EP0000308A1 - Electronic scanning device comprising dielectric panels as phaseshifters - Google Patents

Electronic scanning device comprising dielectric panels as phaseshifters Download PDF

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Publication number
EP0000308A1
EP0000308A1 EP78400030A EP78400030A EP0000308A1 EP 0000308 A1 EP0000308 A1 EP 0000308A1 EP 78400030 A EP78400030 A EP 78400030A EP 78400030 A EP78400030 A EP 78400030A EP 0000308 A1 EP0000308 A1 EP 0000308A1
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Prior art keywords
wires
diodes
diode
wire
electronic scanning
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EP78400030A
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German (de)
French (fr)
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EP0000308B1 (en
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Claude Chekroun
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D'ETUDE DU RADANT Ste
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D'ETUDE DU RADANT Ste
RADANT ETUDES
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    • 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
    • H01Q3/26—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 relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
    • H01Q3/30—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 relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
    • H01Q3/34—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 relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means
    • H01Q3/36—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 relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means with variable phase-shifters
    • H01Q3/38—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 relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means with variable phase-shifters the phase-shifters being digital
    • 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

Definitions

  • v 50 volts, a voltage of 10,000 volts.
  • Such voltage values impose very high insulation between the different wires either from the same network of a phase-shifting panel or between the wires of the networks of adjacent phase-shifting panels or between the control wires outside the phase-shifting panels.
  • this diode wire forming part of the networks of metallic wires constituting the phase-shifting panels which are the subject of French patents 2 063 967 and 2 224 887.
  • This process allows a supply without the introduction of additional control wires, makes it possible to simultaneously supply all the diodes of '' a single wire and does not require the use of very high supply voltages disturbing for the diodes as well as for the control circuit external to the phase shift panel, and which moreover makes it possible to increase the width of the frequency band of waves of use of the panel and allows a better control of the value of the differential phase shift between the two states of the phase shift panel according to that the wires with dio arrays of diode wires are electrically continuous or sectioned.
  • the improvement of the electronic scanning method according to the invention consists in constituting a network of parallel conductive wires carrying diodes intended, depending on their condition, to make these wires continuous or cut and of continuous metal wires, parallel to the wires carrying diodes and located on either side of the diode wire, at the same distance from it, each of the diode wires thus being associated with two continuous wires which are used for food ter groups of diodes of this diode wire, on each of the conducting wires carrying diodes being mounted a group of diodes in series, then another group of the same number of diodes, also in series but inverted with respect to the preceding ones, and create between the two continuous conductive wires which surround the diode wire conductive bridges between each point of the diode wire located between two groups of diodes of different directions and alternatively the continuous wire located on one side then on the other side of the wire diodes, so that each group of diodes in series is supplied by the voltage, to which is carried one of the two continuous son fram
  • the two continuous metallic wires (6) and (7) which frame the wire (3) are 8 mm on either side of ci, the diameter of the wires (6) and (7) is 0.22 mm.
  • Conductive strands (9) of 0.22 mm in diameter connect the points of the wire (3) located at the start of a group of diodes of the same direction to the wire (6) identical conductive strands connect the joints of the wire (3) located at the end of these same groups of diodes on the wire (7).
  • One end of the wire (6) outside the panel is connected at will to a voltage source of 500 volts, the end of the associated wire (7) being simultaneously brought to zero voltage. Therefore all the diodes (4) and (5). Are supplied in reverse under the average unit voltage of 50 volts necessary for their blocking.
  • the wire (3) becomes discontinuous and cut into sections of identical unit length defined by the pitch of the diodes (a).
  • the wire (6) is brought to a zero voltage and the wire (7) to a voltage of 5 volts. All the diodes (4) and (5) of the wire (1) are then supplied directly.
  • the wire (3) is continuous and traversed by a current of two milli-amps.
  • the panel thus formed is suitable for the transmission of waves of 3000 megahertz frequency, when the diodes on both sides of the panel are in the same state.
  • the differential phase shift due to the panel crossing by the 3000 MHz microwave wave with polarization parallel to the arrays of wires, for the two states of the diodes is 42 degrees and the attenuation is less than 0.12 decibel.
  • the external connections to the phase shift panel concerned can be grouped on the same side of this panel.
  • the voltage supply wires of the diode groups are integrated into the panel and also have a microwave function improving the possibilities of adaptation of the panel in a larger frequency band.
  • the subject of the invention is also the applications of the improvement according to the invention and of networks of metal wires enabling it to be applied to the power supply of the diode lines of the various panels constituting active lenses allowing electronic scanning of a microwave beam. in the perpendicular plane networks of wires.

