EP2779304B1 - 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
EP2779304B1
EP2779304B1 EP14159877.1A EP14159877A EP2779304B1 EP 2779304 B1 EP2779304 B1 EP 2779304B1 EP 14159877 A EP14159877 A EP 14159877A EP 2779304 B1 EP2779304 B1 EP 2779304B1
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EP
European Patent Office
Prior art keywords
radiating
wire antenna
antenna
conductors
transmission
Prior art date
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Active
Application number
EP14159877.1A
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German (de)
French (fr)
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EP2779304A1 (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
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Naval Group SA
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Publication of EP2779304A1 publication Critical patent/EP2779304A1/en
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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 HF transmission by an underwater vehicle.
  • this type of antenna has a coaxial cable and a radiating end element.
  • This assembly is then for example towed by the underwater vehicle and drags behind it.
  • the antennas known in the state of the art have a certain number of drawbacks, in particular at the level of their very limited performance due to the impedance mismatch of this antenna, which results in reduced transmission efficiency.
  • the aim of the invention is therefore to resolve these problems.
  • the subject of the invention is a wire antenna for HF transmission by an underwater vehicle according to claim 1.
  • these figures illustrate a wire antenna for HF transmission by an underwater vehicle such as a submarine proper.
  • 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 towed behind an underwater vehicle such as a submarine proper and rises to the surface of the water (at 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 has a terminal electrode 5.
  • the radiating end element also consists of a single-stranded member.
  • this element is formed by a multistrand member.
  • This multi-stranded member is formed by a support member which can also be called a core, at the periphery of which are distributed several radiating conductors carried by this support member and ensuring the 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 stranded end of the element 3 of this antenna, as well as a possible recovery of a braid in the sea. of this coaxial cable.
  • the terminal electrode 5 conventionally enables the radiating element to be terminated.
  • Such a structure has a number of advantages over antenna systems of the state of the art.
  • the buoyancy of the multi-strand antenna end of the wire antenna according to the invention is greater than that of a single-strand configuration of the coaxial type, due to a lower weight.
  • This definition is essential for the envisaged application because transmission in HF band is only possible with an antenna perfectly on the dioptre, that is to say on the surface of the water.
  • the attenuation of the HF signal when passing through this diopter is such that a slightly submerged antenna does not function correctly in transmission.
  • the four radiating conductors for example from the multi-strand 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 such as the length of the various portions of the antenna for example make it possible to define, for example, a passband of the wire antenna in HF band, for example on the basis of a transmission in ⁇ / 4 at the frequency of 2 megahertz ie the bottom of the HF band.
  • the radiating end is made up, for example, of four regularly distributed conductors.
  • the conductors placed in short circuit or not are connected at the level of the terminal electrode by an operation, for example mechanical.

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 HF transmission 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 from the document FR A 2 962 854 , wire antennas for this type of application.

En règle générale, ce type d'antenne comporte un câble coaxial et un élément d'extrémité rayonnant.Typically, this type of antenna has 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 assembly 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.However, the antennas known in the state of the art have a certain number of drawbacks, in particular at the level of their very limited performance due to the impedance mismatch of this antenna, which results in reduced transmission efficiency.

Le but de l'invention est donc de résoudre ces problèmes.The aim of the invention is therefore to resolve these problems.

A cet effet l'invention a pour objet une antenne filaire pour une émission HF par un engin sous-marin selon la revendication 1.To this end, the subject of the invention is a wire antenna for HF transmission by an underwater vehicle according to claim 1.

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 characteristics of the antenna according to the invention, taken alone or in combination:
  • the multi-stranded member comprises a support member at the periphery of which several radiating conductors are arranged;
  • at least four radiating conductors are provided;
  • the radiating conductors are arranged regularly around the periphery of the support member;
  • an intermediate connection electrode is placed between the coaxial cable and the radiating end element and a terminal 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 will follow, given solely by way of example and made 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
  • the figures 2 and 3 respectively show exploded views of intermediate and terminal electrodes forming part of 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.In fact, these figures illustrate a wire antenna for HF transmission by an underwater vehicle such as a submarine proper.

