Raised Heat Sink Pathways for Antenna Cable Noise Isolation
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Solution Overview
Problem
Electronic devices face challenges in minimizing electromagnetic interference (EMI) impact on wireless antenna cables, which degrades wireless performance due to noise from noisy components on the circuit board, and heat dissipation becomes increasingly difficult as devices shrink.
Innovation Solution
The use of heat sinks with raised pathways that route antenna cables between the heat sink and the housing, isolating them from noisy components while maintaining effective thermal transfer, and mounting wireless antennas within the housing to reduce noise interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If antenna cables are routed on the circuit board near noisy components, then device complexity is reduced, but wireless performance degrades due to noise coupling
Solution Approach 1:
The patent introduces a heat sink as an intermediary structure that simultaneously serves as a thermal management component and a noise shielding barrier. The heat sink is positioned between the noisy components and the antenna cables, acting as a mediator that blocks electromagnetic interference while allowing heat dissipation. This resolves the contradiction by providing a path for cable routing that is isolated from noise sources without requiring separate shielding structures.
2Reliability
If shielding is added around noisy components to protect antenna cables, then wireless performance is improved, but device complexity and space requirements increase
Solution Approach 1:
The heat sink is designed to perform multiple functions simultaneously: thermal management (heat dissipation) and electromagnetic interference shielding. By making the heat sink multi-functional, the patent eliminates the need for separate shielding structures around noisy components or antenna cables. The same component that cools the processor also acts as a Faraday cage, blocking noise from coupling to the antenna cables, thus improving wireless performance without increasing device complexity.
Solution Approach 2:
The patent merges the thermal management function and the EMI shielding function into a single integrated structure. Instead of having separate heat sink and shielding components, the design combines these functions so that the heat sink itself provides the shielding effect. This merging reduces the overall number of components and simplifies the device structure while maintaining both thermal performance and wireless performance.
3Volume of moving object
If device size is reduced, then portability is improved, but heat dissipation capability deteriorates
Solution Approach 1:
The patent applies local quality by creating raised pathways with different geometries in different locations of the heat sink. The pathways have varying cross-sectional areas and depths depending on the local thermal requirements and noise shielding needs. This allows the heat sink to optimize heat dissipation in specific areas while maintaining compact overall dimensions, resolving the contradiction between small size and effective heat dissipation.
4Reliability
If raised pathways are added to the heat sink for cable routing, then noise isolation is improved, but manufacturing complexity increases
Solution Approach 1:
The patent uses parameter changes by varying the depth and cross-sectional area of the raised pathways based on location. Rather than using uniform pathways throughout, the design adjusts the pathway parameters (depth, width, shape) to match the local requirements for noise isolation and heat dissipation. This allows effective noise isolation in areas where cables are routed while maintaining simpler structures in areas where shielding is less critical, thus balancing manufacturing ease with performance.
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 effectively reduces the impact of board noise on antenna cables, enhances receiver performance, and ensures efficient heat dissipation, addressing both noise isolation and thermal management in compact electronic devices.
Implementation Method 1
a heat sink. The heat sink has a main surface adapted to be secured in close proximity to an inner surface of at least one side of the housing
Implementation Method 2
The main surface includes one or more raised pathways that form one or more tunnels between the heat sink and the inner surface of the at least one side of the housing
Data Source
AI summary
Wireless electronic devices include one or more wireless antennas to provide for wireless communications. The antenna cables are routed internally within the device and typically noise from components located on a circuit board may couple to the antenna cables and cause a degradation in wireless performance, impact antenna sensitivity and cause packet loss. Utilizing raised pathways in a heat sink utilized for thermal transfer of heat to a housing enables tunnels to be formed between the housing and the heat sink. Routing the antenna cables through the tunnels improves noise isolation for the antenna cables while still maintaining the heat transfer. The raised pathways are configured to not interfere with components on the circuit board or components included in the housing. The wireless antennas may be mounted within the housing instead of on the board so no portion of the antenna cables are located on the circuit board.