EP2549490A1 - Unité de transmission avec d'un signal de diaphonie réduit - Google Patents

Unité de transmission avec d'un signal de diaphonie réduit Download PDF

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Publication number
EP2549490A1
EP2549490A1 EP20110174312 EP11174312A EP2549490A1 EP 2549490 A1 EP2549490 A1 EP 2549490A1 EP 20110174312 EP20110174312 EP 20110174312 EP 11174312 A EP11174312 A EP 11174312A EP 2549490 A1 EP2549490 A1 EP 2549490A1
Authority
EP
European Patent Office
Prior art keywords
conductor
sheath
transmission unit
surrounded
earth
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP20110174312
Other languages
German (de)
English (en)
Other versions
EP2549490B1 (fr
Inventor
Liu Da-Yu
Liu Da-Yung
Liu Teng-Lan
Jang Ben-Hwa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yes Way Enterprise Corp
Original Assignee
Yes Way Enterprise Corp
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Publication date
Application filed by Yes Way Enterprise Corp filed Critical Yes Way Enterprise Corp
Priority to EP20110174312 priority Critical patent/EP2549490B1/fr
Publication of EP2549490A1 publication Critical patent/EP2549490A1/fr
Application granted granted Critical
Publication of EP2549490B1 publication Critical patent/EP2549490B1/fr
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/02—Disposition of insulation
    • H01B7/0208—Cables with several layers of insulating material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/08—Flat or ribbon cables

