CN108376580A - A kind of low-loss high-speed cable and flat type cable - Google Patents

Abstract

The invention discloses a low-loss high-speed cable and a flat cable, wherein a low-loss high-speed cable includes a core group, a first shielding layer, a second shielding layer and an outer layer; the first shielding layer Covered outside the wire core group, the second shielding layer is covered outside the first shielding layer, and the outer coating layer is covered outside the second shielding layer; the wire core group includes two inner conductors , the two inner conductors are separately covered with a first perfluoroethylene propylene copolymer insulating layer, and the two first perfluoroethylene propylene copolymer insulating layers are covered with a second perfluoroethylene propylene copolymer extruded at the same time Insulation. The wire material of the invention is soft, has strong high temperature resistance, the shielding layer can realize full shielding, the consistency of the dielectric constant is relatively high, and the signal attenuation loss can be reduced.

Description

A low-loss high-speed cable and flat cable

technical field

The invention relates to the technical field of communication wires, in particular to a low-loss high-speed cable and a flat cable.

Background technique

At present, electronic signal interface lines such as SFP, QSFP, CXP, and SAS are gradually being applied in communication equipment. SFP (Small Form-factor Pluggables) can be simply understood as an upgraded version of GBIC; the SFP module (half the size of the GBIC module, can configure more than double the number of ports on the same panel; because the SFP module is functionally different from The GBIC is basically the same, therefore, it is also called miniaturized GBIC (Mini-GBIC) by some switch manufacturers; the SFP module compresses the size and power consumption by placing the CDR and electrical dispersion compensation outside the module; it is used for telecommunications and Optical communication applications in data communication; SFP connects network equipment such as switches, routers, etc. Born out of the demand for high-density, high-speed pluggable solutions; the transmission rate of this 4-channel pluggable interface has reached more than 40Gbps. The transmission rate of CXP optical modules is as high as 12×10Gbps, and supports hot swapping. CXP optical modules Mainly aimed at the high-speed computer market, it is a supplement for CFP optical modules in Ethernet data centers.

However, the current SFP, QSFP, CXP, SAS and other interface cables still have the following problems: first, the insulating material of the core group is usually PE, the wire is relatively hard, and the high temperature resistance is not good; second, the shielding layer is difficult to align the core The group conducts 360-degree signal shielding without dead ends. In the future high-frequency, high-power signal transmission process, the stability and effective transmission of the signal cannot be guaranteed; third, the core group is two core wires that are extruded separately Combination, the consistency of the core wires needs to be matched between the two core wires, the inconsistency of capacitance and impedance will lead to signal distortion, the consistency of the dielectric constant is relatively low, and the signal attenuation loss is large.

Contents of the invention

The technical problem to be solved by the present invention is to provide a low-loss cable with soft wire, strong high temperature resistance, full shielding of the shielding layer, high consistency of dielectric constant, and reduced signal attenuation loss based on the above-mentioned deficiencies in the prior art. High-speed cables and flat cables.

In order to solve the above-mentioned technical problems, the first technical solution of the present invention is: a low-loss high-speed cable, including a core group, a first shielding layer, a second shielding layer and an outer layer; the first shielding layer covers Outside the wire core group, the second shielding layer is covered outside the first shielding layer, and the outer coating layer is covered outside the second shielding layer; the wire core group includes two inner conductors, two The root inner conductor is separately covered with a first perfluoroethylene propylene copolymer insulating layer, and the two first perfluoroethylene propylene copolymer insulating layers are covered with a second perfluoroethylene propylene copolymer insulating layer extruded at the same time .

Preferably, the first shielding layer is a copper foil layer with a thickness of 6-25 μm; the second shielding layer is an aluminum foil layer with a thickness of 6-25 μm; the outer layer is a hot-melt PET tape layer, CPP tape Any one of layer, OPP tape layer, PVC tape layer, nylon tape layer, PE tape layer, TPU tape layer, the thickness is 6-25μm.

Preferably, the inner conductor is any one of silver-plated copper inner conductor, tin-plated copper inner conductor, bare copper inner conductor, silver-plated copper-clad steel inner conductor, silver-plated copper-clad aluminum inner conductor, with a diameter of 160- 511 μm; the inner core of the silver-plated copper inner conductor is a copper conductor, and the outer layer is a silver-plated layer, and the thickness of the silver-plated layer is 0.3-2.0 μm; the inner core of the tin-plated copper inner conductor is a copper conductor, and the outer layer is a silver-plated layer. The layer is a tin-plated layer, and the thickness of the tin-plated layer is 0.3-2.0 μm; the inner core of the silver-plated copper-clad steel inner conductor is a copper-clad steel conductor, and the outer layer is a silver-plated layer, and the thickness of the silver-plated layer is 0.3-2.0 μm; the inner core of the silver-plated copper-clad aluminum inner conductor is a copper-clad aluminum inner conductor, the outer layer is a silver-plated layer, and the thickness of the silver-plated layer is 0.3-2.0 μm.

