EP0888648B1 - Antenne helicoidale a moyens de duplexage integres, et procedes de fabrication correspondants - Google Patents
Antenne helicoidale a moyens de duplexage integres, et procedes de fabrication correspondants Download PDFInfo
- Publication number
- EP0888648B1 EP0888648B1 EP97914395A EP97914395A EP0888648B1 EP 0888648 B1 EP0888648 B1 EP 0888648B1 EP 97914395 A EP97914395 A EP 97914395A EP 97914395 A EP97914395 A EP 97914395A EP 0888648 B1 EP0888648 B1 EP 0888648B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- antenna
- feed
- strands
- elements
- replaced
- 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
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P5/00—Coupling devices of the waveguide type
- H01P5/12—Coupling devices having more than two ports
- H01P5/16—Conjugate devices, i.e. devices having at least one port decoupled from one other port
- H01P5/19—Conjugate devices, i.e. devices having at least one port decoupled from one other port of the junction type
- H01P5/22—Hybrid ring junctions
- H01P5/227—90° branch line couplers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P5/00—Coupling devices of the waveguide type
- H01P5/12—Coupling devices having more than two ports
- H01P5/16—Conjugate devices, i.e. devices having at least one port decoupled from one other port
- H01P5/19—Conjugate devices, i.e. devices having at least one port decoupled from one other port of the junction type
- H01P5/22—Hybrid ring junctions
- H01P5/222—180° rat race hybrid rings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q11/00—Electrically-long antennas having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements
- H01Q11/02—Non-resonant antennas, e.g. travelling-wave antenna
- H01Q11/08—Helical antennas
Definitions
- the field of the invention is that of wide bandwidth antennas and hemispherical or quasi-hemispherical radiation pattern. More precisely, the invention relates to resonant helical antennas operating in two bands of neighboring frequencies corresponding to transmission and reception, and in particular the decoupling of these two channels, and therefore the duplexer function.
- the antenna of the invention finds applications in particular in the context of mobile satellite communications between fixed users and all types of mobiles, for example aeronautical, maritime or terrestrial.
- mobile satellite communications between fixed users and all types of mobiles, for example aeronautical, maritime or terrestrial.
- systems in this area communication systems are implemented, or are currently being development (e.g. INMARSAT, INMARSAT-M systems, Globalstar ).
- These antennas are also of interest in the deployment personal communication systems (PCS) by geostationary satellites.
- PCS personal communication systems
- the invention can find applications in all systems requiring the use of a wide band, a cover diagram hemispherical, circular polarization and a good ellipticity ratio.
- the antennas must indeed have the above characteristics either in a very wide bandwidth, around 10%, ie in two neighboring sub-bands corresponding respectively to the reception and broadcast.
- This antenna called the resonant quadrifilar helix antenna (HQR)
- HQR resonant quadrifilar helix antenna
- a quadrifilar antenna is formed by four radiating strands.
- An example of realization is described in detail in the document "Analysis of quadrifilar resonant helical antenna for mobile communications "(analysis of the resonant quadrifilar helix antenna for communications with mobiles), by A. Sharaiha and C. Terret (IEEE - Proceedings H, vol. 140, no.4, August 1993).
- the radiating strands are printed on a substrate thin dielectric, then wound on a transparent cylindrical support of the radio point of view.
- the four strands of the propeller are open or short-circuited one end and electrically connected at the other end with segments conductors arranged on the base of the lower part of the support cylinder.
- the fourth strands of the helix are therefore excited through these conductive segments.
- This antenna conventionally requires a supply circuit, which ensures the excitation of the different antenna strands by signals of the same amplitude in phase quadrature.
- Several techniques are known for making such circuits Power.
- This technique has the advantage of being relatively simple to carry out and to put in action. On the other hand, it leads to a not insignificant bulk, compared to the size of the antenna (which can for example have a size of the order of ten centimeters). This drawback makes this solution incompatible with many applications, especially when maximum miniaturization is required.
