EP0354076B1 - Antenna with microwave energy distribution across triplate lines - Google Patents
Antenna with microwave energy distribution across triplate lines Download PDFInfo
- Publication number
- EP0354076B1 EP0354076B1 EP89401832A EP89401832A EP0354076B1 EP 0354076 B1 EP0354076 B1 EP 0354076B1 EP 89401832 A EP89401832 A EP 89401832A EP 89401832 A EP89401832 A EP 89401832A EP 0354076 B1 EP0354076 B1 EP 0354076B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- circuits
- circuit
- triplate
- antenna
- distributors
- 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
Links
- 239000004020 conductor Substances 0.000 claims description 19
- 239000003989 dielectric material Substances 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/061—Two dimensional planar arrays
- H01Q21/062—Two dimensional planar arrays using dipole aerials
Definitions
- the present invention relates to an antenna structure comprising microwave energy distribution circuits of the triplate type.
- a known embodiment of the antenna consists in using a plurality of radiating elements distributed in a plane in N rows and M columns, the scanning of the space by the beam of microwave energy thus obtained can be done by rotation mechanical around one or two axes, or by electronically scanning one or two planes, electronically controllable phase shifters then being added to the structure.
- this type of antenna uses a single microwave energy source, it is necessary to distribute this energy, for example first vertically between N horizontal planes, then to distribute it horizontally between the M radiating elements carried by each plane horizontal.
- circuits of the triplate type are generally used, and in particular air triplate circuits in which the dielectric consists of air.
- a stack of N triplate circuits is thus obtained, each distributing the energy to M radiating elements and separated from each other by spacers in order to respect the pitch chosen for the radiating elements in the vertical direction.
- Such an arrangement generally forms a bulky and heavy antenna.
- the production of three-way distribution circuits becomes difficult when their size increases, thus limiting the number M of radiating elements per distributor.
- British patent application GB 2,191,044 describes an antenna capable of transmitting and receiving a circularly polarized wave using crossed dipoles supplied with the aid of triplate circuits.
- the present invention relates to an antenna structure of the previous type in which the drawbacks and limitations are reduced by virtue of the fact that the triplate circuits are arranged so that they have at least part of their ground planes in common, this of course without modifying the steps at which the M x N radiating elements are arranged.
- the subject of the invention is an antenna as defined by claim 1.
- Figure 1 therefore shows a cross section of a block diagram of a circuit of the triplate type.
- This circuit comprises a central conductor 4, kept at a substantially constant distance from two conductive planes 1 and 2, which behave like short circuits and which are called ground planes.
- the central conductor is separated from the ground planes by a dielectric 3 which can be constituted by air.
- a triplate circuit also includes mechanical support means for the central conductor, not shown in this figure.
- FIG. 2 represents a top view of a triplate distribution circuit capable of being used in the antenna according to the invention.
- the diagram in FIG. 2 being a top view, only a ground plane is visible, marked 11.
- the triplate circuit is for example substantially rectangular, its central conductor (not visible) receiving, for example on one of the long sides from the rectangle, marked 12, the energy coming from distribution means R (for example along the vertical axis), via a coupler and, when an electronic scan is carried out in the vertical plane, a phase shifter, for distributing it in the horizontal plane (according to the previous example) with M radiating elements, for example of the dipole type, marked D1, D2 Across D M , arranged on the other long side of the rectangle, marked 13.
- the dipoles D each consist of two superimposed half-dipoles which constitute an extension of each of the ground planes, only the upper half-dipole being visible and marked 10, and by a half-dipole marked 40, which is an extension of the central conductor.
- the dipoles are regularly arranged on the side 12, at a pitch denoted p M.
- the ground planes consist of aluminum sheets and the central conductor, of copper ribbons.
- the three-ply structure can be mechanically reinforced by foam, placed between the central conductor and the ground planes.
- FIG. 2 also shows a plurality of junctions J D , arranged for example in notches made in the side 13, ensuring the connection between several triplate circuits, the precise constitution and the function, in some embodiments, are described in more detail below.
- the distributor R is also constituted by a triplate circuit, arranged for example as shown in the figure on the side 13, normally in the plane of the distributor triplate, the electrical connection between the two triplate circuits can be carried out using a J R junction on one of the short sides of the rectangle, similar to the previous J D junction.
