EP1163682B1 - Radiating cable - Google Patents
Radiating cable Download PDFInfo
- Publication number
- EP1163682B1 EP1163682B1 EP00910958A EP00910958A EP1163682B1 EP 1163682 B1 EP1163682 B1 EP 1163682B1 EP 00910958 A EP00910958 A EP 00910958A EP 00910958 A EP00910958 A EP 00910958A EP 1163682 B1 EP1163682 B1 EP 1163682B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cable
- radiating
- cable according
- wires
- insulated conductor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/20—Non-resonant leaky-waveguide or transmission-line antennas; Equivalent structures causing radiation along the transmission path of a guided wave
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/20—Non-resonant leaky-waveguide or transmission-line antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/203—Leaky coaxial lines
Definitions
- the present invention relates to a radiating cable used in particular in the field of cellular telephony or in local networks for wireless data transmission up to about 2.4 GHz.
- the radio coverage of large buildings often requires the installation of dedicated equipment. This coverage is achieved using antennas placed inside the buildings.
- radiating cables arranged in the corridors would be technically interesting, but it generates costs often prohibitive. Indeed, current radiating cables are coaxial cables with periodic slot patterns and are expensive, bulky, rigid and difficult to install.
- the object of the invention is to provide a low cost and easy to install radiating cable while having sufficient performance to ensure a satisfactory transmission of signals inside a building or a vehicle.
- a radiating cable comprising at least one cable section, each cable section comprising a pair of insulated conductor wires, each cable section comprising a free end to which the insulated conductor wires have first ends connected to a load equal to a characteristic impedance of the cable section, the insulated conductors having second ends connected to a connector opposite the first ends.
- the cable comprises at least two cable sections whose second ends are mounted in parallel on the connector. Given the equivalent impedance obtained by mounting the cable sections in parallel, it is thus possible to make a cable having an impedance adapted to the transmitter / receiver to which the radiating cable is connected while producing the radiating cable from sections of cables having a higher impedance, i.e. generally having better transmission performance than a single cable corresponding to the nominal impedance of the transmitter / receiver.
- the two cable sections are identical. This minimizes the storage requirements and the cable can be installed without the need to locate the cable sections.
- the radiating cable according to the particular embodiment illustrated comprises two cable sections generally designated 1, each comprising a pair of twisted insulated conductor wires 2 having first ends 3 connected to a load 4 and second ends 5 connected to a connector 6 according to a parallel connection.
- the two cable sections 1 are identical and are each made from a pair of solid copper conductors having a diameter of 1.38 mm covered with an insulator having a 2.2 mm thick of cellular polyethylene having an expansion ratio of 41% and covered with polyethylene skin with a thickness of 0.08 mm.
- the wire capacity thus produced is 210 pF / m and the insulator has a dielectric constant of 1.463.
- a cable section comprising a twisted pair made from insulated conductors as described above then have a characteristic impedance of 100 Ohms so that when connected to a load of 100 Ohms, the impedance of the cable section is maintained at 100 Ohms regardless of its length.
- each cable section has an equivalent impedance of 50 ohms corresponding to the nominal impedance usually required at the input / output of a transceiver.
- the cable thus produced is well balanced, both in the direction of emission and in the sense of reception, and taking into account the linear attenuation, each cable section has a length of up to about 100 meters for a transmission at 450 MHz, approximately 75 meters at 900 MHz, approximately 45 meters at 1800 MHz and approximately 35 meters at 2.4 GHz.
- the insulated conductors are held together by a dielectric ribbon 7 made of polyester, polypropylene or, more simply, of paper, but preferably of a material giving the cable a fire resistance such as a mineral ribbon in mica or glass silk.
- the dielectric strip 7 is covered with a series of helically wound metal strips 8, the edges being separated by an interval preferably of the order of one to two times the width of the metal strips so that at high frequency the metal ribbon improves the maintenance of the characteristic impedance of the radiating cable at a constant value while allowing a release of radiant energy through the interstices between the ribbons 8.
- the metal strips 8 can also be replaced by several metal wires wrapped around each of the insulated conductor wires.
- the cable section further preferably comprises a thin outer sheath 9 of thermoplastic material or elastomer.
- the cable according to the invention has been described according to an embodiment comprising identical cable sections connected in parallel, it is possible to provide different cable lengths either by their length or by their impedance. Depending on the structure of the area to be covered, it may indeed be interesting to use sections of cables with different performance, the weakening of each cable section being related to the average impedance thereof. In the case of cable lengths of different lengths, the cable with the highest impedance will preferably cover the longest area and the cable with the lowest impedance will cover the shortest area.