Preferably, two ground wires are provided between the first shielding layer and the second shielding layer, and the two ground wires are respectively located on the left and right sides of the first shielding layer. Further, the ground wire is any one of silver-plated copper ground wire, tin-plated copper ground wire, bare copper ground wire, silver-plated copper-clad steel ground wire, and silver-plated copper-clad aluminum ground wire, with a diameter of 160-511 μm The inner core of the silver-plated copper ground wire is a copper conductor, and the outer layer is a silver-plated layer, and the thickness of the silver-plated layer is 0.3-2.0 μm; the inner core of the tin-plated copper ground wire is a copper conductor, and the outer layer It is a tin-plated layer, and the thickness of the tin-plated layer is 0.3-2.0 μm; the inner core of the silver-plated copper-clad steel ground wire is a copper-clad steel conductor, and the outer layer is a silver-plated layer, and the thickness of the silver-plated layer is 0.3 μm. -2.0 μm; the inner core of the silver-plated copper-clad aluminum ground wire is a copper-clad aluminum inner conductor, and the outer layer is a silver-plated layer, and the thickness of the silver-plated layer is 0.3-2.0 μm.

In order to solve the above technical problems, the second technical solution of the present invention is: a low-loss high-speed cable, including a core group, a shielding layer and an outer coating layer; the shielding layer is wrapped outside the core group, and the The outer coating layer is covered outside the shielding layer; the core group includes two inner conductors, and the two inner conductors are separately covered with a first perfluoroethylene propylene copolymer insulating layer, two first perfluoroethylene propylene The copolymer insulation layer is covered with a second perfluoroethylene propylene copolymer insulation layer extruded at the same time; two flat ground wires are sandwiched between the shielding layer and the outer layer, and the two flat ground wires are located at The upper and lower sides of the shield.

Preferably, the shielding layer is a copper foil layer with a thickness of 6-25 μm; the outer layer is a hot-melt PET tape layer, a CPP tape layer, an OPP tape layer, a PVC tape layer, a nylon tape layer, a PE tape layer, Any one of the TPU tape layers, with a thickness of 6-25 μm; the two flat ground wires are any one of silver-plated copper ground wires, silver-plated copper-clad steel ground wires, and silver-plated copper-clad aluminum ground wires.

In order to solve the above-mentioned technical problems, the third technical solution of the present invention is: a low-loss high-speed flat cable, which is composed of at least two groups of low-loss high-speed cables according to any one of claims 1-5 arranged horizontally , each low-loss high-speed cable is also covered with a second heat-fused PET tape layer.

In order to solve the above technical problems, the fourth technical solution of the present invention is: a low-loss high-speed flat cable, including at least two sets of wire core groups, and the outside of the at least two wire core groups is covered with direct-wrapped self-adhesive The copper foil layer has a thickness of 6-25 μm, and the direct-wrapped self-adhesive copper foil layer is covered with a straight-wrapped hot-melt PET tape layer with a thickness of 6-25 μm; the core group includes two inner conductors, two The root inner conductor is separately covered with a first perfluoroethylene propylene copolymer insulating layer, and the two first perfluoroethylene propylene copolymer insulating layers are covered with a second perfluoroethylene propylene copolymer insulating layer extruded at the same time ; On the left and right sides of the wire core group, there are also ground wires inside the direct-wrapped self-adhesive copper foil layer. The ground wires are silver-plated copper ground wires, silver-plated copper-clad steel ground wires, and silver-plated copper-clad aluminum ground wires. any of the.

The beneficial effects of the present invention are: firstly, the core groups of the first technical solution and the third technical solution of the present invention are covered with a first shielding layer, and the first shielding layer is covered with a second shielding layer, which can Carry out 360-degree full signal shielding without dead angle on the wire core group, which can ensure the stable and effective transmission of signals in the future high-frequency, high-power signal transmission process; the wires of the second technical solution and the fourth technical solution of the present invention The core group is coated with a copper foil layer, and the wire core group can also be fully shielded for signals; second, the two inner conductors of the wire core group of the present invention are separately covered with a first perfluoroethylene propylene copolymer insulating layer, The two first perfluoroethylene propylene copolymer insulating layers are covered with a second perfluoroethylene propylene copolymer insulating layer extruded at the same time. The wire is soft and the temperature resistance range can reach -40 ° C ~ 300 ° C, with good high temperature resistance ; Third, since the second perfluoroethylene propylene copolymer insulating layer is an insulating layer extruded at the same time, its dielectric constant consistency is relatively high, which can reduce signal attenuation loss by 30%.

