (en) * 2018-07-05 2018-08-22 Npl Management Ltd Reflectarray antenna element
CN112332106B (zh) * 2020-09-15 2022-10-18 上海大学 一种极化和相位360度可调的透镜单元
CN116470295B (zh) * 2023-03-30 2024-08-06 中国人民解放军战略支援部队航天工程大学 具有两种圆极化超表面单元的双频可重构反射阵列天线

Family Cites Families (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3569974A (en) * 1967-12-26 1971-03-09 Raytheon Co Dual polarization microwave energy phase shifter for phased array antenna systems
DE2055443C3 (de) * 1970-11-11 1982-02-25 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Polarisationswandler für Mikrowellen
US3706998A (en) * 1971-02-03 1972-12-19 Raytheon Co Multiple interleaved phased antenna array providing simultaneous operation at two frequencies and two polarizations
FR2382109A1 (fr) * 1977-02-25 1978-09-22 Thomson Csf Transformateur de polarisation hyperfrequence
FR2395620A1 (fr) 1977-06-24 1979-01-19 Radant Etudes Perfectionnement au procede de balayage electronique utilisant des panneaux dielectriques dephaseurs
FR2448231A1 (fr) 1979-02-05 1980-08-29 Radant Et Filtre spatial adaptatif hyperfrequence
FR2469808A1 (fr) 1979-11-13 1981-05-22 Etude Radiant Sarl Dispositif de balayage electronique dans le plan de polarisation
FR2733091B1 (fr) 1983-05-06 1997-05-23 Cmh Sarl Repondeur hyperfrequence electriquement controlable et ses applications a la realisation de leurres electromagnetiques
FR2723210B1 (fr) 1983-05-06 1997-01-10 Cmh Sarl Procede et dispositif antidetection pour radar
FR2629920B1 (fr) 1984-01-23 1991-09-20 Cmh Sarl Filtre spatial adaptatif hyperfrequence fonctionnant a la reflexion et son procede de mise en oeuvre
FR2732469B1 (fr) 1984-01-23 1997-04-11 Cmh Sarl Dispositif utilisant une antenne auxiliaire equipee d'un filtre spatial adaptatif pour l'embrouillage d'une antenne principale associee, et son procede de mise en oeuvre
US4975712A (en) * 1989-01-23 1990-12-04 Trw Inc. Two-dimensional scanning antenna
US5055805A (en) * 1989-10-02 1991-10-08 Rockwell International Corporation High speed polarization switch array for selecting a particular orthogonal polarization
FR2656468B1 (fr) 1989-12-26 1993-12-24 Thomson Csf Radant Source de rayonnement microonde magique et son application a une antenne a balayage electronique.
FR2747842B1 (fr) * 1990-06-15 1998-09-11 Thomson Csf Radant Lentille hyperfrequence multibande et son application a une antenne a balayage electronique
FR2725077B1 (fr) 1990-11-06 1997-03-28 Thomson Csf Radant Lentille hyperfrequence bipolarisation et son application a une antenne a balayage electronique
FR2671194B1 (fr) 1990-12-27 1993-12-24 Thomson Csf Radant Systeme de protection d'un equipement electronique.
FR2689320B1 (fr) * 1992-03-24 1994-05-13 Thomson Csf Antenne dalle a balayage electronique et a fonctionnement en bipolarisation.
US5280297A (en) * 1992-04-06 1994-01-18 General Electric Co. Active reflectarray antenna for communication satellite frequency re-use
CA2105745C (en) * 1992-09-21 1997-12-16 Parthasarathy Ramanujam Identical surface shaped reflectors in semi-tandem arrangement
US5389939A (en) * 1993-03-31 1995-02-14 Hughes Aircraft Company Ultra wideband phased array antenna
FR2708808B1 (fr) * 1993-08-06 1995-09-01 Thomson Csf Radant Panneau déphaseur à quatre états de phase et son application à une lentille hyperfréquence et à une antenne à balayage électronique.
US5847681A (en) * 1996-10-30 1998-12-08 Hughes Electronics Corporation Communication and tracking antenna systems for satellites
FR2786610B1 (fr) 1997-02-03 2001-04-27 Thomson Csf Reflecteur hyperfrequence actif pour antenne a balayage electronique
US5892485A (en) * 1997-02-25 1999-04-06 Pacific Antenna Technologies Dual frequency reflector antenna feed element