- each two-wire propeller can be powered by a coaxial balun of the so-called "balun” type folded ".
- the two two-wire are then excited in phase quadrature using a hybrid coupler.
- balun / adapter assembly used for this type of antennas (made for example from a coaxial section, the core and sheath form dipole) is complex and bulky.
- this type of assembly has the disadvantage of forming a kind of band pass filter still too narrow.
- This technique eliminates hybrid couplers. It presents in however the disadvantage of requiring a delicate adjustment of the length of the strands. Moreover, the antenna is no longer symmetrical, and production will be more complex. Furthermore, this method remains specifically reserved for systems using a band of close operation.
- duplexer This is the role of the duplexer, usually placed at the power point of the antenna.
- duplexers Several types are known.
- the document “RF filters and Diplexers for Cellular Applications” by Gord Neilson and John Mchory (Antem'90) thus present various types of duplexers used in the field of radiocommunication.
- duplexers act as filters, and can therefore introduce loss of useful signal parts.
- the invention particularly aims to overcome these various disadvantages of the state of technique.
- an objective of the invention is to provide an antenna and its power system (thereafter, the term “antenna” includes the antenna itself and its power system) which has two sub-bands which are sufficiently decoupled so as not to require the presence of a conventional additional duplexer.
- the invention aims to provide an antenna bidirectional ensuring simple and efficient duplexing function, without call to known duplexers.
- Another objective of the invention is to provide such an antenna, which is of a cost cost of little importance, and easily achievable industrially.
- the invention aims to provide such an antenna, which can be manufactured in a very small number of successive operations.
- Another object of the invention is also to provide such an antenna, which does not requires specific and complex adjustments.
- Yet another objective of the invention is to provide such an antenna (and including its power system), which is compact, compared to to known devices.
- the invention also aims to provide such an antenna, which provides a excitation equiamplitude of the four strands and a law in exact phase quadrature, and therefore a good quality of circular polarization, in the two sub-bands.
- a helical antenna with integrated duplexing means comprising two decoupled coaxial propellers, each formed of radiating strands printed on a substrate, each of said helices being associated with a structure independent and miniaturized broadband feed of said radiating strands, said supply structures being printed on said corresponding substrate and comprising at least one hybrid coupler made from semi-localized elements, so as to reduce the dimensions.
- Realization of antenna strands and supply of printed elements allows the antenna, its power supply and the duplexer to be produced in a single operation, without specific connection means, and in a particularly reduced format.
- hybrid couplers made from semi-localized elements allows to obtain all the desired qualities, and in particular to reduce the overall size of the assembly, compared to the conventionally used lines.
- each of said coaxial helices being perfectly decoupled, this structure directly plays the role of duplexer, without any element additional.
- the feed points of each of the propellers correspond respectively and directly to the transmit signal and the receive signal.
- said propellers have, when they are laid flat, strands having directions symmetrical with respect to the axis of said antenna, and are wound in opposite winding directions, so that said strands are substantially parallel.
- This technique allows the printed side of the internal propeller to face inside, and that of the external propeller towards the outside.
- the excitation points of each of said quadrifilar propellers are offset with respect to each other, in a plane perpendicular to the axis of said propellers. According to an advantageous embodiment, they are offset by 135 °.
- said propeller is a quadrifilar propeller, formed of four radiating strands supplied by a supply structure comprising three couplers hybrids.
- said supply structure includes a first 180 ° hybrid coupler combining an input and / or output supplying said antenna with two phase-shifted outputs and / or intermediate inputs of 180 °, and two 90 ° hybrid couplers each associating one of said outputs and / or intermediate inputs of said first hybrid coupler at one end of two said radiating strands.
- said antenna is mounted on a support having first and second separate parts having different permittivities, said first part carrying said radiating strands and said second part carrying said supply structure.
- said first part carrying the antenna strands has a permittivity greater than 1.
- An antenna as described above can be used alone, or in a network antennas.
- the invention also relates to the manufacture of such antennas, which turns out particularly simplified, compared to known techniques.