Description of drawings

FIG. 1 is one of the cross-sectional schematic diagrams of the low-loss high-speed cable in the first embodiment.

Fig. 2 is the second schematic diagram of the cross-sectional structure of the low-loss high-speed cable in the first embodiment.

Fig. 3 is a schematic cross-sectional structure diagram of a low-loss high-speed cable in Embodiment 2.

Fig. 4 is a schematic cross-sectional structure diagram of a low-loss high-speed flat cable in Embodiment 3.

Fig. 5 is a schematic cross-sectional structure diagram of a low-loss high-speed flat cable in Embodiment 4.

In the figure: 1. Core group; 11. Inner conductor; 12. The first perfluoroethylene propylene copolymer insulating layer; 13. The second perfluoroethylene propylene copolymer insulating layer; 2. The first shielding layer; 3. The second 2. Shielding layer; 4. Outer layer; 5. Ground wire; 6. Shielding layer; 7. Flat ground wire; 8. Second hot-melt PET tape layer; 9. Straight-wrapped self-adhesive copper foil layer; 10. Straight-wrapped Hot-melt PET tape layer.

Detailed ways

The structural principle and working principle of the present invention will be further described in detail below in conjunction with the accompanying drawings.

As shown in FIGS. 1 to 5 , they are structural diagrams of low-loss high-speed cables and flat cables shown in Embodiments 1 and 4 of the present invention. The embodiments described by referring to the figures are exemplary and are intended to explain the present application and should not be construed as limiting the present application. In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "side", "left", "right" etc. is based on the orientation or positional relationship shown in the drawings , is only for the convenience of describing the present application and simplifying the description, but does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present application. The following are specific technical solutions of the present invention.

Embodiment one:

As shown in Figures 1 and 2, a low-loss high-speed cable includes a core group 1, a first shielding layer 2, a second shielding layer 3, and an outer layer 4; the first shielding layer 2 is coated on Outside the wire core group 1, the second shielding layer 3 is covered outside the first shielding layer 2, and the outer coating layer 4 is covered outside the second shielding layer 3; the wire core group 1 includes two One inner conductor 11, the two inner conductors 11 are separately covered with a first perfluoroethylene propylene copolymer insulating layer 12, and the outer parts of the two first perfluoroethylene propylene copolymer insulating layers 12 are covered with a simultaneously extruded first Two perfluoroethylene propylene copolymer insulating layers 13, the cross-sectional shape of the second perfluoroethylene propylene copolymer insulating layer 13 is like a racetrack.

As shown in Figures 1 and 2, the first shielding layer 2 is a copper foil layer with a thickness of 6-25 μm; the second shielding layer 3 is an aluminum foil layer with a thickness of 6-25 μm; the outer covering layer 4 It is any one of hot-melt PET tape, CPP tape, OPP tape, PVC tape, nylon tape, PE tape, and TPU tape, with a thickness of 6-25 μm, preferably a hot-melt PET tape.

As shown in Figures 1 and 2, the inner conductor 11 is any one of silver-plated copper inner conductor, tin-plated copper inner conductor, bare copper inner conductor, silver-plated copper-clad steel inner conductor, silver-plated copper-clad aluminum inner conductor One, with a diameter of 160-511 μm; the inner core of the silver-plated copper inner conductor is a copper conductor, and the outer layer is a silver-plated layer, and the thickness of the silver-plated layer is 0.3-2.0 μm; the tin-plated copper inner conductor The inner core is a copper conductor, the outer layer is a tin-plated layer, and the thickness of the tin-plated layer is 0.3-2.0 μm; the inner core of the silver-plated copper-clad steel inner conductor is a copper-clad steel conductor, and the outer layer is a silver-plated layer, The thickness of the silver-plated layer is 0.3-2.0 μm; the inner core of the silver-plated copper-clad aluminum inner conductor is a copper-clad aluminum inner conductor, and the outer layer is a silver-plated layer, and the thickness of the silver-plated layer is 0.3-2.0 μm.

