Plasma-Discharge Composite Structure for Lightweight Radar Absorption
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Solution Overview
Problem
Conventional radar-absorbing structures (RAS) face challenges in achieving a balance between improved radar-absorbing ability and mechanical properties, particularly due to the increased viscosity and irregular dispersion of nano particles in the matrix material.
Innovation Solution
The proposed radar-absorbing fiber-reinforced structure incorporates a fiber composite discharging part with a first and second electrode part separated by a dielectric layer, capable of generating plasma when a voltage difference is applied. This structure includes conductive fibers with high tensile strength, a radar-entering part, and a spacing structure with a discharging space to enhance plasma density and control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If nano particles are dispersed in the matrix with a large weight percent to increase radar-absorbing ability, then the radar-absorbing ability is improved, but the viscosity of the matrix is increased and dispersion irregularity occurs
Solution Approach 1:
The patent changes the physical state of the radar-absorbing material from solid nano particles to plasma state, enabling control of radar-absorbing properties through plasma parameters (density, temperature, composition) rather than particle concentration, thus avoiding viscosity issues while maintaining high radar-absorbing ability
Solution Approach 2:
The patent replaces the mechanical mixing and dispersion process of nano particles with a plasma generation process using electromagnetic fields, eliminating the need for mechanical dispersion and associated viscosity problems
2Reliability
If conventional RAM is coated on the surface to absorb radar, then the radar-absorbing ability is improved, but the weight of the weapon system is increased
Solution Approach 1:
The patent replaces physical RAM coating layers with a plasma-based electromagnetic field control system, eliminating the need for heavy material coatings and reducing system weight while maintaining radar-absorbing capability
Solution Approach 2:
The patent transitions from using material quantity (coating thickness and composition) to using field parameters (plasma density, temperature, and electromagnetic field characteristics) to achieve radar absorption, thereby eliminating weight penalties
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 use of plasma in the radar-absorbing fiber-reinforced structure significantly improves the radar-absorbing ability while maintaining mechanical properties suitable for aircraft applications. The spacing structure increases plasma density and facilitates control, and the radar-entering part enhances absorption and reduces light perception.
Implementation Method 1
The fiber composite discharging part is configured to discharge plasma in response to a voltage difference thereby changing a reflected wave or transmitted wave of a radar incident on the radar-absorbing fiber-reinforced structure
Data Source
AI summary
A radar-absorbing fiber-reinforced structure includes a fiber composite discharging part. The fiber composite discharging part includes a first electrode part and a second electrode part, which are spaced apart from each other by a dielectric layer and receive different voltages. The fiber composite discharging part is configured to discharge plasma in response to a voltage difference thereby changing a reflected wave or transmitted wave of a radar incident on the radar-absorbing fiber-reinforced structure to reduce reflectivity of the radar. At least one of the first electrode part and the second electrode part include a conductive fiber having a tensile strength equal to or more than 0.5 GPa.