EP1387437A1 - Antenne multisources notamment pour système à reflecteur - Google Patents
Antenne multisources notamment pour système à reflecteur Download PDFInfo
- Publication number
- EP1387437A1 EP1387437A1 EP03291727A EP03291727A EP1387437A1 EP 1387437 A1 EP1387437 A1 EP 1387437A1 EP 03291727 A EP03291727 A EP 03291727A EP 03291727 A EP03291727 A EP 03291727A EP 1387437 A1 EP1387437 A1 EP 1387437A1
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- European Patent Office
- Prior art keywords
- bip
- antenna according
- frequency
- sources
- arrangement
- Prior art date
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Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
- H01Q15/0013—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective
- H01Q15/0026—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective said selective devices having a stacked geometry or having multiple layers
Definitions
- the present invention relates to the field of telecommunications. It relates more particularly to an antenna of multisource telecommunications. This multisource antenna can in particular be used in a reflector system.
- the present invention aims to provide an antenna multiband directive that is compact, so as to overcome problems of congestion related to the prior art represented by the reflective antenna dual-band source and the system with two planar antennas.
- the object of the present invention is therefore to remedy the problems above.
- the energy radiated by each of the sources of excitation is channeled over an apparent surface more important, while avoiding coupling between sources.
- the source equivalent to the level of selectivity means is sufficient directive not to generate overflow losses, interleaving allowing to reduce losses by overlapping between two spots.
- said means of spatial selectivity and frequency include a Photonic Forbidden Band network said BEEP.
- the BIP network comprises a arrangement of dielectric plates with one-dimensional periodicity (says 1D arrangement).
- the BIP network comprises a arrangement of dielectric bars with a periodicity of two dimensions (known as 2D arrangement).
- the BIP network comprises a arrangement of dielectric bars with a periodicity of three dimensions (known as 3D arrangement), like a pile of wood.
- the BIP network comprises a periodic arrangement of metallic patterns.
- the BIP network comprises a periodic arrangement of slots in the ground plane.
- the BIP network comprises a arrangement of metallic wires.
- said excitation sources form a passive focal network, the interlacing of the radiating openings associated with each source of the passive focal network generating a channel of radiated energy on an apparent surface enlarged at the level of BIP network.
- the excitation sources operate in different frequency bands and at the same aperture radiant.
- the BIP network comprises a periodic arrangement of metallic wires, part of these wires being locally and periodically removed. These metallization withdrawals allow a second operating band to be produced, independent of the first.
- the BIP network comprises a periodic arrangement of dielectric plates, the thickness of one of them it being modified compared to the others. This break in periodicity allows a second operating band, independent of the first one.
- the BIP network comprises at least two metal plates with resonant patterns resonant to their own operating frequency and transparent to the other frequency of resonance.
- the BIP network comprises a periodic arrangement of metallic patterns, and an arrangement periodic of slots in a ground plane. These periodic arrangements are resonant at their own frequency of operation and transparent at the other resonant frequency.
- one of the metal plates forms a reflecting surface at the highest frequency and is transparent at the lowest operating frequency, being then placed at a length of half a wavelength corresponding to this high frequency of the ground plane (70), and in that a second metal plate forms a surface reflecting at the frequency and is transparent at the higher frequency (f h ), the latter being placed at a length of half a length of wave corresponding to this low frequency of the ground plane.
- At least one of the sources works in one receiving frequency band and another from the sources operates in a transmit frequency band.
- it is intended for operation in a reflector system.
- the object of the present invention is to apply the potential of these antennas to innovative antenna concepts for satellite telecommunications systems (antenna on board a vehicle satellite or antenna type).
- a BIP network can be realized by a periodic arrangement of metallic patterns, or dielectric patterns.
- metallic patterns or dielectric patterns.
- dielectric patterns Of course, there are countless ways to make a BIP network. For reasons of conciseness, it will be detailed, in the present request, only the networks to dielectric patterns or those with metallic patterns.
- a BIP network can be made up of a regular arrangement of dielectric plates of permittivity ⁇ r1 and of thickness ⁇ / 4 sqrt ( ⁇ r1 ) and spaced by a medium of lower permittivity ⁇ r2 and of thickness ⁇ / 4 sqrt ( ⁇ r2 ). It can also be produced by an arrangement of dielectric bars of very high permittivity, and distant from ⁇ / 4.
