Metallized Plastic Layer for Antenna Composite Reflectivity
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Solution Overview
Problem
Antennas with composite reflective surfaces face significant reflectivity losses at high frequencies due to ohmic losses, particularly with carbon fiber composites, and existing metallization methods like vacuum deposition are costly, complex, and prone to damage, limiting their industrial application.
Innovation Solution
Embedding a layer of metallized dielectric plastic between or on the surface of composite layers during lamination, allowing for continuous or discontinuous metallization patterns that improve reflectivity by bonding the metallized layer with the resin, reducing the need for complex installations and enhancing adhesion and protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If vacuum deposition method is used for metallization, then reflectivity is improved, but device complexity and manufacturing cost increase significantly
Solution Approach 1:
The patent replaces expensive vacuum deposition installations with simple spray painting equipment. The metallization is applied as a disposable coating layer that can be easily reapplied if damaged, eliminating the need for complex industrial vacuum deposition systems while maintaining acceptable reflectivity performance
Solution Approach 2:
The patent substitutes the complex mechanical vacuum deposition system with a simple spray painting mechanism. The spray gun delivers metallization particles through atmospheric pressure and simple fluid dynamics rather than requiring vacuum chambers and sophisticated deposition controls
2Reliability
If vacuum deposition method is used for metallization, then reflectivity is improved, but manufacturing cost increases
Solution Approach 1:
The patent uses inexpensive spray painting equipment and consumable metallization materials instead of costly vacuum deposition installations. The simple spray cans or guns and basic metallization powders or paints dramatically reduce manufacturing costs while achieving sufficient reflectivity for the application
Solution Approach 2:
The patent creates a simplified copy of the vacuum deposition process using spray painting technology. Rather than implementing the full complex vacuum deposition system, it replicates the essential function of depositing a metallization layer through a much simpler atmospheric spray process
3Strength
If carbon fiber composite is used for reflective surface, then structural strength is improved, but reflectivity deteriorates at high frequencies due to ohmic losses
Solution Approach 1:
The patent creates a composite structure combining carbon fiber composite substrate with a metallization coating layer. The carbon fiber provides structural strength while the metallization layer compensates for the ohmic losses at high frequencies, achieving both mechanical integrity and electromagnetic performance
Solution Approach 2:
The patent applies metallization specifically to the reflective surface areas where electromagnetic performance is critical, rather than metallizing the entire structure. This localized approach addresses the reflectivity issue at high frequencies while maintaining the structural advantages of carbon fiber in non-critical areas
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 process enhances reflectivity, reduces manufacturing costs and complexity, and improves the durability and homogeneity of the metallization layer, enabling better control over electromagnetic field behavior and radiation patterns without the need for expensive equipment.
Implementation Method 1
the ability of reflective surfaces to reflect the incident radiation thereon
Implementation Method 2
bonding the metallized layer with the resin
Data Source
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Figure 5
AI summary
The invention relates to a process for improving the reflectivity of reflective surfaces (1) of antennas, said reflective surfaces (1) being made of a composite, comprising at least one layer of composite (2), characterized in that it comprises the following steps: a) laminating a layer of plastic (3) comprising a metallization layer (4) on the at least one layer of composite (2), bonding the metallization layer (4) to the substrate of the layer of composite (2) in its preimpregnated state by means of the resin itself of the composite; b) cutting the assembly of the layer of composite (2) and the layer of plastic (3) comprising a metallization layer (4); c) forming strips or patterns with a determined shape from the assembly formed by the layer of composite (2) and the layer of plastic (3) comprising a metallization layer (4) of step b); d) laminating the strips or patterns of step c) as a first layer on a molding jig; e) preparing the vacuum and curing bag; f) introducing in the autoclave; g) performing the curing cycle, in which the resin of the composite, upon polymerizing, bonds the layer of plastic (3) comprising the metallization layer (4) to the rest of the substrate of the layer of composite (2).