EP2779304A1 - Wire antenna for the transmission of HF radiowaves on a submarine - Google Patents

Wire antenna for the transmission of HF radiowaves on a submarine Download PDF

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Publication number
EP2779304A1
EP2779304A1 EP14159877.1A EP14159877A EP2779304A1 EP 2779304 A1 EP2779304 A1 EP 2779304A1 EP 14159877 A EP14159877 A EP 14159877A EP 2779304 A1 EP2779304 A1 EP 2779304A1
Authority
EP
European Patent Office
Prior art keywords
radiating
antenna
coaxial cable
conductors
periphery
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.)
Granted
Application number
EP14159877.1A
Other languages
German (de)
French (fr)
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EP2779304B1 (en
Inventor
Jean-Baptiste Fievre
Pascal Rivet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Naval Group SA
Original Assignee
DCNS SA
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Publication date
Application filed by DCNS SA filed Critical DCNS SA
Publication of EP2779304A1 publication Critical patent/EP2779304A1/en
Application granted granted Critical
Publication of EP2779304B1 publication Critical patent/EP2779304B1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/04—Adaptation for subterranean or subaqueous use
    • 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 wire antenna for an HF emission by an underwater vehicle.
  • this type of antenna comprises a coaxial cable and a radiating end element.
  • This set is then for example towed by the underwater vehicle and drags behind it.
  • antennas known in the state of the art have a number of disadvantages including their very limited performance due to the impedance mismatch of this antenna, which results in a reduced efficiency of transmission.
  • the object of the invention is therefore to solve these problems.
  • the subject of the invention is a wire antenna for an HF emission by an underwater vehicle, of the type comprising a coaxial cable and a radiating end element, characterized in that the radiating element comprises a multi-stranded member.
  • the antenna is designated by the general reference 1.
  • this antenna then comprises a coaxial cable designated by the general reference 2 and a radiating end element designated by the general reference 3.
  • This antenna is then for example towed behind an underwater vehicle such as a submarine itself and goes back to the surface of the water (the "diopter") to allow data exchange and in particular HF emissions.
  • an underwater vehicle such as a submarine itself and goes back to the surface of the water (the "diopter") to allow data exchange and in particular HF emissions.
  • An intermediate electrode is placed between the two parts of this antenna 1, namely between the coaxial cable 2 and the radiating end element 3.
  • This intermediate electrode being designated by the general reference 4 on the figures 1 and 2.
  • the end of the radiating end element 3 also comprises a terminal electrode 5.
  • Electrodes have the function respectively of allowing the two portions of this cable to be connected together for the electrode 4 and to terminate it for the electrode 5.
  • the radiating end element is also constituted by a single-core member.
  • this element is formed by a multi-stranded member.
  • this multi-stranded member may for example be formed by a support member which may also be called a core, on the periphery of which are distributed several radiating conductors carried by the support member and providing exchanges.
  • the portion of coaxial cable 2 thus constitutes an offset cable towed behind the underwater vehicle.
  • the intermediate electrode 4 then provides the electrical interface between the conductive core of the coaxial cable 2 and the conductors of the multi-stranded end of the element 3 of this antenna, as well as a resumption of the sea possibly of a braid of this coaxial cable.
  • the terminal electrode 5 conventionally makes it possible to terminate the radiating element.
  • Such a structure has a number of advantages over prior art antenna systems.
  • the buoyancy of the antenna end multi-strand of the wire antenna according to the invention is greater than that of a coaxial single-strand configuration, because of a lower weight.
  • This definition is essential for the intended application because the transmission in the HF band is only possible with an antenna perfectly on the diopter, that is to say on the surface of the water.
  • the attenuation of the RF signal at the passage of this diopter is such that a slightly immersed antenna does not work properly in transmission.
  • the four radiating conductors for example of the multi-stranded radiating end are arranged at the periphery of a member such as a support cable or the like, making it possible to retain them.
  • the dimension characteristics make it possible, for example, to define a bandwidth of the wired antenna in the HF band, for example on the basis of a transmission in ⁇ / 4 at the frequency of 2 megahertz that is to say the bottom of the HF band.
  • the radiating end is composed for example of four regularly distributed conductors.