Sur ces figures, et en particulier sur la figure 1, l'antenne est désignée par la référence générale 1.In these figures, and in particular 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.Conventionally, 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 emorquée 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 towed behind an underwater vehicle such as a submarine proper and rises to the surface of the water (at 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 has 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.The function of these electrodes is respectively to allow the two portions of this cable to be connected together for the electrode 4 and to terminate the latter 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 also consists of a single-stranded 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 multistrand member.

Cet organe multibrins est formé par un organe de support que l'on peut également appeler une âme, à la périphérie duquel sont répartis plusieurs conducteurs rayonnants portés par cet organe de support et assurant les échanges.This multi-stranded member is formed by a support member which can also be called a core, at the periphery of which are distributed several radiating conductors carried by this support member and ensuring the 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 stranded end of the element 3 of this antenna, as well as a possible recovery of a braid in the sea. 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 enables the radiating element to be terminated.

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 antenna systems of the state of the art.

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 multi-strand antenna end of the wire antenna according to the invention is greater than that of a single-strand configuration of the coaxial type, due to 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 envisaged application because transmission in HF band is only possible with an antenna perfectly on the dioptre, 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 HF signal when passing through this diopter is such that a slightly submerged antenna does not function correctly 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 from the multi-strand 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-stranded end solution centered inside the coaxial cable, the integration of several conductors at the periphery of the support member ensures greater 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 at or above this diopter greatly improves the efficiency of transmission 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 such as the length of the various portions of the antenna for example make it possible to define, for example, a passband of the wire antenna in HF band, for example on the basis of a transmission in λ / 4 at the frequency of 2 megahertz ie the bottom of the HF band.

L'extrémité rayonnante est composée par exemple de quatre conducteurs régulièrement répartis.The radiating end is made up, 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 conductors can of course be considered as well as a different 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. The 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 still other embodiments can be envisaged.

Claims (4)

  1. A wire antenna suitable for emitting at high frequencies, intended to be towed by an underwater vehicle, said wire antenna including:
    - a coaxial cable (2), intended to be connected to the underwater vehicle;
    - a radiating end element (3), able to float on the surface of the water; and
    - an intermediate electrode (4), connecting the coaxial cable (2) to the radiating end element (3);
    the wire antenna being characterized in that the radiating end element (3) includes a support member, at the periphery of which several radiating conductors are arranged.
  2. The wire antenna according to claim 1, characterized in that the radiating end element (3) includes at least four radiating conductors.
  3. The wire antenna according to claim 1 or 2, characterized in that the radiating conductors are arranged evenly around the periphery of the support member.
  4. The wire antenna according to any one of the preceding claims, characterized in that an end electrode (5) is placed at one end of the radiating end element (3) opposite the intermediate electrode (4).
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 EP2779304A1 (en) 2014-09-17
EP2779304B1 true 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
RU2813857C1 (en) * 2023-06-07 2024-02-19 Акционерное общество "Концерн "Центральный научно-исследовательский институт "Электроприбор" Towed floating cable antenna device

Families Citing this family (2)

* 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
FR3064406B1 (en) * 2017-03-27 2019-04-26 Dcns BROADBAND WIRED ANTENNA FOR SUBMARINE ENGINE

Family Cites Families (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
GB2404444B (en) * 2003-07-28 2006-11-29 Statoil Asa Transmitter antena
FR2938980B1 (en) * 2008-11-24 2010-12-31 Mecabolier WIRED ACTIVE ANTENNA FOR DIVINE DIVING
FR2962854B1 (en) * 2010-07-15 2013-05-10 Thales Sa WIRED ANTENNA FOR HIGH FREQUENCY TRANSMISSION

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2813857C1 (en) * 2023-06-07 2024-02-19 Акционерное общество "Концерн "Центральный научно-исследовательский институт "Электроприбор" Towed floating cable antenna device

Also Published As

Publication number Publication date
ES2909101T3 (en) 2022-05-05
FR3003388A1 (en) 2014-09-19
FR3003388B1 (en) 2015-04-17
EP2779304A1 (en) 2014-09-17

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