- FIG. 3 represents a first embodiment, seen in partial section in the vertical plane, of the antenna according to the invention.
- triplate distribution circuits T D seen in section, separated and held by spacers 8.
- Each of the distribution circuits T D consists of two triplate circuits, marked T1 and T2, superimposed.
- the first of these circuits, T1 carries the dipoles D produced in the extension of the circuit T1 as shown in FIG. 2, and part of the microwave circuits necessary for distribution.
- the other triplate circuit, T2 carries the rest of the distribution circuits. It is arranged parallel to the triplate circuit T1 so as to have in common with it one of its ground planes, the plane 12 in the example shown, and it is then further constituted by a second ground plane, marked 14 and a central conductor, identified 13.
- the circuits T1 and T2 are fixed in a vertical support 3 at the rear of the antenna.
- a conducting plane 9 forming a reflector for the dipoles.
- the microwave energy supplied to the distributor R is distributed to the different (N) distributor circuits via couplers and, where appropriate, phase shifters; the energy supplied to each of the distributor circuits is distributed to the M dipoles carried by each of these circuits.
- the term “distribution” is used for the division of energy between the source and the (N) horizontal planes, and that the term “distribution” is used at the 'inside the horizontal planes, between the different (M) radiating elements.
- Such a structure therefore makes it possible to reduce the thickness of the antenna (between front face and rear face), as well as its weight due to the reduction in the number of ground planes.
- FIG. 4 represents an embodiment of a junction J D between two triplate circuits T1 and T2 forming the same distributor circuit T D.
- FIG 4 there is shown the rear face of the circuits T2 and T2.
- the circuit T1 always includes the ground plane 11, its central conductor identified 10, shown in dotted lines and the ground plane 12 which it has in common with the circuit T2, whose central conductor is identified 13 and the second ground plane 14.
- the junction J D between the two triplate circuits is constituted by a micro-ribbon type circuit, that is to say comprising a ground plane 5 and a ribbon-shaped conductor 6 arranged parallel to the ground plane and separated from the latter by a dielectric material 7.
- the circuit J D is placed on the rear face of the circuits T1 and T2.
- the central conductors 10 and 13 of the two triplates T1 and T2 are each provided with a tongue extending outside the circuit, crossing the ground plane 5 (without electrical contact with it) and the dielectric 7, so as to come into electrical contact with the conductor 6.
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
Description
La présente invention a pour objet une structure d'antenne comportant des circuits de distribution d'énergie micro-onde du type triplaque.The present invention relates to an antenna structure comprising microwave energy distribution circuits of the triplate type.
Un mode de réalisation connu d'antenne consiste à utiliser une pluralité d'éléments rayonnants répartis dans un plan en N lignes et M colonnes, le balayage de l'espace par le faisceau d'énergie micro-onde ainsi obtenu pouvant se faire par rotation mécanique autour d'un ou deux axes, ou encore par balayage électronique un ou deux plans, des déphaseurs électroniquement commandables étant alors ajoutés à la structure.A known embodiment of the antenna consists in using a plurality of radiating elements distributed in a plane in N rows and M columns, the scanning of the space by the beam of microwave energy thus obtained can be done by rotation mechanical around one or two axes, or by electronically scanning one or two planes, electronically controllable phase shifters then being added to the structure.
Lorsque ce type d'antenne utilise une source d'énergie micro-onde unique, il est nécessaire de répartir cette énergie, par exemple d'abord verticalement entre N plans horizontaux, puis de la distribuer horizontalement entre les M éléments rayonnants portés par chaque plan horizontal.When this type of antenna uses a single microwave energy source, it is necessary to distribute this energy, for example first vertically between N horizontal planes, then to distribute it horizontally between the M radiating elements carried by each plane horizontal.
Une telle distribution d'énergie devant se faire avec un minimum de pertes, on utilise en général des circuits du type triplaque, et notamment des circuits triplaques à air dans lesquels le diélectrique est constitué par de l'air.Since such an energy distribution must be done with a minimum of losses, circuits of the triplate type are generally used, and in particular air triplate circuits in which the dielectric consists of air.