Definitions

  • the present invention relates to a transmission unit, and more particularly to a transmission unit that includes conductors surrounded by sheaths of different dielectric coefficients, so that a difference in dielectric property exists between the conductors to enable reduction of crosstalk occurred during high-speed signal transmission over the transmission unit.
  • VCD video compact disk
  • DVD digital versatile disk
  • HDTV high-definition digital television
  • video call and video conference all have been introduced into people's daily life.
  • Most of the currently available audio video (AV) systems process voice and image information in a completely digitalized manner to meet the newest technological trend.
  • Different specifications and standards for AV systems have been constantly established, revised and updated, so that the AV systems can provide audio and visual signals with higher quality and can be applied to more different application fields to meet consumers' demands.
  • Digital signals must be transmitted at further increased speed without the need of compression.
  • HDMI high-definition multimedia interface
  • DVI digital visual interface
  • DisplayPort Through digitized transmission of signals via these interfaces, images of enhanced quality can be displayed on electronic devices.
  • the above-mentioned interfaces can be electrically connected to an adapter, a set-top box, a DVD player, a personal computer, a video game console, an integrated amplifier, a digital stereo system, etc. to enable long distance transmission of high quality signals at high speed, and are therefore widely welcome among consumers and can be seen everywhere now.
  • the use of these standardized digital video interfaces to transmit video signals at high speed can provide better visual effect.
  • Most cables for DisplayPort connector, DVI connector and HDMI connector are round cables or flat cables. Inside these cables, there is a plurality of metal conductors, which are respectively surrounded by an insulating layer to prevent short circuit between the metal signal conductors. Each signal pair is further surrounded by a metal shield to prevent crosstalk between the signal pair. While the metal shield can reduce the crosstalk between the signal pair, it makes the whole cable stiff, heavy and inconvenient for use. Further, to connect the cable to the terminals of the connector, it is necessary to strip a length of the metal shield from the signal pair. By doing this, scraps would be produced. Moreover, cables with conductors surrounded by metal shields could not be used with piercing terminals to enable automated assembling of cables.
  • the transmission unit with reduced crosstalk signal includes a first conductor group, which includes at least one first conductor surrounded by a first sheath and at least one second conductor surrounded by a second sheath.
  • the first and the second conductor are axially arranged corresponding to one another.
  • the first sheath has a dielectric coefficient higher than that of the second sheath.
  • the transmission unit including the first conductor surrounded by the high-dielectric first sheath can reduce the crosstalk occurred during high-speed signal transmission over the transmission unit.
  • Fig. 1 is a cross sectional view of a transmission unit with reduced crosstalk signal according to a first embodiment of the present invention.
  • the present invention is also briefly referred as a transmission unit and generally denoted by reference numeral 1 herein.
  • the transmission unit 1 of the present invention includes a first conductor group 11.
  • the first conductor group 11 includes at least one first conductor 111 surrounded by a first sheath 1111 and at least one second conductor 112 surrounded by a second sheath 1121.
  • the first and the second conductor 111, 112 are axially parallelly arranged side by side.
  • the first sheath 1111 has a dielectric coefficient higher than that of the second sheath 1121.
  • the first conductor 111 is a signal conductor
  • the second conductor 112 can be a signal conductor or an earth conductor.
  • Fig. 2 is a cross sectional view of a transmission unit 1 according to a second embodiment of the present invention.
  • the transmission unit 1 includes a first conductor group 11, a second conductor group 12 and a third conductor group 13. Since the first conductor group 11 is structurally similar to that in the first embodiment, it is not repeated described in details herein.
  • the second conductor group 12 includes at least one third conductor 121 surrounded by a first sheath 1111 and at least one fourth conductor 122 surrounded by a second sheath 1121.
  • the third conductor group 13 includes at least one fifth conductor 131 surrounded by a first sheath 1111 and at least one sixth conductor 132 surrounded by a second sheath 1121.
  • the first, second and third conductor groups 11, 12, 13 can be differential signal pairs.
  • the second embodiment there is a difference between the dielectric values of the first sheath 1111 and the second sheath 1121. Since a high-dielectric material has good ability to concentrate electric field, the use of a low-dielectric material for one conductor in each of the signal pairs can reduce electric field concentration and accordingly, reduce crosstalk noise interference between the signal pairs.
  • Fig. 3 is a cross sectional view of a transmission unit 1 according to a third embodiment of the present invention.
  • the transmission unit 1 includes a first conductor group 11 having at least one first conductor 111 surrounded by a first sheath 1111 and at least one second conductor 112; a second conductor group 12 having at least one third conductor 121 surrounded by a first sheath 1111 and at least one fourth conductor 122; a third conductor group 13 having at least one fifth conductor 131 1 surrounded by a first sheath 1111 and at least one sixth conductor 132; and a second sheath 1121 surrounding all the first sheaths 1111 and the second, fourth and sixth conductors 112, 122, 132.
  • the first, second and third conductor groups 11, 12, 13 may be differential signal pairs.
  • the transmission unit 1 includes a first conductor group 1 having at least one first conductor 111 surrounded by a first sheath 1111 and at least one second conductor 112 surrounded by a second sheath 1121; a second conductor group 12 having at least one third conductor 121 surrounded by a first sheath 1111 and at least one fourth conductor 122 surrounded by a second sheath 1121; a first earth conductor 14; a second earth conductor 15; a third earth conductor 16; and a third sheath 1131.
  • the first and second conductor groups 11, 12 can be differential signal pairs.
  • the second earth conductor 15 is arranged between the first and the second conductor group 11, 12; the first earth conductor 14 is arranged to one side of the first conductor group 11 opposite to the second earth conductor 15; and the third earth conductor 16 is arranged to one side of the second conductor group 12 opposite to the second earth conductor 15.
  • the third sheath 1113 surrounds all the first and second sheaths 1111, 1121 and the first, second and third earth conductors 14, 15, 16.
  • the first and the second sheath 1111, 1121 may have the same dielectric coefficient, which is higher than that of the third sheath 1113.
  • the transmission unit 1 includes differential signal pairs and earth conductors. There is a difference between the dielectric values of the first and second sheaths 1111, 1121 and the third sheath 1113. Since a high-dielectric material has good ability to concentrate electric field, the use of a low-dielectric material for one conductor in each of the signal pairs can reduce electric field concentration and accordingly, reduce crosstalk noise interference between the signal pairs.
