CN209980813U

CN209980813U - Novel shielded low-loss high-speed transmission cable

Info

Publication number: CN209980813U
Application number: CN201920721901.8U
Authority: CN
Inventors: 王德全; 倪冬华; 周端希; 耿有帅; 冯森辉
Original assignee: Zhejiang Megabon Interconnect Polytron Technologies Inc
Current assignee: Zhejiang Megabon Interconnect Polytron Technologies Inc
Priority date: 2019-05-20
Filing date: 2019-05-20
Publication date: 2020-01-21
Anticipated expiration: 2029-05-20

Abstract

The utility model relates to a novel shielded low-loss high-speed transmission cable, including two parallel arrangement, the diameter is at 0.16-0.51 mm's conductor, its characterized in that, one deck insulating wrapping layer is extruded respectively to two conductor outsides, and two insulating wrapping layer outsides are closely wrapped up one deck copper aluminium PET combined material band, and copper aluminium PET combined material band is wrapped one deck or two layers of hot melt PET area or are extruded one deck plastics sheath again. The utility model aims at the defects of the prior symmetrical parallel double-shaft cable product, the thickness of a metal shielding layer is slightly increased under the condition of meeting the requirements of wire external diameter and impedance by using a layer of copper-aluminum PET composite material wrapping belt or using a mode of an inner layer copper foil PET composite belt and an outer layer aluminum foil PET composite belt, and the material of the shielding layer is changed, so that the capacitance of a single-pair high-speed transmission cable is low, and the attenuation performance of the cable is better; meanwhile, the single-pair outer diameter of the high-speed transmission cable is not influenced, the hardness is not increased, and the bending condition of the wire rod is not influenced.

Description

Novel shielded low-loss high-speed transmission cable

Technical Field

The utility model relates to a transmission cable technical field especially relates to a novel shielded low-loss high-speed transmission cable.

Background

The conventional symmetrical parallel double-shaft cable structure is characterized in that two parallel single wires are directly wrapped by metal shielding wrapping bands such as an aluminum foil and the like, the outer surface is fixed by a non-metal wrapping band such as a hot-melt PET and the like, a signal transmission pair high-speed cable is formed, the signal transmission efficiency of the high-speed transmission cable is improved, the attenuation size of the cable is a main influence factor, the cable is based on an attenuation transmission formula, the attenuation size is related to the dielectric constant of a wire pair insulating material, the diameter of a conductor and the capacitance, under the condition that the diameter of the same conductor wire and the insulating material are unchanged, the attenuation is related to the capacitance, the: because the single-layer metal shielding wrapping tape is used for wrapping, the metal base layer is very thin, the thickness is generally less than 0.01mm, and the total composite thickness is between 0.025 mm and 0.03mm, so that the internal capacitance of the line pair is large, and the attenuation is correspondingly poor. If the thickness of the metal shielding layer is increased only one by one, so that the capacitance is small, the attenuation is good, the two parallel single lines are not tightly coated due to too thick wrapping tape, the S parameter has a peak value, the attenuation out occurs at a low frequency, the transmission frequency of the cable is reduced, the speed is reduced, and the requirements cannot be met. The single pair of cables also has large and hard outer diameters due to the thick wrapping tape, and the performance of the wires is poor under normal bending conditions.

SUMMERY OF THE UTILITY MODEL

In order to solve the above technical problem, the present invention provides a novel shielded low-loss high-speed transmission cable with good attenuation performance and without affecting the bending condition of the wire.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a novel shielded low-loss high-speed transmission cable comprises two conductors which are arranged in parallel and have the diameter of 0.16-0.51mm, and is characterized in that an insulating wrapping layer is extruded outside the two conductors respectively, a copper-aluminum PET composite material wrapping belt is tightly wrapped outside the two insulating wrapping layers, and a layer or two layers of hot-melt PET belts are wrapped outside the copper-aluminum PET composite material wrapping belt or a plastic sheath is extruded outside the copper-aluminum PET composite material wrapping belt.

A novel shielded low-loss high-speed transmission cable comprises two conductors which are arranged in parallel and have the diameter of 0.16-0.51mm, and is characterized in that an insulating wrapping layer is extruded outside each of the two conductors, a copper foil PET composite belt is tightly wrapped outside each of the two insulating wrapping layers, an aluminum foil PET composite belt is wrapped outside each of the copper foil PET composite belts, and one or two layers of hot-melt PET belts are wrapped outside each of the aluminum foil PET composite belts or a plastic sheath is extruded outside each of the aluminum foil PET composite belts.

Preferably, the hot-melt PET belts are two layers, and the wrapping directions of the two layers of hot-melt PET belts are opposite.

Preferably, a ground wire is arranged between the two insulation wrapping layers.