Also Published As

Publication number Publication date
DE60004174T2 (de) 2004-04-15
WO2000046876A1 (fr) 2000-08-10
EP1157444A1 (de) 2001-11-28
US6437752B1 (en) 2002-08-20
FR2789521A1 (fr) 2000-08-11
DE60004174D1 (de) 2003-09-04
AU2300700A (en) 2000-08-25

Similar Documents

Publication Publication Date Title
EP2656438B1 (de) Strahlende zelle mit zwei phasenzuständen für ein sendendes netzwerk
EP2571098B1 (de) Rekonfiguerierbare strahlende dephasierende Zelle, die auf Spaltresonanzen und komplementären Mikrostreifen basiert
FR2868216A1 (fr) Cellule dephaseuse a polarisation lineaire et a longueur resonante variable au moyen de commutateurs mems
EP3011639A1 (de) Quelle für eine parabolantenne
EP0462864A1 (de) Vorrichtung zur Speisung von Strahlungselementen einer Gruppenantenne und ihre Verwendung für eine Antenne eines Landungshilfssystems vom Typ MLS
EP1234356B1 (de) Aktiver hf reflektor unter verwendung von elektronischer strahlschwenkung
EP3180816B1 (de) Mehrbandige quelle mit koaxialem horn mit monopulsnachführungsverfahren für eine reflektorantenne
EP1157444B1 (de) Antenne mit doppelbandiger elektronischerabtastung mit aktivem mirkowellenrefkelektor
EP0518271A1 (de) Mikrowellen-Antennenelement mit zwei Polarisationen
EP1305846B1 (de) Doppelpolarisierter aktiver mikrowellenreflektor, insbesondere für antenne mit elektronischer strahlschwenkung
EP0047686A1 (de) Hybrider Mikrowellenmischer
CA2808511C (fr) Antenne plane pour terminal fonctionnant en double polarisation circulaire, terminal aeroporte et systeme de telecommunication par satellite comportant au moins une telle antenne
FR2786610A1 (fr) Reflecteur hyperfrequence actif pour antenne a balayage electronique
EP1139484B1 (de) Mikrowellenphasenschieber und phasengesteuerte Gruppenantenne mit derartigen Phasenschiebern
EP1133000B1 (de) Aktiver Mikrowellenreflektor für Antenne mit elektronischer Strahlschwenkung
EP3900113B1 (de) Elementare mikrostreifenantenne und gruppenantenne
FR2738398A1 (fr) Panneau dephaseur a diodes et son application a une lentille hyperfrequence et une antenne a balayage electronique
FR2747842A1 (fr) Lentille hyperfrequence multibande et son application a une antenne a balayage electronique
EP0380397B1 (de) Gegentakt-Modulator für ein elektromagnetisches Mikrowellensignal hoher Leistung
EP0156684A1 (de) Strahlendes Mirkowellenelement und seine Anwendung in einer elektronisch gesteuerten Antenne
EP0088681B1 (de) Doppelreflektorantenne mit eingebautem Polarisationswandler
FR2815479A1 (fr) Reflecteur hyperfrequence actif a deux polarisations independantes, notamment pour antenne a balayage electronique
WO2021023511A1 (fr) Dispositif optoelectronique planaire de generation d'un signal hyperfrequence.
WO2012131086A1 (fr) Antenne reseau directive large bande, du type a circuit imprime

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20010828

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

17Q First examination report despatched

Effective date: 20020130

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): DE FR GB IT NL SE

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: FRENCH

REF Corresponds to:

Ref document number: 60004174

Country of ref document: DE

Date of ref document: 20030904

Kind code of ref document: P

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20031114

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20040504

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20060103

Year of fee payment: 7

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20070801

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070801

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20120117

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20130123

Year of fee payment: 14

Ref country code: FR

Payment date: 20130204

Year of fee payment: 14

Ref country code: SE

Payment date: 20130114

Year of fee payment: 14

Ref country code: GB

Payment date: 20130130

Year of fee payment: 14

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 60004174

Country of ref document: DE

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20140131

REG Reference to a national code

Ref country code: SE

Ref legal event code: EUG

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140801

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20140930

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 60004174

Country of ref document: DE

Effective date: 20140801

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140131

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140201

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140131

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140131