阅读说明：本技术 一种高对称性高速率数据传输线 (High-symmetry high-speed data transmission line ) 是由 贾利宾 胡光祥 于 2019-10-28 设计创作，主要内容包括：本发明公开了一种高对称性高速率数据传输线,包括传输线对,所述传输线对包括内芯及包覆于内芯之外的内包覆层,所述内芯包括传导线、地线及第一绝缘层,所述传导线数量为两根,所述地线数量为两根,所述第一绝缘层包覆所述传导线和地线并且一体挤出而成；所述两根传导线平行对称排列于第一绝缘层内部,并且完全包覆在第一绝缘层内部；所述两根地线分布在传导线两侧,并且部分嵌入第一绝缘层外壁之内。本发明高对称性高速率数据传输线的传导线和地线位置固定、对称性高,能极大地提升Scd21性能和数据线速率,同时地线易拉出、组件接地简便。(The invention discloses a high-symmetry high-speed data transmission line, which comprises a transmission line pair, wherein the transmission line pair comprises an inner core and an inner cladding layer coated outside the inner core, the inner core comprises two conducting lines, two ground lines and a first insulating layer, the first insulating layer is coated on the conducting lines and the ground lines and is formed by integrally extruding; the two conducting wires are symmetrically arranged in parallel inside the first insulating layer and completely cover the inside of the first insulating layer; the two ground wires are distributed on two sides of the conducting wire and are partially embedded into the outer wall of the first insulating layer. The high-symmetry high-speed data transmission line has the advantages that the positions of the conducting wire and the ground wire are fixed, the symmetry is high, the Scd21 performance and the data wire speed can be greatly improved, the ground wire is easy to pull out, and the assembly is simple and convenient to ground.)

1. A high symmetry high rate data transmission line, characterized by: the transmission line pair comprises an inner core and an inner cladding layer wrapping the inner core, wherein the inner core comprises two conducting wires, two ground wires and a first insulating layer, and the first insulating layer wraps the conducting wires and the ground wires and is formed by integrally extruding; the two conducting wires are symmetrically arranged in parallel inside the first insulating layer and completely cover the inside of the first insulating layer; the two ground wires are distributed on two sides of the conducting wire and are partially embedded into the outer wall of the first insulating layer.

2. The high symmetry high rate data transmission line of claim 1, wherein: the two ground wires are symmetrical to each other, at least half of the two ground wires are embedded into the outer wall of the first insulating layer, and the rest part of the two ground wires are embedded into the inner cladding layer.

3. The high symmetry high rate data transmission line of claim 1, wherein: the inner cladding layer is a metal shielding layer or an inner sheath layer or is formed by combining the metal shielding layer and the inner sheath layer.

4. The high symmetry high rate data transmission line of claim 1, wherein: the conducting wire is a single or multi-strand metal wire, and the metal wire is any one of silver-plated copper, tin-plated copper, bare copper, silver-plated copper-clad steel and silver-plated copper-clad aluminum conductor.

5. The high symmetry high rate data transmission line of claim 1, wherein: the conducting wire comprises a metal wire and a second insulating layer, the metal wire is a single or multi-strand metal wire, the second insulating layer is coated outside the metal wire, and the metal wire is any one of silver-plated copper, tin-plated copper, bare copper, silver-plated copper-clad steel and a silver-plated copper-clad aluminum conductor.

6. The high symmetry high rate data transmission line of claim 1, wherein: the ground wire is a single or multi-strand metal wire, and the metal wire is any one of silver-plated copper, tin-plated copper, bare copper, silver-plated copper-clad steel and silver-plated copper-clad aluminum conductor.

7. The high symmetry high rate data transmission line of claim 1, wherein: the cross section of the first insulating layer is in a circular ring shape, an elliptical ring shape or a runway shape.

8. The high symmetry high rate data transmission line of claim 1, wherein: the first insulating layer is any one of a polyethylene insulating layer, a foamed polyethylene insulating layer, a polypropylene insulating layer, a foamed polypropylene insulating layer, a fluorinated ethylene propylene insulating layer, a meltable polytetrafluoroethylene insulating layer, a polytetrafluoroethylene insulating layer and a foamed fluorinated ethylene propylene insulating layer.

9. The high symmetry high rate data transmission line of claim 1, wherein: the transmission line pair is coated with an outer cladding layer, and the outer cladding layer is an outer metal shielding layer or an outer sheath layer or is formed by combining the outer metal shielding layer and the outer sheath layer.

10. The high symmetry high rate data transmission line according to any one of claims 1 to 9, wherein: the number of the transmission line pairs is one pair, two pairs or eight pairs.

Technical Field

The invention relates to the technical field of communication wires and cables, in particular to a high-symmetry high-speed data transmission line.

Background

With the development of mobile internet, more and more devices are connected to a mobile network, new services and applications are emerging, and mobile data traffic is suddenly increased, so that it is necessary to further increase data transmission frequency in the future, and the performance of a transmission medium-transmission line becomes a key factor. Differential transmission is a signal transmission technology, and differential transmission transmits signals on two wires, wherein the amplitudes of the two signals are the same, the phases of the two signals are opposite, and the signals transmitted on the two wires are differential signals. Two wires for transmitting differential signals are required to be fixed in position and high in symmetry.