  • Fig. 5 is a cross sectional view of a transmission unit 1 according to a fifth embodiment of the present invention.
  • the transmission unit 1 includes a first conductor group 11 having at least one first conductor 111 surrounded by a first sheath 1111 and at least one second conductor 112 surrounded by a second sheath 1121; a second conductor group 12 having at least one third conductor 121 surrounded by a first sheath 1111 and at least one fourth conductor 122 surrounded by a second sheath 1121; a third conductor group 13 having at least one fifth conductor 131 surrounded by a first sheath 1111 and at least one sixth conductor 132 surrounded by a second sheath 1121; and a third sheath 1113 surrounding all the first sheaths 1111 and second sheaths 1121.
  • the first, second and third conductor groups 11, 12, 13 are single-ended signal pairs. All the first sheaths 1111 have a dielectric coefficient higher than that of the second shea
  • the transmission unit 1 in the fifth embodiment may include differential signal pairs without earth conductors. There are differences between the dielectric values of the first, the second and the third sheath 1111, 1121, 1113. Since a high-dielectric material has good ability to concentrate electric field, the use of a low-dielectric material for one conductor in each of the signal pairs can reduce electric field concentration and accordingly, reduce crosstalk noise interference between the signal pairs.
  • Fig. 6 is a cross sectional view of a transmission unit 1 according to a sixth embodiment of the present invention.
  • the transmission unit 1 includes a first conductor group 11 having at least one first conductor 111 surrounded by a first sheath 1111 and at least one second conductor 112; and a second sheath 1121 surrounding the first sheath 1111 and the second conductor 112.
  • the first and the second conductor 111, 112 are axially arranged corresponding to one another.
  • Fig. 7 is a cross sectional view of a transmission unit 1 according to a seventh embodiment of the present invention.
  • the transmission unit 1 includes a first conductor group 11, a second conductor group 12, a first earth conductor 14, a second earth conductor 15, and a third earth conductor 16.
  • the first conductor group 11 includes at least one first conductor 111 and at least one second conductor 112, which are respectively surrounded by a first sheath 1111;
  • the second conductor group 12 includes at least one third conductor 121 and at least one fourth conductor 122, which are respectively surrounded by a first sheath 1111.
  • the first and the second conductor group 11, 12 are differential signal pairs.
  • the second earth conductor 15 is arranged between the first and the second conductor group 11, 12; the first earth conductor 14 is arranged to one side of the first conductor group 11 opposite to the second earth conductor 15; and the third earth conductor 16 is arranged to one side of the second conductor groups 12 opposite to the second earth conductor 15.
  • the first, second and third earth conductors 14, 15, 16 are respectively surrounded by a second sheath 1121.
  • the first sheaths 1111 have a dielectric coefficient higher than that of the second sheaths 1121.
  • the transmission unit 1 includes differential signal pairs and earth conductors. There is a difference between the dielectric values of the first sheaths 1111 and the second sheaths 1121. Since a high-dielectric material has good ability to concentrate electric field, the use of a low-dielectric material for one conductor in each of the signal pairs can reduce electric field concentration and accordingly, reduce crosstalk noise interference between the signal pairs.
  • Fig. 8 is a cross sectional view of a transmission unit 1 according to an eighth embodiment of the present invention.
  • the transmission unit 1 in the eighth embodiment is generally structurally similar to the seventh embodiment, except for a third sheath 1113 that surrounds all the first and second sheaths 1111, 1121.
  • the transmission unit 1 includes differential signal pairs and earth conductors. There are differences between the dielectric values of the first sheaths 1111, the second sheaths 1121, and the third sheaths 1113. Since a high-dielectric material has good ability to concentrate electric field, the use of a low-dielectric material for one conductor in each of the signal pairs can reduce electric field concentration and accordingly, reduce crosstalk noise interference between the signal pairs.
  • Fig. 9 is a cross sectional view of a transmission unit 1 according to a ninth embodiment of the present invention.
  • the transmission unit 1 in the ninth embodiment is generally structurally similar to the eighth embodiment, except that the first and the second conductor group 11, 12 are respectively surrounded by a fourth sheath 1114 before being further surrounded by the third sheath 1113 along with the first, second and third earth conductors 14, 15, 16.
  • the fourth sheath 1114 is aluminum foil in the ninth embodiment.
  • Fig. 10 is a perspective view of a transmission unit 1 according to a tenth embodiment of the present invention.
  • the transmission unit 1 in the tenth embodiment is generally structurally similar to the first embodiment, except that the at least one first conductor 111 and the at least one second conductor 112 are twisted together in axial direction to form the first conductor group.
  • the transmission units according to different embodiments of the present invention are measured with a network analyzer (NA) under predetermined conditions, so as to find the influence of different combinations of the dielectric coefficients of the first and the second sheath 1111, 1121 on the signal transmission over the transmission units 1.
  • NA network analyzer
  • each type of the tested transmission units 1 according to the seventh embodiment has a different combination of the dielectric coefficients of the first sheaths 1111 and second sheaths 1121.
  • Fig. 11 is a chart showing the result from an electromagnetic test conducted on a type "A" transmission unit 1 according to the seventh embodiment of the present invention, wherein the type "A" transmission unit 1 includes first and second sheaths 1111, 1121 both having a dielectric coefficient of 3.8.
  • Fig. 12 is a chart showing the result from an electromagnetic test conducted on a type "B" transmission unit 1 according to the seventh embodiment of the present invention, wherein the type "B" transmission unit 1 includes first sheaths 1111 having a dielectric coefficient of 3.2 and second sheath 1121 having a dielectric coefficient of 3.8.
  • Fig. 13 is a chart showing the result from an electromagnetic test conducted on a type "C" transmission unit 1 according to the seventh embodiment of the present invention, wherein the type "C" transmission unit 1 includes first sheaths 1111 having a dielectric coefficient of 3.8 and second sheath 1121 having a dielectric coefficient of 3.2.
  • Fig. 14 is a chart showing the result from an electromagnetic test conducted on a type "D" transmission unit 1 according to the seventh embodiment of the present invention, wherein the type "D" transmission unit 1 includes first and second sheaths 1111, 1121 both having a dielectric coefficient of 3.2.
  • the type "C" transmission unit according to the seventh embodiment of the present invention is proven in the electromagnetic test to show best data.
  • the transmission unit can have effectively reduced crosstalk signal.