On obtient ainsi un empilement de N circuits triplaques, distribuant chacun l'énergie à M éléments rayonnants et séparés les uns des autres par des entretoises pour respecter le pas choisi pour les éléments rayonnants dans la direction verticale.A stack of N triplate circuits is thus obtained, each distributing the energy to M radiating elements and separated from each other by spacers in order to respect the pitch chosen for the radiating elements in the vertical direction.
Un tel arrangement forme en général une antenne encombrante et lourde. En outre, la réalisation des circuits triplaques de distribution devient délicate lorsque leur taille augmente, limitant ainsi le nombre M d'éléments rayonnants par distributeur.Such an arrangement generally forms a bulky and heavy antenna. In addition, the production of three-way distribution circuits becomes difficult when their size increases, thus limiting the number M of radiating elements per distributor.
La demande de brevet britannique GB 2.191.044 décrit une antenne pouvant émettre et recevoir une onde polarisée circulairement à l'aide de dipôles croisés alimentés à l'aide de circuits triplaques.British patent application GB 2,191,044 describes an antenna capable of transmitting and receiving a circularly polarized wave using crossed dipoles supplied with the aid of triplate circuits.
La présente invention a pour objet une structure d'antenne du type précédent dans laquelle les inconvénients et limitations sont réduits grâce au fait que les circuits triplaques sont disposés de sorte qu'ils aient au moins une partie de leurs plans de masse en commun, cela bien entendu sans que soient modifiés les pas auxquels sont disposés les M x N éléments rayonnants.The present invention relates to an antenna structure of the previous type in which the drawbacks and limitations are reduced by virtue of the fact that the triplate circuits are arranged so that they have at least part of their ground planes in common, this of course without modifying the steps at which the M x N radiating elements are arranged.
Plus précisément, l'invention a pour objet une antenne telle que définie par la revendication 1.More specifically, the subject of the invention is an antenna as defined by claim 1.
D'autres objets, particularités et résultats de l'invention ressortiront de la description suivante, illustrée par les dessins annexés, qui représentent :
- la figure 1, une coupe transversale d'un circuit triplaque ;
- la figure 2, une vue de dessus d'un mode de réalisation d'un circuit de distribution triplaque utilisé dans l'antenne selon l'invention ;
- la figure 3, une vue en coupe partielle d'un premier mode de réalisation de l'antenne selon l'invention ;
- la figure 4, un mode de réalisation d'une jonction entre deux circuits triplaques utilisés dans l'antenne selon l'invention.
- Figure 1, a cross section of a triplate circuit;
- FIG. 2, a top view of an embodiment of a three-plate distribution circuit used in the antenna according to the invention;
- Figure 3, a partial sectional view of a first embodiment of the antenna according to the invention;
- Figure 4, an embodiment of a junction between two triplate circuits used in the antenna according to the invention.
Sur ces différentes figures, les mêmes références se rapportent aux mêmes éléments.In these different figures, the same references relate to the same elements.
La figure 1 représente donc une coupe transversale d'un schéma de principe d'un circuit du type triplaque.Figure 1 therefore shows a cross section of a block diagram of a circuit of the triplate type.
Ce circuit comporte un conducteur central 4, maintenu à distance sensiblement constante de deux plans conducteurs 1 et 2, qui se comportent comme des court-circuits et qui sont appelés plans de masse. Le conducteur central est séparé des plans de masse par un diélectrique 3 qui peut être constitué par de l'air. Un circuit triplaque comporte encore des moyens de supports mécaniques du conducteur central, non représentés sur cette figure.This circuit comprises a central conductor 4, kept at a substantially constant distance from two
La figure 2 représente une vue de dessus d'un circuit triplaque de distribution susceptible d'être utilisé dans l'antenne selon l'invention.FIG. 2 represents a top view of a triplate distribution circuit capable of being used in the antenna according to the invention.