- a network with dielectric plates is for example in French patent application No. FR 99 14521.
- FIG. 2 represents a multisource antenna 4.
- This antenna comprises a focal network 5 and a BIP network consisting of an arrangement of dielectric plates 61.62 placed above the ground plane 70 on which are engraved with excitation probes 51,52, ... 5n forming the network 5.
- This periodic arrangement of dielectric plates defines a resonant cavity.
- the wave emitted by the excitation probe is then distributed over a large radiant surface.
- the size of this surface depends on the reflectivity of the dielectric (or metallic layers in the case of grids metal).
- the BIP network of FIG. 2a illustrates an arrangement one-dimensional dielectric plates.
- Figures 2b, 2c and 2d respectively illustrate crystals electromagnetic dielectric with a periodicity at one, two and three dimensions.
- the network 6 allows the interleaving of the radiant openings associated with each source of the passive focal network. he is to channel the energy radiated on an apparent surface more important than exciting sources, while avoiding too much coupling high between them.
- the sources of the passive focal network thus become more directives that the surface they occupy in the lower network 5, and the overflow losses decrease.
- sources frequency selective can be pellets microstrips, dielectric resonators or non-resonant slots, connected to frequency selective filters.
- FIG. 3 represents a multisource antenna 7 according to a second embodiment of the invention.
- two pads 81.82 are excited by two 91.92 excitation probes in two modes.
- These two modes can be a fundamental mode and a harmonic, for example.
- the antenna 7 is capable of producing several sources directives, operating in several frequency bands, in the same radiant opening. This results in a very significant space saving.
- the arrangement of the dielectric layers 61,62 can be determined so as to generate several distinct resonances in the BIP material. Arrangements specific dielectric layers 61,62 (or metallized in the frame of metallized patterns) can in particular lead to bands of operation of the BIP material adapted to the ratio specific to the application, and no longer regularly spaced.
- multiband BIP networks can be obtained using metallic BIP networks with resonant patterns. It is then a question of optimizing two BIP networks at each of the operating frequencies. Layers are resonant at their own frequency of operation and transparent to the other resonant frequency. This is a principle analogous to that of frequency selective surfaces. interweave these reflective layers, so as to respect the rules of distances between different layers operating at the same frequency ( ⁇ / 4), as well as the distance between the ground plane and the metallized layer associated with each operating frequency ( ⁇ / 2).
- FIG. 4 represents such a BIP network produced in the form of metallic patterns.
- it can be made of metal wires of the same direction, and distant from ⁇ / 4, or of a grid made up of two networks of orthogonal metal wires.
- This type of BIP network is for example described in the French patent application filed by the applicant on 1 September 1997 under reference No 97 FR 10842.
- Figure 1 of this application is shown an embodiment of a network BIP whose reflective surface consists of metallic patterns. In this case, these are circular pellets or rings. We can also consider braces, tripoles, etc.
- the reflecting structure is consisting only of an interface. There may, however, be more than one. 40 as in FIG. 4. In this case, the metallized interfaces must be distant from ⁇ / 4 from each other. The main thing is to have the structure reflecting at ⁇ / 2 of the ground plane.
- patch 41 can also be made by a slot in the plane of ground, or by a dielectric resonator, etc ...
- FIG. 5 illustrates such an excitation by a slot 42.
- the advantage of the implantation of such a slot is to allow feeding by a guide 43, and to be able to carry out the filtering necessary for the proper functioning of the antenna by a guide technology filter.
- Iris 44 are implanted in the guide to allow adaptation. Such irises are, for example, described in the French patent application filed by the Applicant and cited above.
- FIG. 6 illustrates an antenna 7 with an array 6 of layers dielectric, fed by a slot 42 '.
- the main thing for this slot is that it is non-resonant, to limit the couplings between neighboring slots.
- FIG. 7 represents an antenna according to an embodiment of the invention.
- the 6 BIP network used is of the metallic type whose layers 61.62 are not resonant. They are made up of wires or tracks metal.
- the network excitation means has not been illustrated.
- FIG. 8 a multisource antenna is illustrated according to an embodiment of the invention.
