Multiple electromagnetic shielding type high-speed transmission cable

Abstract

The invention discloses a multiple electromagnetic shielding type high-speed transmission cable. The multiple electromagnetic shielding type high-speed transmission cable comprises a plurality of wires, an outer metal shielding sleeve and an inner metal shielding sleeve, the plurality of leads comprise a plurality of high-speed differential signal transmission lead pairs, a plurality of grounding leads, a plurality of power leads and a plurality of conventional signal leads, and the plurality of leads are arranged into a cluster structure. The outer metal shielding sleeve surrounds the bundling structure of the plurality of wires. The inner metal shielding sleeve is arranged in the outer metal shielding sleeve and surrounds part of the wires. A grounding lead or a power lead is arranged between the two high-speed differential signal transmission lead pairs, and a grounding lead or a power lead is arranged between the two conventional signal leads. And each high-speed differential signal transmission wire pair and each conventional signal wire form electromagnetic shielding in the circumferential direction and the radial direction of the multiple electromagnetic shielding type high-speed transmission cable.

Description

Technical Field

[0001] The present invention relates to the technical field of a high-speed transmission cable, and in particular to a multi-electromagnetic shielding high-speed transmission cable in which a signal conductor can generate electromagnetic shielding in both the circumferential direction and the radial direction. Background Art

[0002] The two ends of the cable are usually connected to the male electrical connector, which forms an electrical connection with the female electrical connector of the electronic device or electronic module, so as to transmit electronic signals between the electronic devices or electronic modules. At present, due to the development of high-speed transmission technology, the signals transmitted in the circuit or wire are gradually dominated by high-frequency signals. High-frequency signals will generate electric field alternation at high frequency in the conductor, and the high-frequency electric field alternation will generate electromagnetic wave radiation. Such electromagnetic wave radiation will affect other signals transmitted on the wire when transmitted to other wires, forming noise or distorting the signal. Therefore, existing cables are provided with an electromagnetic shielding structure to solve the problem of electromagnetic wave radiation affecting other signals.

[0003] Existing cables, such as those disclosed in Chinese patent CN219040136U, include a shielding protective layer covering all wires and a primary shielding layer formed on the outer peripheral wall of each signal cable. However, since such existing cables must form a primary shielding layer on the outer peripheral wall of each signal cable, not only is the manufacturing process relatively complicated, but the primary shielding layer on the outer peripheral wall of each signal cable also causes a poor shielding effect. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a multi-electromagnetic shielding high-speed transmission cable to solve the problems of complicated manufacturing process and poor shielding effect of existing cables.

[0005] The present invention provides a multiple electromagnetic shielding type high-speed transmission cable, which includes multiple conductors, an outer metal shielding sleeve and an inner metal shielding sleeve. The multiple conductors include multiple high-speed differential signal transmission conductor pairs, multiple grounding conductors, multiple power conductors and multiple conventional signal conductors, and the multiple conductors are arranged in a cluster structure, so that the multiple electromagnetic shielding type high-speed transmission cable forms a cylindrical shape. The outer metal shielding sleeve surrounds the cluster structure of the multiple conductors and has a length equal to that of the multiple conductors. The inner metal shielding sleeve is arranged inside the outer metal shielding sleeve, surrounding part of the multiple conductors. A grounding conductor or a power conductor is arranged between two high-speed differential signal transmission conductor pairs, and a grounding conductor or a power conductor is arranged between two conventional signal conductors, so that each high-speed differential signal transmission conductor pair and each conventional signal conductor form electromagnetic shielding in the circumferential direction and radial direction of the multiple electromagnetic shielding type high-speed transmission cable.

[0006] In another embodiment, it further includes an outer insulating sheath, which is coated on the outer circumference of the outer metal shielding sheath.

[0007] In another embodiment, it further includes an inner insulating sheath, which covers the inner circumference of the inner metal shielding sheath.

[0008] In another embodiment, the inner insulating jacket covers portions of the plurality of wires.

[0009] In another embodiment, a first annular accommodation space is formed between the outer metal shielding sleeve and the inner metal shielding sleeve, and a plurality of high-speed differential signal transmission wire pairs and a plurality of grounding wires are arranged in the first accommodation space in a staggered configuration along the circumferential direction.

