EP2309594B1 - Wire antenna for the reception of radiowaves on a vessel - Google Patents
Wire antenna for the reception of radiowaves on a vessel Download PDFInfo
- Publication number
- EP2309594B1 EP2309594B1 EP10306056.2A EP10306056A EP2309594B1 EP 2309594 B1 EP2309594 B1 EP 2309594B1 EP 10306056 A EP10306056 A EP 10306056A EP 2309594 B1 EP2309594 B1 EP 2309594B1
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- European Patent Office
- Prior art keywords
- vessel
- antenna system
- signal receiving
- optical fiber
- radio signal
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- 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.)
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- 239000013307 optical fiber Substances 0.000 claims description 18
- 230000005540 biological transmission Effects 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 239000000835 fiber Substances 0.000 claims description 10
- 238000010521 absorption reaction Methods 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 4
- 230000009189 diving Effects 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 claims 1
- 238000011084 recovery Methods 0.000 description 9
- 239000000725 suspension Substances 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 229920000271 Kevlar® Polymers 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 235000021183 entrée Nutrition 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000004761 kevlar Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/28—Adaptation for use in or on aircraft, missiles, satellites, or balloons
- H01Q1/30—Means for trailing antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/34—Adaptation for use in or on ships, submarines, buoys or torpedoes
Definitions
- the present invention relates to a wired antenna system for receiving radio signals, in particular for a ship.
- the invention relates to such a system which comprises means for transmitting information between a free end of the antenna intended to be located at an altitude different from that of the ship, and associated with means for receiving the radio signals. and another end thereof adapted to be connected to means for retrieving the radio signals on board the ship.
- Such wire antenna systems are for example currently used on board ships such as submarines.
- such antennas are used in these submarines when they are diving for the reception of radio signals.
- the submarine then unwinds in its wake a wire antenna whose free end is intended to rise to the surface from this submarine.
- the wired antenna then receives the radio signals and is equipped with amplification means thereof to transmit them through electrical conductors to corresponding means of recovery aboard the submarine.
- the antenna cable may have lengths ranging from 400 to 850 meters for example and these antennas have a reception capacity in different frequency ranges, such as for example VLF / LF / HF or others.
- the signal amplification means which are fed at the antenna end to amplify the radio signals, are fragile and therefore unreliable.
- the length of the antenna cable is limited.
- the object of the invention is therefore to solve these problems.
- the subject of the invention is a wired antenna system for receiving radio signals, in particular for a ship, of the type comprising means of transmitting information between a free end of the antenna intended to be located at an altitude different from that of the ship, and associated with means for receiving the radio signals and another end thereof adapted to be connected to means for retrieving the radio signals on board the ship, characterized in that the means for transmission of information comprises optical fiber means whose end on board the ship is associated with means of emission therein of at least one laser beam, and whose other end intended to be located at an altitude different from that of the ship, comprises modulator means with electro-absorption modulation of the laser beam according to the signals r perceived adioelectrics, and in that the end of the optical fiber means onboard the ship, comprises means for recovery and opto-electrical conversion of the modulated part of the laser beam, in order to recover the radio signals.
- the means for transmission of information comprises optical fiber means whose end on board the ship is associated with means of emission therein of at least one laser beam, and
- the invention relates to a wired antenna system for receiving radio signals, in particular for a ship.
- this wired antenna system comprises information transmission means designated by the general reference 1 on the figure 1 between a free end of the antenna, designated by the general reference 2, intended to be located at an altitude different from that of the ship and associated with means for receiving the radio signals, and another end of this antenna, designated by general reference 3, adapted to be connected to means for recovering radio signals on board the ship.
- the information transmission means comprise optical fiber means, designated by the general reference 7 on this figure 1 , whose end on board the ship is associated with means for transmitting therein at least one laser beam.
- the other end of these fiber means intended to be located at an altitude different from that of the ship, comprises electro-absorption modulator means designated by the general reference 9 on this figure 1 , modulating the laser beam according to the radio signals perceived by them.
- the end of the optical fiber means onboard the ship also includes means for recovery and opto-electrical conversion of the modulated portion of the laser beam to recover the radio signals.
