EP0568048B1 - Datenübertragungskabel - Google Patents

Datenübertragungskabel Download PDF

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Publication number
EP0568048B1
EP0568048B1 EP93106912A EP93106912A EP0568048B1 EP 0568048 B1 EP0568048 B1 EP 0568048B1 EP 93106912 A EP93106912 A EP 93106912A EP 93106912 A EP93106912 A EP 93106912A EP 0568048 B1 EP0568048 B1 EP 0568048B1
Authority
EP
European Patent Office
Prior art keywords
data transmission
frequency
transmission cable
cores
mhz
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
Application number
EP93106912A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0568048A2 (de
EP0568048A3 (enrdf_load_stackoverflow
Inventor
Marco Glaus
Beat Schmucki
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.)
Daetwyler IT Infra AG
Original Assignee
Daetwyler AG Kabel und Systeme
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6878895&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0568048(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Daetwyler AG Kabel und Systeme filed Critical Daetwyler AG Kabel und Systeme
Publication of EP0568048A2 publication Critical patent/EP0568048A2/de
Publication of EP0568048A3 publication Critical patent/EP0568048A3/xx
Application granted granted Critical
Publication of EP0568048B1 publication Critical patent/EP0568048B1/de
Anticipated expiration legal-status Critical
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H01B7/1895—Internal space filling-up means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/02—Cables with twisted pairs or quads
    • H01B11/06—Cables with twisted pairs or quads with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens
    • H01B11/10—Screens specially adapted for reducing interference from external sources

