Cable Assembly Ground Wire Mesh for Connector EMI Shielding
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Solution Overview
Problem
Electromagnetic interference (EMI) noise occurs at the connection point between cables and connectors in electronic devices, leading to issues such as signal reflection and impedance mismatch.
Innovation Solution
A cable assembly design featuring a shielding member with branching ground wires that cross between conductors, forming a net or mesh structure to reduce EMI noise without additional shielding components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If ground wires are arranged in a conventional manner without crossing between conductors, then the cable structure is simple, but EMI noise occurs at the connection point between cable and connector
Solution Approach 1:
The ground wires are segmented to cross between individual conductors rather than running parallel, creating multiple shielding zones that effectively block EMI noise at the connector interface without requiring additional shielding components
Solution Approach 2:
The ground wires serve dual functions: providing electrical grounding and creating EMI shielding by crossing between conductors. This merges the grounding function with the shielding function, eliminating the need for separate shielding structures
2Object-affected harmful factors
If additional shielding components are added to reduce EMI noise, then EMI shielding performance improves, but device complexity and assembly difficulty increase
Solution Approach 1:
The existing ground wires are designed to perform multiple functions: electrical grounding, EMI shielding, and structural support. This multi-functionality eliminates the need for additional dedicated shielding components while maintaining effective EMI protection
Solution Approach 2:
The ground wires themselves provide the shielding function through their crossing arrangement, making the system self-shielding without requiring external or additional shielding components. The existing structural elements serve the dual purpose of support and EMI protection
3Reliability
If ground wires cross between conductors in the connecting member, then impedance matching and EMI shielding are improved, but manufacturing precision requirements increase
Solution Approach 1:
The ground wires cross between conductors only in the specific local region of the connecting member where EMI shielding is most critical, rather than throughout the entire cable length. This localized approach maintains impedance matching where needed without requiring high precision throughout the entire assembly
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 design effectively attenuates EMI noise by ensuring impedance matching and shielding, simplifying assembly by integrating existing ground wires into the connection structure.
Implementation Method 1
a cable assembly having a structure for filtering electromagnetic interference (EMI) noise generated at a portion where a cable and a connector are connected
Implementation Method 2
The cable may have an electromagnetic wave shielding structure that surrounds the conductor to shield against electromagnetic waves
Data Source
AI summary
A cable assembly including a cable including a plurality of conductors, and a shielding member to shield the plurality of conductors, and including a plurality of ground wires connectable to a ground electrode; and a connector including a connecting member through which an end of the cable passes, wherein the cable is configured so that ground wires of the plurality of ground wires in an end area of the cable in the connecting member cross between conductors of the plurality of conductors.