High-Permittivity Dielectric Layer for Thin Wave Absorbers
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Solution Overview
Problem
Conventional dielectric layers in reflective electromagnetic wave absorbers require increased thickness to achieve sufficient reflection attenuation, which hampers production efficiency and space utilization, especially for high-frequency applications like 5G and millimeter wave radars.
Innovation Solution
A resin composition with a relative permittivity higher than 10.0 at specific frequencies (3.7 GHz or 90 GHz) is used to form a dielectric layer, allowing for thinner layers that maintain effective absorption performance while prioritizing production efficiency and space savings, utilizing dielectric compounds like titanium oxide and barium titanate with adhesiveness for efficient attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the thickness of the dielectric layer is increased to achieve sufficient reflection attenuation, then the electromagnetic wave absorption performance is improved, but the production efficiency decreases and space utilization is reduced
Solution Approach 1:
The patent changes the material parameter (relative permittivity) of the dielectric layer from conventional values (1-10) to a higher value range (10-100). This parameter change allows the dielectric layer to achieve the same reflection attenuation performance with a significantly reduced thickness, thereby improving production efficiency and space utilization while maintaining reliable electromagnetic wave absorption performance
Solution Approach 2:
The patent employs composite materials consisting of a resin component and a dielectric compound (such as barium titanate, titanium oxide, or zinc oxide) to achieve high relative permittivity. This composite approach enables the dielectric layer to attain the desired electromagnetic wave absorption performance with thinner thickness, resolving the contradiction between reliability and productivity
2Reliability
If the thickness of the dielectric layer is increased to achieve sufficient reflection attenuation, then the electromagnetic wave absorption performance is improved, but the space utilization is reduced
Solution Approach 1:
By changing the relative permittivity parameter to a higher value range (10-100), the patent enables the dielectric layer to achieve sufficient reflection attenuation with a thickness of 1-100 μm instead of the conventional larger thickness, thereby significantly improving space utilization while maintaining reliable electromagnetic wave absorption performance
Solution Approach 2:
The composite material system (resin + dielectric compound) achieves high relative permittivity, allowing the dielectric layer to be extremely thin (1-100 μm) while still providing the necessary reflection attenuation performance, thus resolving the contradiction between reliability and space utilization
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 approach enables efficient manufacturing of dielectric layers with excellent reflection attenuation, improving productivity and space efficiency for electromagnetic wave absorbers in various frequency bands, including 5G and millimeter wave radars, by using a resin composition with high relative permittivity and adhesiveness.
Implementation Method 1
The resin composition contains at least one dielectric compound and a resin component, and has a relative permittivity higher than 10.0 at a frequency of 3.7 GHz or 90 GHz
Implementation Method 2
The dielectric layer is a layer for interfering with incident electromagnetic waves using reflected electromagnetic waves
Data Source
AI summary
A manufacturing method for manufacturing a dielectric layer included in a reflective electromagnetic wave absorber, the method including the steps of: preparing a resin composition containing at least one dielectric compound and a resin component, and having a relative permittivity higher than 10.0 at a frequency of 3.7 GHz or 90 GHz; and forming a dielectric layer made from this resin composition and having a thickness of 20 to 7000 μm. A resin composition according to the present disclosure is used to form a dielectric layer included in a reflective electromagnetic wave absorber, the resin composition containing at least one dielectric compound and a resin component, and having a relative permittivity higher than 10.0 at a frequency of 3.7 GHz or 90 GHz.