WO2008074179A1 - Câble coaxial et son approche de fabrication - Google Patents

Câble coaxial et son approche de fabrication Download PDF

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Publication number
WO2008074179A1
WO2008074179A1 PCT/CN2006/003259 CN2006003259W WO2008074179A1 WO 2008074179 A1 WO2008074179 A1 WO 2008074179A1 CN 2006003259 W CN2006003259 W CN 2006003259W WO 2008074179 A1 WO2008074179 A1 WO 2008074179A1
Authority
WO
WIPO (PCT)
Prior art keywords
insulating layer
coaxial cable
foamed
solid
cable according
Prior art date
Application number
PCT/CN2006/003259
Other languages
English (en)
Chinese (zh)
Inventor
Zijü REN
Baijiang Song
Original Assignee
Zte Corporation
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
Application filed by Zte Corporation filed Critical Zte Corporation
Priority to PCT/CN2006/003259 priority Critical patent/WO2008074179A1/fr
Publication of WO2008074179A1 publication Critical patent/WO2008074179A1/fr

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Classifications

    • 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
    • H01B11/1834—Construction of the insulation between the conductors
    • H01B11/1839—Construction of the insulation between the conductors of cellular structure
    • 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
    • H01B7/02—Disposition of insulation
    • H01B7/0208—Cables with several layers of insulating material
    • H01B7/0216—Two layers

