Reflection Panel With Intermediate Layers For Efficiency
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Solution Overview
Problem
Electromagnetic wave reflecting devices with conductive patterns or solid films experience surface changes, scratches, or aging deterioration when installed indoors or outdoors for extended periods, leading to reduced reflection efficiency and deviation from the designed direction.
Innovation Solution
The electromagnetic wave reflecting device incorporates a reflection panel with a dielectric layer, a periodic conductive pattern, a ground layer, and intermediate layers bonded to dielectric substrates, which helps maintain the surface integrity and reflection efficiency by controlling the area occupancy of the conductive pattern and ensuring high transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a metal pattern or ground layer is provided on a reflection panel to achieve electromagnetic wave reflection, then the reflection efficiency is improved, but chemical reactions such as rust occur due to oxygen or moisture, causing deterioration of the reflective surface
Solution Approach 1:
A protective layer is introduced as an intermediary between the metal pattern/ground layer and the external environment. This protective layer prevents direct contact between the metal and harmful factors such as oxygen and moisture, thereby preventing chemical reactions while maintaining the electromagnetic wave reflection function.
Solution Approach 2:
The reflection panel is constructed as a composite structure combining metal patterns or ground layers with protective materials. This composite design allows the metal components to provide electromagnetic wave reflection while the protective materials prevent chemical deterioration from environmental exposure.
2Quantity of substance
If the occupancy of conductive pattern is reduced to maintain transmittance, then the transparency or transmittance of the reflection panel is improved, but the electric field becomes concentrated on dielectrics around the conductive pattern, deteriorating reflection efficiency
Solution Approach 1:
The invention optimizes parameters such as the occupancy ratio of the conductive pattern, the thickness and material properties of the protective layer, and the dielectric constant of surrounding materials. By carefully adjusting these parameters, the design achieves a balance where sufficient transmittance is maintained while preventing electric field concentration that would reduce reflection efficiency.
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 effectively suppresses the deterioration of reflection efficiency, maintaining it at 60% or more even after exposure to harsh environments for extended periods, while ensuring a certain level of transmittance.
Implementation Method 1
a periodic conductive pattern provided on one surface of the dielectric layer; a ground layer provided on the other surface of the dielectric layer
Implementation Method 2
a first intermediate layer covering the conductive pattern; a first dielectric substrate bonded to the conductive pattern by the first intermediate layer; a second intermediate layer covering the ground layer; and a second dielectric substrate bonded to the ground layer by the second intermediate layer
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
Deterioration of reflection efficiency of an electromagnetic wave reflecting device installed indoors and outdoors is suppressed. An electromagnetic wave reflecting device includes a reflection panel configured to reflect radio waves in a desired band selected from a band of frequencies equal to or higher than 1 GHz and equal to or lower than 170 GHz, and a frame that holds the reflection panel. The reflection panel includes: a dielectric layer; a periodic conductive pattern provided on one surface of the dielectric layer; a ground layer provided on the other surface of the dielectric layer; a first intermediate layer covering the conductive pattern; a first dielectric substrate bonded to the conductive pattern by the first intermediate layer; a second intermediate layer covering the ground layer; and a second dielectric substrate bonded to the ground layer by the second intermediate layer.