EP2965327B1 - Câble coaxial - Google Patents

Câble coaxial Download PDF

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Publication number
EP2965327B1
EP2965327B1 EP14709899.0A EP14709899A EP2965327B1 EP 2965327 B1 EP2965327 B1 EP 2965327B1 EP 14709899 A EP14709899 A EP 14709899A EP 2965327 B1 EP2965327 B1 EP 2965327B1
Authority
EP
European Patent Office
Prior art keywords
shield
coaxial cable
central conductive
wires
wire
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.)
Active
Application number
EP14709899.0A
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German (de)
English (en)
Other versions
EP2965327A1 (fr
Inventor
Graziano ROSSIN
Tiziano ALEOTTI
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.)
Ask Industries SpA
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Ask Industries SpA
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Priority to PL14709899T priority Critical patent/PL2965327T3/pl
Publication of EP2965327A1 publication Critical patent/EP2965327A1/fr
Application granted granted Critical
Publication of EP2965327B1 publication Critical patent/EP2965327B1/fr
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    • 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
    • H01B11/18—Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor
    • H01B11/1808—Construction of the conductors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
    • H01B1/023—Alloys based on aluminium

Definitions

  • the present patent application for industrial invention relates to a coaxial cable.
  • a coaxial cable comprises a central conductive wire intended to transport an electrical signal, a peripheral shield intended to be connected to a mass to shield the interference on the central conductive wire, a dielectric material interposed between the central conductive wire and the peripheral shield to insulate the central conductive wire of the peripheral shield, and an insulating sheath that surrounds the peripheral shield.
  • the peripheral shield is generally composed of conductive wires that form a mesh, also called "bonding jumper".
  • the central conductive wire and the wires of the bonding jumper of coaxial cables that are available on the market are generally made of pure copper.
  • CCA Copper Clad Aluminum
  • EP1469486A1 discloses a conductive wire in which the core and the mass are made of CCA concentric sheets folded in a tubular shape.
  • This type of cable finds a special application in the TV industry (therefore static applications) and cannot be applied in large consumption dynamic sectors, such as the automotive industry, for a series of factors related to the complexity of the production process and to the mechanical properties of the tubular conductive wires made with bent copper sheets. In fact, such type of cable is too expensive, has a limited flexibility, and is subject to breakage during bending tests.
  • GB1310334A discloses a coaxial cable in which the central conductive wire is made with a single wire that can be made of CCA, insulated from the external metal sheet, which represents the shielding, by a series of plastic disks. This type of cable cannot be applied in the standard connectors of the automotive industry without making very high investments to modify the connectors.
  • This solution is mechanically very weak and prevents the cable from being connected with other elements, such as clips (which would deform the internal structure of the cable when the clip is pulled), or other connections because the bonding operation (element that keeps the cables together) occurs with tensions and tractions that change the geometry of the cable, thus altering its performance.
  • This type of coaxial cable is not suitable for the automotive sector and is typically used for static applications that require a low resistance at repeated bending cycles.
  • US6265667B1 disclosed a coaxial cable with a central conductive unit and a bonding jumper made of multiple CCA wires.
  • the central conductive unit can comprise multiple CCA twisted wires.
  • the patent document describes how to prevent the oxidation of the metals used for the cable. While on one side it extends the life of the product (which can be stocked for a long time and can be transported in extreme conditions), on the other side the anti-oxidation substance limits the electrical conductivity and weldability of the metal parts that must be suitably cleaned before being machined in order to obtain the best qualitative result for a special operation such as welding. The process is expensive and impaired by quality problems for products that need to be assembled in large series.
  • the purpose of the present invention is to remedy the drawbacks of the prior art by providing a coaxial cable that is efficient, efficacious and at the same time inexpensive and simple to make.
  • the coaxial cable of the invention comprises:
  • the central conductive unit and the shield comprise a plurality of wires made with an aluminum core coated with a copper coating.
  • the wires of the shield comprise a tin external coating.
  • the coaxial cable of the invention is disclosed and generally indicated with reference numeral (100).
  • the coaxial cable (100) comprises:
  • the coaxial cable (100) optionally comprises a second shield (3) between the dielectric material (2) and the first shield (4).
  • the central conductive unit (1) is intended to transport electrical signals.
  • the central conductive unit (1) comprises a plurality of suitably disposed conductive wires (10).
  • each conductive wire (10) of the central conductive unit is made with copper clad aluminum (CCA) technology and comprises an aluminum core (11) and a copper coating (12).
  • CCA copper clad aluminum