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  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Aerials With Secondary Devices (AREA)

Abstract

Perfectionnement au procédé de balayage électronique utilisant des panneaux diélectriques (1,2) dephaseurs comportant des fils (3) à diodes (4,5) permettant de rendre à volonte continus ou discontinus les fils conducteurs (3) sur lequels les diodes (4,5) sont montées. Procédé consistant à perfectionner les réseaux de fils (3,6,7) de ces panneaux (1,2) dans lesquels des fils conducteurs continus (6,7) destinés rendre les panneaux (1,2) adaptés pour une longeuer d'onde déterminée sont utilisés pour alimenter en tension les groupes de diodes (4,5) des fils (3) à diodes. Applications de ce perfectionnement aux lentilles actives permettant le balayage électronique d'un faisceau hyperfréquence dans le plan perpendiculaire aux réseaux de fils (3,6,7).Improvement to the electronic scanning process using dielectric panels (1,2) of phase shifters comprising wires (3) with diodes (4,5) making it possible to continuously or discontinuously conduct the conductive wires (3) on which the diodes (4, 5) are mounted. Method consisting in improving the networks of wires (3,6,7) of these panels (1,2) in which continuous conducting wires (6,7) intended to make the panels (1,2) suitable for a wavelength are used to supply voltage to the diode groups (4,5) of the diode wires (3). Applications of this improvement to active lenses allowing the electronic scanning of a microwave beam in the plane perpendicular to the networks of wires (3,6,7).

Description

Figure imgb0001
v = 50 volts, une tension de 10000 volts.
Figure imgb0001
v = 50 volts, a voltage of 10,000 volts.

De telles valeurs de tension imposant de très fortes isolations entre les différents fils soit du même réseau d'un panneau déphaseur soit entre les fils des réseaux de panneaux déphaseurs adjacents soit entre les fils de commande extérieurs aux panneaux déphaseurs.Such voltage values impose very high insulation between the different wires either from the same network of a phase-shifting panel or between the wires of the networks of adjacent phase-shifting panels or between the control wires outside the phase-shifting panels.

De même ces fortes valeurs de tension rendent très difficile la réalisation des dispositifs d'alimentation qui sont chargés de fournir ces tensions, de les appliquer à tel ou tel fil, et de les couper, en des temps très courts, par exemple (10 microsecondes).Likewise, these high voltage values make it very difficult to produce the supply devices which are responsible for supplying these voltages, for applying them to such and such a wire, and for cutting them, in very short times, for example (10 microseconds ).