- the invention therefore relates to an antenna with a broadband feed system and integrated duplexer, produced using a simple manufacturing technique and presenting a low cost.
- the invention can be applied to any type of antenna in propellers.
- the preferred embodiment described above relates to an antenna with quadrifilar propellers.
- the antenna therefore has two coaxial propellers ensuring transmission and reception respectively.
- Each of these propellers is made up of four strands printed on a substrate, on which a structure is jointly printed Power.
- the antenna functions are implemented, feeder and duplexer. This makes it possible to obtain a very compact antenna, and at cost very low cost.
- Figure 1 illustrates the printed elements, when developed flat.
- it includes four radiating antenna strands 11 1 to 11 4 .
- They are for example made of copper, on a thin dielectric substrate, such as kapton ( ⁇ r ⁇ 3.8).
- the four strands 11 1 to 11 4 are preferably open at their upper end 15 1 to 15 4 . They can also be short-circuited. However, the system of the invention is particularly suitable for the excitation of antennas with more open strands which, for equal performance, have smaller dimensions than the antennas with short-circuited strands.
- the other end 16 1 to 16 4 of the strands is connected to the feed lines of the supply circuit.
- the supply system is produced on the same substrate, as an extension of the antenna. It is made up of three hybrid couplers 12, 13 and 14 designed in elements semi-localized.
- the first hybrid coupler 12 is connected on the one hand to the input (respectively output depending on use) 17 signal from the antenna, and the other at the two inputs (respectively outputs) 18 and 19 of the two other couplers 13 and 14. It is a 180 ° hybrid coupler.
- the hybrid couplers 13 and 14 are two identical 90 ° couplers. They are connected on the one hand to the input 18 (respectively 19) and on the other hand to the end of the strands 16 1 and 16 2 (respectively 16 3 and 16 4 ).
- the four strands are supplied in perfect phase quadrature, on a broadband.
- the cylindrical support is a transparent support from the radioelectric point of view, that is to say having a permittivity close to 1.
- FIG. 3 illustrates the elements forming the internal layer of the antenna, shown flat. These elements are quite similar to those described in connection with FIG. 1, except that the antenna strands 51 1 to 51 4 are inclined in the opposite direction, the winding direction 52 being opposite to the winding direction 17 of the first propeller.
- the dielectric substrate is identical to the first.
- the system power supply 53 is also in the extension of the antenna strands 511 and 514 and is made of semi-localized elements.
- the assembly is then wound inwards (arrow 52) on a support radio-transparent, to provide the internal helix of Figure 4.
- the 90 ° couplers 13 and 14 each consist of 4 wide elements 31 1 and 31 4 , connected 2 to 2 by 4 lines of small width 32 1 to 32 4 .
- the 190 ° coupler includes 6 wide elements 331 to 336 connected by 6 narrow lines 34 1 to 34 6 .
- Figures 7A and 7C illustrate the design of a -3 dB 90 ° coupler.
- FIG. 7A presents a conventional diagram of a -3 dB 90 ° coupler in elements distributed. It includes two sections of line 81, 82 of length ⁇ g / 4 and of impedance characteristic Zc, and two sections of line 83, 84 of length ⁇ g / 4, and of impedance Z c / ⁇ 2.
- Figures 10 and 11 relate to the radiation patterns measured in right circular polarization (a) and left circular polarization (6), with a dipole operating respectively at 1.98 GHz ( Figure 10) and 2.2 GHz ( Figure 11) frequencies.
- Figure 12 shows that the decoupling between the two propellers is greater than 20 dB.
- An antenna according to the invention can be produced in several ways.
- the propellers can be printed at flat, as illustrated in FIGS. 1 and 3. They are then rolled up on a support for form the antenna (figures 2 and 4).
- the substrate intended for receive the printed elements can be made directly in its cylindrical shape final.
- the printing of the strands and the feeding structure is carried out directly on the cylinder.
- the antenna the invention advantageously lends itself to the production of antenna arrays.
