Graphite-Filled Heat Dissipation Sheet for Low-Frequency Antennas
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Solution Overview
Problem
Existing heat dissipation materials for low-frequency antennas suffer from reduced antenna performance due to high heat radiation characteristics, which lead to degradation of electromagnetic wave transmission and reception, and often result in cracks, shrinkage, and poor adhesion with the antenna.
Innovation Solution
A heat dissipation sheet with a matrix and graphite filler, where the graphite is surface-modified with an amino silane compound, is used to enhance thermal conductivity while maintaining compatibility with the antenna, minimizing material degradation and improving adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If heat radiation composite is applied to achieve high heat radiation performance, then heat dissipation capability is improved, but antenna performance deteriorates due to blocking electromagnetic waves
Solution Approach 1:
The patent applies local quality by creating a heat dissipation sheet with spatially varying properties: the first region (facing the antenna) uses a matrix material with low dielectric constant and low loss tangent to preserve electromagnetic wave transmission, while the second region (away from the antenna) uses high heat radiation performance material for effective heat dissipation. This regional differentiation resolves the contradiction by localizing the heat radiation function away from the antenna while maintaining electromagnetic transparency near the antenna.
Solution Approach 2:
The patent employs composite materials by combining two distinct material regions within a single heat dissipation sheet structure. The first region comprises a matrix material optimized for electromagnetic wave transmission, while the second region comprises material optimized for heat radiation. This composite structure allows the sheet to simultaneously achieve both electromagnetic wave transparency and high heat dissipation performance, resolving the technical contradiction between these two opposing requirements.
2Temperature
If heat radiation composite is applied to achieve high heat radiation performance, then heat dissipation capability is improved, but dielectric loss increases degrading electromagnetic wave transmission
Solution Approach 1:
The patent implements local quality by assigning different material properties to different regions: the first region near the antenna uses material with low dielectric loss to minimize electromagnetic wave attenuation, while the second region uses material with high heat radiation performance that may have higher dielectric loss. This spatial separation of material properties resolves the contradiction by isolating the high-loss material from the electromagnetic wave path.
Solution Approach 2:
The patent uses composite materials to create a heat dissipation sheet that combines a low-loss matrix material region with a high heat radiation performance material region. This composite structure enables the system to achieve high heat dissipation capability while maintaining low dielectric loss in the critical region where electromagnetic waves propagate, thereby resolving the contradiction between heat radiation performance and dielectric loss.
3Temperature
If heat dissipation sheet is designed with excellent heat radiation performance, then heat transfer capability is improved, but cracks and shrinkage occur reducing structural integrity
Solution Approach 1:
The patent applies local quality by designing the heat dissipation sheet with a first region containing a matrix material that provides structural support and a second region with high heat radiation performance material. The matrix material region acts as a structural framework that prevents cracks and shrinkage, while the heat radiation material region provides thermal management functionality. This regional differentiation resolves the contradiction between heat transfer capability and structural integrity.
Solution Approach 2:
The patent employs composite materials by combining a matrix material with high heat radiation performance material in a layered or regional configuration. The matrix material provides mechanical strength and structural stability, preventing defects such as cracks and shrinkage, while the heat radiation material provides excellent heat transfer capability. This composite structure resolves the technical contradiction by allowing each material to perform its primary function without compromising the other.
4Temperature
If heat dissipation sheet is designed with excellent heat radiation performance, then heat transfer capability is improved, but adhesion with antenna is poor reducing thermal contact
Solution Approach 1:
The patent implements local quality by designing the first region (in contact with the antenna) to have properties optimized for adhesion and electromagnetic wave transmission, while the second region (away from the antenna) has properties optimized for heat radiation. The matrix material in the first region provides good adhesion to the antenna surface, ensuring thermal contact, while the second region provides high heat dissipation capability. This regional differentiation resolves the contradiction between heat transfer capability and adhesion strength.
Solution Approach 2:
The patent uses composite materials to create a heat dissipation sheet where the matrix material region provides adhesion to the antenna surface, ensuring good thermal contact, while the high heat radiation performance material region provides excellent heat transfer capability. This composite structure allows the sheet to simultaneously achieve both strong adhesion and high heat transfer capability, resolving the technical contradiction between these two requirements.
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 heat dissipation sheet effectively transfers heat from the antenna without degrading its performance, reducing the occurrence of cracks and pores, and improving flexibility, thus maintaining efficient heat radiation and antenna function.
Implementation Method 1
a heat dissipation sheet for a low frequency antenna which is disposed on a low frequency antenna with an operating frequency of 50 kHz to 350 kHz. The heat dissipation sheet for a low frequency antenna includes a matrix and a heat dissipation filler dispersed in the matrix and including graphite
Implementation Method 2
the graphite may have a surface modified with an amino silane compound
Data Source
AI summary
Disclosed is a heat dissipation sheet for a low frequency antenna. The heat dissipation sheet according to an embodiment of the present invention is a heat dissipation sheet for a low frequency antenna having an operating frequency of 50 kHz to 350 kHz, and is implemented by including a matrix and a heat dissipation filler dispersed in the matrix and having graphite. According to this, the heat generated from the antenna can be quickly transferred to the outside without deterioration of the characteristics of the antenna operating in the low frequency band, so that it can be widely applied to various articles in the industry, such as electronic devices.