EP0539297B1 - Vorrichtung mit einstellbarer frequenzselektiver Oberfläche - Google Patents

Vorrichtung mit einstellbarer frequenzselektiver Oberfläche Download PDF

Info

Publication number
EP0539297B1
EP0539297B1 EP19920402888 EP92402888A EP0539297B1 EP 0539297 B1 EP0539297 B1 EP 0539297B1 EP 19920402888 EP19920402888 EP 19920402888 EP 92402888 A EP92402888 A EP 92402888A EP 0539297 B1 EP0539297 B1 EP 0539297B1
Authority
EP
European Patent Office
Prior art keywords
components
layer
elementary patterns
insulator
deposited
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
EP19920402888
Other languages
English (en)
French (fr)
Other versions
EP0539297A1 (de
Inventor
Alain Résidence Parc Caudéran France
Jean-Jacques Résidence Rosiers Bellevue Niez
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.)
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
Original Assignee
Commissariat a lEnergie Atomique CEA
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 Commissariat a lEnergie Atomique CEA filed Critical Commissariat a lEnergie Atomique CEA
Publication of EP0539297A1 publication Critical patent/EP0539297A1/de
Application granted granted Critical
Publication of EP0539297B1 publication Critical patent/EP0539297B1/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
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
    • H01Q15/0013—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective
    • H01Q15/002—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective said selective devices being reconfigurable or tunable, e.g. using switches or diodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
    • 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