- the geometry of the premises to be covered is complex, it is also possible to envisage more than two cable sections connected in parallel, the characteristic impedance of each section of cable being chosen so that the equivalent impedance of the radiating cable corresponds to the nominal impedance of the transmitter / receiver used.
- the area to be covered is very small, for example in a small building or a vehicle, it is possible to favor the radiation at the expense of the linear attenuation and to provide a cable comprising a pair of parallel wires connected to the load. .
- the flexibility of the cable can be improved by replacing the solid conductors with strands of small conductive wires.
- the cable of the invention can also be made without metal ribbons and / or without dielectric ribbon.
Landscapes
- Communication Cables (AREA)
- Waveguide Aerials (AREA)
- Insulated Conductors (AREA)
Description
La présente invention concerne un câble rayonnant utilisé notamment dans le domaine de la téléphonie cellulaire ou dans des réseaux locaux de transmission de données sans fil jusqu'à environ 2,4 GHz.The present invention relates to a radiating cable used in particular in the field of cellular telephony or in local networks for wireless data transmission up to about 2.4 GHz.
La couverture radio des grands bâtiments nécessite souvent l'installation d'équipements dédiés. Cette couverture est réalisée à l'aide d'antennes placées à l'intérieur des bâtiments.The radio coverage of large buildings often requires the installation of dedicated equipment. This coverage is achieved using antennas placed inside the buildings.
L'utilisation de câbles rayonnants disposés dans les couloirs serait techniquement intéressante, mais elle engendre des coûts souvent rédhibitoires. En effet, les câbles rayonnants actuels sont des câbles coaxiaux à motifs de fentes périodiques et sont chers, encombrants, rigides et difficiles à poser.The use of radiating cables arranged in the corridors would be technically interesting, but it generates costs often prohibitive. Indeed, current radiating cables are coaxial cables with periodic slot patterns and are expensive, bulky, rigid and difficult to install.
Par ailleurs, pour le câblage de bâtiments, le niveau de performances élevé des câbles rayonnants actuels n'est pas nécessaire. Le but de l'invention est de proposer un câble rayonnant de faible coût et facile à poser tout en présentant des performances suffisantes pour assurer une transmission satisfaisante des signaux à l'intérieur d'un bâtiment ou d'un véhicule.In addition, for building wiring, the high performance level of existing radiating cables is not necessary. The object of the invention is to provide a low cost and easy to install radiating cable while having sufficient performance to ensure a satisfactory transmission of signals inside a building or a vehicle.
Selon l'invention on prévoit un câble rayonnant comportant au moins un tronçon de câble, chaque tronçon de câble: comprenant une paire de fils conducteurs isolés, chaque tronçon de câble comportant une extrémité libre à laquelle les fils conducteurs isolés ont des premières extrémités reliées à une charge égale à une impédance caractéristique du tronçon de câble, les fils conducteurs isolés ayant des secondes extrémités reliées à un connecteur à l'opposé des premières extrémités. On obtient ainsi un câble d'une très grande flexibilité et d'un faible encombrement qui peut être aisément fixé dans les couloirs d'un bâtiment en utilisant les techniques habituelles de fixation d'un simple câble téléphonique et qui présente en outre une impédance indépendante de sa longueur.According to the invention there is provided a radiating cable comprising at least one cable section, each cable section comprising a pair of insulated conductor wires, each cable section comprising a free end to which the insulated conductor wires have first ends connected to a load equal to a characteristic impedance of the cable section, the insulated conductors having second ends connected to a connector opposite the first ends. This gives a cable of great flexibility and compactness that can be easily fixed in the corridors of a building using the usual techniques of fixing a single telephone cable and which also has an independent impedance of its length.
Selon une version avantageuse de l'invention le câble comporte au moins deux tronçons de câble dont les secondes extrémités sont montées en parallèle sur le connecteur. Compte tenu de l'impédance équivalente obtenue en montant les tronçons de câbles en parallèle, on peut ainsi réaliser un câble présentant une impédance adaptée à l'émetteur/récepteur auquel le câble rayonnant est relié tout en réalisant le câble rayonnant à partir de tronçons de câbles présentant une impédance plus élevée, c'est-à-dire ayant généralement de meilleures performances de transmission qu'un câble unique correspondant à l'impédance nominale de l'émetteur/récepteur.According to an advantageous version of the invention the cable comprises at least two cable sections whose second ends are mounted in parallel on the connector. Given the equivalent impedance obtained by mounting the cable sections in parallel, it is thus possible to make a cable having an impedance adapted to the transmitter / receiver to which the radiating cable is connected while producing the radiating cable from sections of cables having a higher impedance, i.e. generally having better transmission performance than a single cable corresponding to the nominal impedance of the transmitter / receiver.
