CN102682913A

CN102682913A - High-speed parallel symmetrical data cable with improved structure

Info

Publication number: CN102682913A
Application number: CN2012101357746A
Authority: CN
Inventors: 颜君; 孙彦伟
Original assignee: CHANGSHU HL ELECTRIC WIRE CABLE Co Ltd
Current assignee: CHANGSHU HL ELECTRIC WIRE CABLE Co Ltd
Priority date: 2012-05-04
Filing date: 2012-05-04
Publication date: 2012-09-19

Abstract

The invention discloses a high-speed parallel symmetrical data cable with an improved structure, and belongs to the technical field of signal transmission cables. The high-speed parallel symmetrical data cable comprises at least one wire pair and an outer sheath. Each wire pair comprises a first wire core and a second wire core, wherein the first wire core comprises a first conductor and a first insulating layer extruded outside the first conductor; the second wire core comprises a second conductor and a second insulating layer extruded outside the second conductor; and the first and second wire cores are attached to each other, and are parallel to each other in a length direction. A third shielding layer wraps each wire pair. The outer sheath is positioned outside the third shielding layer. The high-speed parallel symmetrical data cable is characterized in that a first shielding layer also covers the first insulating layer of each first wire core, and a second shielding layer also covers the second insulating layer of each second wire core. The high-speed parallel symmetrical data cable has the advantages that ideal characteristic impedance can be obtained, attenuation and loop loss are low, and signals can be smoothly transmitted.

Description

Structure improved high speed parallel symmetric data cable

Technical field

The invention belongs to technical field of signal transmission cables, be specifically related to a kind of structure improved high speed parallel symmetric data cable

Background technology

along with the fast development of digitlization life, to the data cable require increasingly highly, require it to have higher transmission speed and wideer transmission bandwidth.

and as data cable; Its delay of signals is poor, decay and loop loss size is the important indicator of measurement high-speed data cable always; Be called " high speed parallel symmetric data cable " like the disclosed name of Chinese utility model patent Granted publication CN201327733Y; This data cable is at least one pair of line three layers of screen that externally have been wrapped; Sheathed oversheath outside three layers of screen, wherein every pair of line is to having comprised first core, second core, each core comprises that all conductor overlays on the outer insulating barrier of conductor with squeezing.Above-mentioned data cable adopts the wrapped formation of multilayer dielectric layer, though the gap of evenly differing that produces because of pair twist before having improved has greatly been reduced to a certain extent and postponed poor, decay and the loop is lost.But find through practice,, still can produce the phenomenon of interference, cause the loss of signal attenuation and loop, can not show gratifying laser propagation effect though online first, second internal core has insulating barrier to separate.

In view of said circumstances, be necessary the structure of the data cable in the prior art is improved, the technical scheme that will introduce below is based on producing under this background

Summary of the invention

task of the present invention is that a kind of structure improved high speed parallel symmetric data cable will be provided, and that it not only can effectively control and greatly reduce to postpone is poor, lose in decay and loop, and can stablize data transmission performance.

task of the present invention is accomplished like this; A kind of structure improved high speed parallel symmetric data cable; Comprise at least one pair of line to and oversheath, the every pair of line is to comprising first core, second core, described first core comprises that first conductor overlays on the first outer insulating barrier of first conductor with squeezing; And described second core comprises that second conductor overlays on the second outer insulating barrier of second conductor with squeezing; First core, second core constitute parallel against each other and in the longitudinal direction, and at described every pair of line the 3rd screen that externally has been wrapped respectively, described oversheath is positioned at outside described the 3rd screen; Be characterized in: outside first insulating barrier of said first core, also be coated with first screen, outside second insulating barrier of said second core, equally also be coated with the secondary shielding layer.

in a specific embodiment of the present invention, described line is to also including an earth connection, and described earth connection is followed in described first core, second core and is coated in described the 3rd screen at length direction.

in another specific embodiment of the present invention, described the 3rd screen is provided with the 4th screen outward, outside described the 4th screen, is provided with the 5th screen, and described oversheath is positioned at outside described the 5th screen.

in another specific embodiment of the present invention, described first screen, secondary shielding layer, the 3rd screen, the 4th screen respectively are metallic film.

in another specific embodiment of the present invention, described metallic film is a kind of in aluminium foil polyester belt laminated film, Copper Foil polyester belt laminated film or the tinfoil paper polyester belt laminated film.

in of the present invention and then specific embodiment, described the 5th screen is the metal wire knitted net.

technical scheme that the present invention recommended; Owing to outside first insulating barrier of first core, increased by first screen, outside second insulating barrier of second core, increased the secondary shielding layer, can more effectively control and stablize every pair of parallel construction that line is right; Guarantee that the distance between first core, second core is consistent; Thereby can obtain the Ideal Characteristics impedance, make that simultaneously the loss of decay and loop is littler, the signal transmission is more smooth and easy.

Description of drawings

Fig. 1 is the structural representation of one embodiment of the invention.

Fig. 2 is the structure cutaway view of another embodiment of the present invention.

Among figure: 1. line is to, 11. first cores, 111. first conductors, 112. first insulating barriers, 113. first screens, 12. second cores, 121. second conductors, 122. second insulating barriers, 123. secondary shielding layers, 13. earth connections; 2. oversheath; 3. the 3rd screen; 4. the 4th screen; 5. the 5th screen.