As shown in FIG. 2 , two ground wires 5 are arranged between the first shielding layer 2 and the second shielding layer 3 , and the two ground wires 5 are respectively located on the left and right sides of the first shielding layer 2 . The ground wire 5 is any one of silver-plated copper ground wire, tin-plated copper ground wire, bare copper ground wire, silver-plated copper-clad steel ground wire, and silver-plated copper-clad aluminum ground wire, with a diameter of 160-511 μm; The inner core of the silver-plated copper ground wire is a copper conductor, and the outer layer is a silver-plated layer, and the thickness of the silver-plated layer is 0.3-2.0 μm; the inner core of the tin-plated copper ground wire is a copper conductor, and the outer layer is a Tin-plated layer, the thickness of the tin-plated layer is 0.3-2.0 μm; the inner core of the silver-plated copper-clad steel ground wire is a copper-clad steel conductor, and the outer layer is a silver-plated layer, and the thickness of the silver-plated layer is 0.3-2.0 μm. 2.0 μm; the inner core of the silver-plated copper-clad aluminum ground wire is a copper-clad aluminum inner conductor, and the outer layer is a silver-plated layer, and the thickness of the silver-plated layer is 0.3-2.0 μm.

Embodiment two:

As shown in Figure 3, a low-loss high-speed cable includes a core group 1, a shielding layer 6 and an outer coating layer 4; the shielding layer 6 is wrapped outside the core group 1, and the outer coating layer 4 Coated outside the shielding layer 6; the core group 1 includes two inner conductors 11, and the two inner conductors 11 are separately covered with a first perfluorinated ethylene propylene copolymer insulating layer 12, two first perfluorinated The ethylene propylene copolymer insulating layer 12 is covered with a second perfluoroethylene propylene copolymer insulating layer 13 extruded simultaneously, and the cross-sectional shape of the second perfluoroethylene propylene copolymer insulating layer 13 is racetrack-shaped; the shielding layer Two flat ground wires 7 are sandwiched between 6 and the outer covering layer 4 , and the two flat ground wires 7 are located on the upper and lower sides of the shielding layer 6 .

As shown in Figure 3, the shielding layer 6 is a copper foil layer with a thickness of 6-25 μm; the outer layer 4 is a hot-melt PET tape layer, a CPP tape layer, an OPP tape layer, a PVC tape layer, and a nylon tape layer , PE tape layer, any one of TPU tape layer, the thickness is 6-25 μ m, preferably a hot-melt PET tape layer; the two flat ground wires 7 are silver-plated copper ground wires, silver-plated copper-clad steel ground wires , any one of the silver-plated copper-clad aluminum ground wires.

Embodiment three:

As shown in Figure 4, a low-loss high-speed flat cable is composed of at least two groups of low-loss high-speed cables described in the above-mentioned first technical solution arranged horizontally, and each low-loss high-speed cable is also covered with The second hot-melt PET tape layer 8 . The low-loss high-speed cables are horizontally connected in a row through the second hot-melt PET tape layer 8 .

Embodiment four:

As shown in Figure 5, a low-loss high-speed flat cable includes at least two sets of core groups 1, and the at least two sets of core sets 1 are covered with a direct-wrapped self-adhesive copper foil layer 9, with a thickness of 6-25 μm, the direct-wrapped self-adhesive copper foil layer 9 is covered with a straight-wrapped hot-melt PET tape layer 10, with a thickness of 6-25 μm; the core set 1 includes two inner conductors 11, two inner conductors The conductors 11 are separately covered with a first perfluoroethylene propylene copolymer insulating layer 12, and the two first perfluoroethylene propylene copolymer insulating layers 12 are covered with a second perfluoroethylene propylene copolymer insulating layer extruded simultaneously. Layer 13, the second perfluoroethylene propylene copolymer insulation layer 13 has a racetrack-like cross-sectional shape; on the left and right sides of the core group 1, a ground wire 5 is also arranged inside the self-adhesive copper foil layer 9 directly wrapped. Line 5 is any one of silver-plated copper ground wire, silver-plated copper-clad steel ground wire, and silver-plated copper-clad aluminum ground wire.

The above is only a preferred embodiment of the present invention, and any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical solution of the present invention fall within the scope of the technical solution of the present invention.

Claims (9)

1. a kind of low-loss high-speed cable, it is characterised in that：Including core group, first screen layer, secondary shielding layer and serving； The first screen layer is coated on except core group, and the secondary shielding layer is coated on except first screen layer, the serving It is coated on except secondary shielding layer；The core group includes two inner wires, and the is individually covered with except two inner wires One fluorinated ethylene propylene copolymer insulating layer is covered with while being extruded into except two first fluorinated ethylene propylene copolymer insulating layers Second fluorinated ethylene propylene copolymer insulating layer of type.

