TRANSMISSION UNIT WITH REDUCED CROSSTALK SIGNAL

• US 20130015922A1
• Filed: 07/14/2011
• Published: 01/17/2013
• Est. Priority Date: 07/14/2011
• Status: Active Grant

• Current Assignee: Yes Way Enterprise Corporation
• Original Assignee: Yes Way Enterprise Corporation
• Inventors: Liu, Da-Yu, Liu, Da-Yung, Liu, Teng-Lan, Jang, Ben-Hwa
• Granted Patent: US 8,917,148 B2
• Time in Patent Office: Days
• US Class Current: 333/12
• CPC Class Codes: H04B 3/28 Reducing interference caused by currents induced in cable sheathing or armouring

Abstract

A transmission unit with reduced crosstalk signal includes a first conductor group having 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, so that a difference in dielectric property exists between the first and the second conductor to enable reduction of crosstalk occurred during high-speed signal transmission over the transmission unit.

Claims

1. A transmission unit with reduced crosstalk signal, comprising a first conductor group;

the first conductor group including at least one first conductor surrounded by a first sheath and at least one second conductor surrounded by a second sheath;

the first and second conductors being axially arranged corresponding to one another; and

the first sheath having a dielectric coefficient higher than that of the second sheath.

2. The transmission unit as claimed in claim 1, further comprising a second conductor group and a third conductor group;

the second conductor group including at least one third conductor surrounded by a first sheath and at least one fourth conductor surrounded by a second sheath, and the third conductor group including at least one fifth conductor surrounded by a first sheath and at least one sixth conductor surrounded by a second sheath.

3. The transmission unit as claimed in claim 1, further comprising a second conductor group and a third conductor group;

the second conductor group including at least one third conductor surrounded by a first sheath and at least one fourth conductor, and the third conductor group including at least one fifth conductor surrounded by a first sheath and at least one sixth conductor; and

the second sheath surrounding the second conductor also surrounding all the first sheaths, the fourth conductor and the sixth conductor.

4. The transmission unit as claimed in claim 1, further comprising a second conductor group, a first earth conductor, a second earth conductor, a third earth conductor, and a third sheath;

the second conductor group including at least one third conductor surrounded by a first sheath and at least one fourth conductor surrounded by a second sheath;

the first and second conductor groups being differential signal pairs;

the second earth conductor being arranged between the first and the second conductor groups, the first earth conductor being arranged to one side of the first conductor group opposite to the second earth conductor, and the third earth conductor being arranged to one side of the second conductor group opposite to the second earth conductor;

the third sheath surrounding the first and the sheaths as well as the first, second and third earth conductors; and

the first sheaths having a dielectric coefficient higher than that of the second sheaths.

5. The transmission unit as claimed in claim 1, further comprising a second conductor group and a third conductor group;

the second conductor group including at least one third conductor and at least one fourth conductor respectively surrounded by a first sheath, and the third conductor group including at least one fifth conductor and at least one sixth conductor respectively surrounded by a first sheath;

the second and the third conductor group being single-ended signal pairs;

the second sheath surrounding the second conductor also surrounding all the first sheaths; and

the first sheaths having a dielectric coefficient higher than that of the second sheath.

6. The transmission unit as claimed in claim 1, further comprising a second conductor group, a first earth conductor, a second earth conductor, and a third earth conductor;

the first and second conductors included in the first conductor group being respectively surrounded by a first sheath;

the second conductor group including at least one third conductor and at least one fourth conductor respectively surrounded by a first sheath;

the first and second conductor groups being differential signal pairs;

the second earth conductor being arranged between the first and the second conductor groups, the first earth conductor being arranged to one side of the first conductor group opposite to the second earth conductor, and the third earth conductor being arranged to one side of the second conductor group opposite to the second earth conductor;

the first, second and third earth conductors being respectively surrounded by a second sheath; and

the first sheaths having a dielectric coefficient higher than that of the second sheaths.

7. The transmission unit as claimed in claim 1, wherein the first and the second conductor are parallelly arranged side by side.

8. The transmission unit as claimed in claim 1, wherein the first and the second conductor are axially twisted together.

9. The transmission unit as claimed in claim 6, further comprising a third sheath.

10. The transmission unit as claimed in claim 9, further comprising a fourth sheath surrounding each of the first and the second conductor group to locate outside the first sheaths;

and the fourth sheath being aluminum foil.

11. A transmission unit with reduced crosstalk signal, comprising:

a first conductor group including at least one first conductor surrounded by a first sheath and at least one second conductor; and

the first and second conductor being axially arranged corresponding to one another; and

a second sheath surrounding the first sheath and the second conductor.