[0010] In another embodiment, each high-speed differential signal transmission conductor has a first metal core wire and a first insulating sheath covering the first metal core wire, each grounding conductor has a second metal core wire and a second insulating sheath covering the second metal core wire, the diameter of the first insulating sheath is equal to that of the second insulating sheath, and the first insulating sheath and the second insulating sheath are both in contact with the outer metal shielding sheath and the inner metal shielding sheath.

[0011] In another embodiment, it also includes an inner insulating covering sleeve, which covers the inner circumferential surface of the inner metal shielding sleeve, wherein a second accommodating space is formed in the inner insulating covering sleeve, and the multiple power wires and the multiple conventional signal wires are arranged in the second accommodating space in an interlaced manner along the circumferential direction.

[0012] In another embodiment, a power conductor or a ground conductor is disposed at the center of the second accommodating space, and the power conductor and the conventional signal conductor surround the power conductor or the ground conductor disposed at the center.

[0013] In another embodiment, each power conductor has a third metal core wire and a third insulating sheath covering the third metal core wire, each conventional signal conductor has a fourth metal core wire and a fourth insulating sheath covering the fourth metal core wire, the diameter of the third insulating sheath is equal to that of the fourth insulating sheath, and the third insulating sheath and the fourth insulating sheath are both abutted against the inner insulating sheath.

[0014] In another embodiment, the diameter of the first insulating sheath is greater than the diameter of the third insulating sheath.

[0015] The multiple electromagnetic shielding type high-speed transmission cable of the present invention is provided with a grounding conductor or a power conductor between two high-speed differential signal transmission conductor pairs, and a grounding conductor or a power conductor between two conventional signal conductors, and an outer metal shielding sleeve and an inner metal shielding sleeve are provided at the same time, covering and separating multiple high-speed differential signal transmission conductor pairs, multiple grounding conductors, multiple power conductors and multiple conventional signal conductors, so that each high-speed differential signal transmission conductor pair and each conventional signal conductor form electromagnetic shielding in the circumferential direction and radial direction of the multiple electromagnetic shielding type high-speed transmission cable, so as to achieve an excellent shielding effect and avoid signal crosstalk or distortion. In addition, multiple high-speed differential signal transmission conductor pairs, multiple grounding conductors, multiple power conductors and multiple conventional signal conductors are closely arranged to achieve high true roundness of the multiple electromagnetic shielding type high-speed transmission cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional view of an embodiment of a multi-electromagnetic shielding high-speed transmission cable of the present invention.

[0017] Figure 2 1 is a graph showing the impedance values ​​of an embodiment of a multi-electromagnetic shielding high-speed transmission cable according to the present invention.

[0018] Figure 3 FIG. 4 is a graph showing the relationship between S parameters and signal frequency of an embodiment of a multi-electromagnetic shielding high-speed transmission cable of the present invention.

[0019] Explanation of the reference numerals: 1-multiple electromagnetic shielding high-speed transmission cable; 10-conductor; 11-high-speed differential signal transmission conductor pair; 12-ground conductor; 13-power conductor; 14-conventional signal conductor; 20-outer metal shielding sleeve; 30-inner metal shielding sleeve; 40-outer insulating sheath; 50-inner insulating sheath; 111-first metal core wire; 112-first insulating sheath; 121-second metal core wire; 122-second insulating sheath; 131-third metal core wire; 132-third insulating sheath; 141-fourth metal core wire; 142-fourth insulating sheath; S1-first accommodating space; S2-second accommodating space. DETAILED DESCRIPTION

[0020] See also Figure 1 , which shows an embodiment of the multiple electromagnetic shielding high-speed transmission cable of the present invention. The multiple electromagnetic shielding high-speed transmission cable 1 of this embodiment comprises a plurality of conductors 10, an outer metal shielding sleeve 20, an inner metal shielding sleeve 30, an outer insulating sheath 40 and an inner insulating sheath 50.

[0021] The plurality of conductors 10 include a plurality of high-speed differential signal transmission conductor pairs 11, a plurality of ground conductors 12, a plurality of power conductors 13 and a plurality of conventional signal conductors 14. The plurality of conductors 10 are arranged in a bundle structure, so that the multi-electromagnetic shielding high-speed transmission cable 1 forms a cylindrical shape.