Definitions

  • the invention relates to a data transmission cable with a standard impedance of 150 ⁇ .
  • Such data transmission cables are used for example in the "IBM PC world” for data transmission between two devices.
  • the term “150 ⁇ impedance standard” stands for the specifically specified parameters - which must be observed precisely by the cable - for example, the impedance or wave impedance, damping, near-end crosstalk attenuation, etc.
  • the term “150 ⁇ ” is used here not exactly limited to the numerical value itself, but rather denotes the central value of a tolerance band in the "IBM world” of suitable cable impedances, for example between 135 ⁇ and 165 ⁇ .
  • This data transmission cable ensures the 150 ⁇ impedance standard of the IBM world and is suitable, for example, for the connection or data transmission between a patch panel device and a computer.
  • the electrical properties of the individual Cores of a pair of cores equal to earth. This results, for example, in a pair of wires with a defined capacitance and inductance covering, or with a defined impedance (characteristic impedance).
  • the TYP-1 connector has an external dimension in the order of several centimeters (e.g. 1cm ⁇ 4cm), which is too large for many applications.
  • a television signal transmission cable is known with 2 wires, each consisting of a conductor and an insulating sleeve.
  • the respective conductor has a diameter of less than 1 mm.
  • the 2 wires are wrapped with a shield.
  • the aim of the present invention is to provide a data transmission cable which at least largely does justice to the increasing integration density of microelectronics.
  • a data transmission cable with a standard impedance of 150 ⁇ , with four wires, each consisting of a conductor and an insulating sleeve, with diagonally opposite wires forming a pair of wires for the transmission of electromagnetic waves, the wires of the wires forming the corner points of a square and thereby according to Art of a star quad are twisted together, the diameter of the individual cores being approx. 1 mm or less, the geometry of the star quad is fixed by an intermediate sheath formed around the star quad, a shielding foil is wrapped around the four cores on the outside, and the shielding foil is also completely covered by wrapped around an overall screen and finally the overall screen is still completely surrounded by a preferably flexible outer jacket (claim 1).
  • the data transmission cable according to the invention enables the use of approximately two to four times smaller plugs.
  • the use of smaller plugs in turn opens the space for a higher integration density of the devices, e.g. in the patch panel area.
  • a cable is created that is suitable, for example, for a connection to an AMP connector or RJ-45 connector, so that these connectors can be used for the first time to achieve a high integration density in the 150 ⁇ world.
  • the star quad ensures a completely symmetrical structure of the cable, so that the electrical properties of all individual wires to earth are the same.
  • there is an essentially circular outer shape of the cable which ensures easy processing: the cable is particularly flexible on all sides. It also ensures that the four wires are within of the data transmission cable are arranged with optimal use of the space available to them. Due to the stranding in the manner of a star quad, the surfaces of the individual insulation of the four wires lie close together. They thus form the spatially least complex solution of an arrangement of four cores and essentially achieve the electrical specifications and values as with a conventional "large" data transmission cable of the 150 ohm impedance standard.
  • This arrangement of the four wires also provides the most resistant and stable form of wire arrangement with respect to external pressurization. Since the four wires run essentially symmetrically around the longitudinal axis of the cable, each with the same own cross section, the cross section of the data transmission cable has the circular shape already mentioned. In addition to the advantage of a special internal stability compared to external pressurization - and the associated securing of the basic electrical parameters - this construction has the advantage for a data transmission cable of the 150 ⁇ impedance standard that no spirals occur when the cable is pulled in and the assembly process is not inhibited.
  • the intermediate sheath ensures a clearly defined guidance of the inner wire pairs and thus contributes significantly to the realization of the data transmission cable according to the invention.
  • the intermediate jacket consists of a plastic foam, in particular a frangible plastic foam, or a solid material (claim 2).
  • a plastic foam in particular a frangible plastic foam, or a solid material (claim 2).
  • the cable designed in this way is also particularly easy to install. After easy assembly and processing, there is in particular This is a great need for extremely thin cables, because the technician has to work very precisely and, for example, take special care when stripping.
  • the present variant of the invention does justice to this fact.
  • the intermediate sheath no longer has to be cut out and cut out, but can simply be "broken up” or “broken off” during installation on site, if necessary. This results in a noticeable simplification and shortening of the work required for installation. Especially in view of the often very large number of device connections to be made, the savings made on this work step requiring great attention should not be underestimated.
  • the flexibility of the entire cable is well guaranteed by the insulating sleeves of the individual wires and by the outer jacket.
  • the idea of the intermediate sheath described here takes advantage of this fact in that, contrary to the usual way - to make all cable sheaths and insulating sleeves of the data transmission cable flexible - the intermediate sheath, for which a slightly lower flexibility is sufficient, is made of a breakable plastic foam.
  • the data transmission cable has a plastic film arranged on the inner wall of the intermediate sheath (claim 3).
  • the plastic film lying on the inside of the intermediate sheath is placed around the wires during cable production before the intermediate sheath is applied. It facilitates the application of the intermediate sheath during manufacture and serves to ensure that the intermediate sheath sticks to the wires.
  • the individual conductors consist of flexible seven-fold or multiple strands, in particular of bare, tinned or galvanized copper strands (claim 4).
  • the use of individual strands contributes significantly to achieving flexibility.
  • two pairs of wires are twisted together (claim 8).
  • the twisted pair ensures the symmetry of the single wire pair against earth with a higher operating capacity.
  • a data transmission cable 1 consists of four wires 2A, 2B, 3A, 3B, the diagonally opposite wires 2A and 2B as well as 3A and 3B each forming an associated wire pair 2, 3 for transmitting electromagnetic waves.
  • the individual wires 2A, 2B, 3A, 3B have a diameter of approximately 1 mm. Their respective diameter is preferably less than 0.99 mm.
  • the data transmission cable 1 is thus particularly advantageously suitable for small plugs - for example “RJ45” or AMP plugs.
  • Such plugs for penetration technology - for cords with Lahn or mixed strands - can be used for round or flat-oval cords or cables.
  • a one-piece housing with pre-assembled contacts is standardized according to FCC guidelines and the telephone industry.
  • the plugs are available with different numbers of poles and in different versions.
  • semi or fully automatic processing is possible (UL listed under E-81956 specification; technical data: product specification: 108-1163 or 1173; processing specification 114-6016).
  • the plugs typically have external dimensions of approx. 10 mm ⁇ 5 mm, the distance between the individual plug contacts being approx. 1 mm.
  • the individual wires are adapted to this distance.
  • the diameter of the cable core is on the order of a few mm.
  • the data transmission cable according to the invention is easily adaptable to the geometries of these connectors.
  • each wire 2A, 2B, 3A, 3B consists of a metallic conductor 4, which is used for the transmission of electrical charge carriers, the individual conductors 4 having a diameter which is much smaller than 1 mm.
  • the structure of the individual conductors from braided strand, in particular from seven-fold copper strand (skin effect) is not shown.
  • the individual wires 2A, 2B, 3A, 3B each have an insulating sleeve 5 surrounding the conductor 4.
  • the wires 2A, 2B, 3A, 3B are equidistant from a central longitudinal axis C of the data transmission cable 1. In this case, the wires 2A, 2B, 3A, 3B with surface sections of their respective insulating sleeves 5 abut one another in a line in the cross section of FIG. 1.
  • the conductors 4 of the wires 2A, 2B, 3A, 3B form the corner points of a square. They are twisted together like a star four. This is shown in addition in FIG. 3.
  • the geometry of the star quad is fixed by an intermediate jacket 7 formed around the star quad, which ensures additional mechanical protection of the thin wires 2A, 2B, 3A, 3B.
  • the intermediate jacket 7 is advantageously made of a foamed plastic.
  • the foamed plastic lies tightly around the cable core during the manufacture of the cable. The resulting advantages in the installation of the cable have already been explained in detail above.
  • the intermediate jacket 7 is also shown separately in FIG. 2 for the sake of clarity.
  • a shielding film 8 is wound around the four wires on the outside. It is used to shield high frequencies. This shielding film 8 is furthermore completely surrounded or wrapped by an overall shield 9, in particular made of copper braid. This overall screen 9 serves to shield the low-frequency range. Finally, the entire screen 9 is completely enclosed by a preferably flexible outer jacket 10. The diameter of the entire cable is typically 5 to 6 mm.
  • a data transmission cable with the following specific properties with a wire diameter of less than 1 mm: an impedance between 135 ⁇ and 165 ⁇ in the frequency range between 3 Mhz and 20 Mhz, an impedance between 200 ⁇ and 270 ⁇ in the frequency range 38.4 kHz, an insulation resistance greater than 16000 M ⁇ * km with a DC voltage 500V and an earth asymmetry (capacitive unbalance) less than 1500 pF / km at a frequency of 1kHz.
  • the data transmission cable shown schematically in cross section in FIG. 1 also has the following near-cross talk characteristic: at a frequency of 9.5 kHz:> 80dB, at a frequency of 38.4 kHz:> 75dB, at a frequency of 3 to 5 MHz:> 58dB, and at a frequency of 12 to 20 MHz:> 40dB.
  • the following damping characteristics can also be implemented: at a frequency of 9.6 kHz: ⁇ 10 dB / km, at a frequency of 38.4 kHz: ⁇ 15 dB / km, at a frequency of 4 MHz: ⁇ 76 dB / km, at a frequency of 16 MHz: ⁇ 150 dB / km.
  • Attenuation values are typical: at a frequency of 9.6 kHz: approximately 5.6 dB / km, at a frequency of 38.4 kHz: approximately 8 dB / km, at a frequency of 4 MHz: approximately 38 dB / km km, at a frequency of 16 MHz: ⁇ approximately 75 dB / km. With a test voltage of 900V / 50Hz, no breakdown occurs at 1 min.
  • the data transmission cable according to the invention thus ensures excellent electrical characteristics.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Communication Cables (AREA)
EP93106912A 1992-04-28 1993-04-28 Datenübertragungskabel Expired - Lifetime EP0568048B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9205694U DE9205694U1 (de) 1992-04-28 1992-04-28 Datenübertragungskabel
DE9205694U 1992-04-28

