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Electrical cable

a technology of electric cables and cables, applied in the direction of cables, flat/ribbon cables, insulated conductors, etc., can solve problems such as electrical skew, and achieve the effect of reducing the effective dielectric constan

Active Publication Date: 2020-04-16
TYCO ELECTRONICS LOGISTICS AG (CH)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent describes different electrical cables that have a conductor assembly with two insulators and a cable shield. The insulators have different dielectric constants, and the cable shield has a void. This results in improved signal quality and reduced interference between differential signals. The cable shield helps to prevent damage to the cables during installation and also enhances protection against environmental factors.

Problems solved by technology

However, where the cable shield overlaps itself, a void is created that is filled with air, which has a different dielectric constant than the material of the insulator and shifts the cable shield farther from the signal conductor.
The void affects the electrical performance of the conductors in the electrical cable by changing the dielectric constant of the material near one of the conductors compared to the other of the conductors within the differential pair, leading to electrical skew.

Method used

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Effect test

Embodiment Construction

[0011]FIG. 1 is a perspective view of a portion of an electrical cable 100 formed in accordance with an embodiment. The electrical cable 100 may be used for high speed data transmission between two electrical devices, such as electrical switches, routers, and / or host bus adapters. For example, the electrical cable 100 may be configured to transmit data signals at speeds of at least 10 gigabits per second (Gbps), which is required by numerous signaling standards, such as the enhanced small form-factor pluggable (SFP+) standard. For example, the electrical cable 100 may be used to provide a signal path between high speed connectors that transmit data signals at high speeds.

[0012]The electrical cable 100 includes a conductor assembly 102. The conductor assembly 102 is held within an outer jacket 104 of the electrical cable 100. The outer jacket 104 surrounds the conductor assembly 102 along a length of the conductor assembly 102. In FIG. 1, the conductor assembly 102 is shown protrudin...

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Abstract

An electrical cable includes a conductor assembly having a first conductor, a second conductor, a first insulator surrounding the first conductor and a second insulator surrounding the second conductor. The first insulator has a first thickness between the first conductor and an outer surface. The second insulator has a second thickness between the second conductor and an outer surface. The first thickness is greater than the second thickness. A cable shield is wrapped around the conductor assembly and engages the outer surface of the first insulator along a first segment and engaging the outer surface of the second insulator along a second segment. The cable shield has an inner edge and a flap covering the inner edge. The cable shield forms a void at the inner edge located closer to the first conductor than the second conductor.

Description

BACKGROUND OF THE INVENTION[0001]The subject matter herein relates generally to electrical cables that provide shielding around signal conductors.[0002]Shielded electrical cables are used in high-speed data transmission applications in which electromagnetic interference (EMI) and / or radio frequency interference (RFI) are concerns. Electrical signals routed through shielded cables may radiate less EMI / RFI emissions to the external environment than electrical signals routed through non-shielded cables. In addition, the electrical signals being transmitted through the shielded cables may be better protected against interference from environmental sources of EMI / RFI than signals through non-shielded cables.[0003]Shielded electrical cables are typically provided with a cable shield formed by a tape wrapped around the conductor assembly. Signal conductors are typically arranged in pairs conveying differential signals. The signal conductors are surrounded by an insulator and the cable shie...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H01B11/10H01B7/08H01B7/18H05K9/00
CPCH01B7/18H05K9/0088H01B11/1016H01B7/0823H01B11/002H01B7/02H01B11/06H01B11/1834
Inventor HORNUNG, CRAIG WARRENSHANBHAG, MEGHAMORGAN, CHAD WILLIAM
Owner TYCO ELECTRONICS LOGISTICS AG (CH)