Finned Connector Module Cooling for High-Data-Rate Cable Assemblies
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Solution Overview
Problem
As data rates increase beyond 5 Gbps, copper-based cable assemblies face challenges with signal attenuation, leading to thermal management issues due to increased heat generation in active cable assemblies, which complicates the design of switches and servers, especially when using air-cooled systems, and there is resistance to adopting water-cooled systems for thermal load management.
Innovation Solution
A connector system with a module and receptacle design that incorporates a thermal surface with fins to enhance heat dissipation, minimizing thermal resistance by allowing air flow over and through the thermal surface, thereby reducing module temperature and improving reliability, and allowing for cooling with ambient air.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If active cable assemblies are used to achieve higher data rates beyond 5 Gbps, then data transmission capability is improved, but thermal load increases due to heat generation from active circuitry
Solution Approach 1:
The patent extends the thermal management solution from traditional planar heat sinks to a three-dimensional finned structure that protrudes from the connector body. This dimensional extension dramatically increases the surface area available for heat dissipation without increasing the footprint area, allowing active cable assemblies to operate at higher data rates while managing the increased thermal load effectively
Solution Approach 2:
The patent converts the harmful thermal energy generated by active cable circuitry into a manageable parameter by designing integrated fins that conduct this heat away from the connector body. The finned structure transforms the problem of heat generation into an opportunity for enhanced heat dissipation, allowing the system to tolerate higher power consumption and data rates
2Device complexity
If air-cooled systems are used for thermal management, then system complexity is reduced compared to water-cooled systems, but thermal dissipation capability is limited
Solution Approach 1:
The patent segments the cooling function into distributed fin structures integrated throughout the connector body rather than relying on a centralized cooling system. Each fin acts as an independent heat dissipation element, collectively providing substantial thermal management capability through simple air convection without requiring complex water cooling infrastructure
Solution Approach 2:
The finned connector structure performs self-cooling by passively conducting heat from active cable circuitry to the fin surfaces where it dissipates into ambient air through natural convection and radiation. This self-service thermal management eliminates the need for external active cooling systems, maintaining low device complexity while achieving effective heat dissipation
3Productivity
If the number of ports in switches and servers is increased to meet application requirements, then system performance is improved, but thermal management becomes increasingly difficult
Solution Approach 1:
The patent designs a universal finned connector structure that can be applied to all active cable connections regardless of port number or configuration. This multi-functional thermal management solution scales linearly with the number of ports, allowing switches and servers to increase port density without proportionally increasing thermal management complexity, as each connector independently manages its own heat dissipation
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 reduces thermal resistance and module temperature, enhancing reliability and enabling the use of ambient air for cooling, which is beneficial for handling higher data rates without the complexity of water-cooled systems.
Implementation Method 1
the thermal surface is configured to provide increased surface area so as to aid in the dissipation of thermal energy
Implementation Method 2
A thermal surface is provided on the first side and the thermal surface is configured to provide increased surface area so as to aid in the dissipation of thermal energy
Data Source
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AI summary
A module can be configured to mate with a receptacle. The module includes a body with a thermal surface that is coupled to thermally active circuitry supported by the body. The receptacle is configured to allow air to flow over the thermal surface so as to dissipate thermal energy from the circuitry.