Embodiment

can be expressly understood technical spirit of the present invention and beneficial effect more for the auditor that the makes Patent Office especially public; The applicant general combines accompanying drawing to elaborate with the mode of embodiment below; But the description to embodiment all is not the restriction to the present invention program, any according to the present invention design done only for pro forma but not substantial equivalent transformation all should be regarded as technical scheme category of the present invention.

Embodiment 1

see also Fig. 1, and according to the known general knowledge of industry, the line of data cable has a pair of to 1, and two pairs, four pairs, eight pairs and 16 pairs, in addition more reciprocity.Reflecting this, can not deny to reach all the other because of having enumerated a pair of among Fig. 1 of the present invention.Because each line in same data cable is on all four to 1 structure, so the applicant only selects one of which and describes.Each line comprises first core 11, second core 12 to 1; First core 11 comprises first conductor 111, squeeze first insulating barrier 112 that protects first conductor 111 outside and crowded protects first screen 113 outside first insulating barrier 112; Likewise; Second core 12 comprises second conductor 121, squeeze second insulating barrier 122 that protects second conductor 121 outside and crowded protects secondary shielding layer 123, the first core 11 outside second insulating barrier 122, second core 12 keeping parallelism along its length under the state that reclines each other each other.In order to make the electric current that comes from screen import the earth, therefore promptly follow in first core 11, second core 12 and added an earth connection 13 at the length direction of first core 11, second core 12.By Fig. 1 finding, the every pair of line is to 1 outer the 3rd screen 3, the 4th screen 4 and the 5th screen 5 of being wrapped successively, and outermost layer is arranged with oversheath 2, so just can make loop loss be able to ultimate attainment reducing.Described first screen 113, secondary shielding layer 123, the 3rd screen 3, the 4th screen 4 respectively are metallic film; Described metallic film can be aluminium foil polyester belt laminated film, also can be Copper Foil polyester belt laminated film or tinfoil paper polyester belt laminated film.Described the 5th screen 5 is the metal wire knitted net.

Embodiment 2:

see also Fig. 2; In the present embodiment; Described line has two pairs to 1, and the two pairs of lines are identical to 1 structure, and is up and down and laterally arranges; Each line comprises first core 11, second core 12 to 1; First core 11 comprises first conductor 111, squeeze first insulating barrier 112 that protects first conductor 111 outside and squeeze and protect first screen 113 first insulating barrier 112 outside, and likewise, second core 12 comprises that second conductor 121, crowded second insulating barrier 122 and crowded that protects outside second conductor 121 protect the secondary shielding layer 123 outside second insulating barrier 122; First core 11, second core 12 be keeping parallelism along its length under the state that reclines each other each other, adds earth connection 13 at the length direction of first core 11, second core 12.By Fig. 2 finding; The two pairs of lines are to 1 outer the 3rd screen 3, the 4th screen 4 and the 5th screen 5 of being wrapped successively; Outermost layer is arranged with oversheath 2; Described first screen 113, secondary shielding layer 123, the 3rd screen 3, the 4th screen 4 equally respectively are metallic film, and described metallic film can be aluminium foil polyester belt laminated film, also can be Copper Foil polyester belt laminated film or tinfoil paper polyester belt laminated film.Described the 5th screen 5 is similarly the metal wire knitted net.

In sum; The present invention can not only obtain stable ideal characterisitics impedance owing to outside each single core, all increased one deck screen, and can carry out the subjectivity adjustment control of characteristic impedance; Lose still less in decay and loop simultaneously, and it is higher to obtain the signal transmission frequency

Claims

1. a kind of structure improved high speed parallel symmetric data cable; Comprise that at least one pair of line is to (1) and oversheath (2); Every pair of line comprises first core (11), second core (12) to (1); Described first core (11) comprises first conductor (111) and squeezes first insulating barrier (112) that overlays on outside first conductor (111); And described second core (12) comprises second conductor (121) and squeeze second insulating barrier (122) that overlays on outside second conductor (121); First core (11), second core (12) constitute parallel against each other and in the longitudinal direction, and at described every pair of line the 3rd screen (3) that has been wrapped respectively outside to (1), described oversheath (2) is positioned at outside described the 3rd screen (3); It is characterized in that: outside first insulating barrier (112) of said first core (11), also be coated with first screen (113), outside second insulating barrier (122) of said second core (12), equally also be coated with secondary shielding layer (123).

2. structure improved high speed parallel symmetric data cable according to claim 1; It is characterized in that described line also includes an earth connection (13) to (1), described earth connection (13) is followed in described first core (11), second core (12) and is coated in described the 3rd screen (3) at length direction.

3. structure improved high speed parallel symmetric data cable according to claim 1; It is characterized in that outer the 4th screen (4) that is provided with of described the 3rd screen (3); Outside described the 4th screen (4), be provided with the 5th screen (5), described oversheath (2) is positioned at outside described the 5th screen (5).

4. is characterized in that according to claim 1 or 3 described structure improved high speed parallel symmetric data cables described first screen (113), secondary shielding layer (123), the 3rd screen (3), the 4th screen (4) respectively are metallic film.

5. Structure improved high speed parallel symmetric data cable according to claim 3 is characterized in that described the 5th screen (5) is the metal wire knitted net