CN212809894U - High-frequency data transmission line - Google Patents

Abstract

The utility model discloses a high-frequency data transmission line, which comprises a conductor part. The conductor part comprises: at least one first wire core group, the first wire core group comprises: two wires, and each of the wires comprises: a first wire core group. A conductor is formed by twisting seven bare copper wires with a diameter of 0.07±0.008mm; a first insulating layer is coated on the first conductor, and its outer diameter is 0.50±0.05mm; a ground wire is connected with Two of the wires are twisted with each other; an aluminum foil is wrapped around the two wires and one of the ground wires, the thickness of the aluminum foil is 13±3μm, and the width is 4±1mm; a first wrapping layer , wrapped around the aluminum foil, and the winding pitch is 5±0.5mm. The high-frequency characteristic parameters of the transmission line of the utility model are more optimized, and the transmission quality is high.

Description

A high frequency data transmission line

technical field

The utility model relates to the technical field of signal lines, in particular to a high-frequency data transmission line.

Background technique

With the continuous development of information technology and the continuous improvement of people's needs in the field of communication, traditional network data lines can no longer meet people's use requirements. In order to transmit more data content in a shorter time, improve the transmission rate, high The frequency data line has been successfully developed and put into use.

In China Patent Application No.: 201920101335.0, a high-frequency data transmission line is disclosed, which includes a wire core component, a shielding tape, a grounding component and a half-folded cover. The shielding tape is longitudinally wrapped along the extension direction of each transmission core wire. Covered on the outside of each of the transmission core wires, and the inner side walls of the shielding tape are respectively closely attached to the outer side walls of each of the transmission core wires; the grounding component includes at least one ground wire, and each of the ground wires The wires are arranged in parallel with each of the transmission core wires, and each of the ground wires is tightly attached to the outer side wall of the shielding tape; the half-folded wrapping is spirally wound around the shielding tape and each off ground. After the technical solution has been tested, its high-frequency parameters such as attenuation and characteristic impedance cannot meet the requirements and need to be further improved. In view of this, this application is made.

Utility model content

In order to solve at least one technical problem existing in the background art, the present invention proposes a high-frequency data transmission line in which parameters such as attenuation and characteristic impedance are more optimized to improve the transmission performance and transmission quality of the transmission line.

A high-frequency data transmission line proposed by the present utility model includes a conductor portion, and the conductor portion includes:

At least one first wire core group, the first wire core group includes:

two conductors, each of said conductors comprising:

a first conductor, formed by twisting seven bare copper wires with a diameter of 0.07±0.008mm;

a first insulating layer covering the first conductor with an outer diameter of 0.50±0.05mm;

a ground wire, twisted with two of the wires;

an aluminum foil, covering two of the wires and one of the ground wires, the thickness of the aluminum foil is 13±3μm, and the width is 4±1mm;

A first wrapping tape layer is wrapped around the aluminum foil, and the wrapping pitch is 5±0.5mm.

Preferably, the first insulating layer is made of FEP material.

Preferably, the first tape layer is a polytetrafluoroethylene tape with a width of 5±1 mm and a thickness of 50±10 μm.

Preferably, the transmission line further includes:

a second wrapping layer wrapped around the conductor portion;

a first braided layer covering the second tape layer;

A sheath layer is coated on the first braided layer, wherein the sheath layer is made of PVC material with a hardness of 90P.

Preferably, the second tape layer is a polytetrafluoroethylene tape with a width of 16±3 mm and a thickness of 50±10 μm.

Preferably, the conductor part further comprises:

a second core group; wherein,

The number of the first wire core groups is multiple, all of which are distributed around the second wire core group, and an accommodation space is formed between two adjacent first wire core groups and the second wrapping layer ;and,

A plurality of third wire core groups, respectively located in the plurality of the accommodating spaces, wherein at most one of the third wire core groups is arranged in any one of the accommodating spaces; wherein,

A plurality of the third wire core groups, a plurality of the second wire core groups, and the first wire core groups are twisted with each other to form the conductor portion.