Definitions

  • the invention relates to a device with frequency selective surface comprising at least one network of conductive elements constituting elementary patterns.
  • the price to be paid expressed in kilograms per square meter of coating, may appear high compared to the reduction in reflectivity obtained, and the power to be dissipated.
  • the frequency selective surfaces constituted by conductive patterns isolated from each other and repeating periodically on the same surface, can be used to constitute very effective non-reflecting structures for a very narrow frequency or band. of given frequency.
  • the operating wavelength is very closely linked to the dimensions of the patterns, and it is therefore impossible to obtain with such surfaces a low reflectivity in very wide frequency ranges.
  • the object of the present invention is to remedy these drawbacks
  • US-A-3 955 201 describes an antenna system comprising an array of conductive elements and means of coupling between these elements selected by control means. These coupling means comprise a first series of electronic components, a second series of electronic components making it possible to actuate the components of the first series and to control their conduction. The components of the second series are connected by an addressing wire to the control means, or to two addressing wires making it possible to obtain a matrix addressing.
  • the components of the first series are photodiodes, that is to say photosensitive switches which can be triggered by a photoluminescent diode, as well as components with two inputs and with non-linear transfer function or triacs, i.e. components with 3 inputs.
  • This antenna system can be used as a radar antenna, and be connected to radio-frequency supply means so as to be able to operate as a transmit-receive antenna.
  • the subject of the invention is a device with frequency selective surface comprising at least one row-column network of elementary conductive patterns, characterized in that it comprises at least one row-column network of coupling components, each coupling component being suitable for coupling between two neighboring conductive elementary patterns along a line or a column, to which it is connected, at least one network of electronic components connected to conductive lines and to conductive columns, allowing the addressing-line and the column addressing of these electronic components, each electronic component enabling a coupling component to be actuated, control means comprising a processor and a memory containing the different possible configurations to be given to the network of elementary patterns as a function of the selected frequency, the processor allowing to read the corresponding configuration in the memory and send the control signals to the conductive lines and to the conductive columns to obtain this configuration.
  • the coupling means comprise a first series of electronic components and a second series of electronic components making it possible to actuate the components of the first series and to control their conduction.
  • FIG. 1 shows a diagram of a device according to the invention.
  • This device is a device with frequency selective surface tunable. It comprises a network 1 of conductive elements bearing the reference 2. These conductive elements 2 constitute elementary patterns such as those which are for example represented in this figure in a cruciform form.
  • the network is capable of absorbing radiofrequency radiation at a given desired frequency and of behaving as a mirror, that is to say as a reflecting surface for radiofrequency radiation. frequency other than this given frequency.
  • the elementary patterns will be able to be coupled together according to predetermined configurations which will make the surface, that is to say the network of conductive elements, tunable over a wide range of frequencies.
  • the device with frequency selective surface is made tunable, that is to say that it can be absorbent with respect to radiofrequency radiation in a wide frequency range.
  • this device also makes it possible, as will be described later, to act as a broadband transmit-receive antenna.
  • FIG. 1 also shows control means 3 and means 4 making it possible to establish couplings between the conductive elements of the various elementary patterns.
  • the control means 3 are capable of receiving different frequencies over a wide range of frequencies and of controlling and selecting the coupling means 4 so as to modify the apparent dimension of the elementary patterns making thus the selective network tunable on each of the input frequencies f1, f2, ... fn.
  • control means 3 make it possible to perform a matrix addressing of the network in order to select and control the couplings between elementary patterns.
  • control means 3 instead of performing a matrix addressing it will be possible under certain conditions to perform a parallel addressing.
  • control means comprise a memory 31 and a processor 32.
  • the memory contains the different possible configurations to be given to the network as a function of the input frequencies which the processor can receive.
  • the processor makes it possible to go read in the memory the configuration to be given to this network according to the frequency it receives and to address the network accordingly to order or control the couplings to be carried out.
  • FIG. 2A illustrates a portion of the network and shows in more detail the coupling means according to the invention.
  • These coupling means comprise a first series of electronic components 44 capable of establishing a coupling and a second series of electronic components 45 making it possible to actuate the components of the first series.
  • a coupling component 44 is provided between the ends of the patterns (cruciform) lying in the same alignment. According to the embodiment which is represented in FIG. 2, we therefore have coupling components 44 along lines and according to columns, lines and columns which will make it possible, as will be detailed, to select these components to control them so as to produce or not to produce coupling between the two elementary patterns to which they are connected.
  • the second series of components 45 makes it possible to select and command or control the coupling carried out by the components 44.