Selon encore un autre aspect avantageux de l'invention, les deux tronçons de câble sont identiques. On minimise ainsi les impératifs de stockage et le câble peut être installé sans nécessiter de repérage des tronçons de câble.According to yet another advantageous aspect of the invention, the two cable sections are identical. This minimizes the storage requirements and the cable can be installed without the need to locate the cable sections.
D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture de la description qui suit d'un mode de réalisation particulier non limitatif du câble rayonnant selon l'invention, en relation avec les figures ci-jointes parmi lesquelles :
- la figure 1 est une représentation schématique d'un câble rayonnant selon l'invention comportant deux tronçons de câble montés en parallèle,
- la figure 2 est une vue en perspective d'une portion de câble selon l'invention.
- FIG. 1 is a schematic representation of a radiating cable according to the invention comprising two cable sections connected in parallel,
- Figure 2 is a perspective view of a cable portion according to the invention.
En référence aux figures, le câble rayonnant selon le mode de réalisation particulier illustré comporte deux tronçons de câble généralement désignés en 1, comprenant chacun une paire de fils conducteurs isolés 2 torsadés ayant des premières extrémités 3 reliées à une charge 4 et des secondes extrémités 5 reliées à un connecteur 6 selon un montage en parallèle.With reference to the figures, the radiating cable according to the particular embodiment illustrated comprises two cable sections generally designated 1, each comprising a pair of twisted insulated
Dans ce mode de réalisation préféré, les deux tronçons de câble 1 sont identiques et sont chacun réalisés à partir d'une paire de conducteurs en cuivre massif ayant un diamètre de 1,38 mm recouvert d'un isolant ayant une épaisseur de 2,2 mm en polyéthylène cellulaire ayant un taux d'expansion de 41 % et recouvert d'une peau en polyéthylène d'une épaisseur de 0,08 mm. La capacité du fil ainsi réalisé est de 210 pF/m et l'isolant a une constante diélectrique de 1,463. Un tronçon de câble comportant une paire torsadée réalisée à partir de conducteurs isolés tels que décrits ci-dessus ont alors une impédance caractéristique de 100 Ohms de sorte que lorsqu'ils sont reliés à une charge de 100 Ohms, l'impédance du tronçon de câble est maintenue à 100 Ohms quelle que soit sa longueur. Deux tronçons de câble montés en parallèle ont une impédance équivalente de 50 Ohms correspondant à l'impédance nominale habituellement requise à l'entrée/sortie d'un émetteur/récepteur. Le câble ainsi réalisé est bien équilibré, aussi bien dans le sens de l'émission que dans le sens de la réception et en tenant compte de l'affaiblissement linéique, chaque tronçon de câble a une longueur pouvant aller jusqu'à environ 100 mètres pour une transmission à 450 MHz, environ 75 mètres à 900 MHz, environ 45 mètres à 1800 MHz et environ 35 mètres à 2,4 GHz.In this preferred embodiment, the two
Ainsi que cela est illustré par la figure 2, les conducteurs isolés sont maintenus assemblés par un ruban diélectrique 7 en polyester, polypropylène ou plus simplement en papier, mais de préférence en un matériau conférant au câble une tenue au feu telle qu'un ruban minéral en mica ou en soie de verre. Dans ce mode de réalisation, le ruban diélectrique 7 est recouvert d'une série de rubans métalliques 8 enroulés en hélice, les bords étant séparés par un intervalle de préférence de l'ordre de une à deux fois la largeur des rubans métalliques de sorte qu'à fréquence élevée le ruban métallique améliore le maintien de l'impédance caractéristique du câble rayonnant à une valeur constante tout en permettant une libération d'énergie rayonnante par les interstices entre les rubans métalliques 8. On peut également remplacer les rubans métalliques 8 par plusieurs fils métalliques guipés autour de chacun des fils conducteurs isolés.As is illustrated in FIG. 2, the insulated conductors are held together by a
Le tronçon de câble comporte en outre de préférence une gaine externe 9 mince en matière thermoplastique ou en élastomère.The cable section further preferably comprises a thin
Bien entendu l'invention n'est pas limitée au mode de réalisation particulier décrit et est susceptible de modifications sans sortir du cadre de l'invention tel que défini par les revendications.Naturally, the invention is not limited to the particular embodiment described and is subject to modifications without departing from the scope of the invention as defined by the claims.