  • the conductive wire (10) has a total diameter that can vary from 0.1mm to 1mm, preferably 0.27 mm, according to the application.
  • the aluminum core (11) has a diameter of 90-97%, preferably 95% of the total diameter of the wire and the thickness of the copper coating is 10-7%, preferably 5% of the total diameter of the wire.
  • each wire of the central conductive wire can be additionally covered with a tin external layer (13) with thickness equal to 0.5% - 2% of the total diameter of the wire.
  • the tin external layer (13) is used to make the conductive wire immune from oxidation and keep its weldability characteristics unaltered over time.
  • the central conductive unit (1) is composed of a straight central conductive wire (10a) and a plurality of peripheral conductive wires (10b) wound around the central conductive wire (10a) in a spiral beam.
  • the spiral beam formed of the peripheral conductive wires (10a) develops by winding along the straight central conductive wire (10a) using it as axis of the spiral.
  • the figures illustrate an embodiment of the central conductive unit (1) that comprises seven wires, i.e. one central wire and six peripheral wires.
  • the peripheral wires (10b) are wound to the central wire (10a) forming a spiral beam with winding pitch of 15-20mm.
  • the winding pitch of the spiral can have different values, according to the dimensions of the wire and to the number of wires used to make the central conductive unit (1).
  • Such a manufacturing technique of the central conductive unit (1) can be industrially automated with the use of suitable machines and with low production costs.
  • Such a disposition of the conductive wires (10) of the central conductive unit is used to improve the mechanical performance of the central conductive unit (1).
  • a solid one-wire conductive wire or a linear beam of parallel wires cannot withstand a high number of repeated bends of the coaxial cable (100), which are due to the manipulation, production and installation required in special applications, such as in the automotive sector.
  • the coaxial cable (100) of the invention wherein the central conductive wire (1) is obtained with such a manufacturing technique, is more flexible, more resistant to bends in any direction and easier to compress during the crimping of connectors.
  • the central conductive unit (1) of the coaxial cable according to the invention is not provided with twisted wires, i.e. wires that are mutually twisted for the entire length of the cable.
  • the central conductive unit (1) of multi-wire type is obtained with a process according to which the remaining wires are disposed around a central wire by means of bending, not twisting. This allows obtaining a compact beam of wires and avoiding the presence of air between the wires.
  • the dielectric material (2) is made of expanded polyethylene or polypropylene, and has a diameter comprised between 1.5 and 3 mm, preferably 2.1 mm.
  • the coaxial cable (100) advantageously has two shield levels (4, 3).
  • the first shield (4) comprises a plurality of conductive wires (40) twisted in such manner to form a mesh intended to be connected to a mass. For this reason the first shield (4) is also known as bonding jumper (4).
  • each conductive wire (40) of the bonding jumper is of CCA type and comprises an aluminum core (41), an intermediate copper coating (42) and a tin external coating (43).
  • the bonding jumper (4) is composed of a set of wires (40) that are twisted with a suitable twist pitch.
  • Each wire (40) can have a total diameter that, according to the specific application, can vary from 0.1 mm to 0.2 mm with a thickness of the copper coating (42) equal to 6% of the total diameter.
  • the copper layer (42) is additionally covered with the tin layer (43) in a percentage that can vary from 0.5% to 2% of the total wire diameter according to the specific application.
  • the tin coating (43) aplied to the CCA wires of the bonding jumper is necessary when the cable is exposed to extremely severe working environments, such as places with humid warm conditions, saline fog or repeated intense heat.
  • the tin coating (43) allows keeping the wire resistivity constant over time, without any impedance and attenuation alteration. Moreover, being free of oxidation, tin guarantees the perfect weldability of the bonding jumper over time.
  • a wire (40) of the bonding jumper with 0.13mm total diameter in the cable (100) has the following structure:
  • the bonding jumper (4) is made of a mesh of twisted wires (40).
  • the wires are grouped in spindles of 5 wires each. A total of 16 spindles are used to make the mesh.
  • Each spindle is made of 5 wires with 0.13mm diameter (each wire).
  • the twist pitch of the spindles to make the mesh is 28mm.
  • the second shield (3) surrounds the dielectric material (2).
  • the second shield (3) is composed of a sheet of aluminum-based composite material with 0.05 mm thickness.
  • the second shield (3) comprises a multilayer sheet comprising a polyester film interposed between two aluminum layers.
  • the dielectric material (2) and the second shield (3) (if present) have a percentage of optical coverage higher than 90%.
  • the external sheath (5) is made of lead-free anti-migrating PVC.
  • the cable (100) of the invention has the following mechanical characteristics:
  • the cable (100) passes the following laboratory tests:
  • the coaxial cable (100) of the invention has the following advantages:
  • the cable (100) of the invention has the same electrical performance and the same corrosion resistance as a coaxial cable with core and bonding jumper made of pure copper and advantageously has a considerably lower total weight, as well as lower production costs.