- the optical fiber means are for example placed in a protective cable designated by the general reference 11 which may for example comprise an internal protective braid designated by the general reference 12, which is constituted for example by KEVLAR.
- the corresponding free end of this antenna then comprises a radio antenna proper designated by the general reference 13, one end of which is delimited by an antenna end electrode 14 in a conventional manner and the other end of which is connected to the antenna means. impedance matching designated by reference 15.
- This laser beam is in fact derived from the part of the antenna on board the ship, this part comprising means forming a beam circulator, designated by the general reference 16 on this figure 1 , receiving as input the laser beam from corresponding transmission means designated by the general reference 17 in this figure, and comprising a device 18 for controlling the operation of at least one laser diode 19, for injecting this laser beam into the fiber optic means.
- These circulator means 16 output the modulated part of this beam to the recovery and conversion means 10.
- These recovery and conversion means 10 comprise for example at least one photodiode designated by the general reference 20 on this figure 1 , the output of which is associated with means for filtering frequency ranges of the retrieved radioelectric signals, these filtering means being designated by the general reference 21 in this figure.
- the latter can then be constituted as illustrated on the figure 2 , by a surface building as designated by the general reference 22, which then hangs behind it, an antenna system 23 according to the invention, one end of which is connected to this vessel and whose other end is adapted to be connected to an object able to gain altitude above this surface building.
- This object is designated by the general reference 24 in this figure and is for example in the form of a suspension balloon of the corresponding end of the antenna.
- a drone can also be used for this purpose.
- the ship can also be constituted by a submarine as schematized on the figure 3 , the submarine being designated by the general reference 25 in this figure.
- the antenna system according to the invention is in turn designated by the general reference 26 on this figure 3 and its free end is then adapted to go to the surface from this submarine when it is diving.
- This end of the antenna is designated by the general reference 27 on this figure 3 .
- the radio antenna part of the antenna designated by the general reference 28 is also recognized, the electro-absorption modulator means designated by the general reference 29, thick-shell traversing means designated by the general reference 30 of conventional type and recovery and conversion means designated by general reference 31.
- means means for storing the antenna these means being for example in the form of a drum winding / unwinding of the antenna.
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Astronomy & Astrophysics (AREA)
- Aviation & Aerospace Engineering (AREA)
- General Physics & Mathematics (AREA)
- Remote Sensing (AREA)
- Radar Systems Or Details Thereof (AREA)
- Details Of Aerials (AREA)
Description
La présente invention concerne un système d'antenne filaire de réception de signaux radioélectriques, notamment pour un navire.The present invention relates to a wired antenna system for receiving radio signals, in particular for a ship.
Plus particulièrement, l'invention concerne un tel système qui comporte des moyens de transmission d'informations entre une extrémité libre de l'antenne destinée à être localisée à une altitude différente de celle du navire, et associée à des moyens de réception des signaux radioélectriques et une autre extrémité de celle-ci adaptée pour être raccordée à des moyens de récupération des signaux radioélectriques à bord du navire.More particularly, the invention relates to such a system which comprises means for transmitting information between a free end of the antenna intended to be located at an altitude different from that of the ship, and associated with means for receiving the radio signals. and another end thereof adapted to be connected to means for retrieving the radio signals on board the ship.
De tels systèmes d'antenne filaire sont par exemple utilisés actuellement à bord de navires tels que des sous-marins.Such wire antenna systems are for example currently used on board ships such as submarines.
En particulier, de telles antennes sont utilisées dans ces sous-marins lorsque ceux-ci sont en plongée pour la réception de signaux radioélectriques.In particular, such antennas are used in these submarines when they are diving for the reception of radio signals.
Le sous-marin dévide alors dans son sillage une antenne filaire dont l'extrémité libre est destinée à remonter à la surface à partir de ce sous-marin. L'antenne filaire reçoit alors les signaux radioélectriques et est équipée de moyens amplification de ceux-ci pour les transmettre à travers des conducteurs électriques à destination de moyens de récupération correspondants à bord du sous-marin.The submarine then unwinds in its wake a wire antenna whose free end is intended to rise to the surface from this submarine. The wired antenna then receives the radio signals and is equipped with amplification means thereof to transmit them through electrical conductors to corresponding means of recovery aboard the submarine.