Pour éviter ces inconvénients, le demandeur a inventé un procédé d'alimentation de diodes montées sur un fil métallique conducteur destiné à être rendu à volonté continu ou interrompu en tronçons suivant l'état de ces diodes, soit polarisées en direct, soit polarisées en inverse, ce fil à diodes faisant partie des réseaux de fils métalliques constitutifs des panneaux déphaseurs objet des brevets français 2 063 967 et 2 224 887. Ce procédé permet une alimentation sans introduction de fils de commande supplémentaires, permet d'alimenter simultanément toutes les diodes d'un même fil et n'oblige pas à recourir à des tensions d'alimentation très élevées pertubatrices pour le diodes ainsi que pour le circuit de commande extérieur au panneau déphaseur, et qui en outre permet d'augmenter la largeur de la bande de fréquence des ondes d'utilisation du panneau et permet un meilleur contrôle de la valeur du déphasage différentiel entre les deux états du panneau déphaseur suivant que les fils à diodes des réseaux de fils à diodes sont électriquement continus ou tronçonnés.To avoid these drawbacks, the applicant has invented a method of supplying diodes mounted on a conductive metal wire intended to be rendered at will continuous or interrupted in sections according to the state of these diodes, either polarized in direct, or polarized in reverse. , this diode wire forming part of the networks of metallic wires constituting the phase-shifting panels which are the subject of French patents 2 063 967 and 2 224 887. This process allows a supply without the introduction of additional control wires, makes it possible to simultaneously supply all the diodes of '' a single wire and does not require the use of very high supply voltages disturbing for the diodes as well as for the control circuit external to the phase shift panel, and which moreover makes it possible to increase the width of the frequency band of waves of use of the panel and allows a better control of the value of the differential phase shift between the two states of the phase shift panel according to that the wires with dio arrays of diode wires are electrically continuous or sectioned.

Le perfectionnement du procédé de balayage électro- nique selon l'invention consiste à constituer un réseau de fils conducteurs parallèles porteurs de diodes destinées, selon leur état, rendre continus ou coupes ces fils et de fils métalliques continus, parallèles aux fils porteurs de diodes et situés de part et d'autre au fil à diodes, à une meme distance de celui-ci, chacun des fils à diodes étant associé ainsi à deux fils continus qui vent servir à alimenter des groupes de diodes de ce fil à diodes, sur chacun des fils conducteurs porteurs de diodes étant monté un groupe de diodes en série, puis un autre groupe du même nombre de diodes, en série également mais inversées par rapport aux précédentes, et à créer entre les deux fils conducteurs continus qui encadrent le fil à diodes des ponts conducteurs entre chaque point du fil à diodes situé entre deux groupes de diodes de sens différent et alternativement le fil continu situé d'un côté puis de l'autre côté du fil à diodes, de façon que chaque groupe de diodes en série soit alimenté par la tension, à laquelle est porté l'un des deux fils continus encadrant le fil à diodes.The improvement of the electronic scanning method according to the invention consists in constituting a network of parallel conductive wires carrying diodes intended, depending on their condition, to make these wires continuous or cut and of continuous metal wires, parallel to the wires carrying diodes and located on either side of the diode wire, at the same distance from it, each of the diode wires thus being associated with two continuous wires which are used for food ter groups of diodes of this diode wire, on each of the conducting wires carrying diodes being mounted a group of diodes in series, then another group of the same number of diodes, also in series but inverted with respect to the preceding ones, and create between the two continuous conductive wires which surround the diode wire conductive bridges between each point of the diode wire located between two groups of diodes of different directions and alternatively the continuous wire located on one side then on the other side of the wire diodes, so that each group of diodes in series is supplied by the voltage, to which is carried one of the two continuous son framing the diode wire.

On donne ci-après, à titre d'exemple non limitatif la description de l'alimentation des diodes du réseau de fils à diodes constitutif d'un panneau déphaseur en se référant à la figure 1 de la planche unique.A description is given below, by way of nonlimiting example, of the supply of the diodes of the network of diode wires constituting a phase shift panel with reference to FIG. 1 of the single board.

On a constitué à partir de 2 feuilles de (1) stratifié verre-résine polyester .de 0,5 mm d'épaisseur et de 3,6 de constante diélectrique collées sur chaque face d'une feuille de matériau diélectrique en nid d'abeille (2) d'épaisseur g = 22 mm et de constante diélectrique 1,4 un panneau diélectrique carré de 100 x 1000.2 sheets of (1) glass-polyester resin laminate 0.5 mm thick and 3.6 dielectric constant were bonded to each side of a sheet of honeycomb dielectric material. (2) of thickness g = 22 mm and of dielectric constant 1.4 a square dielectric panel of 100 x 1000.

