PVD-Coated Radome Structure for Metallic Finish and Radar Transparency
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Solution Overview
Problem
Current methods for creating decorative radomes with metallic appearances that are radar-compatible and transparent to radio waves are complex, costly, and prone to production issues, such as surface scratching and radio wave attenuation, while also lacking the ability to seamlessly integrate satin and gloss finishes with patterned designs and backlighting capabilities.
Innovation Solution
A decorative radome design featuring a radio-transmissive substrate with a decorative coating comprising metal or metal alloys, applied using physical vapor deposition (PVD), and overmolded with a radio-transmissive polymer, which provides a form-fit connection and reduces the need for adhesives, allowing for a metallic appearance, radar transparency, and integration of satin and gloss finishes with patterned designs and backlighting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional printing or painting processes are used to apply graphics to a decorative coating, then colored graphics can be achieved, but the graphic region becomes opaque to light and abrasion resistance is insufficient
Solution Approach 1:
The patent replaces traditional mechanical printing/painting processes with a PVD (Physical Vapour Deposition) coating process. The decorative coating is applied as a thin metallic or ceramic layer through vapor deposition, allowing graphics to be created by selective deposition or masking. This substitution enables the graphic regions to maintain light transparency and sufficient abrasion resistance, as the PVD coating forms a durable, adherent layer that can be made semi-transparent while retaining wear resistance.
2Ease of manufacture
If a protective coating with diffusing additive is applied to create a satin finish, then a homogeneous satin finish can be achieved, but it is difficult to create both satin and gloss finishes on the same surface and the process is costly
Solution Approach 1:
The patent applies different surface treatments to different regions of the same substrate. By using selective masking techniques during PVD coating, certain areas receive a satin finish (with diffusing additives) while other areas receive a gloss finish (without additives or with different additive concentrations). This local differentiation allows mixed finishes on the same surface, enabling designs that combine satin and gloss regions according to aesthetic requirements.
3Manufacturing precision
If electroplating is used to achieve satin finishes, then consistent satin finish can be obtained, but creating satin and gloss finishes on the same surface remains challenging and additional printing processes are required
Solution Approach 1:
The patent merges the satin and gloss finish application into a single PVD coating process. By controlling the deposition parameters and using selective masking, both finish types are applied in one continuous operation rather than requiring separate electroplating and printing processes. This integration reduces the total number of process steps, eliminates the need for additional printing operations, and maintains the consistency of satin finishes while enabling gloss regions on the same surface.
4Reliability
If complex multi-layer coating systems are used to achieve metallic appearance with radar transparency, then radio wave transmission can be maintained, but the manufacturing process becomes complex and costly
Solution Approach 1:
The patent employs composite coating structures combining multiple materials with complementary properties. A typical configuration includes a base coat for adhesion and corrosion protection, a metallic intermediate layer (such as aluminum or zinc alloy) for radar reflectivity and metallic appearance, and a transparent top coat for protection and radio wave transparency. This composite structure achieves the desired metallic appearance and radar compatibility while maintaining controlled complexity through systematic material selection and layer optimization.
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 solution enables a robust, cost-effective, and production-efficient radome with minimal radio wave attenuation, enhanced durability, and the ability to create seamless satin and gloss finishes with patterned designs and backlighting, suitable for automotive applications.
Implementation Method 1
A decorative radome design featuring a radio-transmissive substrate with a decorative coating comprising metal or metal alloys, applied using physical vapor deposition (PVD)
Data Source
AI summary
A decorative radome including a radio-transmissive substrate having a first surface on a first side and a second surface on a second side; and a first surface radio-transmissive decorative coating; methods of manufacturing a PVD coated system include applying a hard coating to the substrate; applying a PVD coating by magnetron sputtering to the substrate; and laser etching one or more of a pattern or a graphic into the PVD coating; and A decorative PVD coated item, comprising: a substrate; a hard coating applied to the substrate; a PVD coating provided on the hard coating and the substrate, wherein the PVD coating is laser etched with one or more of a pattern or a graphic so that the PVD coating is at least partially removed and the pattern or the graphic is revealed as a result of the contrast between the substrate and the PVD coating.