Le câble d'antenne peut présenter des longueurs allant de 400 à 850 mètres par exemple et ces antennes ont une capacité de réception dans différentes gammes de fréquences, telles que par exemple en VLF/LF/HF ou autres.The antenna cable may have lengths ranging from 400 to 850 meters for example and these antennas have a reception capacity in different frequency ranges, such as for example VLF / LF / HF or others.
Le document
Cependant, ce type de systèmes d'antenne présente un certain nombre d'inconvénients.However, this type of antenna system has a number of disadvantages.
En effet, les moyens d'amplification de signaux, qui sont alimentés en bout d'antenne pour amplifier les signaux radioélectriques, sont fragiles et donc peu fiables.Indeed, the signal amplification means, which are fed at the antenna end to amplify the radio signals, are fragile and therefore unreliable.
Par ailleurs, l'intégration de ceux-ci à bord du navire est relativement difficile en particulier vis-à-vis du problème de susceptibilité électromagnétique dans les bandes de fréquence considérées.Moreover, the integration of these on board the ship is relatively difficult especially with respect to the problem of electromagnetic susceptibility in the frequency bands considered.
Par ailleurs, et en raison des pertes de lignes, la longueur du câble d'antenne est limitée.Moreover, and because of line losses, the length of the antenna cable is limited.
De façon générale, on sait également que des tentatives ont été réalisées pour utiliser des moyens à fibre optique et à faisceau laser pour assurer la transmission d'informations.In general, it is also known that attempts have been made to use optical fiber and laser beam means to provide information transmission.
On pourra par exemple se reporter aux documents
Cependant, tous ces systèmes n'ont pas donné pleinement satisfaction et n'ont pas été envisagés dans le cadre d'une application au domaine des navires.However, not all of these systems have been fully satisfactory and have not been considered as part of an application to the ship domain.
Le but de l'invention est donc de résoudre ces problèmes.The object of the invention is therefore to solve these problems.
A cet effet, l'invention a pour objet un système d'antenne filaire de réception de signaux radioélectriques, notamment pour un navire, du type comportant des moyens de transmission d'informations entre une extrémité libre de l'antenne destinée à être localisée à une altitude différente de celle du navire, et associée à des moyens de réception des signaux radioélectriques et une autre extrémité de celle-ci adaptée pour être raccordée à des moyens de récupération des signaux radioélectriques à bord du navire, caractérisé en ce que les moyens de transmission d'informations comprennent des moyens à fibre optique dont l'extrémité embarquée à bord du navire est associée à des moyens d'émission dans ceux-ci d'au moins un faisceau laser, et dont l'autre extrémité destinée à être localisée à une altitude différente de celle du navire, comporte des moyens formant modulateur à électro-absorption de modulation du faisceau laser en fonction des signaux radioélectriques perçus, et en ce que l'extrémité des moyens à fibre optique embarquée à bord du navire, comporte des moyens de récupération et de conversion opto-électrique de la partie modulée du faisceau laser, afin de récupérer les signaux radioélectriques.For this purpose, the subject of the invention is a wired antenna system for receiving radio signals, in particular for a ship, of the type comprising means of transmitting information between a free end of the antenna intended to be located at an altitude different from that of the ship, and associated with means for receiving the radio signals and another end thereof adapted to be connected to means for retrieving the radio signals on board the ship, characterized in that the means for transmission of information comprises optical fiber means whose end on board the ship is associated with means of emission therein of at least one laser beam, and whose other end intended to be located at an altitude different from that of the ship, comprises modulator means with electro-absorption modulation of the laser beam according to the signals r perceived adioelectrics, and in that the end of the optical fiber means onboard the ship, comprises means for recovery and opto-electrical conversion of the modulated part of the laser beam, in order to recover the radio signals.