Landscapes
- Details Of Aerials (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Support Of Aerials (AREA)
Description
- impression sur un substrat plan d'au moins deux brins rayonnants, destinés à former une hélice, et d'une structure indépendante d'alimentation miniaturisée large bande desdits brins rayonnants comprenant au moins un coupleur hybride réalisé à partir d'éléments semi-localisés, de façon à en réduire les dimensions ;
- enroulement dudit substrat autour d'un support cylindrique.
- obtention d'un support cylindrique portant un substrat ;
- impression sur ledit substrat d'au moins deux brins rayonnants, destinés à former une hélice, et d'une structure indépendante d'alimentation miniaturisée large bande desdits brins rayonnants comprenant au moins un coupleur hybride réalisé à partir d'éléments serai-localisés, de façon à en réduire les dimensions.
- la figure 1 illustre un exemple d'hélice quadrifilaire à alimentation intégrée selon l'invention, formant la couche externe de l'antenne, développée à plat;
- la figure 2 présente l'hélice de la figure 1, enroulée cylindriquement, de façon à former une première hélice opérationnelle ;
- la figure 3 illustre une seconde hélice quadrifilaire à alimentation intégrée selon l'invention formant la couche interne de l'antenne, développée à plat;
- la figure 4 présente l'hélice de la figure 3, enroulée cylindriquement, de façon à former une seconde hélice opérationnelle ;
- la figure 5 présente une vue en coupe de l'antenne montée, comprenant les hélices des figures 2 et 4, montées en décalage ;
- la figure 6 présente de façon plus détaillée la structure d'alimentation des figures 1 et 3 ;
- les figures 7A à 7C illustrent la conception d'un coupleur -3 dB 90° selon
l'invention :
- figure 7A : coupleur classique en éléments distribués ;
- figure 7B : représentation correspondante à l'aide de cellules en π ;
- figure 7C : coupleur en lignes microrubans correspondant ;
- les figures 8A et 8B illustrent la conception d'un coupleur -3 dB 180°;
- figure 8A : représentation d'un anneau hybride 180° ;
- figure 8B : coupleur en lignes microrubans correspondant.
- la figure 9 illustre le rapport d'onde stationnaire (ROS) d'un mode de réalisation particulier de l'antenne des figures 1 et 2 ;
- les figures 10 et 11 présentent des diagrammes de rayonnement mesurés en polarisation circulaire droite et gauche du même mode de réalisation, respectivement aux fréquences 1,98 GHz et 2,2 GHz ;
- la figure 12 montre le découplage (S21) entre les deux hélices.
- longueur : 90 mm ;
- largeur : 2 mm ;
- épaisseur : 35 µm ;
- angle d'inclinaison : 54,5°.
- des lignes de faible largeur, présentant une caractéristique inductive ;
- des lignes plus larges, présentant une caractéristique capacitive.
- elle est à brins ouverts, donc l'impédance de chaque brin est aisément adaptable à 50 Ω pour une antenne ayant les propriétés souhaitées (couverture hémisphérique et polarisation inverse faible) ;
- la structure d'alimentation utilisant des hybrides est large bande, et
parfaitement équilibrée :
- en amplitude (identique pour chaque brin) ; et
- en phase (0° ; ± 90° ; ± 180° ; ± 270°) ;
- les dimensions du dispositif d'alimentation sont plus faibles que celles des systèmes connus (un gain de l'ordre de 50 % peut être obtenu). En effet, on constate aisément que chaque élément semi-localisé est de taille très inférieure à la ligne qu'il remplace (qui est généralement d'une taille multiple de λ/4) ;
- l'antenne présente une forte isolation brin à brin.
- diamètre : 26 mm ;
- hauteur : 130 mm;
- poids total : 70 g.
- émission : 2.17 - 2.2 GHz
- réception : 1.98 - 2.01 GHz
- polarisation : circulaire droite
- couverture : 180°
- ellipticité : < 5 dB pour < 90°
< 2 dB pour < 75° - défaut d'omnidirectionnalité : ± 0,6 dB à l'horizon.