En particulier, bien que le câble selon l'invention ait été décrit selon un mode de réalisation comportant des tronçons de câbles identiques montés en parallèle, on peut prévoir des tronçons de câbles différents soit par leur longueur soit par leur impédance. En fonction de la structure de la zone à couvrir, il peut en effet être intéressant d'utiliser des tronçons de câbles présentant des performances différentes, l'affaiblissement de chaque tronçon de câble étant en relation avec l'impédance moyenne de celui-ci. Dans le cas de tronçons de câbles de longueurs différentes, le câble ayant l'impédance la plus forte couvrira de préférence la zone la plus longue et le câble ayant l'impédance la plus faible couvrira la zone la plus courte.In particular, although the cable according to the invention has been described according to an embodiment comprising identical cable sections connected in parallel, it is possible to provide different cable lengths either by their length or by their impedance. Depending on the structure of the area to be covered, it may indeed be interesting to use sections of cables with different performance, the weakening of each cable section being related to the average impedance thereof. In the case of cable lengths of different lengths, the cable with the highest impedance will preferably cover the longest area and the cable with the lowest impedance will cover the shortest area.
Si la géométrie des locaux à couvrir est complexe on peut également envisager plus de deux tronçons de câbles montés en parallèle, l'impédance caractéristique de chaque tronçon de câble étant choisie pour que l'impédance équivalente du câble rayonnant corresponde à l'impédance nominale de l'émetteur/récepteur utilisé.If the geometry of the premises to be covered is complex, it is also possible to envisage more than two cable sections connected in parallel, the characteristic impedance of each section of cable being chosen so that the equivalent impedance of the radiating cable corresponds to the nominal impedance of the transmitter / receiver used.
Afin d'augmenter le rayonnement du câble on peut provoquer des déséquilibres entre les différents éléments du câble soit par des différences de dimensions ou des différences de capacités linéiques entre les différents fils conducteurs en faisant varier l'épaisseur ou la nature des matériaux isolants, soit en faisant varier le pas de torsion des fils conducteurs isolés, la variation de pas de torsion pouvant aller jusqu'à une inversion du sens de torsion et/ou un maintien des fils conducteurs isolés parallèles l'un à l'autre sur une portion de câble, le pas de l'hélice dans les parties torsadées étant de préférence de l'ordre de 15 à 30 fois le diamètre des conducteurs isolés et la longueur de chaque portion de torsion constante étant de l'ordre de dix fois le pas de l'hélice considérée ou de dix fois le pas de l'hélice adjacente dans le cas d'une portion de fils parallèles.In order to increase the radiation of the cable, it is possible to cause imbalances between the various elements of the cable either by differences in dimensions or differences in linear capacitances between the different conductor wires by varying the thickness or the nature insulating materials, either by varying the twist pitch of the insulated conductor wires, the variation of the twist pitch up to a reversal of the direction of twist and / or the holding of the parallel insulated conductive wires one to the another on a portion of cable, the pitch of the helix in the twisted portions being preferably of the order of 15 to 30 times the diameter of the insulated conductors and the length of each constant torsion portion being of the order of ten times the pitch of the helix considered or ten times the pitch of the adjacent helix in the case of a portion of parallel son.
Dans le cas où la zone à couvrir est très faible comme par exemple dans un bâtiment de petites dimensions ou un véhicule, on peut privilégier le rayonnement au dépend de l'affaiblissement linéique et prévoir un câble comportant une paire de fils parallèles reliés à la charge.In the case where the area to be covered is very small, for example in a small building or a vehicle, it is possible to favor the radiation at the expense of the linear attenuation and to provide a cable comprising a pair of parallel wires connected to the load. .
La souplesse du câble peut être améliorée en remplaçant les conducteurs massifs par des torons de petits fils conducteurs.The flexibility of the cable can be improved by replacing the solid conductors with strands of small conductive wires.
On peut également réaliser le câble de l'invention sans rubans métalliques et/ou sans ruban diélectrique.The cable of the invention can also be made without metal ribbons and / or without dielectric ribbon.