  • a component 45 is provided per component 44. These components 45 are therefore found in a matrix form and are connected to conductor lines 42 and to conductive columns 41. The lines 42 allow the row addressing in coupling components and the columns 41 allow the column addressing of these components.
  • the processor 32 of FIG. 1 makes it possible to send control signals to these addressing control wires which will allow the components 45 to control the components 44 so that these components 44 assume the logic state corresponding to the logic state which has been recorded in memory 31 for the input frequency received by processor 32.
  • FIG. 2B makes it possible to detail, in a functional manner, the connections made by the components 44 and by the components 45.
  • a component 44 has two connection points bearing the references 1 and 2 and a connection point 3.
  • the component receives a signal on its input 3, it performs the coupling symbolized by the switch between points 1 and 2 which in the network corresponds in fact to a coupling between two elementary patterns according to a given alignment.
  • Component 45 has two addressing inputs which are inputs 1 and 2, a control voltage output which is point 3 and an input which is the supply voltage VCC.
  • the address entry points are connected to the address control wires 41 and 42 of the network.
  • the components used to establish the couplings and establish the selection and coupling commands are of the switch type.
  • the device according to the invention can be two-dimensional or three-dimensional. In the latter case the two networks which it comprises are on two superimposed planes.
  • FIG. 1 shows a single network of conductive elements constituting metallic elementary patterns (possibly endowed with magnetic properties of ferromagnetic type) cruciform, square or stick-shaped. Their repetition step in the directions of the plane can be equal or different.
  • These elementary patterns can be associated with each other locally. For this they will be coupled together so as to form groups of elementary patterns.
  • the coupling when it is carried out between these different elementary patterns makes it possible to conduct the air gap between certain contiguous crosses, while respecting a periodicity in the two directions of the plane.
  • These couplings have the effect of change the size and possibly the shape of the elementary patterns and consequently modify the tuning frequencies of the electromagnetic filter thus produced.
  • an appropriate control signal of the coupling components 44 will be used depending on the choice of these components so that they do not operate in all or nothing. This control will make it possible to pass continuously from the short circuit to an open circuit, which also relatively modifies the electromagnetic properties of the filter without necessarily the effective electromagnetic pitch of the network being modified.
  • the invention makes it possible to obtain a possible decoupling of the magnetic properties and electrical associated with the shapes of the elementary patterns.
  • the components of the switch type 44 are controlled at the level of their control by switches 45 of the MOSFET type for example, one end of which is connected to a power source and the controls of which (these are grids for MOSFET transistors) are independently controlled from one another by the matrix addressing mode which has been previously described and which is of the type found in DRAM memories as already described.
  • the memory provided in the control means is loaded by the various configurations of the patterns which it is desired to implement on the network. This memory may contain the pitch of the patterns, the radioelectric properties of the air gap.
  • the processor is capable of going to read in the memory the information which will enable it to supply addressing command signals to obtain this configuration.
  • a network it is possible, for example, to deposit the elementary patterns, the components and the addressing lines on or in an insulating surface (constituting a substrate).
  • This substrate can for example be silicon oxide.
  • Such a network behaves electromagnetically and or infrared as a frequency selective surface.
  • coupling means in said network makes it possible to control the equivalent dielectric properties of the material located between the elementary patterns and which has been called air gap. This control can lead to extreme situations which are complete electrical insulation or short circuit.
  • components 44 and 45 and of the addressing lines 1, 2 which is carried out by conventional deposition and etching techniques used in microelectronics can be carried out on separate planes from that on which the patterns 2 are placed. components and lines can therefore be in the insulating surface (substrate) or on this insulating surface.
  • FIG. 3 illustrates a possible configuration obtained for the device according to the invention.
  • the continuity of the air gaps between the different elementary patterns has been symbolized by a continuity of the patterns.
  • Figure 4 illustrates another possible configuration in which the network has independent elementary patterns on its periphery.
  • the interior of the network constitutes a mesh of rectangular shape.
  • This configuration can be used to make a radiofrequency transmit-receive antenna.
  • the network will further comprise, as can be seen in section AA 'shown diagrammatically below the network, means 6 for radiofrequency supply of the radiating elements.
  • This section AA therefore shows the radiating elements 2 on the surface of the dielectric substrate 10.
  • the radiating elements 2 are supplied by conductive lines 6 which pass through the substrate.
  • the substrate also includes for this, for example on its underside, a conductive structure 7 constituting an electrical mass for the device.
  • the device as described with reference to FIG. 4 can have a configuration for operating as an antenna only for the time strictly necessary for the transmission-reception function, which only changes the reflectivity of the surface for very short times. Outside these transmission-reception periods, the device remains a tunable frequency selective surface.