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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)
  • Details Of Aerials (AREA)

Abstract

The antenna has a coaxial cable (2), and a radiating end element (3) comprising a multi-stranded element. The multi-stranded element comprises a support element at periphery of which the radiating end element is arranged. Radiating conductors are regularly arranged around the periphery of the support element. An intermediate connection electrode (4) is placed between the coaxial cable and the radiating end element. A terminal electrode (5) is placed at the end of the radiating end element.

Description

La présente invention concerne une antenne filaire pour une émission HF par un engin sous marin.The present invention relates to a wire antenna for an HF emission by an underwater vehicle.

On connait déjà dans l'état de la technique, par exemple par le document FR A 2 962 854 , des antennes filaires pour ce type d'applications.We already know in the state of the art, for example by the document FR A 2 962 854 , wired antennas for this type of applications.

En règle générale, ce type d'antenne comporte un câble coaxial et un élément d'extrémité rayonnant.In general, this type of antenna comprises a coaxial cable and a radiating end element.

Cet ensemble est alors par exemple remorqué par l'engin sous marin et traîne derrière celui-ci.This set is then for example towed by the underwater vehicle and drags behind it.

Mais les antennes connues dans l'état de la technique présentent un certain nombre d'inconvénients notamment au niveau de leur performance très limitée du fait de la désadaptation d'impédance de cette antenne, ce qui se traduit par une efficacité réduite de la transmission.But antennas known in the state of the art have a number of disadvantages including their very limited performance due to the impedance mismatch of this antenna, which results in a reduced efficiency of transmission.

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 une antenne filaire pour une émission HF par un engin sous marin, du type comportant un câble coaxial et un élément d'extrémité rayonnant, caractérisée en ce que l'élément rayonnant comporte un organe multibrins.To this end, the subject of the invention is a wire antenna for an HF emission by an underwater vehicle, of the type comprising a coaxial cable and a radiating end element, characterized in that the radiating element comprises a multi-stranded member.

Suivant d'autres caractéristiques de l'antenne selon l'invention, prises seules ou en combinaison :

  • l'organe multibrins comporte un organe de soutien à la périphérie duquel sont disposés plusieurs conducteurs rayonnants ;
  • il est prévu au moins quatre conducteurs rayonnants ;
  • les conducteurs rayonnants sont disposés régulièrement autour de la périphérie de l'organe de support ;
  • une électrode intermédiaire de raccordement est placée entre le câble coaxial et l'élément d'extrémité rayonnant et une électrode terminale est placée à l'extrémité de cet élément d'extrémité rayonnant.
According to other features of the antenna according to the invention, taken alone or in combination:
  • the multi-strand member comprises a support member at the periphery of which are arranged a plurality of radiating conductors;
  • at least four radiating conductors are provided;
  • the radiating conductors are arranged regularly around the periphery of the support member;
  • an intermediate connecting electrode is placed between the coaxial cable and the radiating end element and an end electrode is placed at the end of this radiating end element.

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 une vue schématique d'une portion d'extrémité d'une antenne filaire selon l'invention, et
  • les figures 2 et 3 représentent respectivement des vues éclatées d'électrodes intermédiaire et terminale entrant dans la constitution d'une antenne filaire selon l'invention.
The invention will be better understood with the aid of the description which follows, given solely by way of example and with reference to the appended drawings, in which:
  • the figure 1 represents a schematic view of an end portion of a wire antenna according to the invention, and
  • Figures 2 and 3 respectively show exploded views of intermediate and terminal electrodes used in the constitution of a wire antenna according to the invention.

On a en effet illustré sur ces figures, une antenne filaire pour une émission HF par un engin sous marin tel qu'un sous marin proprement dit.It has in fact illustrated in these figures, a wire antenna for a HF emission by a submarine craft such as a submarine itself.