Publications (3)

Publication Number Publication Date
EP0568048A2 EP0568048A2 (de) 1993-11-03
EP0568048A3 EP0568048A3 (enrdf_load_stackoverflow) 1994-01-26
EP0568048B1 true EP0568048B1 (de) 1996-08-14

Family

ID=6878895

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93106912A Expired - Lifetime EP0568048B1 (de) 1992-04-28 1993-04-28 Datenübertragungskabel

Country Status (3)

Country Link
EP (1) EP0568048B1 (enrdf_load_stackoverflow)
AT (1) ATE141439T1 (enrdf_load_stackoverflow)
DE (2) DE9205694U1 (enrdf_load_stackoverflow)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2698477B1 (fr) * 1992-11-23 1994-12-23 Filotex Sa Câble de transmission de signaux haute fréquence.
DE4307807A1 (de) * 1993-03-12 1994-09-15 Rheydt Kabelwerk Ag Elektrisches Datenübertragungselement
FR2735605B1 (fr) * 1995-06-15 1997-07-11 Filotex Sa Cable electrique de transmission de signaux a haute frequence et procede de fabrication du cable
DE29808657U1 (de) * 1998-05-14 1999-08-12 Siemens AG, 80333 München Elektrisches Signalübertragungskabel
DE20016527U1 (de) 2000-09-23 2000-11-30 Alcatel, Paris Elektrische Installationsleitung
DE102020110370A1 (de) * 2020-04-16 2021-10-21 Leoni Kabel Gmbh Kabel zur elektrischen Datenübertragung
DE102020116643A1 (de) * 2020-06-24 2021-12-30 Kromberg & Schubert GmbH Cable & Wire Datenleitung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4777324A (en) * 1987-03-30 1988-10-11 Noel Lee Signal cable assembly with fibrous insulation
FR2637117A1 (fr) * 1988-09-27 1990-03-30 Acome Soc Coop Travailleurs Cable de teledistribution pour la transmission de signaux de television
DE9216118U1 (de) * 1992-04-28 1993-02-25 Dätwyler AG Kabel und Systeme, Altdorf Kabel

Also Published As

Publication number Publication date
ATE141439T1 (de) 1996-08-15
DE59303400D1 (de) 1996-09-19
EP0568048A2 (de) 1993-11-03
DE9205694U1 (de) 1992-07-30
EP0568048A3 (enrdf_load_stackoverflow) 1994-01-26

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