Landscapes

  • Aerials With Secondary Devices (AREA)
  • Waveguide Switches, Polarizers, And Phase Shifters (AREA)

Claims (12)

  1. Vorrichtung mit frequenzselektiver Oberfläche, wenigstens ein Zeilen-Spalten-Gitter (1) aus leitenden Elementarmustern (2) umfassend,
    dadurch gekennzeichnet,
    daß sie umfaßt: wenigstens ein Zeilen-Spalten-Gitter aus Kopplungskomponenten (44), wobei jede Kopplungskomponente fähig ist, die Kopplung zwischen zwei benachbarten Elementarmustern (2) entsprechend einer Zeile oder einer Spalte herzustellen, mit denen sie verbunden ist, wenigstens ein Gitter aus elektronischen Komponenten (45), verbunden mit leitenden Zeilen (42) und leitenden Spalten (41), welche die Zeilenadressierung und die Spaltenadressierung dieser elektronischen Komponenten (45) ermöglichen, wobei jede elektronische Komponente (45) ermöglicht, eine Kopplungskomponente (44) zu betätigen, Steuereinrichtungen mit einem Prozessor (32) und einen Speicher (31), die verschiedenen Konfigurationen enthaltend, die dem Elementarmuster-Gitter in Abhängigkeit von der gewählten Frequenz zu geben möglich ist, wobei der Prozessor ermöglicht, die entsprechende Konfiguration in dem Speicher zu lesen und die Steuersignale an die leitenden Zeilen (42) und an die leitenden Spalten (41) zu senden, um diese Konfiguration zu erhalten bzw. herzustellen.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Komponenten (44, 45) vom Schaltertyp sind.
  3. Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Komponenten (44) der ersten Serie lichtempfindliche Komponenten sind, die durch eine photolumineszente Diode ausgelöst werden.
  4. Vorrichtung nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet, daß die Komponenten (44) der ersten Serie Komponenten mit drei Eingängen sind.
  5. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Komponenten (44) der ersten Serie nichtlineare Übertragungsfunktionskomponenten mit zwei Eingängen sind.
  6. Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Komponenten (45) der zweiten Serie MOSFET-Transistoren sind, deren eine Elektrode mit einer Versorgungsspannung (VCC) verbunden ist und deren Steuerelektroden mit den Adressierungssteuerdrähten (41, 42) verbunden sind.
  7. Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Elementarmuster (2) auf einer Isolatorschicht (10) abgeschieden sind.
  8. Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die elektronischen Komponenten (44, 45) auf der die Elementarmuster (2) tragenden Isolatorschicht (10) abgeschieden sind.
  9. Vorrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die elektronischen Komponenten (44, 45) auf einer ersten Isolatorschicht abgeschieden sind und die leitenden Elemente auf einer zweiten Isolatorschicht abgeschieden sind, wobei die zweite Schicht die erste überdeckt.
  10. Vorrichtung nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß die Vorrichtung mehrere Gitter aus Elementarmustern umfaßt, wobei jedes auf einer Isolatorschicht abgeschieden ist, die verschiedenen Schichten sich überdecken und die Vorrichtung somit eine absorbierende Struktur mit variabler elektrischer Tiefe bildet.
  11. Vorrichtung nach Anspruch 10, dadurch gekennzeichnet, daß die elektronischen Komponenten, die die Kopplungen für ein bestimmtes Gitter gewährleisten, auf der Isolatorschicht abgeschieden sind, die die entsprechenden leitenden Elemente trägt.
  12. Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die leitenden Elemente mit Radio- bzw. Hochfrequenz-Versorgungseinrichtungen (6) verbunden sind, um als als Sende-/Empfangsantenne funktionieren zu können.
EP19920402888 1991-10-25 1992-10-22 Vorrichtung mit einstellbarer frequenzselektiver Oberfläche Expired - Lifetime EP0539297B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9113202 1991-10-25
FR919113202A FR2683050B1 (fr) 1991-10-25 1991-10-25 Dispositif a surface selective en frequence accordable.

Publications (2)

Publication Number Publication Date
EP0539297A1 EP0539297A1 (de) 1993-04-28
EP0539297B1 true EP0539297B1 (de) 1997-05-28

Family

ID=9418325

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920402888 Expired - Lifetime EP0539297B1 (de) 1991-10-25 1992-10-22 Vorrichtung mit einstellbarer frequenzselektiver Oberfläche

Country Status (3)

Country Link
EP (1) EP0539297B1 (de)
DE (1) DE69219993T2 (de)
FR (1) FR2683050B1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7868829B1 (en) 2008-03-21 2011-01-11 Hrl Laboratories, Llc Reflectarray
US8982011B1 (en) 2011-09-23 2015-03-17 Hrl Laboratories, Llc Conformal antennas for mitigation of structural blockage
US8994609B2 (en) 2011-09-23 2015-03-31 Hrl Laboratories, Llc Conformal surface wave feed
US9466887B2 (en) 2010-11-03 2016-10-11 Hrl Laboratories, Llc Low cost, 2D, electronically-steerable, artificial-impedance-surface antenna
CN105929567B (zh) * 2016-06-03 2018-07-13 华中科技大学 一种双路电控纳线簇电极的电调光透射薄膜