Claims (12)
- A radiating cable comprising at least one cable segment (1), each cable segment comprising a pair of insulated conductor wires (2), characterized in that each cable segment has a free end at which the insulated conductor wires have first ends (3) connected to a load (4) equal to a characteristic impedance of the cable segment, the insulated conductor wires having second ends (5) connected to a connector (6) opposite to the first ends (3).
- A radiating cable according to claim 1, characterized in that it comprises at least two cable segments whose second ends (5) are connected to the connector (6) in a parallel configuration.
- A radiating cable according to claim 2, characterized in that the two cable segments (1) are identical.
- A radiating cable according to any one of claims 1 to 3, characterized in that the pairs of insulated conductor wires (2) are placed in a supporting sheath (9).
- A radiating cable according to any one of claims 1 to 4, characterized in that the insulated conductor wires are twisted together, at least in part.
- A radiating cable according to claim 5, characterized in that the insulated conductor wires (2) are twisted at a pitch lying in the range about 15 times to about 30 times the diameter of the insulated wires.
- A radiating cable according to claim 4 or claim 6, characterized in that the wires are twisted alternately with right-handed twist and with left-handed twist.
- A radiating cable according to claim 7, characterized in that a portion of cable with right-handed twist is separated from a portion of cable with left-handed twist by a portion of cable in which the insulated wires are substantially parallel to each other.
- A radiating cable according to any one of claims 1 to 8, characterized in that it includes a dielectric tape (7) in contact with the insulated conductor wires.
- A radiating cable according to any one of claims 1 to 9, characterized in that it includes metal tapes wound helically without overlap around the pairs of insulated conductor wires.
- A radiating cable according to claim 10 as dependent on claim 9, characterized in that the metal tapes (10) extend between the dielectric tape (7) and the outer supporting sheath (9).
- A radiating cable according to any one of claims 1 to 11, characterized in that the two wires of the pair differ from each other in at least one parameter comprising: conductor diameter, conductor nature or structure, and the thickness or the nature of the insulation surrounding the conductors.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9903586A FR2791475B1 (en) | 1999-03-23 | 1999-03-23 | RADIANT CABLE |
| FR9903586 | 1999-03-23 | ||
| PCT/FR2000/000634 WO2000057431A1 (en) | 1999-03-23 | 2000-03-16 | Radiating cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1163682A1 EP1163682A1 (en) | 2001-12-19 |
| EP1163682B1 true EP1163682B1 (en) | 2006-12-27 |
Family
ID=9543518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00910958A Expired - Lifetime EP1163682B1 (en) | 1999-03-23 | 2000-03-16 | Radiating cable |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US6781051B1 (en) |
| EP (1) | EP1163682B1 (en) |
| JP (1) | JP2002540662A (en) |
| AU (1) | AU3298700A (en) |
| DE (1) | DE60032587T2 (en) |
| ES (1) | ES2277830T3 (en) |
| FR (1) | FR2791475B1 (en) |
| WO (1) | WO2000057431A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2868573B1 (en) * | 2004-04-02 | 2006-06-23 | Airbus France Sas | METHOD FOR OPTIMIZING AN ELECTRICAL WIRING, IN PARTICULAR IN THE AERONAUTICAL FIELD |
| FR2920918B1 (en) * | 2007-09-06 | 2009-10-23 | Nexans Sa | RADIANT CABLE. |
| FR3012661B1 (en) * | 2013-10-28 | 2015-12-04 | Labinal | METHOD FOR CHARACTERIZING A TORON OF ELECTRIC CABLES |
| EP2897217A1 (en) * | 2014-01-21 | 2015-07-22 | Delphi Technologies, Inc. | Device for impedance matching |
Family Cites Families (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2192344B1 (en) * | 1972-07-07 | 1975-03-07 | Thomson Csf | |