- Network 6, for simplicity, is made by a single resonant interface at each frequency.
- the antenna 7 has two exciters 81, 82 operating at a respective natural frequency. These exciters are, in the figure, separate pellets placed side by side, but they can be slots.
- the exciter can also be a dual band exciter, with one or two ports, such as a "patch" with a slit in the center, as illustrated by the partial representation of the variant in FIG. 9.
- a reflecting surface at the highest frequency f h , and transparent at the lowest operating frequency f b , is placed at ⁇ fh / 2 from the ground plane.
- the second reflecting surface at the frequency f b , and transparent at f h is placed at ⁇ fb / 2 from the ground plane.
- the reflective interface at the highest frequency consists of the metallic patterns 45 of smaller size.
- the distance between the patterns can be used to adjust the reflectivity of the interface. We may want a lower reflectivity, and compensate for it by a greater number of interfaces. In this case, the realization of elements multiband radiant is achieved by an interlacing of different structures operating at each frequency, as illustrated in Figure 10.
- this can be done by locally modifying the thickness of a dielectric layer (or of a bar for 2D or 3D structures).
- a reflective surface at a frequency consisting of perforated patterns and a reflective surface made up of metallic patterns, such as the element radiating operating at two separate bands of Figure 14 comprising a multiresonator structure with metallic resonators 47 and slots 46.
- one of the sources can operate in a band Rx receiving frequency and another source can work in a transmission frequency Tx band.
Landscapes
- Aerials With Secondary Devices (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Waveguide Aerials (AREA)
Abstract
Description
- la taille maximale des sources est limitée par la maille du réseau focal, et dépend directement de l'espacement entre les spots,
- cette taille maximale est insuffisante ; le réflecteur étant mal illuminé, le rendement d'illumination est affecté de pertes par débordement ("spill over" en anglais) très élevées, et ne tient pas les spécifications demandées en termes de gain d'antenne requis.
- au moins deux sources d'excitation,
- des moyens de sélectivité spatiale et fréquentielle apte à canaliser
spatialement l'énergie captée/rayonnée par lesdites sources d'excitation, et
à permettre un découplage fréquentiel entre les bandes correspondantes
respectivement aux ondes reçues/émises par les sources,
les sources étant agencées sur un plan de masse de sorte à générer un entrelacement d'ouvertures rayonnantes au niveau desdits moyens de sélectivité.
- une première application consiste à tirer parti de la capacité du réseau BIP de canaliser dans une direction préalablement choisie l'énergie rayonnée à partir d'un élément excitateur simple (une pastille ou "patch" par exemple), ceci tout en élargissant la surface rayonnante. On obtient ainsi une antenne beaucoup plus directive que l'élément excitateur.
- une seconde application réside dans la réalisation d'un filtre fréquentiel et spatial, avec suppression des ondes de surfaces, atténuation des lobes de réseau, augmentation du découplage entre éléments rayonnants, ...
- comme expliqué ci-dessus, la première couche diélectrique (ou métallisée dans le cadre d'un mode de réalisation à motifs métallisés comme décrit dans la suite) est distante d'une demi longueur d'onde électrique du plan de masse,
- la structure est excitée par une sonde, ou un patch près du plan de masse, ou par une ouverture rayonnante dans ce plan de masse.
- matériaux diélectriques multicouches, dont plusieurs types
d'agencement sont présentés dans les figures 2a à 2d,
matériaux filaires métalliques, présentés aux figures 7a et 7b, matériaux constitués d'un réseau de motifs métalliques résonants.
- modification légère du motif en fonction de sa position latérale
- troncature des motifs dans l'objectif de repolariser l'onde, dans le cas d'un fonctionnement en polarisation circulaire, comme illustré sur la figure 6 de la demande n° FR 97 10842.
Claims (16)
- Antenne multisources (4,7),caractérisée en ce que l'antenne comprend :au moins deux sources (51,52,...5n,91,92) d'excitation,des moyens (6) de sélectivité spatiale et fréquentielle apte à canaliser spatialement l'énergie captée/rayonnée par lesdites sources d'excitation, et à permettre un découplage fréquentiel entre les bandes correspondantes respectivement aux ondes reçues/émises par les sources,
les sources étant agencées sur un plan de masse (70) de sorte à générer un entrelacement d'ouvertures rayonnantes au niveau desdits moyens de sélectivité. - Antenne selon la revendication 1, caractérisée en ce que ledits moyens de sélectivité spatiale et fréquentielle comprennent un réseau (5) à Bande Interdite Photonique dit BIP.