[0022] The outer metal shielding sleeve 20 surrounds the bundled structure of the wires 10 and has a length equal to that of the wires. The inner metal shielding sleeve 30 is disposed inside the outer metal shielding sleeve 20, surrounding part of the wires 10. A first annular accommodation space S1 is formed between the outer metal shielding sleeve 20 and the inner metal shielding sleeve 30, and a plurality of high-speed differential signal transmission wire pairs 11 and a plurality of grounding wires 12 are disposed in the first accommodation space S1 in a staggered configuration along the circumferential direction. That is, a grounding wire 12 is provided on each side of each high-speed differential signal transmission wire pair 11 along the circumferential direction, and a grounding wire 12 is provided between two adjacent high-speed differential signal transmission wire pairs 11. The outer metal shielding sleeve 20 can be a copper mesh, aluminum foil or a metal braided mesh sleeve to absorb or reflect electromagnetic waves.

[0023] Each high-speed differential signal transmission conductor 11 has a first metal core wire 111 and a first insulating sheath 112 covering the first metal core wire 111. Each grounding conductor 12 has a second metal core wire 121 and a second insulating sheath 122 covering the second metal core wire 121. The first metal core wire 111 and the second metal core wire 121 can be single-core wires or multi-core wires. The diameter of the first insulating sheath 112 is equal to that of the second insulating sheath 122, and the first insulating sheath 112 and the second insulating sheath 122 are both in contact with the outer metal shielding sheath 20 and the inner metal shielding sheath 30, so that the high-speed differential signal transmission conductor 11 and the grounding conductor 12 are densely arranged in the annular first accommodating space S1. The first insulating sheath 112 and the second insulating sheath 122 can be made of polyvinyl chloride (PVC), polyethylene or cross-linked polyethylene (XLPE).

[0024] A second accommodating space S2 is formed in the inner metal shielding sleeve 30, and the power conductor 13 and the conventional signal conductor 14 are arranged in the second accommodating space S2 in a staggered manner along the circumferential direction. That is, a power conductor 13 is respectively provided on both sides of each conventional signal conductor 14 along the circumferential direction, and a power conductor 13 is provided between two adjacent conventional signal conductors 14. A power conductor 13 or a ground conductor 12 is arranged at the center of the second accommodating space S2, and the staggered power conductors 13 and conventional signal conductors 14 surround the power conductor 13 or ground conductor 12 arranged at the center. The power conductor 13 or ground conductor 12 arranged at the center can be used to support the cluster structure formed by the staggered power conductors 13 and conventional signal conductors 14, and can also play the effect of absorbing electromagnetic waves. The inner metal shielding sleeve 30 can be a copper mesh, aluminum foil or a metal braided mesh sleeve to absorb or reflect electromagnetic waves.

[0025] Each power conductor 13 has a third metal core wire 131 and a third insulating sheath 132 covering the third metal core wire 131, and each conventional signal conductor 14 has a fourth metal core wire 141 and a fourth insulating sheath 142 covering the fourth metal core wire 141, and the diameter of the third insulating sheath 132 is equal to that of the fourth insulating sheath 142. The third metal core wire 131 and the fourth metal core wire 141 can be single-core wires or multi-core wires. The third insulating sheath 132 and the fourth insulating sheath 142 can be made of polyvinyl chloride (PVC), polyethylene or cross-linked polyethylene (XLPE).

[0026] In this embodiment, the diameter of the first insulating sheath 112 is greater than the diameter of the third insulating sheath 132. In other embodiments, the diameter of the first insulating sheath 112 may be equal to or smaller than the diameter of the third insulating sheath 132.

[0027] The outer insulating sheath 40 is coated on the outer circumference of the outer metal shielding sheath 20 to protect the outer metal shielding sheath 20 and the wire 10. The inner insulating sheath 50 covers the inner circumference of the inner metal shielding sheath 30 and is used to fill part of the second accommodation space S2, and the third insulating sheath 132 of the power wire 13 and the fourth insulating sheath 142 of the conventional signal wire 14 are both in contact with the inner insulating sheath 50, so that the power wire 13 and the conventional signal wire 14 are positioned in the second accommodation space S2. The outer insulating sheath 40 and the inner insulating sheath 50 can be made of polyvinyl chloride (PVC), polyethylene or cross-linked polyethylene (XLPE).