Sur ces figures, et en particulier sur la figure 1, l'antenne est désignée par la référence générale 1.In these figures, and especially on the figure 1 , the antenna is designated by the general reference 1.

De façon classique, cette antenne comporte alors un câble coaxial désigné par la référence générale 2 et un élément d'extrémité rayonnant désigné par la référence générale 3.In a conventional manner, this antenna then comprises a coaxial cable designated by the general reference 2 and a radiating end element designated by the general reference 3.

Cette antenne est alors par exemple remorquée derrière une engin sous marin tel qu'un sous marin proprement dit et remonte à la surface de l'eau (au « dioptre ») pour permettre des échanges de données et en particulier des émissions HF.This antenna is then for example towed behind an underwater vehicle such as a submarine itself and goes back to the surface of the water (the "diopter") to allow data exchange and in particular HF emissions.

Une électrode intermédiaire est placée entre les deux parties de cette antenne 1, à savoir entre le câble coaxial 2 et l'élément d'extrémité rayonnant 3.An intermediate electrode is placed between the two parts of this antenna 1, namely between the coaxial cable 2 and the radiating end element 3.

Cette électrode intermédiaire étant désignée par la référence générale 4 sur les figures 1 et 2.This intermediate electrode being designated by the general reference 4 on the figures 1 and 2.

L'extrémité de l'élément d'extrémité rayonnant 3 comporte également une électrode terminale 5.The end of the radiating end element 3 also comprises a terminal electrode 5.

Ces électrodes ont pour fonction respectivement de permettre le raccordement des deux portions de ce câble entre elles pour l'électrode 4 et de terminer celui-ci pour l'électrode 5.These electrodes have the function respectively of allowing the two portions of this cable to be connected together for the electrode 4 and to terminate it for the electrode 5.

Dans l'état de la technique, l'élément d'extrémité rayonnant est également constitué par un organe monobrin.In the state of the art, the radiating end element is also constituted by a single-core member.

Dans l'antenne filaire selon l'invention, cet élément est formé par un organe multibrins.In the wire antenna according to the invention, this element is formed by a multi-stranded member.

A titre d'exemple, cet organe multibrins peut par exemple être formé par un organe de support que l'on peut également appelée une âme, à la périphérie duquel sont répartis plusieurs conducteurs rayonnants portés par cet organe de support et assurant les échanges.For example, this multi-stranded member may for example be formed by a support member which may also be called a core, on the periphery of which are distributed several radiating conductors carried by the support member and providing exchanges.

Ainsi par exemple quatre conducteurs rayonnants régulièrement répartis autour de cet organe de support peuvent être envisagés.Thus, for example, four radiating conductors regularly distributed around this support member can be envisaged.

La portion de câble coaxial 2 constitue ainsi un câble de déport pris en remorque derrière l'engin sous marin.The portion of coaxial cable 2 thus constitutes an offset cable towed behind the underwater vehicle.

L'électrode intermédiaire 4 assure alors l'interface électrique entre l'âme conductrice du câble coaxial 2 et les conducteurs de l'extrémité multibrins de l'élément 3 de cette antenne, ainsi qu'une reprise à la mer éventuellement d'une tresse de ce câble coaxial.The intermediate electrode 4 then provides the electrical interface between the conductive core of the coaxial cable 2 and the conductors of the multi-stranded end of the element 3 of this antenna, as well as a resumption of the sea possibly of a braid of this coaxial cable.

Comme indiqué, l'électrode terminale 5 permet de façon classique de terminer l'élément rayonnant.As indicated, the terminal electrode 5 conventionally makes it possible to terminate the radiating element.

Une telle structure présente un certain nombre d'avantages par rapport aux systèmes d'antenne de l'état de la technique.Such a structure has a number of advantages over prior art antenna systems.