Sur chacune des deux feuilles de stratifié est déposé un réseau de fils métalliques dont le motif répétitif est constitué d'un fil (3) à diodes sur lequel sont monter 8 groupes de 10 diodes identiques (4) et (5) de deux fils continus (6) et (7) situés à la distance (b) de 8 mm de para et d'autre du fil à diodes, d'un fil (8) situé à 12 mm (c) de chaque motif ci-dessus coupé en tronçons égaux de d = 34 mm de longueur séparés par des coupures de (e) 0,3 mm. Toutes les diodes (4) ou (5) sont identiques et montées à un pas constant (a) sur le fil (3) dont le diamètre est 0,4 mm.On each of the two laminate sheets is deposited a network of metallic wires whose repeating pattern consists of a wire (3) with diodes on which are mounted 8 groups of 10 identical diodes (4) and (5) of two continuous wires (6) and (7) located at a distance (b) of 8 mm from each side of the diode wire, from a wire (8) located 12 mm (c) from each motif above cut in equal sections of d = 34 mm in length separated by cuts of (e) 0.3 mm. All the diodes (4) or (5) are identical and mounted at a constant pitch (a) on the wire (3) whose diameter is 0.4 mm.

Toutes les 10 diodes d'un même groupe sont montées dans le même sens, les 10 diodes du groupe suivant sont montées dans le sens opposé au précédent.All 10 diodes of the same group are mounted in the same direction, the 10 diodes of the next group are mounted in the opposite direction to the previous one.

Les deux fils métalliques continus (6) et (7) qui encadrent le fil (3) sont à 8 mm de part et d'autre de

Figure imgb0002
ci, le diamètre des fils (6) et (7) est de 0,22 mm.The two continuous metallic wires (6) and (7) which frame the wire (3) are 8 mm on either side of
Figure imgb0002
ci, the diameter of the wires (6) and (7) is 0.22 mm.

Des brins conducteurs (9) de 0,22 mm de diamètre relient les points du fil (3) situés au début d'un groupe de diodes de même sens au fil (6) des brins conducteurs identiques relient les joints du fil (3) situés à la fin de ces mêmes groupes de diodes au fil (7). Une des extrémités du fil (6) extérieure au panneau est connectée à volonté à une source de tension de 500 volts, l'extrémité du fil (7) associé étant simultanément portée à une tension nulle. De ce fait toutes les diodes (4) et (5) .sont alimentées en inverse sous la tension unitaire moyenne de 50 volts nécessaires à leur blocage. Le fil (3) devient discontinu et coupé en tronçons de longeur unitaire identique définie par le pas des diodes (a).Conductive strands (9) of 0.22 mm in diameter connect the points of the wire (3) located at the start of a group of diodes of the same direction to the wire (6) identical conductive strands connect the joints of the wire (3) located at the end of these same groups of diodes on the wire (7). One end of the wire (6) outside the panel is connected at will to a voltage source of 500 volts, the end of the associated wire (7) being simultaneously brought to zero voltage. Therefore all the diodes (4) and (5). Are supplied in reverse under the average unit voltage of 50 volts necessary for their blocking. The wire (3) becomes discontinuous and cut into sections of identical unit length defined by the pitch of the diodes (a).

A volonté le fil (6) est porté à une tension nulle et le fil (7) à une tension de 5 volts. Toutes les diodes (4) et (5) du fil (1) sont alors alimentées en direct. le fil (3) est continu et parcouru par un courant de deux milli-ampères.At will the wire (6) is brought to a zero voltage and the wire (7) to a voltage of 5 volts. All the diodes (4) and (5) of the wire (1) are then supplied directly. the wire (3) is continuous and traversed by a current of two milli-amps.

Le panneau ainsi constitué est adapté à la transmission des ondes de 3000 mégahertz de fréquence, lorsque les diodes des deux faces du panneau sont dans le même état.The panel thus formed is suitable for the transmission of waves of 3000 megahertz frequency, when the diodes on both sides of the panel are in the same state.

