MIMO Antenna Thermal Management via Direct Contact Heat Dissipation
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Solution Overview
Problem
Conventional MIMO antenna systems face inefficiencies in heat dissipation due to contact thermal resistance generated by thermal pads, which also introduce assembling tolerance and height deviations, leading to increased weight and size, and saturation of temperature reduction despite increased heat-dissipation fin height.
Innovation Solution
The MIMO antenna apparatus directly contacts a heat-dissipation part to the heat-generation elements using a second heat-dissipation part with vertical and horizontal fins, a heat distribution bridge, and a tolerance absorption ring, reducing contact thermal resistance and eliminating assembling tolerance and height deviations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a thermal pad is used to mediate between the heat-generation element and the heat-dissipation body, then assembling tolerance and height deviation are eliminated, but contact thermal resistance increases and heat-dissipation performance deteriorates
Solution Approach 1:
The invention removes the thermal pad from the heat dissipation path, extracting the source of contact thermal resistance. The heat-dissipation body is designed to directly contact the heat-generation element through a through-hole structure, eliminating the intermediate thermal pad layer that causes energy loss while still accommodating assembling tolerance through the mechanical design of the direct contact interface.
Solution Approach 2:
The heat-dissipation body is segmented into multiple heat-dissipation fins that extend from the main body. This segmentation increases the surface area for heat dissipation and allows the structure to accommodate tolerance variations while maintaining effective thermal contact. The fins are arranged to maximize heat transfer efficiency without requiring a thermal pad.
2Adaptability or versatility
If the thickness of the thermal pad is increased to eliminate assembling tolerance and height deviation, then universality is improved, but contact thermal resistance increases and heat-dissipation performance further deteriorates
Solution Approach 1:
The heat-dissipation body incorporates a flexible or adjustable mechanism that allows it to adapt to varying heights and tolerances dynamically. The structure can deform or adjust its position to maintain optimal thermal contact with the heat-generation element, providing universality without requiring increased thermal pad thickness that would worsen thermal resistance.
3Temperature
If the height of the heat-dissipation fin is increased to improve heat-dissipation performance, then temperature reduction is enhanced, but weight and size of the product increase
Solution Approach 1:
The heat-dissipation fins are designed with varying local qualities - different heights, thicknesses, and spacing in different regions. Areas with higher heat generation receive taller or denser fins for enhanced cooling, while areas with lower heat generation use shorter or sparser fins. This localized optimization achieves effective temperature control without uniformly increasing the weight and size of the entire heat-dissipation structure.
4Productivity
If the height of the heat-dissipation fin is increased to improve heat-dissipation performance, then heat-dissipation efficiency is enhanced, but product size increases
Solution Approach 1:
The heat-dissipation structure transitions from a single-dimensional vertical fin design to a multi-dimensional configuration. Heat-dissipation fins are arranged in multiple directions and layers, creating a three-dimensional heat dissipation network. This dimensional expansion increases heat-dissipation efficiency by providing multiple heat transfer paths without requiring a proportional increase in the overall product size, as heat is dissipated across multiple spatial dimensions simultaneously.
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 configuration enhances heat-dissipation performance, reduces signal distortion, and increases the lifespan of the apparatus while minimizing weight and size, achieving better universality and communication performance.
Implementation Method 1
a second heat-dissipation part detachably coupled to the through hole to contact one surface of the heat-generation element to receive heat from the heat-generation element
Implementation Method 2
having a plurality of vertical heat-dissipation fins formed to be extended in a direction perpendicular to the outside surface thereof
Implementation Method 3
dissipate heat at a long distance father than the first heat-dissipation part
Data Source
AI summary
The present disclosure relates to an MIMO antenna apparatus, and in particular, includes a PCB having at least one heat-generation element provided on one surface thereof, a first heat-dissipation part disposed to cover one surface of the PCB, having a through hole formed in a portion corresponding to the position provided with the heat-generation element, and having a plurality of vertical heat-dissipation fins formed to be extended in a direction perpendicular to the outside surface thereof, and a second heat-dissipation part detachably coupled to the through hole to contact one surface of the heat-generation element to receive heat from the heat-generation element and to dissipate heat at a long distance father than the first heat-dissipation part, thereby enhancing heat-dissipation performance and expanding universality of a product.