Definitions

  • the present invention relates to a coaxial cable, such as a 75 ohm coaxial cable for a 2M interface in the field of communication.
  • the invention also relates to a method of manufacturing such a coaxial cable.
  • coaxial cables are often used to carry electrical signals, such as 2M interfaces for transmission equipment and switching equipment.
  • One: a 75 ohm coaxial cable is used to transmit 2 Mbps signals, and CDMA and WCDMA equipment are used for RF signals. It is also transmitted by coaxial cable.
  • Common coaxial cables have characteristic impedances of 50 ohms and 75 ohms.
  • the characteristic impedance of the local coaxial cable for communication is 75 ohms, and cables of different wire diameters can be used depending on the transmission distance of the signal and the requirements for attenuation.
  • each device manufacturer selects coaxial cables of different wire diameters according to the requirements of the wiring density of the device.
  • equipment manufacturers generally chose a coaxial cable with a cable outer diameter of 3.2 mm ⁇ 5.0 mm.
  • the structure of this cable is shown in Figure 1.
  • the cable 1 includes: an inner conductor 11, an insulating layer 12, a screen layer 13, and a sheath 14.
  • the cable 1 is characterized in that: the insulating layer 12 is a solid polyolefin material, and the outer diameter of the cable 1 is relatively large, and the attenuation is small, and it is required to occupy more wiring space in the device, so that the outlet density of the device is not high.
  • equipment manufacturers mostly use coaxial cable 2 with a wire diameter of 1.6 mm to 3.0 mm.
  • the structure of the cable 2 is as shown in Fig.
  • the thickness of the solid bonding layer 22 of the polyethylene material is 0.05 ⁇ 0.01 mm
  • the thickness of the insulating layer 23 of the foamed structure of the polyethylene material is 1.2 ⁇ 0.05 mm
  • the outer diameter of the outer conductor shielding layer is 1.8.
  • the outer diameter of the mm, and the low-smoke, halogen-free sheath 25 is 2.2 ⁇ 0.1 mm.
  • the insulating layer of the cable 2 is made of a physically foamed polyolefin material, and in order to ensure the adhesion between the inner conductor and the insulating layer of the cable 2, the inner conductor A bonding layer of polyolefin is disposed between the 21 and the insulating layer 23, but the cable 2 is easily wetted by water due to its foamed structure, resulting in a corresponding change in distributed capacitance and inductance, forming its characteristic resistance, resulting in relatively large attenuation.
  • the present invention provides a coaxial cable comprising, in order from the inside to the outside, an inner conductor, an insulating layer, a shielding layer, and a sheath, wherein the insulating layer includes a foamed insulating layer on the inner side. And a solid insulation layer on the outside.
  • the inner conductor is made of tinned copper wire.
  • the foamed insulating layer, the solid insulating layer and/or the sheath are made of a polyolefin material.
  • the shielding layer is made of woven copper wire of ⁇ 0.08 mm.
  • the sheath is made of a low-smoke, halogen-free material.
  • the foamed insulating layer has a thickness of from 0.35 to 0.55 mm, preferably 0.45 mm.
  • the solid insulating layer has a thickness of 0.04 to 0.06 mm, preferably 0.05 mm.
  • the jacket has a diameter of 2.0 ⁇ 0.1 mm.
  • the inner conductor has a diameter of 0.247 ⁇ 0.257 mm
  • the foamed insulating layer has a thickness of 0.45 mm
  • the solid insulating layer has a thickness of 0.04-0.06 mm
  • the solid insulating layer has an outer diameter of 1.26 ⁇ 0.05 mm
  • the outer conductor shield layer The diameter of the sheath is 1.8 mm and the outer diameter of the sheath is 2.0 ⁇ 0.1 mm.
  • a method for manufacturing a coaxial cable comprising: step one, providing an inner conductor; step two, extruding a foamed insulating layer forming a foamed structure; , extruding a solid insulating layer forming a solid skin structure; step four, weaving the shielding layer; and step five, extruding to form a sheath.
  • the inner conductor is further preheated.
  • the bridge pressure can be appropriately increased.
  • the foamed insulating layer is made of a foamed polyethylene material, and the extruded thickness is 0.35-0.55 mm, preferably 0,45 mm.
  • the solid insulating layer (33) is made of a polyethylene cerium material having an extruded thickness of 0.04 to 0.06 mm, preferably 0.05 mm.
  • step 3 is performed while performing step two, and a solid insulating layer (32) forming a solid sheath structure is directly extruded on the foamed insulating layer (32) of the foamed structure formed by extrusion.
  • the invention has the following advantages: Since the insulating layer comprises a foamed insulating layer on the inner side and a solid insulating layer on the outer side, the surface of the insulating layer is smooth and flat, and the hooking property is good compared with the prior art.
  • the outer solid insulating layer can prevent moisture from penetrating into the foamed insulating layer, it can function as a moisture barrier and thus reduce the attenuation of the cable. And since the attenuation of the cable can be reduced, the diameter of the cable can be further reduced if the attenuation allows. Since the bonding layer previously disposed between the inner conductor and the insulating layer is eliminated, it is possible to avoid damage to the inner conductor when the cable assembly is subjected to stripping, thereby reducing the reject rate and improving the quality of the cable assembly. Correspondingly, the process of previously forming an adhesive layer on the inner conductor is eliminated, which simplifies the processing and reduces the cost.
  • the inner conductor and the inner conductor can be increased although the bonding layer previously provided between the inner conductor and the insulating layer is eliminated.