2. low-loss high-speed cable according to claim 1, it is characterised in that：The first screen layer is copper foil layer, thick Degree is 6-25 μm；The secondary shielding layer is aluminium foil layer, and thickness is 6-25 μm；The serving is that heat melts PET strip layer, CPP bands Any one in layer, OPP belts, PVC belts, nylon belt, PE belts, TPU belts, thickness are 6-25 μm.

3. low-loss high-speed cable according to claim 1, it is characterised in that：The inner wire be silver-plated copper inner wire, Any one in tin-coated copper inner wire, naked copper inner wire, silver-copper plated steel clad inner wire, silver-plated copper coating aluminum inner wire, it is a diameter of 160-511μm；The inner core of the silver-plated copper inner wire is copper conductor, and outer layer is silver coating, and the thickness of the silver coating is 0.3-2.0 μm；The inner core of the tin-coated copper inner wire is copper conductor, and outer layer is tin coating, and the thickness of the tin coating is 0.3-2.0 μm；It is described The inner core of silver-copper plated steel clad inner wire is copper covered steel conductor, and outer layer is silver coating, and the thickness of the silver coating is 0.3-2.0 μm；Institute The inner core for stating silver-plated copper coating aluminum inner wire is copper clad aluminum inner wire, and outer layer is silver coating, and the thickness of the silver coating is 0.3-2.0 μ m。

4. low-loss high-speed cable according to claim 1, it is characterised in that：The first screen layer and secondary shielding layer Between be additionally provided with two ground wires, two ground wires are located at the left and right sides of the first screen layer.

5. low-loss high-speed cable according to claim 4, it is characterised in that：The ground wire is silver-plated copper ground wire, tin plating Any one in copper ground wire, naked copper ground wire, silver-copper plated steel clad ground wire, silver-plated copper coating aluminum ground wire, a diameter of 160-511 μm；Institute The inner core for stating silver-plated copper ground wire is copper conductor, and outer layer is silver coating, and the thickness of the silver coating is 0.3-2.0 μm；The tin-coated copper The inner core of ground wire is copper conductor, and outer layer is tin coating, and the thickness of the tin coating is 0.3-2.0 μm；The silver-copper plated steel clad ground wire Inner core be copper covered steel conductor, outer layer is silver coating, and the thickness of the silver coating is 0.3-2.0 μm；The silver-plated copper coating aluminum ground wire Inner core be copper clad aluminum inner wire, outer layer is silver coating, and the thickness of the silver coating is 0.3-2.0 μm.

6. a kind of low-loss high-speed cable, it is characterised in that：Including core group, shielded layer and serving；The shielded layer cladding Except core group, the serving is coated on except shielded layer；The core group includes two inner wires, two inner wires it It is outer to be individually covered with the first fluorinated ethylene propylene copolymer insulating layer, two first fluorinated ethylene propylene copolymer insulating layers it It is outer to be covered with while the second fluorinated ethylene propylene copolymer insulating layer of extrusion molding；It is also pressed from both sides between the shielded layer and serving Equipped with two flat ground wires, two flat ground wires are located at the both sides up and down of shielded layer.

7. low-loss high-speed cable according to claim 6, it is characterised in that：The shielded layer is copper foil layer, and thickness is 6-25μm；The serving is that heat melts PET strip layer, CPP belts, OPP belts, PVC belts, nylon belt, PE belts, TPU bands Layer in any one, thickness be 6-25 μm；Two flat ground wires are silver-plated copper ground wire, silver-copper plated steel clad ground wire, silver-plated Any one in copper clad aluminum ground wire.

8. a kind of low-loss high speed flat type cable, it is characterised in that：Described in any one of at least two groups claim 1-5 Low-loss high-speed cable is transversely arranged to be formed, and being also covered with the second heat except each low-loss high-speed cable melts PET strip layer.

9. a kind of low-loss high speed flat type cable, it is characterised in that：Including at least two groups core group, at least two groups core group Be coated with straight packet self-adhesion copper foil layer, thickness is 6-25 μm, and the straight packet heat that is coated with of the straight packet self-adhesion copper foil layer melts PET Belt, thickness are 6-25 μm；The core group includes two inner wires, and it is complete that first is individually covered with except two inner wires Fluoroethylene-propylene copolymer insulating layer, is covered with except two first fluorinated ethylene propylene copolymer insulating layers while extrusion molding Second fluorinated ethylene propylene copolymer insulating layer；It is additionally provided with ground within the left and right sides of core group, straight packet self-adhesion copper foil layer Line, the ground wire are any one in silver-plated copper ground wire, silver-copper plated steel clad ground wire, silver-plated copper coating aluminum ground wire.