[0028] In other embodiments, the high-speed differential signal transmission conductor pair 11 and the power conductor 13 may be arranged in a staggered manner in the first accommodation space S1 along the circumferential direction, and the conventional signal conductor 14 and the ground conductor 12 may be arranged in a staggered manner in the second accommodation space S2 along the circumferential direction. The high-speed differential signal transmission conductor pair 11 and the conductors connected to the functional pins may be arranged in a staggered manner in the first accommodation space S1 along the circumferential direction, and the conventional signal conductor 14 and the conductors connected to the functional pins may be arranged in a staggered manner in the second accommodation space S2 along the circumferential direction. Alternatively, the high-speed differential signal transmission conductor pair 11 may be arranged in the second accommodation space S2, and the conventional signal conductor 14 may be arranged in the first accommodation space S1.

[0029] A grounding conductor 12 or a power conductor 13 is arranged between two high-speed differential signal transmission conductor pairs 11, and a grounding conductor 12 or a power conductor 13 is arranged between two conventional signal conductors 14, so that each high-speed differential signal transmission conductor pair 11 and each conventional signal conductor 14 form an electromagnetic shielding in the circumferential direction. In addition, the high-speed differential signal transmission conductor pair 11 is arranged between the outer metal shielding sleeve 20 and the inner metal shielding sleeve 30, and the conventional signal conductor 14 is arranged in the inner metal shielding sleeve 30, so that the high-speed differential signal transmission conductor pair 11 and the conventional signal conductor 14 form an electromagnetic shielding in the radial direction through the inner metal shielding sleeve 30, and the high-speed differential signal transmission conductor pair 11 and the external environment also form an electromagnetic shielding in the radial direction.

[0030] The multi-electromagnetic shielding high-speed transmission cable 1 of the present invention can be used in combination with a variety of male end electrical connectors, such as a USB type C electrical connector, which has four high-speed differential signal pair pins, two conventional differential signal pair pins, four ground pins, four power pins and four functional pins; or used in combination with a DisplayPort electrical connector, which has five high-speed differential signal pair pins, seven ground pins, two power pins and one functional pin; or used in combination with an HDMI electrical connector, which has four high-speed differential signal pair pins, four shielding pins, one power pin, one ground pin and five functional pins.

[0031] See also Figure 2 and Figure 3 , which represents the relationship curve between the impedance value and S parameter of the multiple electromagnetic shielding high-speed transmission cable 1 of the present invention when used in combination with the USB type C male electrical connector. The multiple electromagnetic shielding high-speed transmission cable 1 of the present invention when used in combination with the USB male electrical connector complies with the USB specification.

[0032] The multiple electromagnetic shielding type high-speed transmission cable of the present invention is provided with a grounding conductor or a power conductor between two high-speed differential signal transmission conductor pairs, and a grounding conductor or a power conductor between two conventional signal conductors, and an outer metal shielding sleeve and an inner metal shielding sleeve are provided at the same time, covering and separating multiple high-speed differential signal transmission conductor pairs, multiple grounding conductors, multiple power conductors and multiple conventional signal conductors, so that each high-speed differential signal transmission conductor pair and each conventional signal conductor form electromagnetic shielding in the circumferential direction and radial direction of the multiple electromagnetic shielding type high-speed transmission cable, so as to achieve an excellent shielding effect and avoid signal crosstalk or distortion. In addition, multiple high-speed differential signal transmission conductor pairs, multiple grounding conductors, multiple power conductors and multiple conventional signal conductors are closely arranged to achieve high true roundness of the multiple electromagnetic shielding type high-speed transmission cable.