Preferably, the second wire core group includes:

a second conductor, formed by twisting 62 tinned copper wires with a diameter of 0.08±0.008mm;

a second insulating layer covering the second conductor;

A third braided layer is disposed on the second insulating layer.

Preferably, the second insulating layer is made of FEP material.

Preferably, the third wire core group includes:

a third conductor, formed by twisting seven tinned copper wires with a diameter of 0.05±0.008mm;

A third insulating layer covers the third conductor.

Preferably, the third insulating layer is made of FEP material.

A method of manufacturing a high-frequency data transmission line, comprising:

A conductor portion is provided, the conductor portion including:

At least one first wire core group, the first wire core group includes:

two conductors, each of said conductors comprising:

a first conductor, formed by twisting seven bare copper wires with a diameter of 0.07±0.008mm;

A first insulating layer, covering the first conductor, with an outer diameter of 0.50±0.05mm, the first insulating layer is extruded by an extruder, the line speed is 100±5m/min, and the extrusion temperature is 330℃- At 390° C., the adhesion between the first insulating layer and the first conductor is 0.98-2.94N.

A ground wire, twist the ground wire and the two described wires with each other, and twist them in a clockwise direction with a twisting machine, and the twist distance is 13±2mm.

An aluminum foil, which is wrapped around two of the wires and one of the ground wires, the thickness of the aluminum foil is 13±3 μm, and the width is 4±1 mm.

A first wrapping layer, wrapping the first wrapping layer on the aluminum foil, the wrapping pitch is 5±0.5mm, and the production line speed is 9±1m/min.

Preferably, a second tape layer is wrapped around the conductor portion;

Covering a first braided layer on the second tape layer;

A sheath layer is covered on the first braided layer, wherein the sheath layer is made of PVC material with a hardness of 90P.

The beneficial effects brought by one aspect disclosed by the present utility model are:

By optimizing the structure of the conductor part and designing the relevant dimensions and production parameters, the present utility model makes the attenuation, characteristic impedance and other high-frequency parameters of the transmission line of the present utility model more optimized, thereby effectively improving the transmission quality and improving the transmission performance.

Description of drawings

1 is a schematic cross-sectional view of a transmission line disclosed by the utility model;

Fig. 2 is the cross-sectional schematic diagram of the wire disclosed by the utility model;

3 is a schematic cross-sectional view of the third wire core group disclosed in the present invention.

Detailed ways

It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The solution is clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left" and "right" are based on the drawings. The orientation or positional relationship is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the indicated position or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as the limit. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

1-3, a high-frequency data transmission line proposed by the present utility model includes a conductor part 1, a second wrapping layer 2, a first braided layer 3, and a sheath layer 4, wherein the second wrapping layer 4 The tape layer 2 is wrapped on the conductor part 1, and the second tape layer 2 is a polytetrafluoroethylene tape with a width of 16±3 mm and a thickness of 50±10 μm; the first braided layer 3 is wrapped on the On the second tape layer 2; the sheath layer 4 is coated on the first braided layer 3, and the sheath layer 4 is made of PVC material with a hardness of 90P.

PTFE tape is thinner and more flexible. In order to meet the requirements of the overlap ratio, if the width of the PTFE tape is large, the overlap ratio will be high, which will affect the softness and characteristic impedance of the transmission line. If the width is small, the overlap will not be enough to cover the conductor portion 1 .

The first braided layer 3 can be formed by using 16 ingots and 12 copper wires of 0.08±0.008mm, and cross-braided by a high-speed braiding machine.

The sheath layer 4 is made of PVC material with a hardness of 90P, which is more flexible. If the PVC material with lower hardness is selected, it cannot meet the UL standard, and it is easy to crack and break. If the hardness is large, the transmission line is hard and cannot achieve the effect of softness

After testing, the softness test value of the transmission line of this embodiment is less than 160TSU, while the softness of the existing product is 400TSU-800TSU.