However, the existing high-speed transmission lines (including SAS, SFP, QSFP, etc.) all adopt a structure in which a shielding tape is covered by an independent set of an insulating core wire and a ground wire, and due to the limitation of a covering process, the position of a transmission wire of the structure is not fixed enough, and the symmetry performance is poor, so that the Scd21 which is the most critical in high-frequency transmission performance is unstable, and the applicable transmission frequency of the structure is gradually difficult to meet the increasing transmission spread spectrum requirement.

Disclosure of Invention

The technical problem to be solved by the present invention is to provide a high-symmetry high-speed data transmission line according to the above-mentioned deficiencies of the prior art, the data transmission line has fixed positions of the conducting wire and the ground wire, has high symmetry, can greatly improve the performance of Scd21 and the speed of the data wire, and has easy pulling out of the ground wire and simple and convenient assembly grounding.

In order to solve the technical problems, the technical scheme of the invention is as follows: a high-symmetry high-speed data transmission line comprises a transmission line pair, wherein the transmission line pair comprises an inner core and an inner cladding layer wrapping the inner core, the inner core comprises two conducting lines, two ground lines and a first insulating layer, and the first insulating layer wraps the conducting lines and the ground lines and is formed by integrally extruding; the two conducting wires are symmetrically arranged in parallel inside the first insulating layer and completely cover the inside of the first insulating layer; the two ground wires are distributed on two sides of the conducting wire and are partially embedded into the outer wall of the first insulating layer.

Preferably, the two ground wires are symmetrical to each other, at least half of the two ground wires are embedded in the outer wall of the first insulating layer, and the rest part of the two ground wires are embedded in the inner cladding layer.

Preferably, the inner cladding layer is a metal shielding layer or an inner sheath layer or is formed by combining the metal shielding layer and the inner sheath layer.

Preferably, the conducting wire is a single or multi-strand metal wire, and the metal wire is any one of silver-plated copper, tin-plated copper, bare copper, silver-plated copper-clad steel and silver-plated copper-clad aluminum conductor.

Preferably, the conductive wire comprises a metal wire and a second insulating layer, the metal wire is a single or multi-strand metal wire, the second insulating layer is coated outside the metal wire, and the metal wire is any one of silver-plated copper, tin-plated copper, bare copper, silver-plated copper-clad steel and a silver-plated copper-clad aluminum conductor.

Preferably, the ground wire is a single or multi-strand metal wire, and the metal wire is any one of silver-plated copper, tin-plated copper, bare copper, silver-plated copper-clad steel and silver-plated copper-clad aluminum conductor.

Preferably, the cross-sectional shape of the first insulating layer is a circular ring shape, an elliptical ring shape or a racetrack shape.

Preferably, the first insulating layer is any one of a polyethylene insulating layer, a foamed polyethylene insulating layer, a polypropylene insulating layer, a foamed polypropylene insulating layer, a fluorinated ethylene propylene insulating layer, a meltable polytetrafluoroethylene insulating layer, a polytetrafluoroethylene insulating layer and a foamed fluorinated ethylene propylene insulating layer.

Preferably, the transmission line pair is externally coated with an external cladding layer, and the external cladding layer is an external metal shielding layer or an external sheath layer or is formed by combining the external metal shielding layer and the external sheath layer.

Preferably, the number of the transmission line pairs is one pair, two pairs or eight pairs.

The invention has the beneficial effects that:

1. compared with the traditional structure that the conducting wire and the ground wire are independent, the first insulating layer coats the conducting wire and the ground wire and is formed by extruding the conducting wire and the ground wire integrally, so that the conducting wire and the ground wire are fixed in position and high in symmetry, the gap area between the conducting wire and the ground wire is filled with the first insulating layer, the possibility of dielectric constant variation between the conducting wires due to asymmetry of the shape and the area of the gap is eliminated, the SCD21 performance of a product is greatly improved, and the transmission frequency of a data wire is remarkably improved.

2. Because the two ground wires are distributed on two sides of the conducting wire and are partially embedded into the outer wall of the first insulating layer, the ground wires can be easily pulled out from the side surface of the first insulating layer, and the assembly of the wire is more easily and simply grounded.

3. The center distance between the two conducting wires can be flexibly adjusted, so that the coupling ratio between the two conducting wires reaches the optimal state, and the attenuation performance of the wire is improved.

Drawings

Fig. 1 is a schematic diagram of a single-pair high-symmetry high-speed data transmission line structure according to a first embodiment of the present invention.

Fig. 2 is a schematic diagram of another single-pair high-symmetry high-speed data transmission line structure according to a first embodiment of the present invention.

Fig. 3 is a schematic structural diagram of two pairs of high-symmetry high-speed data transmission lines according to a second embodiment of the present invention.

Fig. 4 is a schematic diagram of another two pairs of high-symmetry high-speed data transmission lines according to a second embodiment of the present invention.

Fig. 5 is a schematic diagram of an eight-pair high-symmetry high-speed data transmission line structure according to a third embodiment of the present invention.

Fig. 6 is a schematic diagram of another high-symmetry high-speed data transmission line structure according to a third embodiment of the present invention.

Detailed Description

The structural and operational principles of the present invention are explained in further detail below with reference to the accompanying drawings.