[0033] The above description is only a preferred embodiment of the present invention, and it cannot be used to limit the scope of the implementation of the present invention. That is, all simple equivalent changes and modifications made according to the claims and the description of the present invention are still within the scope of the present invention. In addition, any embodiment or claim of the present invention does not have to achieve all the purposes, advantages or features provided by the present invention. In addition, the abstract and the title are only used to assist in searching patent documents, and are not used to limit the scope of protection of the present invention. In addition, the terms "first", "second", etc. mentioned in this specification or claims are only used to name the name of the element or distinguish different embodiments or scopes, and are not used to limit the upper or lower limit of the number of elements.

Claims

1. A multi-electromagnetic shielding high-speed transmission cable, characterized in that: include: A plurality of conductors, the plurality of conductors comprising a plurality of high-speed differential signal transmission conductor pairs, a plurality of ground conductors, a plurality of power conductors and a plurality of conventional signal conductors, the plurality of conductors being arranged in a bundle structure so that the multiple electromagnetic shielding high-speed transmission cable forms a cylindrical shape; An outer metal shielding sleeve surrounding the bundled structure of the plurality of wires and having a length equal to that of the plurality of wires; as well as An inner metal shielding sleeve, disposed inside the outer metal shielding sleeve and surrounding a portion of the plurality of wires; One of the grounding conductors or one of the power conductors is arranged between two of the plurality of high-speed differential signal transmission conductor pairs, and one of the grounding conductors or one of the power conductors is arranged between two of the conventional signal conductors, so that each of the plurality of high-speed differential signal transmission conductor pairs and each of the plurality of conventional signal conductors form electromagnetic shielding in the circumferential direction and radial direction of the multiple electromagnetic shielding high-speed transmission cable.

2. The multi-electromagnetic shielding high-speed transmission cable according to claim 1, characterized in that: It also includes an outer insulating sheath, which is coated on the outer peripheral surface of the outer metal shielding sheath.

3. The multi-electromagnetic shielding high-speed transmission cable as claimed in claim 2, characterized in that: It also includes an inner insulating sheath, which covers the inner circumference of the inner metal shielding sheath.

4. The multi-electromagnetic shielding high-speed transmission cable as claimed in claim 3, characterized in that: The inner insulating sheath covers portions of the plurality of conductors.

5. The multi-electromagnetic shielding high-speed transmission cable according to claim 1, wherein: A first annular accommodation space is formed between the outer metal shielding sleeve and the inner metal shielding sleeve. The plurality of high-speed differential signal transmission wire pairs and the plurality of grounding wires are arranged in the first accommodation space in a staggered configuration along a circumferential direction.

6. The multi-electromagnetic shielding high-speed transmission cable as claimed in claim 5, characterized in that: Each of the high-speed differential signal transmission conductors has a first metal core wire and a first insulating sheath covering the first metal core wire, and each of the grounding conductors has a second metal core wire and a second insulating sheath covering the second metal core wire. The diameter of the first insulating sheath is equal to that of the second insulating sheath, and the first insulating sheath and the second insulating sheath are both in contact with the outer metal shielding sheath and the inner metal shielding sheath.

7. The multi-electromagnetic shielding high-speed transmission cable according to claim 5, characterized in that: It also includes an inner insulating sheath, which covers the inner circumference of the inner metal shielding sheath, wherein a second accommodating space is formed in the inner insulating sheath, and the multiple power conductors and the multiple conventional signal conductors are arranged in the second accommodating space in a staggered manner along the circumferential direction.

8. The multi-electromagnetic shielding high-speed transmission cable as claimed in claim 7, characterized in that: One of the power conductors or a ground conductor is disposed at the center of the second accommodating space, and the plurality of power conductors and the plurality of conventional signal conductors surround the power conductor or the ground conductor disposed at the center.

9. The multi-electromagnetic shielding high-speed transmission cable according to claim 7, wherein: Each of the power conductors has a third metal core wire and a third insulating sheath covering the third metal core wire, and each of the conventional signal conductors has a fourth metal core wire and a fourth insulating sheath covering the fourth metal core wire. The diameter of the third insulating sheath is equal to that of the fourth insulating sheath, and the third insulating sheath and the fourth insulating sheath are both in contact with the inner insulating sheath.

10. The multi-electromagnetic shielding high-speed transmission cable according to claim 9, characterized in that: The diameter of the first insulating sheath is greater than the diameter of the third insulating sheath.

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