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6426722B1 (en) 2000-03-08 2002-07-30 Hrl Laboratories, Llc Polarization converting radio frequency reflecting surface
US6812903B1 (en) 2000-03-14 2004-11-02 Hrl Laboratories, Llc Radio frequency aperture
US6518931B1 (en) 2000-03-15 2003-02-11 Hrl Laboratories, Llc Vivaldi cloverleaf antenna
US6496155B1 (en) 2000-03-29 2002-12-17 Hrl Laboratories, Llc. End-fire antenna or array on surface with tunable impedance
US6483480B1 (en) * 2000-03-29 2002-11-19 Hrl Laboratories, Llc Tunable impedance surface
US6552696B1 (en) 2000-03-29 2003-04-22 Hrl Laboratories, Llc Electronically tunable reflector
US6483481B1 (en) 2000-11-14 2002-11-19 Hrl Laboratories, Llc Textured surface having high electromagnetic impedance in multiple frequency bands
US6739028B2 (en) 2001-07-13 2004-05-25 Hrl Laboratories, Llc Molded high impedance surface and a method of making same
US6670921B2 (en) 2001-07-13 2003-12-30 Hrl Laboratories, Llc Low-cost HDMI-D packaging technique for integrating an efficient reconfigurable antenna array with RF MEMS switches and a high impedance surface
US6545647B1 (en) 2001-07-13 2003-04-08 Hrl Laboratories, Llc Antenna system for communicating simultaneously with a satellite and a terrestrial system
FR2858469B1 (fr) * 2003-07-30 2005-11-18 Univ Rennes Antenne a cavite resonante, reconfigurable
US6950629B2 (en) * 2004-01-23 2005-09-27 Delphi Technologies, Inc. Self-structuring antenna system with memory
US7190325B2 (en) * 2004-02-18 2007-03-13 Delphi Technologies, Inc. Dynamic frequency selective surfaces
EP1722618A4 (de) * 2004-03-01 2008-10-29 Nitta Corp Absorber für elektromagnetische wellen
US8380132B2 (en) 2005-09-14 2013-02-19 Delphi Technologies, Inc. Self-structuring antenna with addressable switch controller
US7558555B2 (en) 2005-11-17 2009-07-07 Delphi Technologies, Inc. Self-structuring subsystems for glass antenna
US8212739B2 (en) 2007-05-15 2012-07-03 Hrl Laboratories, Llc Multiband tunable impedance surface
US8947892B1 (en) 2010-08-16 2015-02-03 The Boeing Company Electronic device protection
US8325495B2 (en) 2010-08-16 2012-12-04 The Boeing Company Electronic device protection
CN105739131B (zh) * 2016-03-15 2018-11-02 华中科技大学 一种可寻址电调光反射率薄膜
CN105938260B (zh) * 2016-06-02 2018-09-21 华中科技大学 一种基于金属平面微纳线尖电极的电调透光率薄膜
CN105938259B (zh) * 2016-06-02 2018-09-21 华中科技大学 一种基于金属基平面纳尖簇电极的电调透光率薄膜
FR3091420B1 (fr) * 2018-12-28 2021-01-22 Thales Sa Dispositif a metasurface reconfigurable

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3955201A (en) * 1974-07-29 1976-05-04 Crump Lloyd R Radar randome antenna with switchable R.F. transparency/reflectivity
US4684954A (en) * 1985-08-19 1987-08-04 Radant Technologies, Inc. Electromagnetic energy shield
US4922253A (en) * 1989-01-03 1990-05-01 Westinghouse Electric Corp. High attenuation broadband high speed RF shutter and method of making same

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7868829B1 (en) 2008-03-21 2011-01-11 Hrl Laboratories, Llc Reflectarray
US9466887B2 (en) 2010-11-03 2016-10-11 Hrl Laboratories, Llc Low cost, 2D, electronically-steerable, artificial-impedance-surface antenna
US8982011B1 (en) 2011-09-23 2015-03-17 Hrl Laboratories, Llc Conformal antennas for mitigation of structural blockage
US8994609B2 (en) 2011-09-23 2015-03-31 Hrl Laboratories, Llc Conformal surface wave feed
CN105929567B (zh) * 2016-06-03 2018-07-13 华中科技大学 一种双路电控纳线簇电极的电调光透射薄膜