Landscapes

  • Communication Cables (AREA)
  • Insulated Conductors (AREA)

Claims (10)

  1. Câble coaxial (100) comprenant:
    - un groupe conducteur central (1) destiné à transporter un signal,
    - un blindage (4) comprenant une pluralité de fils (40) disposés à maille, destiné à être branché à une masse pour blinder le groupe conducteur central,
    - un matériel diélectrique (2) disposé entre le groupe conducteur central (1) et le blindage (4) pour isoler le groupe conducteur central (1) du blindage (4), et
    - une gaine isolante (5) disposée autour du blindage (4),
    où ledit groupe conducteur central (1) et ledit blindage (4) comprennent une pluralité de fils (10, 40) réalisés avec un noyau en aluminium (11, 41) revêtu par un revêtement en cuivre (12, 42),
    caractérisé en ce que
    lesdits fils (40) du blindage (4) comprennent un revêtement externe en étain (43).
  2. Câble coaxial (100) selon la revendication 1, où l'épaisseur du dit revêtement externe en étain (43) varie du 0,5% au 2% du diamètre total du fil du blindage (4).
  3. Câble coaxial (100) selon la revendication 1 ou 2, où lesdits fils (10) du groupe conducteur central (1) comprennent un revêtement externe en étain (13).
  4. Câble coaxial (100) selon la revendication 3, où l'épaisseur du dit revêtement externe en étain (13) varie du 0,5% au 2% du diamètre total du fil du groupe conducteur central (1).
  5. Câble coaxial (100) selon l'une quelconque des revendications précédentes, où lesdits fils (10) du groupe conducteur central (1) comprennent un fil conducteur central (10a) droit et une pluralité de fils conducteurs périphériques (10b) qui s'enroulent autour du fil conducteur central (10a) en un faisceau à spirale.
  6. Câble coaxial (100) selon l'une quelconque des revendications précédentes, comprenant également un second blindage (3) interposé entre ledit matériel diélectrique (2) et ledit blindage (4) de branchement à la masse.
  7. Câble coaxial (100) selon la revendication 6, où ledit second blindage (3) comprend une feuille de matériel composite, à base d'aluminium.
  8. Câble coaxial (100) selon la revendication 7, où ledit second blindage (3) comprend une feuille multicouche comprenant un film de polyester interposé entre deux couches d'aluminium.
  9. Câble coaxial (100) selon l'une quelconque des revendications précédentes, où ledit revêtement en cuivre (12) varie du 7 au 10% du diamètre total du fil du groupe conducteur central (1).
  10. Câble coaxial (100) selon l'une quelconque des revendications précédentes, où ledit revêtement en cuivre (42) varie du 7 au 10% du diamètre total du fil du blindage (4).
EP14709899.0A 2013-03-06 2014-02-26 Câble coaxial Active EP2965327B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL14709899T PL2965327T3 (pl) 2013-03-06 2014-02-26 Kabel koncentryczny