- Antenne selon la revendication 2, caractérisée en ce que le réseau BIP comprend un arrangement de plaques diélectriques (61,62) avec une périodicité à une dimension, dit arrangement 1.
- Antenne selon la revendication 2, caractérisée en ce que le réseau BIP comprend un arrangement de barreaux diélectriques avec une périodicité à deux dimensions, dit arrangement 2D.
- Antenne selon la revendication 2, caractérisée en ce que le réseau BIP comprend un arrangement de barreaux diélectriques avec une périodicité à trois dimensions ,dit arrangement 3D, de type tas de bois.
- Antenne selon la revendication 2, caractérisée en ce que le réseau BIP comprend un arrangement périodique de motifs métalliques.
- Antenne selon la revendication 2, caractérisée en ce que le réseau BIP comprend un arrangement périodique de fentes dans le plan de masse.
- Antenne selon la revendication 2, caractérisée en ce que le réseau BIP comprend un arrangement de fils métalliques.
- Antenne selon l'une des revendications précédentes, caractérisée en ce que lesdites sources d'excitation forment un réseau focal passif (5,51,52,...5n), l'entrelacement des ouvertures rayonnantes associées à chaque source du réseau focal passif générant un canal d'énergie rayonnée sur une surface apparente agrandie au niveau du réseau BIP.
- Antenne selon l'une des revendications précédentes, caractérisée en ce que les sources d'excitation fonctionnent dans différentes bandes de fréquence et selon la même ouverture rayonnante.
- Antenne selon la revendication précédente combinée à la revendication 2, caractérisée en ce que le réseau BIP comprend au moins deux plaques métalliques à motifs résonants résonantes à leur propre fréquence de fonctionnement et transparente à l'autre fréquence de résonance.
- Antenne selon la revendication 2, caractérisée en ce que le réseau BIP comprend un arrangement périodique de fils métalliques, une partie de ces fils étant localement et périodiquement retirés de manière à former une seconde bande de fonctionnement indépendante de la première.
- Antenne selon la revendication 11, caractérisée en ce qu'une des plaques métalliques forme surface réfléchissante à la plus haute fréquence (fh) et est transparente à la plus basse fréquence de fonctionnement (fb), étant alors placée à λfh/2 du plan (70) de masse, et en ce qu'une seconde plaque métallique forme surface réfléchissante à la fréquence (fb) et est transparente à la fréquence plus haute (fh), cette dernière étant placée à λfb/2 du plan de masse.
- Antenne selon la revendication 2, caractérisée en ce que le réseau BIP comprend un arrangement périodique de plaques diélectriques, l'épaisseur d'une d'entre elles étant modifiée par rapport aux autres, cette rupture de la périodicité permettant de réaliser une seconde bande de fonctionnement indépendante de la première.
- Antenne selon l'une des revendications précédentes, caractérisée en ce qu'au moins une des sources fonctionne dans une bande (Rx) de fréquence de réception et une autre des sources fonctionne dans une bande (Tx) de fréquence d'émission.