Le système selon peut également présenter les caractéristiques suivantes, prises isolément ou en combinaison:
- l'extrémité des moyens à fibre optique adaptée pour être localisée à une altitude différente de celle du navire, est associée à des moyens formant adaptateur d'impédance et à une antenne radioélectrique proprement dite,
- les moyens à fibre optique sont placés dans un câble de protection,
- l'extrémité des moyens à fibre optique embarquée à bord du navire, est associée à des moyens formant circulateur de faisceau recevant en entrée le faisceau laser à partir des moyens d'émission correspondants pour l'injecter dans les moyens à fibre optique et délivrant en sortie la partie modulée de celui-ci aux moyens de récupération et de conversion,
- les moyens de récupération comprennent des moyens de filtrage en gammes de fréquence des signaux radioélectriques récupérés,
- les moyens de génération du faisceau laser et les moyens de conversion de la partie modulée de celui-ci comprennent au moins une diode laser et au moins une photodiode laser respectivement,
- le navire est un bâtiment de surface et l'extrémité libre des moyens à fibre optique est adaptée pour être reliée à un objet capable de prendre de l'altitude au-dessus du bâtiment de surface,
- l'objet est un ballon de suspension de l'antenne, et
- le navire est un sous-marin et l'extrémité libre des moyens à fibre optique est adaptée pour remonter à la surface à partir de ce sous-marin lorsque celui-ci est en plongée.
- the end of the optical fiber means adapted to be located at an altitude different from that of the ship, is associated with impedance adapter means and a radio antenna proper,
- the optical fiber means are placed in a protective cable,
- the end of the optical fiber means on board the ship, is associated with beam circulator means receiving at input the laser beam from the corresponding transmission means to inject it into the the optical fiber means and outputting the modulated portion thereof to the recovery and conversion means,
- the recovery means comprise filtering means in frequency ranges of the recovered radio signals,
- the means for generating the laser beam and the means for converting the modulated part thereof comprise at least one laser diode and at least one laser photodiode respectively,
- the vessel is a surface vessel and the free end of the fiber optic means is adapted to be connected to an object capable of gaining altitude above the surface vessel,
- the object is a suspension balloon of the antenna, and
- the ship is a submarine and the free end of the optical fiber means is adapted to rise to the surface from this submarine when it is submerged.
L'invention sera mieux comprise à l'aide de la description qui va suivre, donnée uniquement à titre d'exemple et faite en se référant aux dessins annexés, sur lesquels :
- la
figure 1 représente un schéma synoptique illustrant la structure et le fonctionnement d'un système d'antenne filaire selon l'invention ; - la
figure 2 représente de façon schématique l'application d'un tel système d'antenne filaire à un bâtiment de surface ; et - la
figure 3 représente un schéma synoptique illustrant l'application d'un tel système d'antenne filaire à un sous-marin.
- the
figure 1 represents a block diagram illustrating the structure and operation of a wire antenna system according to the invention; - the
figure 2 schematically represents the application of such a wire antenna system to a surface building; and - the
figure 3 represents a block diagram illustrating the application of such a wired antenna system to a submarine.
Comme cela a été indiqué précédemment, l'invention se rapporte à un système d'antenne filaire de réception de signaux radioélectriques, notamment pour un navire.As indicated above, the invention relates to a wired antenna system for receiving radio signals, in particular for a ship.
En fait, et de façon classique, ce système d'antenne filaire comporte des moyens de transmission d'informations désignés par la référence générale 1 sur la
Sur cette
Selon l'invention, les moyens de transmission d'informations, désignés par la référence générale 1, comprennent des moyens à fibre optique, désignés par la référence générale 7 sur cette
Ces moyens d'émission sont désignés par la référence générale 8 sur cette
L'autre extrémité de ces moyens à fibre, destinée à être localisée à une altitude différente de celle du navire, comporte des moyens formant modulateur à électro-absorption désignés par la référence générale 9 sur cette
L'extrémité des moyens à fibre optique embarquée à bord du navire comporte également des moyens de récupération et de conversion opto-électrique de la partie modulée du faisceau laser afin de récupérer les signaux radioélectriques.The end of the optical fiber means onboard the ship also includes means for recovery and opto-electrical conversion of the modulated portion of the laser beam to recover the radio signals.