- une ouverture moyenne à -3 dB quasi-hémisphérique supérieure à 180° ;
- une réjection de la polarisation inverse supérieure à -15 dB dans toute la couverture.
Claims (10)
- Antenne hélicoïdale fonctionnant dans deux bandes de fréquence voisines correspondant respectivement à l'émission et à la réception, du type présentant deux hélices coaxiales, formées chacune de brins rayonnants (111 à 114 ; 511 à 514) imprimés sur un substrat,
caractérisé en ce que chacune desdites hélices est associée à une structure indépendante d'alimentation et de duplexage, également imprimée sur ledit substrat et comprenant au moins un coupleur hybride (12, 13, 14) réalisé à partir d'éléments semi-localisés, obtenus de la façon suivante :conception d'un coupleur en éléments distribués, chaque tronçon ayant une longueur au moins égale à λg/4, λg étant la longueur d'onde maximale de fonctionnement de ladite antenne ;détermination d'une structure correspondante en éléments localisés, chacun desdits tronçons étant remplacé par une cellule en π formée d'une capacité C et de deux inductances L et L' ;détermination d'une structure en éléments serai-localisés, dans laquelle chacune desdites capacités C et remplacée par une ligne large (86) et chacune desdites inductances L et L' par une ligne de plus faible largeur (85), - Antenne selon la revendication 1, caractérisée en ce que lesdites hélices présentent, lorsqu'elles sont mises à plat, des brins (111 à114 ; 511 à 514) présentant des directions symétriques par rapport à l'axe de ladite antenne, et sont enroulées selon des sens d'enroulement opposés, de façon que lesdits brins soient sensiblement parallèles.
- Antenne selon l'une quelconque des revendications 1 et 2, caractérisée en ce que les points d'excitation (61, 62) de chacune desdites hélices quadrifilaires sont décalés l'un par rapport à l'autre, dans un plan perpendiculaire à l'axe desdites hélices.
- Antenne selon la revendication 3, caractérisée en ce que lesdits points d'excitation (61, 62) sont décalés de 135°.
- Antenne selon l'une quelconque des revendications 1 à 4, caractérisée en ce que lesdites hélices sont des hélices quadrifilaires, formées chacune de quatre brins (111 à 114 ; 511 à 514) rayonnants alimentés par une structure d'alimentation comprenant trois coupleurs hybrides.
- Antenne selon la revendication 5, caractérisée en ce que chacune desdites structures d'alimentation comprend un premier coupleur hybride à 180° (12) associant une entrée et/ou sortie d'alimentation de ladite antenne à deux sorties et/ou entrées intermédiaires déphasées de 180°, et deux coupleurs hybrides à 90° (13, 14) associant chacun l'une desdites sorties et/ou entrées intermédiaires dudit premier coupleur hybride à une des extrémités de deux desdits brins rayonnants.
- Antenne selon l'une quelconque des revendications 1 à 6, caractérisée en ce qu'au moins une desdites hélices est montée sur un support présentant une première et une seconde parties distinctes ayant des permittivités différentes, ladite première partie portant lesdits brins rayonnants (111 à 114 ; 511 à 514) et ladite seconde partie portant ladite structure d'alimentation.
- Antenne selon la revendication 7, caractérisée en ce que ladite première partie portant lesdits brins rayonnants (111 à 114 ; 511 à 514) présente une permittivité supérieure à la permittivité de ladite seconde partie.