Cette adaptation dans les deux états des diodes résulte, pour un état des diodes de l' écartement et de la constitution des deux feuilles de stratifié (1) réalisés selon la technique dite sandwich et, pour l'autre état des diodes, des positions relatives des différents fils métalliques (3) (6) (7) et (8) et de leur fonction hyperfréquence sur le rayonnement incident, indépendamment de leur rôle d'alimentation en tension ou en courant des diodes.This adaptation in the two states of the diodes results, for a state of the diodes of the spacing and of the constitution of the two laminate sheets (1) produced according to the so-called sandwich technique and, for the other state of the diodes, relative positions different metallic wires (3) (6) (7) and (8) and their microwave function on the incident radiation, independently of their role in supplying voltage or current to the diodes.

Le déphasage différentiel dû aux traversées du panneau par l'onde hyperfréquence de 3000 Mégahertz à polarisation parallèle aux réseaux de fils, pour les deux états des diodes est de 42 degrés et l'atténuation est inférieure à 0,12 décibel.The differential phase shift due to the panel crossing by the 3000 MHz microwave wave with polarization parallel to the arrays of wires, for the two states of the diodes is 42 degrees and the attenuation is less than 0.12 decibel.

Les perfectionnements au procédé d'alimentation de La tension de polarisation des diodes d'un panneau déphaseur hyperfréquence utilisant les réseaux de fils métalliques, Improvements to the method of supplying the bias voltage of the diodes of a microwave phase shifting panel using networks of metal wires,

Figure imgb0003
Figure imgb0003

Il en résulte une très grande simplification des dispositifs extérieurs au panneau de fourniture et de commutation de cette tension. Les isolations électriques entre les différents fils de commande peuvent être réduites dans le rapport des tensions.This results in a very great simplification of the devices external to the panel for supplying and switching this voltage. The electrical insulation between the different control wires can be reduced in the voltage ratio.

Les connexions extérieures au panneau déphaseur concerné peuvent être regroupées d'un même côte de ce panneau. Les fils d'alimentation en tension des groupes de- diodes sont intégrés au panneau et ont également une fonction hyperfréquence améliorant les possibilités d'adaptation du panneau dans une plus grande bande de fréquence. L'invention a également pour objet les applications du perfectionnement selon l'invention et des réseaux de fils métalliques permettant sa mise en oeuvre à l'alimentation des lignes de diodes des différents panneaux constitutifs de lentilles actives permettant le balayage électronique d'un faisceau hyperfréquence dans le plan perpendiculaire réseaux de fils.The external connections to the phase shift panel concerned can be grouped on the same side of this panel. The voltage supply wires of the diode groups are integrated into the panel and also have a microwave function improving the possibilities of adaptation of the panel in a larger frequency band. The subject of the invention is also the applications of the improvement according to the invention and of networks of metal wires enabling it to be applied to the power supply of the diode lines of the various panels constituting active lenses allowing electronic scanning of a microwave beam. in the perpendicular plane networks of wires.

Claims (4)