Ces moyens de récupération et de conversion sont désignés par la référence générale 10 sur cette
Comme cela est illustré, les moyens à fibre optique sont par exemple placés dans un câble de protection désigné par la référence générale 11 qui peut par exemple comporter une tresse interne de protection désignée par la référence générale 12, celle-ci étant constituée par exemple de KEVLAR.As illustrated, the optical fiber means are for example placed in a protective cable designated by the
L'extrémité libre correspondante de cette antenne comporte alors une antenne radioélectrique proprement dite désignée par la référence générale 13, dont une extrémité est délimitée par une électrode d'extrémité antennaire 14 de façon classique et dont l'autre extrémité est reliée à des moyens d'adaptation d'impédance désignés par la référence 15.The corresponding free end of this antenna then comprises a radio antenna proper designated by the
Ceux-ci sont alors associés aux moyens formant modulateur à électro-absorption 9 permettant de moduler le faisceau laser.These are then associated with the means forming an electro-
Ce faisceau laser est en fait issu de la partie de l'antenne embarquée à bord du navire, cette partie comportant des moyens formant circulateur de faisceau, désignés par la référence générale 16 sur cette
Ces moyens formant circulateur 16 délivrent en sortie la partie modulée de ce faisceau aux moyens de récupération et de conversion 10.These circulator means 16 output the modulated part of this beam to the recovery and conversion means 10.
Ces moyens de récupération et de conversion 10 comprennent par exemple au moins une photodiode désignée par la référence générale 20 sur cette
On conçoit alors qu'une telle structure présente un certain nombre d'avantages notamment au niveau de sa fiabilité, des faibles pertes dans les moyens de transmission d'informations, du fait qu'il n'y a pas de susceptibilité électromagnétique, d'une augmentation du gain en sensibilité et d'un gain en poids de l'ensemble.It is then conceivable that such a structure has a certain number of advantages, in particular as regards its reliability, low losses in the information transmission means, because there is no electromagnetic susceptibility, an increase in the gain in sensitivity and a gain in weight of the whole.
Comme cela a été indiqué précédemment, un tel système peut être utilisé par un navire.As previously indicated, such a system can be used by a ship.
Celui-ci peut alors être constitué comme cela est illustré sur la
Cet objet est désigné par la référence générale 24 sur cette figure et se présente par exemple sous la forme d'un ballon de suspension de l'extrémité correspondante de l'antenne.This object is designated by the
Un drone peut également être utilisé à cet effet.A drone can also be used for this purpose.
Cependant le navire peut également être constitué par un sous-marin comme schématisé sur la
Le système d'antenne selon l'invention est quant à lui désigné par la référence générale 26 sur cette
Cette extrémité de l'antenne est désignée par la référence générale 27 sur cette
On a également illustré sur cette figure des moyens formant moyens de stockage de l'antenne, ces moyens se présentant par exemple sous la forme d'un tambour d'enroulement/déroulement de l'antenne.Also shown in this figure means means for storing the antenna, these means being for example in the form of a drum winding / unwinding of the antenna.
Bien entendu, d'autres modes de réalisation peuvent être envisagés.Of course, other embodiments can be envisaged.
Claims (9)
- Wire radio signal receiving antenna system, in particular for a vessel, of the type comprising information transmission means (1) between an open end (2) of the antenna intended to be located at a different altitude to that of the vessel, and associated with means for receiving the radio signals, and another end (3) designed to be connected to means for retrieving (10) the radio signals on board the vessel, characterized in that the information transmission means comprise fiber optic means (7) whose end on board the vessel is associated with means (16, 17, 18, 19) for transmitting in them at least a laser beam, the other end of which is intended to be located at an altitude different from that of the vessel, comprises means forming an electro-absorption modulator to modulate the laser beam as a function of the radio signals received, and in that the end of the optical fiber means (7) on board the vessel, comprises means (10) for the retrieval and opto-electric conversion of the modulated portion of the laser beam, in order to retrieve the radio signals.
- Wire radio signal receiving antenna system according to claim 1, characterized in that the end of the optical fiber means (7) designed to be located at an altitude different from that of the vessel, is associated with means forming an impedance tuner (15) and the radio antenna (13) itself.