  • the adhesion of the foamed insulating layer and the adhesion of the foamed insulating layer to the inner conductor since the foamed insulating layer in direct contact with the inner conductor has a large thickness with respect to the original bonding layer, the adhesion and adhesion between the inner insulating conductor and the inner conductor does not affect the peelability, that is, the cable assembly
  • the insulating layer of the present invention facilitates stripping during processing.
  • FIG. 1 is a transverse cross-sectional view showing a coaxial cable of a larger wire diameter commonly used by existing communication device manufacturers
  • FIG. 2 is a view showing a commonly used communication device manufacturer in recent years.
  • Fig. 3 is a transverse cross-sectional view showing a coaxial cable having a foamed insulating layer in an exemplary embodiment of the present invention.
  • a coaxial cable 3 having a foamed insulating layer 32 of an exemplary embodiment of the present invention includes, in order from the inside to the outside, an inner conductor 31, insulating layers 32 and 33, an outer conductor shield layer 34, and a sheath 35.
  • the insulating layers 32 and 33 are composed of a foamed insulating layer 32 and a solid insulating layer 33.
  • the inner conductor 31 of the coaxial cable 3 having the foamed insulating layer 32 is made of a ⁇ 0.26 mm high quality tinned copper wire produced by Shanghai Zhenxiong Copper Co., Ltd.
  • the outer conductor shielding layer 34 is made of a tinned copper wire of ⁇ 0.08 mm, and the foamed insulating layer 32, the solid insulating layer 33 and the sheath 35 can be made of a polyolefin material.
  • the material of the foamed insulating layer 32 of the foamed structure may be DGDA3485 foamed polyethylene of Dow Company of the United States, and the solid insulating layer 33 of the solid skin structure may be made of solid polyethylene of HDPE5305E of Mitsui, Japan.
  • the material used for the sheath 35 is a low-smoke halogen-free material.
  • the AFR/15 sheath material of the Italian Pandner Company can be used, which meets the ROHS environmental protection requirements.
  • the inner conductor 31 of the coaxial cable 3 having the foamed insulating layer 32 according to the exemplary embodiment of the present invention has a diameter of 0.247 to 0.257 mm, and foam insulation of the polyethylene material.
  • the thickness of layer 32 is 0.35-0.55 mm, preferably 0.45 mm
  • the thickness of solid insulating layer 33 of polyethylene material is 0.04-0.06 mm, preferably 0.05 mm
  • the outer diameter of solid insulating layer 33 is 1.26 ⁇ 0.05 mm
  • shielding of outer conductor The outer diameter of the layer 34 is 1.8 mm
  • the outer diameter of the jacket 35 of the 4-inch smoke-free material is 2.0 ⁇ 0.1 mm.
  • the insulation is a foamed structure formed of a foamed polyethylene material, and extruded on the outer layer to form a 0.05 mm polyethylene solid skin layer. This insulating structure can be called Insulate PE foam.
  • the manufacturing method includes preheating and extruding the tinned inner conductor 31 having a diameter of 0.247 to 0.257 mm to form insulating layers 32 and 33, a braided outer conductor shield layer 34, and extruding to form a sheath 35.
  • the tin-plated inner conductor 31 having a diameter of 0.247 to 0.257 mm is first preheated, which can be increased.
  • the adhesion of the conductor 1 and the foamed insulating layer 32 improves the adhesion of the inner conductor 31 and the foamed insulating layer 32.
  • the polyethylene material is extruded to form a foamed insulating layer 32.
  • the foamed insulating layer 32 is made of expanded polyethylene.
  • the extrusion pressure is appropriately increased in accordance with the structural parameters and the process parameters, etc., to further secure the inner conductor after the elimination of the bonding layer 22 between the inner conductor 31 and the foamed insulating layer 32 in the prior art.
  • the adhesion between 31 and the foamed insulating layer 32 is not lowered.
  • solid polyethylene was extruded outside the foamed insulating layer 32 to form a 0.05 mm solid insulating layer 33.
  • the surface of the insulating layer is smooth and uniform, and at the same time, it has a moisture-proof effect.
  • the outer conductor shield layer 34 is woven.
  • a polyethylene material is extruded over the shield layer 34 to form a jacket 35.
  • the solid insulating layer 32 of the solid skin structure is directly extruded on the foamed insulating layer 32 while extruding the foamed insulating layer 32 of the foamed structure.
  • the cable 2 (SFYE-75-2-1 ⁇ 8 ) shown in Fig.
  • the coaxial with the foamed insulating layer 32 according to an exemplary embodiment of the present invention
  • the attenuation of cable 3 (SYFE-75-2-1 x 8 ) is relatively low.
  • the material used for the bonding layer 22 of the cable 2 shown in Fig. 2 is different from the material used for the solid insulating layer 33 of the cable 3 shown in Fig. 3. If the two materials are the same, the difference in attenuation will be larger. .
  • the attenuation result is a test according to GB/17737.1-2000.
  • the material used for the foamed insulating layer 32 has a large number of via holes therein, which are channels through which water permeates in the foamed insulating layer 32.
  • the present invention passes through the outside of the foamed insulating layer 32.
  • the layer is a solid insulating layer 33 formed of a solid polyolefin which is capable of preventing moisture from penetrating into the foamed insulating layer 32, thereby reducing the attenuation of the cable.
  • the diameter of the cable can be further reduced with the aid of the attenuation.
  • the bonding layer 22 previously disposed between the inner conductor 31 and the insulating layer 32 is eliminated, thereby avoiding damage to the inner conductor 31 during the processing of the cable assembly, which reduces the reject rate and improves the cable assembly.