Le schéma de la figure 2 étant une vue de dessus, seul est visible un plan de masse, repéré 11. Le circuit triplaque est par exemple sensiblement rectangulaire, son conducteur central (non visible) recevant, par exemple sur l'un des grands côtés du rectangle, repéré 12, l'énergie provenant de moyens R de répartition (par exemple selon l'axe vertical), via un coupleur et, lorsqu'on effectue un balayage électronique dans le plan vertical, un déphaseur, pour la distribuer dans le plan horizontal (selon l'exemple précédent) à M éléments rayonnants, par exemple du type dipôle, repérés D₁, D₂ ..... DM, disposés sur l'autre grand côté du rectangle, repéré 13 .The diagram in FIG. 2 being a top view, only a ground plane is visible, marked 11. The triplate circuit is for example substantially rectangular, its central conductor (not visible) receiving, for example on one of the long sides from the rectangle, marked 12, the energy coming from distribution means R (for example along the vertical axis), via a coupler and, when an electronic scan is carried out in the vertical plane, a phase shifter, for distributing it in the horizontal plane (according to the previous example) with M radiating elements, for example of the dipole type, marked D₁, D₂ ..... D M , arranged on the other long side of the rectangle, marked 13.
Plus précisément, dans ce mode de réalisation, les dipôles D sont constitués chacun par deux demi-dipôles superposés qui constituent un prolongement de chacun des plans de masse, seul le demi-dipôle supérieur étant visible et repéré 10, et par un demi-dipôle repéré 40, qui est le prolongement du conducteur central. Les dipôles sont disposés régulièrement sur le côté 12, à un pas noté pM. A titre d'exemple, les plans de masse sont constitués par des feuilles d'aluminium et le conducteur central, par des rubans de cuivre. Au niveau des dipôles, la structure triplaque peut être mécaniquement renforcée par de la mousse, disposée entre conducteur central et plans de masse.More specifically, in this embodiment, the dipoles D each consist of two superimposed half-dipoles which constitute an extension of each of the ground planes, only the upper half-dipole being visible and marked 10, and by a half-dipole marked 40, which is an extension of the central conductor. The dipoles are regularly arranged on the
On a encore représenté sur la figure 2 une pluralité de jonctions JD, disposées par exemple dans des encoches pratiquées dans le côté 13, assurant la connexion entre plusieurs circuits triplaques, dont la constitution précise et la fonction, dans certains modes de réalisation, sont décrites plus en détail ci-après.FIG. 2 also shows a plurality of junctions J D , arranged for example in notches made in the
Dans le cas où le répartiteur R est constitué également par un circuit triplaque, disposé par exemple comme représenté sur la figure sur le côté 13, normalement au plan du triplaque distributeur, la liaison électrique entre les deux circuits triplaques peut être effectuée à l'aide d'une jonction JR sur l'un des petits côtés du rectangle, analogue à la jonction JD précédente.In the case where the distributor R is also constituted by a triplate circuit, arranged for example as shown in the figure on the
La figure 3 représente un premier mode de réalisation, vu en coupe partielle dans le plan vertical, de l'antenne selon l'invention.FIG. 3 represents a first embodiment, seen in partial section in the vertical plane, of the antenna according to the invention.
Sur cette figure, on a représenté cinq circuits triplaques de distribution TD vus en coupe, séparés et maintenus par des entretoises 8. Chacun des circuits de distribution TD est constitué de deux circuits triplaques, repérés T₁ et T₂, superposés .In this figure, there are shown five triplate distribution circuits T D seen in section, separated and held by
Le premier de ces circuits, T₁, porte les dipôles D réalisés dans le prolongement du circuit T₁ comme représenté figure 2, et une partie des circuits micro-onde nécessaires à la distribution. L'autre circuit triplaque, T₂, porte le reste des circuits de distribution. Il est disposé parallèlement au circuit triplaque T₁ de façon à avoir en commun avec lui un de ses plans de masse, le plan 12 dans l'exemple représenté, et il est alors constitué en outre par un deuxième plan de masse, repéré 14 et un conducteur central, repéré 13. Les circuits T₁ et T₂ sont fixés dans un support vertical 3 à l'arrière de l'antenne.The first of these circuits, T₁, carries the dipoles D produced in the extension of the circuit T₁ as shown in FIG. 2, and part of the microwave circuits necessary for distribution. The other triplate circuit, T₂, carries the rest of the distribution circuits. It is arranged parallel to the triplate circuit T₁ so as to have in common with it one of its ground planes, the
Sur la partie avant de l'antenne, derrière les dipôles D, est fixé classiquement un plan conducteur 9 formant réflecteur pour les dipôles.On the front part of the antenna, behind the dipoles D, is conventionally fixed a conducting
De la sorte, comme exposé plus haut, l'énergie micro-onde fournie au répartiteur R est répartie aux différents (N) circuits distributeurs via coupleurs et, le cas échéant, déphaseurs ; l'énergie fournie à chacun des circuits distributeurs est distribuée aux M dipôles que portent chacun de ces circuits.In this way, as explained above, the microwave energy supplied to the distributor R is distributed to the different (N) distributor circuits via couplers and, where appropriate, phase shifters; the energy supplied to each of the distributor circuits is distributed to the M dipoles carried by each of these circuits.