In this embodiment, the conductor part 1 includes:

8 first wire core groups 11, the first wire core group 11 includes:

Two wires 111, each of the wires 111 includes:

A first conductor 1111 is formed by twisting seven bare copper wires 11111 with a diameter of 0.07±0.008mm; a first insulating layer 1112 is coated on the first conductor 1111, and its outer diameter is 0.50±0.05mm ; Combined with Figure 2, a bare copper wire 11111 is located in the center, and the other 6 wires are distributed around, so that the second conductor 121 forms a true circular structure, and the whole is more rounded, so that the flexibility can be improved, and the attenuation and characteristic impedance can be optimized. . The first insulating layer 1112 is made of FEP material to improve flexibility. 7 bare copper wires, and use the FEP material as the first insulating layer 1112. By controlling the diameter of the bare copper wire and the outer diameter of the first insulating layer 1112, the outer diameter of the first insulating layer 1112 fluctuates less, so that the The capacitance fluctuation of the wire 111 is small, so that the characteristic impedance of the wire 111 fluctuates less, and the transmission quality is improved.

A ground wire 112 is twisted with the two wires 111 .

An aluminum foil 113 is wrapped on two of the wires 111 and one of the ground wires 112 . The thickness of the aluminum foil 113 is 13±3 μm and the width is 4±1 mm; if the width is small, it is not easy to produce. If a larger width is used, it is easy to wrinkle during wrapping, which affects the characteristic impedance and softness.

A first wrapping layer 114 is wrapped around the aluminum foil 113, and the wrapping pitch is 5±0.5mm. The first wrapping layer 114 is a polytetrafluoroethylene tape with a width of 5±1 mm and a thickness of 50±10 μm. The size design of the first wrapping layer 114 needs to meet the requirements of the overlap ratio.

If the winding pitch is too large or too small, it will affect the attenuation of the transmission line.

Further, the conductor part 1 also includes:

A second wire core group 12; wherein, a plurality of the first wire core groups 11 are distributed around the second wire core group 12, and two adjacent first wire core groups 11 and the second wrap An accommodation space 14 is formed between the belt layers 2; and,

The five third wire core groups 13 are respectively located in a plurality of the accommodating spaces 14, wherein at most one of the third wire core groups 13 is arranged in any one of the accommodating spaces 14; wherein,

Five of the third wire core groups 13 , eight of the second wire core groups 12 , and the first wire core group 11 are twisted with each other to form the conductor portion 1 .

The conductor part 1 is more rounded as a whole, neatly arranged, with uniform thickness, good hand feeling, softer, and can also reduce attenuation and optimize characteristic impedance.

The second wire core group 12 includes:

A second conductor 121 is formed by twisting 62 tinned copper wires with a diameter of 0.08±0.008mm; if the number of tinned copper wires is too small, the resistance of the entire second conductor 121 is not enough, and if the number is too large, it will cause waste , and affect flexibility, characteristic impedance, etc.

A second insulating layer 122 is covered on the second conductor 121 , the second insulating layer 122 is made of FEP material and is more flexible; a third braided layer 123 is arranged on the second insulating layer 122 superior.

The tinned copper wires are twisted according to a lay pitch of 11±2 mm to form a twisted second conductor 121 .

The outer diameter of the second insulating layer 122 can be 1.02±0.05mm, and can be extruded by FEP extrusion 35# model, the extrusion temperature is 330°C-390°C, and the wire speed of the core wire is 80±5m/min; The adhesion between the two conductors 121 is 4.9-9.8N. The second core unit wire is soft, with good performance and stable high frequency characteristics.

The third braided layer 123 can be formed by braiding copper wires with a diameter of 0.08±0.008mm, which can improve the anti-interference ability, and can also be wrapped with PTFE tape at a winding pitch of 7±0.5mm. Improve flexibility and shielding effect.