En effet, la flottabilité de l'extrémité antennaire multibrins de l'antenne filaire selon l'invention est supérieure à celle d'une configuration monobrin de type coaxial, en raison d'un poids inférieur.Indeed, the buoyancy of the antenna end multi-strand of the wire antenna according to the invention is greater than that of a coaxial single-strand configuration, because of a lower weight.

Cette définition est essentielle pour l'application envisagée car la transmission en bande HF n'est possible qu'avec une antenne parfaitement au dioptre, c'est-à-dire à la surface de l'eau.This definition is essential for the intended application because the transmission in the HF band is only possible with an antenna perfectly on the diopter, that is to say on the surface of the water.

L'atténuation du signal HF au passage de ce dioptre est telle qu'une antenne légèrement immergée ne fonctionne pas correctement en émission.The attenuation of the RF signal at the passage of this diopter is such that a slightly immersed antenna does not work properly in transmission.

Les quatre conducteurs rayonnants par exemple de l'extrémité rayonnante multibrins sont disposés à la périphérie d'un organe tel qu'un câble de support ou autre, permettant de retenir ceux-ci.The four radiating conductors for example of the multi-stranded radiating end are arranged at the periphery of a member such as a support cable or the like, making it possible to retain them.

Comparativement à une solution d'extrémité monobrin centré à l'intérieur du câble coaxial, l'intégration de plusieurs conducteurs en périphérie de l'organe de support assure un transfert d'énergie rayonnée supérieure pour la raison évoquée précédemment.Compared to a single-ended end solution centered inside the coaxial cable, the integration of several conductors at the periphery of the support member provides a higher radiated energy transfer for the reason mentioned above.

De plus, disposer de conducteurs au dioptre ou au dessus de ce dioptre améliore grandement l'efficacité de transmission en bande HF.In addition, having conductors on the diopter or above this dioptre greatly improves the transmission efficiency in the HF band.

Les caractéristiques de dimension comme par exemple de longueur des différentes portions de l'antenne permettent de définir par exemple une bande passante de l'antenne filaire en bande HF par exemple sur la base d'une émission en λ/4 à la fréquence de 2 mégahertz c'est-à-dire le bas de la bande HF.The dimension characteristics, for example the length of the different portions of the antenna, make it possible, for example, to define a bandwidth of the wired antenna in the HF band, for example on the basis of a transmission in λ / 4 at the frequency of 2 megahertz that is to say the bottom of the HF band.

L'extrémité rayonnante est composée par exemple de quatre conducteurs régulièrement répartis.The radiating end is composed for example of four regularly distributed conductors.

Un nombre différent de conducteurs peut bien entendu être envisagé de même qu'une autre répartition.A different number of drivers can of course be considered as well as another distribution.

Cette caractéristique permet de gérer l'impédance en court circuit de l'antenne. Les conducteurs placés en court circuit ou non sont reliés au niveau de l'électrode terminale par une opération par exemple mécanique.This characteristic makes it possible to manage the short circuit impedance of the antenna. Conductors placed in short circuit or not are connected at the level of the terminal electrode by an operation for example mechanical.

Il va de soi bien entendu que d'autres modes de réalisation encore peuvent être envisagés.It goes without saying of course that other embodiments can be envisaged.

Claims (5)