Il est à noter que, dans la présente description, le terme de "répartition" est utilisé pour la division de l'énergie entre la source et les (N) plans horizontaux, et que le terme de "distribution" l'est à l'intérieur des plans horizontaux, entre les différents (M) éléments rayonnants.It should be noted that, in the present description, the term "distribution" is used for the division of energy between the source and the (N) horizontal planes, and that the term "distribution" is used at the 'inside the horizontal planes, between the different (M) radiating elements.
Il est à noter en outre que la description du fonctionnement et les termes utilisés correspondent au fonctionnement à l'émission, mais que l'antenne fonctionne, de façon réciproque, également à la réception.It should also be noted that the description of the operation and the terms used correspond to the operation on transmission, but that the antenna operates, reciprocally, also on reception.
Une telle structure permet donc de réduire l'épaisseur de l'antenne (entre face avant et face arrière), ainsi que son poids du fait de la diminution du nombre de plans de masse.Such a structure therefore makes it possible to reduce the thickness of the antenna (between front face and rear face), as well as its weight due to the reduction in the number of ground planes.
La figure 4 représente un mode de réalisation d'une jonction JD entre deux circuits triplaques T₁ et T₂ formant un même circuit distributeur TD.FIG. 4 represents an embodiment of a junction J D between two triplate circuits T₁ and T₂ forming the same distributor circuit T D.
Sur la figure 4, on a représenté la face arrière des circuits T₁ et T₂. Le circuit T₁ comporte toujours le plan de masse 11, son conducteur central repéré 10, représenté en pointillés et le plan de masse 12 qu'il a en commun avec le circuit T₂, dont le conducteur central est repéré 13 et le deuxième plan de masse 14.In Figure 4, there is shown the rear face of the circuits T₂ and T₂. The circuit T₁ always includes the
La jonction JD entre les deux circuits triplaques est constituée par un circuit du type micro-ruban, c'est-à-dire comportant un plan de masse 5 et un conducteur 6 en forme de ruban disposé parallèlement au plan de masse et séparé de celui-ci par un matériau diélectrique 7. Le circuit JD est placé sur la face arrière des circuits T₁ et T₂. Les conducteurs centraux 10 et 13 des deux triplaques T₁ et T₂ sont munis chacun d'une languette s'étendant à l'extérieur du circuit, traversant le plan de masse 5 (sans contact électrique avec lui) et le diélectrique 7, de façon à venir en contact électrique avec le conducteur 6.The junction J D between the two triplate circuits is constituted by a micro-ribbon type circuit, that is to say comprising a
Une telle jonction est décrite dans la demande de brevet français n° 2.612.697 au nom de THOMSON-CSF.Such a junction is described in French patent application No. 2,612,697 in the name of THOMSON-CSF.
La description ci-dessus a été bien entendu faite à titre d'exemple non limitatif. C'est ainsi notamment que l'on a décrit une antenne assurant un balayage mécanique dans le plan horizontal, mais que ce plan peut être vertical.The above description has of course been given by way of nonlimiting example. Thus, in particular, an antenna has been described providing mechanical scanning in the horizontal plane, but this plane may be vertical.
Claims (4)
- Electronic scanning antenna including:- a splitter (R) connected to a transmitter or a receiver of microwave radiated energy, splitting the energy among N distributors;- N distributors (TD), each distributing the energy which it receives among M radiating elements, and produced in the form of triplate stripline circuits, each of the triplate stripline circuits including a central conductor and two earth planes arranged on either side of the central conductor, substantially parallel to the latter and separated from the central conductor by a dielectric material;- MxN radiating elements (D);the antenna being characterized in that each of the distributors (TD) is produced by two superposed triplate stripline circuits (T₁, T₂), the first circuit (T1) bearing the radiating elements (D) arranged in the extension thereof and the second circuit (T2) being connected to the splitter (R), these two circuits having a common earth plane, in that the distributors (TD) are arranged so as to be parallel to one another and in that each of the distributors (TD) furthermore includes at least one junction (JD) forming the connection between the central conductors of its two triplate stripline circuits.