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000048A ITAN20130048A1 (it) 2013-03-06 2013-03-06 Cavo coassiale.
PCT/EP2014/053757 WO2014135419A1 (fr) 2013-03-06 2014-02-26 Câble coaxial

Publications (2)

Publication Number Publication Date
EP2965327A1 EP2965327A1 (fr) 2016-01-13
EP2965327B1 true EP2965327B1 (fr) 2016-12-21

Family

ID=48184276

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14709899.0A Active EP2965327B1 (fr) 2013-03-06 2014-02-26 Câble coaxial

Country Status (9)

Country Link
EP (1) EP2965327B1 (fr)
CN (1) CN104981880B (fr)
BR (1) BR112015019562B1 (fr)
ES (1) ES2620382T3 (fr)
HU (1) HUE033706T2 (fr)
IT (1) ITAN20130048A1 (fr)
PL (1) PL2965327T3 (fr)
PT (1) PT2965327T (fr)
WO (1) WO2014135419A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106714443B (zh) * 2015-11-13 2024-02-06 建业科技电子（惠州）有限公司 高精度柔性电路板
CN107750067A (zh) * 2017-09-26 2018-03-02 河北悦昌电子科技有限公司 无辐射碳纤维电采暖线缆及取暖装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1469486A1 (fr) * 2003-04-17 2004-10-20 Copperweld Bimetallic Products Company Bandes d'aluminium revêtues de cuivre et procédé de fabrication de bandes d'aluminium revêtues de cuivre

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2275754Y (zh) * 1996-10-15 1998-03-04 萧山市奋达邮电器材厂 一种同轴电缆
US6265667B1 (en) * 1998-01-14 2001-07-24 Belden Wire & Cable Company Coaxial cable
KR100817982B1 (ko) * 2007-02-12 2008-03-31 엘에스전선 주식회사 가공 송전선 인장선용 고분자 복합 선재 및 그 제조방법
CN201518234U (zh) * 2009-10-29 2010-06-30 江苏华旺科技有限公司 一种镀锡铜包铝导体材料
CN101752034A (zh) * 2010-02-04 2010-06-23 华为技术有限公司 同轴电缆及多芯同轴电缆
CN201758034U (zh) * 2010-08-24 2011-03-09 常州市邮电通信光缆有限公司 铜漆包线
CN201845594U (zh) * 2010-11-10 2011-05-25 江苏赛特电气有限公司 地理勘探用高柔软耐老化特种电缆
CN202677901U (zh) * 2012-03-29 2013-01-16 赣州金信诺电缆技术有限公司 电源线

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1469486A1 (fr) * 2003-04-17 2004-10-20 Copperweld Bimetallic Products Company Bandes d'aluminium revêtues de cuivre et procédé de fabrication de bandes d'aluminium revêtues de cuivre

Also Published As

Publication number Publication date
EP2965327A1 (fr) 2016-01-13
HUE033706T2 (en) 2017-12-28
CN104981880B (zh) 2017-09-08
BR112015019562B1 (pt) 2021-02-02
PL2965327T3 (pl) 2017-06-30
PT2965327T (pt) 2017-03-29
WO2014135419A1 (fr) 2014-09-12
ES2620382T3 (es) 2017-06-28
ITAN20130048A1 (it) 2014-09-07
CN104981880A (zh) 2015-10-14

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