Also Published As

Publication number Publication date
DE69219993T2 (de) 1997-12-18
FR2683050B1 (fr) 1994-03-04
DE69219993D1 (de) 1997-07-03
EP0539297A1 (de) 1993-04-28
FR2683050A1 (fr) 1993-04-30

Similar Documents

Publication Publication Date Title
EP0539297B1 (de) Vorrichtung mit einstellbarer frequenzselektiver Oberfläche
EP0237429B1 (de) Phasengesteuerte Reflektorstrahlergruppe und Antenne mit einer solchen Gruppe
EP0374008B1 (de) Den vollen Raumwinkel abtastende elektronische Antenne mit räumlich zufällig verteilten, verdünnt angeordneten Strahlern
EP0800210B1 (de) Kompakter Mikrowellenmodul
CA2148796C (fr) Antenne fil-plaque monopolaire
EP0014650A1 (de) Adaptives Höchstfrequenz-Raumfilter und dessen Verfahren der Anwendung zur Abschwächung oder Unterdrückung der Nebenzipfel des Strahlungsdiagrammes einer Antenne
EP0145597A2 (de) Ebene periodische Antenne
WO2013092928A1 (fr) Antenne élémentaire et antenne réseau mono ou bidimensionnelle correspondante
WO2004001899A1 (fr) Cellule dephaseuse pour reseau reflecteur d'antenne
EP1430566B1 (de) Breit- oder multi-bandantenne
EP0519772B1 (de) Mikrowellenantenne mit optoelektronisch gesteuertem Absuchen
EP1234356B1 (de) Aktiver hf reflektor unter verwendung von elektronischer strahlschwenkung
EP0435739B1 (de) Magische Mikrowellenquelle und ihre Anwendung bei einer Antenne mit elektronischem Absuchen
FR2685550A1 (fr) Element reflecteur d'hyperfrequences.
FR2812457A1 (fr) Reflecteur hyperfrequence actif a bi-polarisation, notamment pour antenne a balalyage electronique
FR2512280A1 (fr) Panneau commutateur spatial hyperfrequence et procede de mise en oeuvre d'un tel panneau
EP0595726A1 (de) Phasenschieber für elektromagnetische Wellen und Verwendung in einer Antenne mit elektronischer Ablenkung
EP1157444B1 (de) Antenne mit doppelbandiger elektronischerabtastung mit aktivem mirkowellenrefkelektor
FR3091046A1 (fr) Antenne microruban élémentaire et antenne réseau
FR2747842A1 (fr) Lentille hyperfrequence multibande et son application a une antenne a balayage electronique
EP0088681B1 (de) Doppelreflektorantenne mit eingebautem Polarisationswandler
EP0412855B1 (de) Elektrisch/akustischer und akustisch/elektrischer Wandler für Oberflächenwellenanordnung mit niedriger Diffraktion und entsprechende Oberflächenwellenanordnung
WO2022023125A1 (fr) Dispositif a metasurface
FR2907262A1 (fr) Cellule dephaseuse a dephaseur analogique pour antenne de type"reflectarray".
FR2814594A1 (fr) Reseau reflecteur a capacites de decouplage integrees

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

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE DK GB IT

17P Request for examination filed

Effective date: 19931004

17Q First examination report despatched

Effective date: 19950818

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

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

Kind code of ref document: B1

Designated state(s): DE DK GB IT

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 FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 19970528

Ref country code: DK

Effective date: 19970528

REF Corresponds to:

Ref document number: 69219993

Country of ref document: DE

Date of ref document: 19970703

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

Effective date: 19970818

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

Ref country code: GB

Payment date: 19981007

Year of fee payment: 7

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

Ref country code: DE

Payment date: 19981019

Year of fee payment: 7

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

Ref country code: GB

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

Effective date: 19991022

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

Effective date: 19991022

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: 20000801