Landscapes

  • Communication Cables (AREA)

Abstract

Le câble coaxial selon l'invention est constitué, en allant de l'intérieur vers l'extérieur, d'un conducteur intérieur (31), d'un isolant (32, 33), d'un blindage (34) et d'une gaine (35), lequel isolant (32, 33) contient un isolant de moussage (32) à l'intérieur et un isolant solide (33) à l'extérieur. Une approche de fabrication d'un câble coaxial est constituée d'une première étape consistant à fournir un conducteur intérieur (31), d'une deuxième étape consistant à extruder un isolant de moussage (32), d'une troisième étape consistant à extruder un isolant solide (33), d'une quatrième étape consistant à tresser un blindage (34) et d'une dernière étape consistant à extruder une gaine (35). L'invention a résolu les défauts du câble de l'art antérieur, tels que le large diamètre de câble, l'important affaiblissement, la difficulté à usiner le sous-ensemble du câble et à peler la tête, et le coût élevé.
PCT/CN2006/003259 2006-12-04 2006-12-04 Câble coaxial et son approche de fabrication WO2008074179A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2006/003259 WO2008074179A1 (fr) 2006-12-04 2006-12-04 Câble coaxial et son approche de fabrication

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2006/003259 WO2008074179A1 (fr) 2006-12-04 2006-12-04 Câble coaxial et son approche de fabrication

Publications (1)

Publication Number Publication Date
WO2008074179A1 true WO2008074179A1 (fr) 2008-06-26

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ID=39535959

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2006/003259 WO2008074179A1 (fr) 2006-12-04 2006-12-04 Câble coaxial et son approche de fabrication

Country Status (1)

Country Link
WO (1) WO2008074179A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104217813A (zh) * 2013-06-04 2014-12-17 住友电气工业株式会社 同轴电线及其制造方法
CN106229060A (zh) * 2016-08-22 2016-12-14 山东泰开电缆有限公司 基于共挤层的复合屏蔽绝缘管型母线及制备方法
CN108808194A (zh) * 2018-05-28 2018-11-13 浙江万马天屹通信线缆有限公司 6GHz超高频带记忆性抗侧压同轴电缆及绝缘料配方
CN110459350A (zh) * 2019-08-02 2019-11-15 上海福尔欣线缆有限公司 一种车辆智能驾驶系统用的同轴数据缆及制造方法

Citations (9)

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Publication number Priority date Publication date Assignee Title
CN1146607A (zh) * 1995-06-07 1997-04-02 三菱电线工业株式会社 用于同轴电缆的绝缘材料、同轴电缆和制造同轴电缆的方法
CN2275754Y (zh) * 1996-10-15 1998-03-04 萧山市奋达邮电器材厂 一种同轴电缆
JP2000048653A (ja) * 1998-07-31 2000-02-18 Hitachi Cable Ltd 高速伝送用同軸ケーブル及びその製造方法
CN2559080Y (zh) * 2002-04-22 2003-07-02 华为技术有限公司 一种同轴电缆
CN1545102A (zh) * 2003-11-24 2004-11-10 珠海宇讯同轴电缆有限公司 同轴电缆
CN1630916A (zh) * 2002-02-08 2005-06-22 平河福泰克株式会社 高精度发泡同轴电缆及其制造方法
JP2005343916A (ja) * 2004-05-31 2005-12-15 Fujikura Ltd 発泡核剤およびそれを使用した高周波同軸ケーブル
CN2765295Y (zh) * 2004-12-12 2006-03-15 华为技术有限公司 一种同轴电缆
CN1795517A (zh) * 2003-05-22 2006-06-28 平河福泰克株式会社 发泡同轴线缆及其制造方法

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1146607A (zh) * 1995-06-07 1997-04-02 三菱电线工业株式会社 用于同轴电缆的绝缘材料、同轴电缆和制造同轴电缆的方法
CN2275754Y (zh) * 1996-10-15 1998-03-04 萧山市奋达邮电器材厂 一种同轴电缆
JP2000048653A (ja) * 1998-07-31 2000-02-18 Hitachi Cable Ltd 高速伝送用同軸ケーブル及びその製造方法
CN1630916A (zh) * 2002-02-08 2005-06-22 平河福泰克株式会社 高精度发泡同轴电缆及其制造方法
CN2559080Y (zh) * 2002-04-22 2003-07-02 华为技术有限公司 一种同轴电缆
CN1795517A (zh) * 2003-05-22 2006-06-28 平河福泰克株式会社 发泡同轴线缆及其制造方法
CN1545102A (zh) * 2003-11-24 2004-11-10 珠海宇讯同轴电缆有限公司 同轴电缆
JP2005343916A (ja) * 2004-05-31 2005-12-15 Fujikura Ltd 発泡核剤およびそれを使用した高周波同軸ケーブル
CN2765295Y (zh) * 2004-12-12 2006-03-15 华为技术有限公司 一种同轴电缆

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104217813A (zh) * 2013-06-04 2014-12-17 住友电气工业株式会社 同轴电线及其制造方法
CN106229060A (zh) * 2016-08-22 2016-12-14 山东泰开电缆有限公司 基于共挤层的复合屏蔽绝缘管型母线及制备方法
CN108808194A (zh) * 2018-05-28 2018-11-13 浙江万马天屹通信线缆有限公司 6GHz超高频带记忆性抗侧压同轴电缆及绝缘料配方
CN110459350A (zh) * 2019-08-02 2019-11-15 上海福尔欣线缆有限公司 一种车辆智能驾驶系统用的同轴数据缆及制造方法

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