| GB1431243A (en) * | 1974-03-07 | 1976-04-07 | Standard Telephones Cables Ltd | Radiating cable arrangement |
| GB1583957A (en) * | 1977-03-10 | 1981-02-04 | Bicc Ltd | Electric cables |
| GB1597125A (en) * | 1977-08-24 | 1981-09-03 | Bicc Ltd | Radiating cables |
| US4339733A (en) * | 1980-09-05 | 1982-07-13 | Times Fiber Communications, Inc. | Radiating cable |
| US4413469A (en) * | 1981-03-23 | 1983-11-08 | Allied Corporation | Method of making low crosstalk ribbon cable |
| US4404424A (en) * | 1981-10-15 | 1983-09-13 | Cooper Industries, Inc. | Shielded twisted-pair flat electrical cable |
| US4432193A (en) * | 1982-09-20 | 1984-02-21 | 501 Control Data Canada, Ltd. | Method of grading radiating transmission lines |
| US4837405A (en) * | 1986-12-18 | 1989-06-06 | Maillefer S. A. | Segmented electric cable arrangement |
| US4860343A (en) * | 1986-12-22 | 1989-08-22 | Zetena Jr Maurice F | Composite cable for use in high frequency data and voice transmission |
| US5247270A (en) * | 1987-12-01 | 1993-09-21 | Senstar Corporation | Dual leaky cables |
| US4885747A (en) * | 1988-02-17 | 1989-12-05 | International Business Machines Corp. | Broadband and baseband LAN |
| US5010399A (en) * | 1989-07-14 | 1991-04-23 | Inline Connection Corporation | Video transmission and control system utilizing internal telephone lines |
| CA2010390A1 (en) * | 1990-02-20 | 1991-08-20 | Robert Keith Harman | Open transmission line locating system |
| US5113159A (en) * | 1990-02-22 | 1992-05-12 | At&T Bell Laboratories | Communications transmission system including facilities for suppressing electromagnetic interference |
| FR2665311B1 (en) * | 1990-07-30 | 1994-03-25 | Alcatel Cable | RADIO TRANSMISSION DEVICE WITH RADIANT CABLES. |
| FR2686727B1 (en) * | 1992-01-28 | 1997-01-31 | Filotex Sa | ELECTRIC CONDUCTOR AND ELECTRIC CABLE CONTAINING SUCH A CONDUCTOR. |
| US5321372A (en) * | 1993-01-08 | 1994-06-14 | Synoptics Communications, Inc. | Apparatus and method for terminating cables to minimize emissions and susceptibility |
| US5381348A (en) * | 1993-01-11 | 1995-01-10 | Fluke Corporation | Token ring local area network testing apparatus using time delay reflectory |
| US5348397A (en) * | 1993-03-29 | 1994-09-20 | Ferrari R Keith | Medical temperature sensing probe |
| FR2726708B1 (en) * | 1994-11-09 | 1997-01-31 | Peugeot | DEVICE FOR ADAPTING A LINE INTERFACE OF A STATION CONNECTED TO A MULTIPLEXED INFORMATION TRANSMISSION NETWORK |
| JP3233861B2 (en) * | 1996-10-31 | 2001-12-04 | 住友電装株式会社 | Insulated conductor pair and induction cable using this insulated conductor pair |
| FR2771859B1 (en) | 1997-11-28 | 1999-12-31 | Telecommunications Sa | RADIANT CABLE |
| US6195561B1 (en) * | 1998-07-03 | 2001-02-27 | Tunnel Radio Of America, Inc. | Antenna system for two-way UHF underground radio system |
-
1999
- 1999-03-23 FR FR9903586A patent/FR2791475B1/en not_active Expired - Fee Related
-
2000
- 2000-03-16 JP JP2000607228A patent/JP2002540662A/en active Pending
- 2000-03-16 WO PCT/FR2000/000634 patent/WO2000057431A1/en active IP Right Grant
- 2000-03-16 DE DE60032587T patent/DE60032587T2/en not_active Expired - Lifetime
- 2000-03-16 AU AU32987/00A patent/AU3298700A/en not_active Abandoned
- 2000-03-16 EP EP00910958A patent/EP1163682B1/en not_active Expired - Lifetime
- 2000-03-16 ES ES00910958T patent/ES2277830T3/en not_active Expired - Lifetime
- 2000-03-16 US US09/937,033 patent/US6781051B1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP1163682A1 (en) | 2001-12-19 |
| ES2277830T3 (en) | 2007-08-01 |
| FR2791475A1 (en) | 2000-09-29 |
| DE60032587T2 (en) | 2007-10-04 |
| AU3298700A (en) | 2000-10-09 |
| DE60032587D1 (en) | 2007-02-08 |
| WO2000057431A1 (en) | 2000-09-28 |
| JP2002540662A (en) | 2002-11-26 |
| FR2791475B1 (en) | 2007-02-23 |
| US6781051B1 (en) | 2004-08-24 |
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