- Procédé de fabrication d'une antenne hélicoïdale à moyens de duplexage et d'alimentation miniaturisés intégrés comprenant deux hélices coaxiales découplées, caractérisé en ce qu'il comprend, pour chacune desdites hélices, les étapes suivantes :impression sur un substrat plan d'au moins deux brins rayonnants (111 à 114 ; 511 à 514), destinés à former une hélice, et d'une structure indépendante d'alimentation miniaturisée large bande desdits brins rayonnants comprenant au moins un coupleur hybride (12, 13, 14) réalisé à partir d'éléments semi-localisés, obtenus de la façon suivante :conception d'un coupleur en éléments distribués, chaque tronçon ayant une longueur au moins égale à λg/4, λg étant la longueur d'onde maximale de fonctionnement de ladite antenne ;détermination d'une structure correspondante en éléments localisés, chacun desdits tronçons étant remplacé par une cellule en π formée d'une capacité C et de deux inductances L et L' ;détermination d'une structure en éléments semi-localisés, dans laquelle chacune desdites capacités C et remplacée par une ligne large (86) et chacune desdites inductances L et L' par une ligne de plus faible largeur (85),enroulement dudit substrat autour d'un support cylindrique.
- Procédé de fabrication d'une antenne hélicoïdale à moyens de duplexage et d'alimentation miniaturisés intégrés comprenant deux hélices coaxiales découplées, caractérisé en ce qu'il comprend, pour chacune desdites hélices, les étapes suivantes :obtention d'un support cylindrique portant un substrat ;impression sur ledit substrat d'au moins deux brins rayonnants (111 à 114 ; 511 à 514), destinés à former une hélice, et d'une structure indépendante d'alimentation miniaturisée large bande desdits brins rayonnants comprenant au moins un coupleur hybride (12, 13, 14) réalisé à partir d'éléments semi-localisés, obtenus de la façon suivante :conception d'un coupleur en éléments distribués, chaque tronçon ayant une longueur au moins égale à λg/4, λg étant la longueur d'onde maximale de fonctionnement de ladite antenne ;détermination d'une structure correspondante en éléments localisés, chacun desdits tronçons étant remplacé par une cellule en π formée d'une capacité C et de deux inductances L et L' ;détermination d'une structure en éléments semi-localisés, dans laquelle chacune desdites capacités C et remplacée par une ligne large (86) et chacune desdites inductances L et L' par une ligne de plus faible largeur (85),
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9603699 | 1996-03-19 | ||
FR9603699A FR2746548B1 (fr) | 1996-03-19 | 1996-03-19 | Antenne helicoidale a moyens de duplexage integres, et procedes de fabrication correspondants |
PCT/FR1997/000456 WO1997035357A1 (fr) | 1996-03-19 | 1997-03-13 | Antenne helicoidale a moyens de duplexage integres, et procedes de fabrication correspondants |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0888648A1 EP0888648A1 (fr) | 1999-01-07 |
EP0888648B1 true EP0888648B1 (fr) | 2003-11-05 |
Family
ID=9490519
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97914395A Expired - Lifetime EP0888648B1 (fr) | 1996-03-19 | 1997-03-13 | Antenne helicoidale a moyens de duplexage integres, et procedes de fabrication correspondants |
Country Status (9)
Country | Link |
---|---|
US (1) | US6608604B1 (fr) |
EP (1) | EP0888648B1 (fr) |
CN (1) | CN1218434C (fr) |
AU (1) | AU2165197A (fr) |
CA (1) | CA2248884A1 (fr) |
DE (1) | DE69725972T2 (fr) |
ES (1) | ES2212088T3 (fr) |
FR (1) | FR2746548B1 (fr) |
WO (1) | WO1997035357A1 (fr) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6072441A (en) * | 1997-11-06 | 2000-06-06 | Nec Corporation | Method of producing a helical antenna and the helical antenna apparatus |