- Antenne selon l'une des revendications précédentes, caractérisée en ce qu'elle est destiné au fonctionnement dans un système (1) à réflecteur (2).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0209740 | 2002-07-31 | ||
FR0209740A FR2843238B1 (fr) | 2002-07-31 | 2002-07-31 | Antenne multisources notamment pour un systeme a reflecteur |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1387437A1 true EP1387437A1 (fr) | 2004-02-04 |
Family
ID=30011608
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03291727A Ceased EP1387437A1 (fr) | 2002-07-31 | 2003-07-11 | Antenne multisources notamment pour système à reflecteur |
Country Status (4)
Country | Link |
---|---|
US (1) | US6927729B2 (fr) |
EP (1) | EP1387437A1 (fr) |
JP (1) | JP2004135284A (fr) |
FR (1) | FR2843238B1 (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2906410A1 (fr) * | 2006-09-25 | 2008-03-28 | Cnes Epic | Antenne a materiau bip(bande interdite photonique), systeme et procede utilisant cette antenne |
FR2914506A1 (fr) * | 2007-03-29 | 2008-10-03 | Centre Nat Rech Scient | Antenne a resonateur equipe d'un revetement filtrant et systeme incorporant cette antenne. |
Families Citing this family (38)
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---|---|---|---|---|
EP1508940A1 (fr) * | 2003-08-19 | 2005-02-23 | Era Patents Limited | Contrôleur de rayonnement comprenant des réactances sur une surface dielectrique |
CN1989652B (zh) | 2004-06-28 | 2013-03-13 | 脉冲芬兰有限公司 | 天线部件 |
FI119009B (fi) | 2005-10-03 | 2008-06-13 | Pulse Finland Oy | Monikaistainen antennijärjestelmä |
US8618990B2 (en) | 2011-04-13 | 2013-12-31 | Pulse Finland Oy | Wideband antenna and methods |
US10211538B2 (en) | 2006-12-28 | 2019-02-19 | Pulse Finland Oy | Directional antenna apparatus and methods |
FI20075269A0 (fi) | 2007-04-19 | 2007-04-19 | Pulse Finland Oy | Menetelmä ja järjestely antennin sovittamiseksi |
FI120427B (fi) | 2007-08-30 | 2009-10-15 | Pulse Finland Oy | Säädettävä monikaista-antenni |
FI124129B (fi) * | 2007-09-28 | 2014-03-31 | Pulse Finland Oy | Kaksoisantenni |
FR2936906B1 (fr) * | 2008-10-07 | 2011-11-25 | Thales Sa | Reseau reflecteur a arrangement optimise et antenne comportant un tel reseau reflecteur |
FR2939568B1 (fr) * | 2008-12-05 | 2010-12-17 | Thales Sa | Antenne a partage de sources et procede d'elaboration d'une antenne a partage de sources pour l'elaboration de multi-faisceaux |
FI20096134A0 (fi) | 2009-11-03 | 2009-11-03 | Pulse Finland Oy | Säädettävä antenni |
FI20096251A0 (sv) | 2009-11-27 | 2009-11-27 | Pulse Finland Oy | MIMO-antenn |
FI20105158L (fi) | 2010-02-18 | 2011-08-19 | Pulse Finland Oy | Kuorisäteilijällä varustettu antenni |
JP5613064B2 (ja) * | 2011-01-11 | 2014-10-22 | 新日本無線株式会社 | マイクロ波用アンテナ |
FI20115072A0 (fi) | 2011-01-25 | 2011-01-25 | Pulse Finland Oy | Moniresonanssiantenni, -antennimoduuli ja radiolaite |
US8648752B2 (en) | 2011-02-11 | 2014-02-11 | Pulse Finland Oy | Chassis-excited antenna apparatus and methods |
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US9634383B2 (en) | 2013-06-26 | 2017-04-25 | Pulse Finland Oy | Galvanically separated non-interacting antenna sector apparatus and methods |
US9680212B2 (en) | 2013-11-20 | 2017-06-13 | Pulse Finland Oy | Capacitive grounding methods and apparatus for mobile devices |
US9590308B2 (en) | 2013-12-03 | 2017-03-07 | Pulse Electronics, Inc. | Reduced surface area antenna apparatus and mobile communications devices incorporating the same |
US9350081B2 (en) | 2014-01-14 | 2016-05-24 | Pulse Finland Oy | Switchable multi-radiator high band antenna apparatus |
US9948002B2 (en) | 2014-08-26 | 2018-04-17 | Pulse Finland Oy | Antenna apparatus with an integrated proximity sensor and methods |
US9973228B2 (en) | 2014-08-26 | 2018-05-15 | Pulse Finland Oy | Antenna apparatus with an integrated proximity sensor and methods |