Further, the third wire core group 13 includes:

A third conductor 131 is formed by twisting seven tinned copper wires 1311 with a diameter of 0.05±0.008mm; a third insulating layer 132 is covered on the third conductor 131; the third insulating layer 132 Made of FEP material.

The tinned copper wires are twisted according to a lay length of 2.8±0.03 mm to form a twisted third conductor 131 .

The outer diameter of the third insulating layer 132 can be 0.36±0.05mm, and can be extruded by FEP extrusion 35# model, the extrusion temperature is 330°C-390°C, and the wire speed of the core wire is 100±5m/min; The adhesion between the three conductors 131 is 0.98-2.94N. The second core unit wire is soft, with good performance and stable high frequency characteristics.

In the standard of the Universal Serial Bus 3.0 specification:

Regarding attenuation, the criteria are:

When using 2.5GHz test, the attenuation is -7.5dB;

When tested with 7.5GHz, the attenuation is -25dB.

Regarding the characteristic impedance, the standard is 90±7Ω.

The relevant standards are on pages 5-46 and 5-49. It can be viewed in the following web link:

https://max.book118.com/html/2017/1017/137325938.shtm.

In order to better optimize the attenuation, the fluctuation of the characteristic impedance is reduced. By improving the product in this embodiment, the actual measured high-frequency characteristic parameters are as follows:

Test length 0.75M.

Regarding attenuation, the criteria are:

When using 2.5GHz test, the attenuation is -4dB;

When tested at 7.5GHz, the attenuation is -21.5dB.

Regarding the characteristic impedance, its standard is 85±5Ω.

The attenuation of this embodiment is smaller. The characteristic impedance fluctuation is ±5Ω, which is better than the standard ±7Ω, and the fluctuation is smaller. Effectively improve the transmission quality. The high-frequency characteristic index of the transmission line in this embodiment is more optimized than the standard, and meets the product standards of customers such as Huawei and Microsoft.

In another embodiment, a method for manufacturing a high-frequency data transmission line is also disclosed,

A conductor part is provided, a second wrapping layer is wrapped around the conductor part; a first braided layer is wrapped on the second wrapping layer; a sheath is wrapped on the first braided layer layer, wherein the sheath layer is made of PVC material with a hardness of 90P.

PTFE tape is thinner and more flexible. In order to meet the requirements of the overlap ratio, if the width of the PTFE tape is large, the overlap ratio will be high, which will affect the softness and characteristic impedance of the transmission line. If the width is small, the overlap is not enough to cover the conductor part.

The first braiding layer can be formed by using 16 ingots and 12 copper wires of 0.08±0.008mm, which are cross-braided by a high-speed braiding machine, and the braiding pitch can be 41±3mm; effective shielding protection for the conductor part.

The sheath layer is made of PVC material with a hardness of 90P, which is more flexible. If the PVC material with lower hardness is selected, it cannot meet the UL standard, and it is easy to crack and break. If the hardness is large, the transmission line is hard and cannot achieve the effect of softness

After testing, the softness test value of the transmission line of this embodiment is less than 160TSU, while the softness of the existing product is 400TSU-800TSU.

The conductor section includes:

At least one first wire core group, the first wire core group includes:

two conductors, each of said conductors comprising:

A first conductor is formed by twisting seven bare copper wires with a diameter of 0.07±0.008mm; a first insulating layer is coated on the first conductor, and its outer diameter is 0.50±0.05mm. An insulating layer is extruded by an extruder, the line speed is 100±5m/min, and the extrusion temperature is 330℃-390℃, so that the capacitance of the wire is controlled at 125±2PF. During production, if the capacitance value of the wire is not satisfied, it can be adjusted by existing methods, and the wire speed, extrusion temperature, etc. can be changed; the adhesion between the first insulating layer and the first conductor is 0.98- 2.94N.

A ground wire, twist the ground wire and the two described wires with each other, and twist them in a clockwise direction with a twisting machine, and the twist distance is 13±2mm. Too large or too small lay length will affect the characteristic impedance.