Antenne filaire pour une émission HF par un engin sous marin, du type comportant un câble coaxial (2) et un élément d'extrémité rayonnant (3), caractérisée en ce que l'élément rayonnant comporte un organe multibrins (3).Wired antenna for HF emission by an underwater vehicle, of the type comprising a coaxial cable (2) and a radiating end element (3), characterized in that the radiating element comprises a multi-stranded member (3). Antenne filaire selon la revendication 1, caractérisée en ce que l'organe multibrins (3) comporte un organe de soutien à la périphérie duquel sont disposés plusieurs conducteurs rayonnants (3).Wired antenna according to claim 1, characterized in that the multi-strand member (3) comprises a support member at the periphery of which are arranged a plurality of radiating conductors (3). Antenne filaire selon la revendication 2, caractérisée en ce qu'il est prévu au moins quatre conducteurs rayonnants.Wired antenna according to Claim 2, characterized in that at least four radiating conductors are provided. Antenne filaire selon la revendication 2 ou 3, caractérisée en ce que les conducteurs rayonnants sont disposés régulièrement autour de la périphérie de l'organe de support.Wired aerial according to claim 2 or 3, characterized in that the radiating conductors are arranged regularly around the periphery of the support member. Antenne filaire selon l'une quelconque des revendications précédentes, caractérisée en ce qu'une électrode intermédiaire de raccordement (4) est placée entre le câble coaxial (2) et l'élément d'extrémité rayonnant (3) et en ce qu'une électrode terminale (5) est placée à l'extrémité de cet élément d'extrémité rayonnant (3).Wired antenna according to one of the preceding claims, characterized in that an intermediate connection electrode (4) is arranged between the coaxial cable (2) and the radiating end element (3) and that terminal electrode (5) is placed at the end of this radiating end element (3).
EP14159877.1A 2013-03-15 2014-03-14 Wire antenna for the transmission of HF radiowaves on a submarine Active EP2779304B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1352345A FR3003388B1 (en) 2013-03-15 2013-03-15 WIRED ANTENNA FOR HF EMISSION BY A UNDERWATER

Publications (2)

Publication Number Publication Date
EP2779304A1 true EP2779304A1 (en) 2014-09-17
EP2779304B1 EP2779304B1 (en) 2021-12-22

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EP14159877.1A Active EP2779304B1 (en) 2013-03-15 2014-03-14 Wire antenna for the transmission of HF radiowaves on a submarine

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EP (1) EP2779304B1 (en)
ES (1) ES2909101T3 (en)
FR (1) FR3003388B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3064406A1 (en) * 2017-03-27 2018-09-28 Dcns BROADBAND WIRED ANTENNA FOR SUBMARINE ENGINE

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3049397B1 (en) 2016-03-22 2019-11-22 Thales BI-LOOP ANTENNA FOR IMMERSE ENGINE

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5933117A (en) * 1996-07-24 1999-08-03 The United States Of America As Represented By The Secretary Of The Navy Flexible ferrite loaded loop antenna assembly
GB2404444A (en) * 2003-07-28 2005-02-02 Statoil Asa Underwater transmitter antenna
FR2938980A1 (en) * 2008-11-24 2010-05-28 Mecabolier Floating active wire antenna for receiving or transmitting sea electric wave signals, has cover connected to tube by detachable connection unit that is opened at contact of water for being detached from tube and unwinding antenna wire
FR2962854A1 (en) 2010-07-15 2012-01-20 Thales Sa WIRED ANTENNA FOR HIGH FREQUENCY TRANSMISSION

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5933117A (en) * 1996-07-24 1999-08-03 The United States Of America As Represented By The Secretary Of The Navy Flexible ferrite loaded loop antenna assembly
GB2404444A (en) * 2003-07-28 2005-02-02 Statoil Asa Underwater transmitter antenna
FR2938980A1 (en) * 2008-11-24 2010-05-28 Mecabolier Floating active wire antenna for receiving or transmitting sea electric wave signals, has cover connected to tube by detachable connection unit that is opened at contact of water for being detached from tube and unwinding antenna wire
FR2962854A1 (en) 2010-07-15 2012-01-20 Thales Sa WIRED ANTENNA FOR HIGH FREQUENCY TRANSMISSION

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3064406A1 (en) * 2017-03-27 2018-09-28 Dcns BROADBAND WIRED ANTENNA FOR SUBMARINE ENGINE
WO2018178003A1 (en) * 2017-03-27 2018-10-04 Naval Group Wideband wired antenna for an underwater craft

Also Published As

Publication number Publication date
FR3003388A1 (en) 2014-09-19
ES2909101T3 (en) 2022-05-05
FR3003388B1 (en) 2015-04-17
EP2779304B1 (en) 2021-12-22

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