- Wire radio signal receiving antenna system according to claim 1 or 2, characterized in that the optical fiber means (7) are placed in a protective cable (11).
- Wire radio signal receiving antenna system according to any one of the preceding claims, characterized in that the end of the optical fiber means (7) on board the vessel is associated with means forming an optical beam circulator (16) receiving as input the laser beam from the corresponding transmission means (17, 18, 19) for injecting it into the optical fiber means (7) and outputting the modulated portion thereof to the retrieval and conversion means (10).
- Wire radio signal receiving antenna system according to any one of the preceding claims, characterized in that the retrieval means comprise means (21) for filtering the retrieved radio signals in frequency ranges.
- Wire radio signal receiving antenna system according to any one of the preceding claims, characterized in that the means for generating the laser beam and the means for converting the modulated part thereof comprise at least one laser diode (19) and at least one laser photodiode (20) respectively.
- Wire radio signal receiving antenna system according to any one of the preceding claims, characterized in that the vessel is a surface vessel (22) and that the open end of the optical fiber means (23) is designed to be connected to an object (24) capable of gaining altitude above the surface vessel (22).
- Wire radio signal receiving antenna system according to claim 7, characterized in that the object is a balloon (24) for suspending the antenna.
- Wire radio signal receiving antenna system according to any one of claims 1 to 6, characterized in that the vessel is a submarine (25), and in that the open end of the optical fiber means (7) is designed to rise to the surface from this submarine when the latter is diving.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0957056A FR2951322B1 (en) | 2009-10-09 | 2009-10-09 | WIRELESS ANTENNA SYSTEM FOR RECEIVING RADIO SIGNALS, IN PARTICULAR FOR A SHIP |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2309594A1 EP2309594A1 (en) | 2011-04-13 |
EP2309594B1 true EP2309594B1 (en) | 2019-06-19 |
Family
ID=41667521
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10306056.2A Active EP2309594B1 (en) | 2009-10-09 | 2010-09-29 | Wire antenna for the reception of radiowaves on a vessel |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2309594B1 (en) |
ES (1) | ES2745483T3 (en) |
FR (1) | FR2951322B1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3064407B1 (en) * | 2017-03-27 | 2019-04-26 | Dcns | SUBMARINE ENGINE EQUIPPED WITH A WINCH FOR DEPLOYING A WIRED ANTENNA |
FR3064406B1 (en) * | 2017-03-27 | 2019-04-26 | Dcns | BROADBAND WIRED ANTENNA FOR SUBMARINE ENGINE |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5136295A (en) * | 1991-05-14 | 1992-08-04 | The Boeing Company | Airborne fiber optic decoy architecture |
US5319376A (en) * | 1992-12-01 | 1994-06-07 | Trw Inc. | Arctic submarine buoy and application methods |
CA2253413C (en) | 1996-07-19 | 2004-01-20 | British Telecommunications Public Limited Company | Telecommunications system simultaneously receiving and modulating an optical signal |
GB2404444B (en) * | 2003-07-28 | 2006-11-29 | Statoil Asa | Transmitter antena |
US20060083520A1 (en) | 2004-10-15 | 2006-04-20 | Peter Healey | Communication by radio waves and optical waveguides |
US7559288B2 (en) * | 2007-07-30 | 2009-07-14 | The United States Of America As Represented By The Secretary Of The Navy | Recoverable optical fiber tethered buoy assembly |
-
2009
- 2009-10-09 FR FR0957056A patent/FR2951322B1/en active Active
-
2010
- 2010-09-29 ES ES10306056T patent/ES2745483T3/en active Active
- 2010-09-29 EP EP10306056.2A patent/EP2309594B1/en active Active
Non-Patent Citations (1)
Title |
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None * |
Also Published As
Publication number | Publication date |
---|---|
EP2309594A1 (en) | 2011-04-13 |
FR2951322A1 (en) | 2011-04-15 |
FR2951322B1 (en) | 2011-12-09 |
ES2745483T3 (en) | 2020-03-02 |
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