US9722308B2 (en) | 2014-08-28 | 2017-08-01 | Pulse Finland Oy | Low passive intermodulation distributed antenna system for multiple-input multiple-output systems and methods of use |
US9906260B2 (en) | 2015-07-30 | 2018-02-27 | Pulse Finland Oy | Sensor-based closed loop antenna swapping apparatus and methods |
FR3058002B1 (fr) * | 2016-10-24 | 2018-12-07 | Universite Paris Sud | Antenne |
JP7193805B2 (ja) * | 2019-09-03 | 2022-12-21 | 日本電信電話株式会社 | アンテナシステム |
CN114914670B (zh) * | 2022-06-29 | 2024-12-03 | 四川太赫兹通信有限公司 | 一种太赫兹电控编码天线单元及太赫兹电控编码天线 |
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US4021812A (en) * | 1975-09-11 | 1977-05-03 | The United States Of America As Represented By The Secretary Of The Air Force | Layered dielectric filter for sidelobe suppression |
GB2337860A (en) * | 1997-04-29 | 1999-12-01 | Trw Inc | Frequency selective surface filter for an antenna |
WO2001037373A1 (fr) * | 1999-11-18 | 2001-05-25 | Centre National De La Recherche Scientifique (C.N.R.S.) | Antenne pourvue d'un assemblage de materiaux filtrant |
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US5160936A (en) * | 1989-07-31 | 1992-11-03 | The Boeing Company | Multiband shared aperture array antenna system |
US6690327B2 (en) * | 2001-09-19 | 2004-02-10 | Etenna Corporation | Mechanically reconfigurable artificial magnetic conductor |
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2002
- 2002-07-31 FR FR0209740A patent/FR2843238B1/fr not_active Expired - Fee Related
-
2003
- 2003-07-11 EP EP03291727A patent/EP1387437A1/fr not_active Ceased
- 2003-07-28 US US10/627,772 patent/US6927729B2/en not_active Expired - Fee Related
- 2003-07-30 JP JP2003282376A patent/JP2004135284A/ja active Pending
Patent Citations (3)
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US4021812A (en) * | 1975-09-11 | 1977-05-03 | The United States Of America As Represented By The Secretary Of The Air Force | Layered dielectric filter for sidelobe suppression |
GB2337860A (en) * | 1997-04-29 | 1999-12-01 | Trw Inc | Frequency selective surface filter for an antenna |
WO2001037373A1 (fr) * | 1999-11-18 | 2001-05-25 | Centre National De La Recherche Scientifique (C.N.R.S.) | Antenne pourvue d'un assemblage de materiaux filtrant |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2906410A1 (fr) * | 2006-09-25 | 2008-03-28 | Cnes Epic | Antenne a materiau bip(bande interdite photonique), systeme et procede utilisant cette antenne |
WO2008037887A2 (fr) * | 2006-09-25 | 2008-04-03 | Centre National D'etudes Spatiales | Antenne a materiau bip (bande interdite photonique) systeme |
WO2008037887A3 (fr) * | 2006-09-25 | 2008-05-22 | Centre Nat Etd Spatiales | Antenne a materiau bip (bande interdite photonique) systeme |
US8164542B2 (en) | 2006-09-25 | 2012-04-24 | Centre National D'etudes Spatiales | Antenna using a PBG (photonic band gap) material, and system and method using this antenna |
FR2914506A1 (fr) * | 2007-03-29 | 2008-10-03 | Centre Nat Rech Scient | Antenne a resonateur equipe d'un revetement filtrant et systeme incorporant cette antenne. |
WO2008135677A1 (fr) * | 2007-03-29 | 2008-11-13 | Centre National De La Recherche Scientifique (C.N.R.S) | Antenne à résonateur équipé d'un revêtement filtrant et système incorporant cette antenne |
US8149180B2 (en) | 2007-03-29 | 2012-04-03 | Centre National De La Recherche Scientifique (C.N.R.S.) | Antenna with resonator having a filtering coating and system including such antenna |
CN101682123B (zh) * | 2007-03-29 | 2012-12-05 | 国家科研中心 | 带有具有滤波涂层的谐振器的天线和包括该天线的系统 |
Also Published As
Publication number | Publication date |
---|---|
FR2843238A1 (fr) | 2004-02-06 |
FR2843238B1 (fr) | 2006-07-21 |
US6927729B2 (en) | 2005-08-09 |
US20040021607A1 (en) | 2004-02-05 |
JP2004135284A (ja) | 2004-04-30 |
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