SE514530C2 (sv) | 1998-05-18 | 2001-03-12 | Allgon Ab | Antennanordning omfattande kapacitivt kopplade radiotorelement och en handburen radiokommunikationsanordning för en sådan antennanordning |
SE514568C2 (sv) | 1998-05-18 | 2001-03-12 | Allgon Ab | Antennanordning omfattande matningsmedel och en handburen radiokommunikationsanordning för en sådan antennanordning |
FR2814285A1 (fr) * | 2000-09-15 | 2002-03-22 | France Telecom | Antenne helicoidale a pas variable, et procede correspondant |
US7173576B2 (en) * | 2004-07-28 | 2007-02-06 | Skycross, Inc. | Handset quadrifilar helical antenna mechanical structures |
US7245268B2 (en) * | 2004-07-28 | 2007-07-17 | Skycross, Inc. | Quadrifilar helical antenna |
CN1314287C (zh) * | 2005-06-24 | 2007-05-02 | 京信通信技术(广州)有限公司 | 用于移动通信双工塔顶放大器的高集成化通用双工器模块 |
DE102006021839A1 (de) * | 2006-05-10 | 2007-11-15 | Siemens Ag | Antenne und Sende-/Empfangseinheit |
GB0700276D0 (en) * | 2007-01-08 | 2007-02-14 | Sarantel Ltd | A dielectrically-loaded antenna |
US8089421B2 (en) * | 2008-01-08 | 2012-01-03 | Sarantel Limited | Dielectrically loaded antenna |
JP2012520594A (ja) * | 2009-03-12 | 2012-09-06 | サランテル リミテッド | 誘電体装荷アンテナ |
US8456375B2 (en) * | 2009-05-05 | 2013-06-04 | Sarantel Limited | Multifilar antenna |
CN101600269B (zh) * | 2009-06-30 | 2011-06-08 | 华为技术有限公司 | 一种天馈共享装置、***及方法 |
CN102412859B (zh) * | 2010-09-21 | 2013-12-04 | 中国科学院上海微***与信息技术研究所 | 一种基于分立器件的射频混合双工器 |
US9923266B1 (en) | 2013-12-16 | 2018-03-20 | First Rf Corporation | Antenna array with tilted conical helical antennas |
US9343796B2 (en) * | 2014-07-15 | 2016-05-17 | Novatel Inc. | Wideband and low-loss quadrature phase quad-feeding network for high-performance GNSS antenna |
US10374299B1 (en) | 2015-02-06 | 2019-08-06 | First Rf Corporation | Method for making a radiator structure for a helical antenna |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4008479A (en) * | 1975-11-03 | 1977-02-15 | Chu Associates, Inc. | Dual-frequency circularly polarized spiral antenna for satellite navigation |
FR2654554B1 (fr) * | 1989-11-10 | 1992-07-31 | France Etat | Antenne en helice, quadrifilaire, resonnante bicouche. |
US5198831A (en) * | 1990-09-26 | 1993-03-30 | 501 Pronav International, Inc. | Personal positioning satellite navigator with printed quadrifilar helical antenna |
US5235296A (en) * | 1990-11-28 | 1993-08-10 | Matsushita Electric Industrial Co., Ltd. | Directional coupler using a microstrip line |
US5581268A (en) * | 1995-08-03 | 1996-12-03 | Globalstar L.P. | Method and apparatus for increasing antenna efficiency for hand-held mobile satellite communications terminal |
US5828348A (en) * | 1995-09-22 | 1998-10-27 | Qualcomm Incorporated | Dual-band octafilar helix antenna |
-
1996
- 1996-03-19 FR FR9603699A patent/FR2746548B1/fr not_active Expired - Fee Related
-
1997
- 1997-03-13 US US09/142,967 patent/US6608604B1/en not_active Expired - Fee Related
- 1997-03-13 CA CA002248884A patent/CA2248884A1/fr not_active Abandoned
- 1997-03-13 EP EP97914395A patent/EP0888648B1/fr not_active Expired - Lifetime
- 1997-03-13 AU AU21651/97A patent/AU2165197A/en not_active Abandoned
- 1997-03-13 ES ES97914395T patent/ES2212088T3/es not_active Expired - Lifetime
- 1997-03-13 WO PCT/FR1997/000456 patent/WO1997035357A1/fr active IP Right Grant
- 1997-03-13 DE DE69725972T patent/DE69725972T2/de not_active Expired - Fee Related
- 1997-03-13 CN CN971945128A patent/CN1218434C/zh not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
ES2212088T3 (es) | 2004-07-16 |
FR2746548A1 (fr) | 1997-09-26 |
WO1997035357A1 (fr) | 1997-09-25 |
DE69725972T2 (de) | 2004-09-02 |
CA2248884A1 (fr) | 1997-09-25 |
EP0888648A1 (fr) | 1999-01-07 |
DE69725972D1 (de) | 2003-12-11 |
US6608604B1 (en) | 2003-08-19 |
CN1218434C (zh) | 2005-09-07 |
AU2165197A (en) | 1997-10-10 |
FR2746548B1 (fr) | 1998-06-19 |