1. Perfectionnement au procédé de balayage électronique utilisant des panneaux diélectriques déphaseurs comportant des réseaux de fils à diodes caractérisé en ce que l'on utilise des fils conducteurs continus des réseaux destinés essentiellement à l'adaptation des panneaux selon la longueur de l'cnde électromagnétique transmise, pour alimenter en tension par groupe les diodes des fils à diodes.1. Improvement to the electronic scanning process using phase-shifting dielectric panels comprising arrays of diode wires, characterized in that continuous conductive arrays of the arrays intended essentially for adapting the panels according to the length of the electromagnetic wave are used. transmitted, to supply voltage by group the diodes of the diode wires. 2. Perfectionnement au procédé de balayage électronique selon la revendication 1 caractérisé en outre en ce que à chaque fil porteur de diodes sont associés deux fils continus, placés de part et d'autre du fil à diode à une distance telle que l'ensemble des fils conducteurs associés au matériau diélectrique du panneau adapte ce dernier pour la transmission de l'onde de fréquence choisie.2. Improvement to the electronic scanning method according to claim 1 further characterized in that each diode-carrying wire is associated with two continuous wires, placed on either side of the diode wire at a distance such that all of the conductive wires associated with the dielectric material of the panel adapts the latter for the transmission of the wave of selected frequency. 3. Perfectionnement au procédé de balayage électronique selon la revendication 2 caractérisé en outre en de que sur un fil à diodes un groupe de diodes est monté dans un sens, un groupe du même nombre de diodes est monté en sens inverse, chacune des diodes étant alimentée par le fil sur lequel elles sont montées, les groupes de diodes recevant la tension par l'intermédiaire des deux fils continus qui sont associés à ce fil à diodes, grâce à des ponts conducteurs situés à chaque extrémité des groupes de diodes et reliant alternativement l'un de ces deux fils continus au fil à diodes.3. Improvement to the electronic scanning method according to claim 2 further characterized in that on a diode wire a group of diodes is mounted in one direction, a group of the same number of diodes is mounted in opposite directions, each of the diodes being powered by the wire on which they are mounted, the diode groups receiving the voltage via the two continuous wires which are associated with this diode wire, thanks to conductive bridges located at each end of the diode groups and alternately connecting one of these two wires continuous to the diode wire. 4. Perfectionnement au procédé de balayage électronique selon la revendication 3 caractérisé en outre en ce que l'on détermine le nombre de diodes d'un groupe de diodes sur un fil à diodes en fonction de la tension que l'on désire appliquer, des qualités d'isolation réalisées dans et à l'extérieur du panneau entre les différents fils conducteurs et de la section de ces fils.4. Improvement to the electronic scanning method according to claim 3 further characterized in that the number of diodes of a group of diodes is determined on a diode wire as a function of the voltage which it is desired to apply, of the insulation qualities produced in and outside the panel between the various conducting wires and of the section of these wires.
EP78400030A 1977-06-24 1978-06-22 Electronic scanning device comprising dielectric panels as phaseshifters Expired EP0000308B1 (en)

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FR7719365 1977-06-24
FR7719365A FR2395620A1 (en) 1977-06-24 1977-06-24 IMPROVEMENT OF THE ELECTRONIC SWEEPING PROCESS USING DEPHASER DIELECTRIC PANELS

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EP0000308A1 true EP0000308A1 (en) 1979-01-10
EP0000308B1 EP0000308B1 (en) 1983-08-31

