Thermoplastic Radar Cover Resin Composition
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Solution Overview
Problem
Radar covers cause significant electromagnetic wave loss due to reflection, necessitating a material that balances electromagnetic reflection loss and penetration loss while maintaining mechanical properties to prevent signal inhibition.
Innovation Solution
A thermoplastic resin composition incorporating optimal amounts of carbon nanotubes and carbon black, mixed at a specific weight ratio with a polyamide resin, which enhances mechanical strength and controls electromagnetic losses to prevent signal inhibition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a radar cover is mounted to protect the radar from the surrounding environment and moisture, then the radar protection is improved, but electromagnetic wave loss due to reflection increases
Solution Approach 1:
The patent uses a composite material consisting of polyamide resin combined with specific amounts of carbon nanotubes (0.1-5 wt%) and carbon black (0.1-10 wt%). This composite structure provides both protective function and controlled electromagnetic wave interaction, resolving the contradiction between protection and signal transmission.
Solution Approach 2:
The patent optimizes the concentrations of carbon nanotubes and carbon black within specific ranges to achieve the desired balance between reflection loss and penetration loss. By precisely controlling these material parameters, the cover provides protection while maintaining radar signal transmission.
2Loss of energy
If an electromagnetic wave shielding material with high penetration loss is used to reduce reflection loss, then electromagnetic wave shielding is improved, but radar signal transmission is inhibited
Solution Approach 1:
The patent establishes specific concentration ranges for carbon nanotubes (0.1-5 wt%) and carbon black (0.1-10 wt%) to optimize the balance between reflection loss reduction and signal transmission. This precise parameter control ensures the cover provides electromagnetic wave management without inhibiting radar signals.
Solution Approach 2:
The combination of carbon nanotubes and carbon black in a polyamide resin creates a composite material with balanced electromagnetic properties. The synergistic effect of these two additives provides both reflection loss reduction and acceptable penetration loss for radar signal transmission.
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 composition achieves a balanced electromagnetic reflection and penetration loss, ensuring radar signal transmission is not inhibited while providing excellent mechanical properties for the radar cover.
Implementation Method 1
a material capable of effectively reducing the intensity of electromagnetic waves by absorbing energy of the incident electromagnetic waves and converting their energy into heat using conduction, dielectric, and magnetic loss
Implementation Method 2
a material capable of effectively reducing the intensity of electromagnetic waves by absorbing energy of the incident electromagnetic waves and converting their energy into heat using conduction, dielectric, and magnetic loss
Implementation Method 3
a material capable of effectively reducing the intensity of electromagnetic waves by absorbing energy of the incident electromagnetic waves and converting their energy into heat using conduction, dielectric, and magnetic loss
Implementation Method 4
electromagnetic reflection loss on the surface of the radar cover may be very high
Data Source
AI summary
Provided is a thermoplastic resin composition for a radar cover which exhibits excellent mechanical properties as well as a good balance between electromagnetic reflection loss and electromagnetic penetration loss, which is required for a radar protection, by including 85 wt% to 95 wt% of a thermoplastic resin, 1 wt% to 5 wt% of carbon nanotubes, and 3 wt% to 10 wt% of carbon black, wherein a weight ratio of the carbon nanotubes to the carbon black is in a range of 3:7 to 1:7.