Cable Connector Shielding via Metal Inner Ring
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Solution Overview
Problem
Existing cable connector assemblies have poor anti-electromagnetic interference and high-frequency performance, limiting their ability to transmit signals above 8 Gb/s effectively.
Innovation Solution
A cable connector assembly is designed with a metallic shell, a metal braided layer, an inner shield layer, and a metal inner ring, where the metallic shell is electrically connected to the metal inner ring through a valgus portion, enhancing electromagnetic interference resistance and high-frequency signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional cable connector assembly with basic shielding is used, then the structure is simple and easy to manufacture, but the anti-electromagnetic interference performance is poor and high-frequency signal transmission above 8 Gb/s is not achievable
Solution Approach 1:
The shielding structure is segmented into multiple independent components: an inner shield layer, a metal braided layer, a metal inner ring, and a metallic shell. Each layer provides specific shielding functions and can be manufactured separately, then assembled together to form a complete electromagnetic interference protection system that achieves high-frequency performance above 8 Gb/s
Solution Approach 2:
The shielding components are nested within each other in a concentric arrangement: the inner shield layer is positioned at the core, surrounded by the metal braided layer, which is in turn surrounded by the metal inner ring, and finally enclosed by the metallic shell. This nested configuration creates multiple shielding barriers that work together to block electromagnetic interference while maintaining signal transmission capability for high-speed signals
2Reliability
If the metal braided layer is directly connected to the metallic shell without additional components, then the manufacturing process is simpler, but the electrical connection reliability and high-frequency performance are insufficient
Solution Approach 1:
The metal inner ring acts as an intermediary component between the metal braided layer and the metallic shell. It provides a dedicated electrical connection path that ensures reliable low-impedance bonding between these two shielding layers, which is critical for maintaining signal integrity at high frequencies above 8 Gb/s. The metal inner ring can be crimped or soldered to both components, creating a robust electrical connection
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables the transmission of high-speed signals up to 12 Gb/s or higher with improved anti-electromagnetic interference protection.
Implementation Method 1
a metallic shell disposed outside the plug and the cable... a metal inner ring sleeved between the metal braid layer and the outer cover layer, the metal inner ring being electrically connected to the metallic shell through the valgus portion
Data Source
AI summary
A cable connector assembly includes: an electrical connector including a plug, a metallic shell disposed outside the plug and the cable, and a middle shell; a cable electrically connected with the electrical connector, the cable including plural core wires, an inner shield layer covering the core wires, a metal braided layer covering outside the inner shield layer, and an outer cover layer covering outside the metal braided layer, the metal braided layer including a valgus portion; a case disposed outside the electrical connector and the cable; and a metal inner ring sleeved between the metal braid layer and the outer cover layer, the metal inner ring being electrically connected to the metallic shell through the valgus portion.