- Antenna according to Claim 1, characterized in that the junction of each distributor consists of a circuit of the microstrip type, including an earth plane (5) and a strip-shaped conductor (6) separated from the earth plane by a dielectric material (7), each of the central conductors of the stripline circuits being provided with a tongue, passing through the earth plane and the dielectric of the microstrip circuit, without electrically contacting the earth plane of the microstrip circuit, so as to come into electrical contact with the strip.
- Antenna according to one of the preceding claims, characterized in that the dielectric material of the triplate stripline circuits consists of air.
- Antenna according to one of the preceding claims, characterized in that the radiating elements are of the dipole type.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8809545 | 1988-07-13 | ||
| FR8809545A FR2634325B1 (en) | 1988-07-13 | 1988-07-13 | ANTENNA COMPRISING TRIPLATE TYPE MICROWAVE ENERGY DISTRIBUTION CIRCUITS |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0354076A1 EP0354076A1 (en) | 1990-02-07 |
| EP0354076B1 true EP0354076B1 (en) | 1995-12-06 |
Family
ID=9368421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP89401832A Expired - Lifetime EP0354076B1 (en) | 1988-07-13 | 1989-06-27 | Antenna with microwave energy distribution across triplate lines |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US5153602A (en) |
| EP (1) | EP0354076B1 (en) |
| DE (1) | DE68925005T2 (en) |
| FR (1) | FR2634325B1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6097260A (en) * | 1998-01-22 | 2000-08-01 | Harris Corporation | Distributed ground pads for shielding cross-overs of mutually overlapping stripline signal transmission networks |
| US6130585A (en) * | 1998-01-22 | 2000-10-10 | Harris Corporation | Cross-over distribution scheme for canceling mutually coupled signals between adjacent stripline signal distribution networks |
| US6028494A (en) * | 1998-01-22 | 2000-02-22 | Harris Corporation | High isolation cross-over for canceling mutually coupled signals between adjacent stripline signal distribution networks |
| FR2807213B1 (en) | 2000-03-31 | 2003-07-25 | Thomson Csf | HYPERFREQUENCY DEPHASER, AND ELECTRONIC SCAN ANTENNA CONTAINING SUCH DEPHASERS |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2411872A (en) * | 1942-06-11 | 1946-12-03 | Bell Telephone Labor Inc | Microwave directive antenna |
| US3623112A (en) * | 1969-12-19 | 1971-11-23 | Bendix Corp | Combined dipole and waveguide radiator for phased antenna array |
| GB1387450A (en) * | 1972-07-14 | 1975-03-19 | Marconi Co Ltd | Dipole aerial arrangements |
| US3845490A (en) * | 1973-05-03 | 1974-10-29 | Gen Electric | Stripline slotted balun dipole antenna |
| US4353072A (en) * | 1980-11-24 | 1982-10-05 | Raytheon Company | Circularly polarized radio frequency antenna |
| GB2111310B (en) * | 1981-11-27 | 1985-07-03 | Marconi Co Ltd | Antenna array |
| GB2113476B (en) * | 1982-01-15 | 1985-07-03 | Marconi Co Ltd | Antenna arrangement |
| GB2191044B (en) * | 1986-05-28 | 1989-12-13 | Gen Electric Plc | Antenna arrangement |
-
1988
- 1988-07-13 FR FR8809545A patent/FR2634325B1/en not_active Expired - Lifetime
-
1989
- 1989-06-27 EP EP89401832A patent/EP0354076B1/en not_active Expired - Lifetime
- 1989-06-27 DE DE68925005T patent/DE68925005T2/en not_active Expired - Fee Related
- 1989-07-06 US US07/376,001 patent/US5153602A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| FR2634325B1 (en) | 1990-09-14 |
| EP0354076A1 (en) | 1990-02-07 |
| FR2634325A1 (en) | 1990-01-19 |
| DE68925005D1 (en) | 1996-01-18 |
| US5153602A (en) | 1992-10-06 |
| DE68925005T2 (en) | 1996-05-09 |
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