Coaxial Cable Grounding Clip for Crosstalk Suppression
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Solution Overview
Problem
Information handling systems face challenges in managing crosstalk between coaxial cables and electromagnetic interference (EMI) due to the proximity of antennas and increased thermal energy generated by 5G radios, which disrupts signal strength and processing power.
Innovation Solution
The implementation of cable clips with conductive materials interfaced with system ground to route coaxial cables and reduce crosstalk, combined with a graphene-coated EMI shield to manage thermal energy and EMI leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If coaxial cables for multiple radios are routed in close proximity to reduce housing footprint, then device compactness is improved, but crosstalk between cables increases disrupting signal strength
Solution Approach 1:
A ground sheath is introduced as an intermediary element between the coaxial cables. The ground sheath acts as a mediator that isolates the cables from each other while allowing them to be routed in close proximity, thereby enabling compact housing while reducing crosstalk interference between the cables
Solution Approach 2:
The ground sheath is extracted and separated from the traditional cable structure, positioned between the signal-bearing coaxial cables. This extraction allows the ground sheath to independently perform its shielding function without interfering with the signal transmission, enabling close cable routing while maintaining signal integrity
2Productivity
If 5G radio operates at peak power to achieve high data rates, then communication performance is improved, but thermal energy generation increases constraining processing power
Solution Approach 1:
The ground sheath, which naturally provides EMI shielding, is utilized to convert the harmful thermal energy generated by the 5G radio into a beneficial cooling mechanism. The ground sheath acts as a thermal pathway that conducts heat away from the radio component, allowing the radio to operate at peak power while managing the thermal load that would otherwise constrain processing power
3Object-affected harmful factors
If EMI shield is added around radio to reduce interference, then signal isolation is improved, but thermal energy retention increases
Solution Approach 1:
The ground sheath is designed with differentiated local qualities: it provides EMI shielding in the frequency range of interest while simultaneously providing thermal conduction pathways. This local quality differentiation allows the same structure to perform both electromagnetic isolation and thermal management functions, preventing thermal energy retention while maintaining signal isolation
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
This solution allows for more compact component placement, improved radio transmission and reception performance, and effective thermal management, reducing CPU operating temperature and EMI levels.
Implementation Method 1
A cable clip interfaced with system ground routes coaxial cables of different radios and different transmission frequencies by exposing a ground sheath of the coaxial cables at the cable clip to reduce coaxial cable surface current
Implementation Method 2
A graphene paint applied to the shield helps to dissipate excess thermal energy from within the enclosure defined by the frame and shield over the radio
Data Source
AI summary
An information handling system supports multi-radio and multi-antenna wireless communication by routing coaxial cables between the radios and antennas through a cable clip of a conductive material coupled to system ground and interfaced with the coaxial cable ground sheath through an opening formed in the coaxial cable outer casing. A current source of the radio frequency applies a current in phase with the radio signal to the coaxial cable outer casing to suppress crosstalk with coaxial cables of different frequencies.