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EP (1) EP0000308B1 (en)
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EP0014650B1 (en) * 1979-02-05 1983-05-11 Societe D'etude Du Radant Microwave adaptive spatial filter and its method of use in lowering or suppressing the sidelobes of the radiation pattern of an antenna
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FR2693039B1 (en) * 1981-04-28 1994-09-23 Radant Etudes Microwave spatial attenuator panel.
FR2514203B1 (en) * 1981-10-05 1986-04-25 Radant Etudes MICROWAVE ADAPTIVE SPATIAL FILTER FOR ANY POLARIZED ANTENNA AND METHOD OF IMPLEMENTING SAME
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FR2614419B1 (en) * 1987-04-21 1989-06-16 Centre Nat Rech Scient DEVICE FOR MEASURING, IN A PLURALITY OF POINTS, THE MICROWAVE FIELD DIFFRACTED BY AN OBJECT
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 (en) * 1989-12-26 1993-12-24 Thomson Csf Radant MAGIC MICROWAVE RADIATION SOURCE AND ITS APPLICATION TO AN ELECTRONIC SCANNING ANTENNA.
FR2725077B1 (en) * 1990-11-06 1997-03-28 Thomson Csf Radant BIPOLARIZATION MICROWAVE LENS AND ITS APPLICATION TO AN ELECTRONICALLY SCANNED ANTENNA
FR2786610B1 (en) 1997-02-03 2001-04-27 Thomson Csf ACTIVE MICROWAVE REFLECTOR FOR ELECTRONIC SCANNING ANTENNA
FR2789521A1 (en) 1999-02-05 2000-08-11 Thomson Csf TWO-BAND ELECTRONIC SCANNING ANTENNA WITH ACTIVE MICROWAVE REFLECTOR
FR2801729B1 (en) * 1999-11-26 2007-02-09 Thomson Csf ACTIVE ELECTRONIC SCANNING HYPERFREQUENCY REFLECTOR
FR2807213B1 (en) 2000-03-31 2003-07-25 Thomson Csf HYPERFREQUENCY DEPHASER, AND ELECTRONIC SCAN ANTENNA CONTAINING SUCH DEPHASERS
FR2812457B1 (en) 2000-07-28 2004-05-28 Thomson Csf ACTIVE BI-POLARIZATION MICROWAVE REFLECTOR, ESPECIALLY FOR AN ELECTRONICALLY BALANCED ANTENNA
US7463212B1 (en) 2005-09-14 2008-12-09 Radant Technologies, Inc. Lightweight C-sandwich radome fabrication
US7420523B1 (en) 2005-09-14 2008-09-02 Radant Technologies, Inc. B-sandwich radome fabrication
US9099782B2 (en) 2012-05-29 2015-08-04 Cpi Radant Technologies Division Inc. Lightweight, multiband, high angle sandwich radome structure for millimeter wave frequencies

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FR1329686A (en) * 1962-05-03 1963-06-14 Csf New electrically operated scanning antenna
FR2224887A1 (en) * 1973-04-06 1974-10-31 Bony Gilbert Airborne scanning antenna - phase shifting wire grid and diode switches

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US3213454A (en) * 1960-03-21 1965-10-19 Litton Ind Of Maryland Frequency scanned antenna array
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FR1329686A (en) * 1962-05-03 1963-06-14 Csf New electrically operated scanning antenna
FR2224887A1 (en) * 1973-04-06 1974-10-31 Bony Gilbert Airborne scanning antenna - phase shifting wire grid and diode switches

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0014650B1 (en) * 1979-02-05 1983-05-11 Societe D'etude Du Radant Microwave adaptive spatial filter and its method of use in lowering or suppressing the sidelobes of the radiation pattern of an antenna
FR2469808A1 (en) * 1979-11-13 1981-05-22 Etude Radiant Sarl ELECTRONIC SCANNING DEVICE IN THE POLARIZATION PLAN
WO1981001486A1 (en) * 1979-11-13 1981-05-28 Radant Etudes Electronic scanning device in the biaising plane
GB2462870A (en) * 1981-04-30 2010-03-03 Radant Etudes Method of and device for producing phase-shifts in a beam of microwave electromagnetic waves
GB2462870B (en) * 1981-04-30 2010-07-21 Radant Etudes Method of and device for producing phase-shifts in a beam of microwave electromagnetic waves
GB2300523A (en) * 1983-05-06 1996-11-06 Cmh Sarl Anti-jamming measure
GB2300523B (en) * 1983-05-06 1997-03-19 Cmh Sarl Anti-detection of radar
EP0493255A1 (en) * 1990-12-27 1992-07-01 Thomson-Csf Radant Protection system for a piece of electronic equipment
FR2671194A1 (en) * 1990-12-27 1992-07-03 Thomson Csf Radant SYSTEM FOR PROTECTING ELECTRONIC EQUIPMENT.
US5237328A (en) * 1990-12-27 1993-08-17 Thomson-Csf Radant Protection system for electronic equipment

Also Published As

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DE2862310D1 (en) 1983-10-06
US4212014A (en) 1980-07-08
DE2815452A1 (en) 1979-01-11
FR2395620A1 (en) 1979-01-19
FR2395620B1 (en) 1980-02-29
EP0000308B1 (en) 1983-08-31

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