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EP20110174312 2011-07-18 2011-07-18 Unité de transmission avec signal de diaphonie réduit Active EP2549490B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20110174312 EP2549490B1 (fr) 2011-07-18 2011-07-18 Unité de transmission avec signal de diaphonie réduit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20110174312 EP2549490B1 (fr) 2011-07-18 2011-07-18 Unité de transmission avec signal de diaphonie réduit

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EP2549490A1 true EP2549490A1 (fr) 2013-01-23
EP2549490B1 EP2549490B1 (fr) 2015-04-29

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105529066A (zh) * 2016-02-18 2016-04-27 常熟泓淋电线电缆有限公司 高弹性双支异形音响连接线

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4527135A (en) * 1983-06-20 1985-07-02 Woven Electronics Corp. Woven controlled balanced transmission line
DE3515724A1 (de) * 1985-05-02 1986-11-06 AEG KABEL AG, 4050 Mönchengladbach Elektrische flachbandleitung zur nachrichtenuebertragung

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202007017762U1 (de) * 2007-12-20 2008-04-10 Yes Way Enterprise Corporation Elektromagnetwellenschützendes Buskabel

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4527135A (en) * 1983-06-20 1985-07-02 Woven Electronics Corp. Woven controlled balanced transmission line
DE3515724A1 (de) * 1985-05-02 1986-11-06 AEG KABEL AG, 4050 Mönchengladbach Elektrische flachbandleitung zur nachrichtenuebertragung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105529066A (zh) * 2016-02-18 2016-04-27 常熟泓淋电线电缆有限公司 高弹性双支异形音响连接线

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