Preferably, the conductor is one of bare copper, alloy copper, coated copper and coated alloy copper, and the insulating wrapping layer is made of polyolefin material or fluoroplastic.

The utility model aims at the defects of the prior symmetrical parallel double-shaft cable product, the thickness of a metal shielding layer is slightly increased under the condition of meeting the requirements of wire external diameter and impedance by using a layer of copper-aluminum PET composite material wrapping belt or using a mode of an inner layer copper foil PET composite belt and an outer layer aluminum foil PET composite belt, and the material of the shielding layer is changed, so that the capacitance of a single-pair high-speed transmission cable is low, and the attenuation performance of the cable is better; meanwhile, the single-pair outer diameter of the high-speed transmission cable is not influenced, the hardness is not increased, and the bending condition of the wire rod is not influenced.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention;

fig. 2 is a schematic structural diagram of embodiment 2 of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

Example 1

The novel shielded low-loss high-speed transmission cable shown in figure 1 comprises two conductors 6 which are arranged in parallel and have the diameter of 0.16-0.51mm, and is characterized in that one insulating wrapping layer 4 is extruded outside each of the two conductors 6, a ground wire 3 is further arranged between the two insulating wrapping layers 4, one copper-aluminum PET composite wrapping layer 7 is tightly wrapped outside each of the two insulating wrapping layers 4, and one or two layers of hot-melt PET belts 1 are wrapped outside the copper-aluminum PET composite wrapping layer 7 or one layer of plastic sheath is extruded outside each of the copper-aluminum PET composite wrapping layers 7.

The hot-melt PET belt is two-layer, and the wrapping directions of the two layers of hot-melt PET belts are opposite. The conductor is one of bare copper, alloy copper, plating copper and plating alloy copper, and the insulating wrapping layer 4 is made of polyolefin material or fluoroplastic.

One layer of one-way coated hot-melt PET or two layers of SZ-direction coated hot-melt PET and other wrapping belts are carried out outside the copper-aluminum PET composite wrapping belt 7 to form a single pair of parallel cables so as to ensure the tightness and the smoothness of the formed parallel high-speed transmission lines to the structure.

An SFP 2830 AWG single-pair transmission cable is formed by using a 0.29mm silver-plated copper conductor, extruding a layer of FEP fluoroplastic outside the conductor through FEP extrusion equipment, longitudinally wrapping a layer of copper-aluminum PET composite tape outside two fluoroplastic insulated single wires and a 0.254mm tin-plated copper ground wire in parallel, wrapping a layer of hot-melt PET wrapping tape outside the composite tape, and baking at high temperature to form the high-speed single-pair transmission cable.

In the embodiment, the copper-aluminum PET composite belt is coated outside the two parallel single wires, and as the conductivity of copper is much higher than that of aluminum, the total thickness of the copper-aluminum composite belt is 0.03mm and almost consistent with the thickness of a conventional aluminum foil wrapping belt (the thickness of the conventional aluminum foil belt is 0.025-0.03 mm), and the conductive base layer of the copper-aluminum composite belt is higher than 0.01mm, the attenuation value of a cable is reduced, the shielding effect of the cable is improved, and the attenuation, crosstalk and the like are better.

The thickness of the copper-aluminum composite belt is not increased, the softness of the copper-aluminum composite belt is consistent with that of a conventional single-layer metal shielding wrapping belt, the wrapping effect of the copper-aluminum composite belt does not affect the outer diameter and hardness of a single pair of cables, two parallel single wires are tightly wrapped and tightly attached, the tightness of the two parallel single wires is consistent, the S parameter is not affected to generate a peak value, and the transmission frequency and the transmission rate of the cables are also improved.

Example 2

The novel shielded low-loss high-speed transmission cable shown in fig. 2 comprises two conductors 6 which are arranged in parallel and have the diameter of 0.16-0.51mm, and is characterized in that an insulating wrapping layer 4 is extruded outside each of the two conductors 6, a ground wire 3 is arranged between the two insulating wrapping layers 4, a copper foil PET composite belt 9 is tightly wrapped outside each of the two insulating wrapping layers 4, an aluminum foil PET composite belt 8 is wrapped outside each of the copper foil PET composite belts 9, and one or two layers of hot-melt PET belts 1 are wrapped outside each of the aluminum foil PET composite belts 8 or a plastic sheath is extruded outside each of the aluminum foil PET composite belts 8.

The utility model discloses a two insulating single lines are parallel, and the first cladding one deck copper foil PET composite band that this invention used of outside, this combined material is very thin very soft, and the compound outside of taking of copper foil PET is cladding one deck aluminium foil PET composite band again, and aluminium foil PET composite band outside carries out the hot melt PET of one deck one-way cladding or two-layer SZ to band such as cladding hot melt PET, forms single pair parallel cable to guarantee parallel high-speed transmission line pair structure compactness, the planarization that forms.