An aluminum foil, which is wrapped around two of the wires and one of the ground wires, the thickness of the aluminum foil is 13±3 μm, and the width is 4±1 mm.

A first wrapping layer, wrapping the first wrapping layer on the aluminum foil, the wrapping pitch is 5±0.5mm, and the production line speed is 9±1m/min. If the winding pitch is too large or too small, the attenuation characteristics of the transmission line will be affected.

The size design principle of each component in the conductor portion may refer to the above-mentioned embodiment.

By controlling the line speed to 100±5m/min, it is avoided that the line speed is too large, which will lead to shaking, which will make the capacitance fluctuate greatly and affect the characteristic impedance. If the line speed is too small, the efficiency will be affected.

If the extrusion temperature is too high, the first insulating layer is easy to burn off; if it is too low, the first insulating layer cannot be completely plasticized, which affects the performance.

The indicators such as attenuation and characteristic impedance of the transmission line produced in this embodiment are more optimized than the UL standard, and meet the product standards of customers such as Huawei and Microsoft. For specific values, refer to the above-mentioned embodiments.

The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited to this. Equivalent replacement or modification of the new technical solution and its utility model concept shall be included within the protection scope of the present utility model.

Claims (10)

1. A high-frequency data transmission line, characterized in that it comprises a conductor portion, the conductor portion comprising: At least one first wire core group, the first wire core group includes: two conductors, each of said conductors comprising: a first conductor, formed by twisting seven bare copper wires with a diameter of 0.07±0.008mm; a first insulating layer covering the first conductor, the outer diameter of which is 0.50±0.05mm; a ground wire, twisted with two of the wires; an aluminum foil, covering two of the wires and one of the ground wires, the thickness of the aluminum foil is 13±3μm, and the width is 4±1mm; A first wrapping tape layer is wrapped around the aluminum foil, and the wrapping pitch is 5±0.5mm. 2 . The high-frequency data transmission line according to claim 1 , wherein the first insulating layer is made of FEP material. 3 . 3 . The high-frequency data transmission line according to claim 1 , wherein the first tape layer is a polytetrafluoroethylene tape with a width of 5±1 mm and a thickness of 50±10 μm. 4 . 4. The high-frequency data transmission line according to claim 1, wherein the transmission line further comprises: a second wrapping layer wrapped around the conductor portion; a first braided layer covering the second tape layer; A sheath layer is coated on the first braided layer, wherein the sheath layer is made of PVC material with a hardness of 90P. 5 . The high-frequency data transmission line according to claim 4 , wherein the second tape layer is a polytetrafluoroethylene tape with a width of 16±3 mm and a thickness of 50±10 μm. 6 . 6. The high-frequency data transmission line according to claim 4, wherein the conductor portion further comprises: a second core group; wherein, The number of the first wire core groups is multiple, all of which are distributed around the second wire core group, and an accommodation space is formed between two adjacent first wire core groups and the second wrapping layer ;and, A plurality of third wire core groups, respectively located in the plurality of the accommodating spaces, wherein at most one of the third wire core groups is arranged in any one of the accommodating spaces; wherein, A plurality of the third wire core groups, a plurality of the second wire core groups, and the first wire core groups are twisted with each other to form the conductor portion. 7. The high-frequency data transmission line according to claim 6, wherein the second wire core group comprises: a second conductor, formed by twisting 62 tinned copper wires with a diameter of 0.08±0.008mm; a second insulating layer covering the second conductor; A third braided layer is disposed on the second insulating layer. 8. The high-frequency data transmission line according to claim 7, wherein the second insulating layer is made of FEP material. 9. The high-frequency data transmission line according to claim 6, wherein the third wire core group comprises: a third conductor, formed by twisting seven tinned copper wires with a diameter of 0.05±0.008mm; A third insulating layer covers the third conductor. 10 . The high-frequency data transmission line according to claim 9 , wherein the third insulating layer is made of FEP material. 11 .

Images