CN1218581A (zh) | 1999-06-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0888647B1 (fr) | Antenne helice a alimentation large bande integree, et procedes de fabrication correspondants | |
EP0888648B1 (fr) | Antenne helicoidale a moyens de duplexage integres, et procedes de fabrication correspondants | |
EP0427654B1 (fr) | Antenne en hélice, quadrifilaire, résonnante bicouche | |
EP0714151B1 (fr) | Antenne large bande monopôle en technologie imprimée uniplanaire et dispositif d'émission et/ou de réception incorporant une telle antenne | |
EP1299923B1 (fr) | Antenne planaire multibandes | |
EP1805848B1 (fr) | Antenne helice imprimee multibande a fente | |
FR2810163A1 (fr) | Perfectionnement aux antennes-sources d'emission/reception d'ondes electromagnetiques | |
EP0243289A1 (fr) | Antenne plaque à double polarisations croisées | |
FR2752646A1 (fr) | Antenne imprimee plane a elements superposes court-circuites | |
FR2797098A1 (fr) | Antenne imprimee bi-polarisation et reseau d'antennes correspondant | |
FR2778272A1 (fr) | Dispositif de radiocommunication et antenne bifrequence realisee selon la technique des microrubans | |
EP1540768B1 (fr) | Antenne helicoidale a large bande | |
FR2814285A1 (fr) | Antenne helicoidale a pas variable, et procede correspondant | |
EP0377155B1 (fr) | Dispositif rayonnant bifréquence | |
EP0463263B1 (fr) | Antenne omnidirective en polarisation circulaire transversale à maximum de gain sous l'horizon | |
WO2009077529A2 (fr) | Antenne active tres large bande pour radar passif | |
EP0477102B1 (fr) | Réseau directif pour radiocommunications, à éléments rayonnants adjacents et ensemble de tels réseaux directifs | |
FR2814286A1 (fr) | Antenne helice a brins de largeur variable | |
EP2092592B1 (fr) | Coupleur à bande de fonctionnement ultra large de jonction à mode orthogonal | |
EP2293385A1 (fr) | Antenne autodirectrice en polarisation circulaire | |
EP0654845A1 (fr) | Elément rayonnant adaptable du type dipôle réalisé en technologie imprimée, procédé d'ajustement de l'adaptation et réseau correspondants | |
WO2002037606A1 (fr) | Antenne multibande | |
EP0850496B1 (fr) | Dispositif d'emission a antenne omnidirectionnelle | |
FR2828014A1 (fr) | Antenne |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19981012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE ES GB IT |
|
17Q | First examination report despatched |
Effective date: 19990507 |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
RTI1 | Title (correction) |
Free format text: HELICAL ANTENNA WITH BUILT-IN DUPLEXING MEANS, AND MANUFACTURING METHODS THEREFORE |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE ES GB IT |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
REF | Corresponds to: |
Ref document number: 69725972 Country of ref document: DE Date of ref document: 20031211 Kind code of ref document: P |
|
GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 20040213 |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2212088 Country of ref document: ES Kind code of ref document: T3 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed |
Effective date: 20040806 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20060331 Year of fee payment: 10 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20070226 Year of fee payment: 11 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20070307 Year of fee payment: 11 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: ES Payment date: 20070308 Year of fee payment: 11 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20080313 |
|
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: 20081001 |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20080314 |
|
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: 20080313 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20080314 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20070313 |