An SFP 2830 AWG single-pair transmission cable is formed by using a 0.29mm silver-plated copper conductor, extruding a layer of FEP fluoroplastic outside the conductor through FEP extrusion equipment, longitudinally wrapping a layer of copper foil PET composite tape outside the conductor in parallel, wrapping a layer of aluminum foil PET composite tape outside the composite tape, reversely wrapping a layer of hot-melt PET wrapping tape outside the aluminum foil PET composite tape, and baking at high temperature to form the high-speed single-pair transmission cable.

In the embodiment, the thin copper foil PET composite belt is coated outside the two parallel single lines, the conductivity of copper is much higher than that of aluminum, the total thickness of the copper foil PET composite belt is less than 0.01mm, and the aluminum foil PET composite belt is coated outside the copper foil PET composite belt, so that the total thickness of the metal shielding belt is about 0.03mm and almost consistent with the thickness of a conventional aluminum foil belting (the thickness of the conventional aluminum foil belting is 0.025-0.03 mm), and the total shielding performance of the metal shielding belt is far better than that of a conventional single-layer aluminum foil PET belt by coating the copper foil composite belt more, so that the attenuation value of a cable is reduced, the shielding effect of the cable is improved, and the attenuation, crosstalk and the like are better.

The total belting thickness of this embodiment does not increase, and its compliance is unanimous with conventional individual layer metallic shield band, and the effect of its cladding does not influence alone external diameter and the hardness to the cable yet, and is closely laminated, the elasticity unanimous to two parallel single line cladding, can not influence the S parameter and peak value appears, also can improve cable transmission frequency, speed.

The utility model relates to a product belongs to the high-speed transmission field of data, and the product is single to the parallel symmetry axis cable of twin-core, and its transmission frequency can reach 28GHz and above, and its transmission rate can reach 56 Gbps.

The product is mainly used in the fields of communication transmission, aerospace, information service and the like, and meets the requirements of high-speed transmission and exchange of data signals such as ultra-large capacity audio, video, images and the like: mainly comprises the following aspects

(1) Cables such as a gateway switch, a gigabit ethernet switch, an InfiniBand switch which provides cloud computing for users and the most comprehensive solution of the next generation data center are connected among cluster servers of the large data center;

(2) connecting cables such as a data center switch, a router, a host adapter and the like of the large-scale communication machine room;

(3) the method can be applied to pluggable I/O interface solutions with high speed and high density;

(4) the multi-channel interconnect can be matched to be communicated with other types of 25G modules.

It should be noted that the above embodiments are merely representative examples of the present invention. The utility model can also have a plurality of deformations. Any simple modification, equivalent changes and modifications made to the above embodiments according to the essence of the present invention should be considered as belonging to the protection scope of the present invention.

Claims

1. A novel shielded low-loss high-speed transmission cable comprises two conductors (6) which are arranged in parallel and have the diameter of 0.16-0.51mm, and is characterized in that an insulating wrapping layer (4) is extruded outside the two conductors (6) respectively, a layer of copper-aluminum PET composite wrapping tape (7) is tightly wrapped outside the two insulating wrapping layers (4), and one layer or two layers of hot-melt PET tapes (1) are wrapped outside the copper-aluminum PET composite wrapping tape (7) or a layer of plastic sheath is extruded outside the copper-aluminum PET composite wrapping tape (7).

2. The utility model provides a novel shielded low-loss high-speed transmission cable, includes two parallel arrangement, diameter at 0.16-0.51 mm's conductor (6), its characterized in that, one deck insulating coating layer (4) are extruded respectively to two conductor (6) outsides, one deck copper foil PET composite band (9) closely wraps up in two insulating coating layer (4) outsides, one deck aluminium foil PET composite band (8) wraps up in the outside of copper foil PET composite band (9), one deck or two layers of hot melt PET area (1) or extrude a layer plastic sheath outside aluminium foil PET composite band (8).

3. The novel shielded low loss high speed transmission cable of claim 1 or 2, wherein the hot-melt PET tape is wrapped in two layers, and the direction of wrapping the two layers of hot-melt PET tape is opposite.

4. A new shielded low loss high speed transmission cable according to claim 1 or 2, characterized in that a ground wire (3) is also provided between the two insulation wraps (4).

5. A novel shielded low loss high speed transmission cable according to claim 1 or 2, wherein the conductor is one of bare copper, copper alloy, coated copper, and coated copper alloy, and the insulating coating (4) is made of polyolefin or fluoroplastic.