Stealth Coatings for Aircraft

A lightweight metamaterial absorber that can absorb a wide range of frequencies from 2-18 GHz for applications like radar stealth and electromagnetic interference mitigation. The absorber is made using a carbon-based conductive film on a foam substrate. The foam provides low density and the carbon film provides conductivity. The absorber has multiple layers of carbon film arrays on foam layers. The carbon film arrays are arranged in a specific pattern to create a metamaterial structure. This allows broadband absorption over multiple frequency bands. The foam also allows the absorber to have wide angle absorption without alignment issues.

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Aircraft cloaking system that uses electroluminescent paint and cameras to make the aircraft blend into its surroundings. The system has electroluminescent paint patterns on the aircraft that can be independently lit in different colors. Cameras detect the background color and a processor activates the corresponding paint areas to match. This allows the aircraft to dynamically change color and luminescence to blend into different environments.

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A device for reducing electromagnetic energy, such as radar or radio signals, that uses geometric shapes with prime numbers in their construction. The device, called a prime polygon reflector, has reflective surfaces that cause multiple internal reflections of incident waveforms. This increases absorption of the waveforms when combined with absorptive materials. The prime polygon shapes allow non-inverted reflections compared to flat surfaces. The device can be used as a panel, like a roof or wall material, to actively reduce electromagnetic exposure without needing an electrical ground.

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Cloaking and deception of radar systems by using resonator arrays that can dynamically change the phase of the reflected radar signal. The resonator arrays are configured to provide a time-varying resonance frequency characterized by a linear temporal function. This allows compensating for the Doppler shift of the radar signal due to the object's motion, making it appear stationary to the radar. The resonator arrays collectively generate a phase shift between the incident and scattered radar waves when the resonance frequency varies over a range. By controlling the resonance frequency with a linear time dependence, the radar sees a phase shift that cancels out the Doppler shift. This cloaks the object from radar detection even though it reflects radar energy.

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A composite wave-absorbing stealth coating that enhances radar-absorbent materials (RAM) by incorporating barium ferrite and nanometer ZrO2 ceramic powders. The coating combines these materials with low-temperature glass powder for plasma-sprayed applications, enabling high-performance radar-absorbent surfaces with enhanced thermal stability and durability.

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A multi-layer film for stealth and thermal management that enables comprehensive protection across multiple infrared and visible spectral bands. The film comprises a substrate, a mid-infrared selective emission layer, a short-wave infrared control layer, and a near-infrared control layer arranged sequentially from the inside to the outside. This configuration enables effective infrared stealth while simultaneously addressing thermal management requirements through selective emission control and radiation dissipation.

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A lightweight, heat-resistant, and heat-insulating stealth coating comprising a combination of nanostructured fillers and hollow microsphere particles. The coating is prepared through a novel process that integrates these materials into a uniform dispersion through a multi-step dispersion process, followed by controlled drying and brushing. The resulting coating exhibits superior thermal resistance and wave-absorbing properties compared to conventional stealth coatings, with specific performance metrics including density, thermal conductivity, and wave absorption characteristics.

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Stealth coating for military aircraft that achieves radar invisibility through a multi-layered film structure. The coating comprises a substrate coated with a vacuum-deposited laminate of multiple ultra-fine layers, each optimized for specific stealth functions. The layers are engineered to provide temperature resistance, wear resistance, low drag, and broadband radar absorption across visible and infrared spectrums. The coating combines the benefits of conventional stealth materials while overcoming their limitations through its unique multi-layered design.

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A composite coating for aircraft surfaces that enhances stealth through both infrared and radar absorption. The coating consists of a nano-structured surface layer with integrated infrared absorption properties and a transparent adhesive layer that connects the surface layer to a light-absorbing paint finish. This dual-layer design enables both infrared absorption and radar absorption, providing comprehensive stealth protection against detection by radar and infrared sensors.

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A stealthy aircraft carrier design incorporating advanced radar-absorbent materials (RAM) with integrated acoustic protection. The carrier features a dual-layered surface coating system comprising a polyurethane foam layer and a graphene-based radiation-absorbing layer. This composite coating system provides both radar-absorbent and acoustic protection, enabling the carrier to evade detection while maintaining stable buoyancy and maneuverability. The system integrates a permanent floating airbag system for enhanced survivability in extreme environments.

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A three-dimensional diffuse reflection and wave-absorbing coating for aircraft stealth that combines the principles of planar stealth coatings with the advantages of three-dimensional wave absorption. The coating comprises a rigid polyurethane foam layer with integrated polyurea waterproof coatings, which provides both structural integrity and high-performance wave absorption. The polyurea layer generates electronic polarization through surface electronic polarization, enhancing the coating's radar-absorbent properties. This multi-layered approach enables a comprehensive solution for aircraft stealth that addresses both reflection reduction and wave absorption capabilities.

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A novel radar-absorbing paint for military stealth technology that enables aircraft to evade detection by radar systems. The paint employs a unique composition of buckminsterfullerene particles with a specially designed elastic base, which provides enhanced radiation retention properties. The buckminsterfullerene particles are incorporated into a high-temperature, flame-resistant paint that maintains its structural integrity even at supersonic speeds. This paint achieves radar absorption while maintaining structural integrity, enabling aircraft to operate at low altitudes without being detected by radar systems.

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Electromagnetic wave unidirectional conductive coating for aircraft surfaces that combines stealth radar-absorbing properties with electromagnetic wave transmission control. The coating comprises a surfactant-based dispersion of nanometer copper-zinc powders, nanometer ultrafine carbon black, and graphene, with an adhesion promoter and anti-settling agent. The dispersion is prepared through a surfactant-free dispersion process, followed by grinding to achieve a fineness below 25 microns. The dispersion is then formulated with a surfactant, anti-static agent, and adhesion promoter, and filtered and packaged for application on aircraft surfaces.

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A stealth coating for aircraft surfaces that combines high-temperature thermal insulation with full-frequency wave absorption. The coating comprises a reinforced chopped fiber matrix, pressure-resistant hollow microspheres, and a wave-absorbing agent. The reinforced fiber matrix provides excellent thermal insulation, while the pressure-resistant hollow microspheres enhance wave absorption at frequencies above 1 GHz. The wave-absorbing agent further enhances the coating's radar-absorbing properties. This integrated coating enables aircraft surfaces to achieve both thermal protection and radar stealth capabilities.

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A multi-band stealth coating for aircraft that achieves both electromagnetic and acoustic stealth capabilities. The coating combines a hybrid nanomaterial system comprising a mixture of iron oxide nanoparticles and organic silicate with a cross-linked polyurethane matrix. The nanomaterials provide broadband absorption across electromagnetic and infrared frequencies, while the polyurethane matrix enhances mechanical properties and adhesion. The coating exhibits improved durability and corrosion resistance compared to traditional stealth coatings, enabling simultaneous electromagnetic and acoustic stealth performance.

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A method for preparing stealth coatings for aircraft that addresses conventional limitations in radar-absorbent materials (RAM). The method enables the creation of high-performance, low-weight stealth coatings through the integration of advanced nano-absorbent materials with conventional aircraft coatings. The nano-absorbent components provide exceptional radar-absorbance characteristics while maintaining superior durability and weather resistance compared to traditional RAM formulations. This integrated approach enables the development of ultra-lightweight, high-performance stealth coatings that meet the stringent requirements of modern aircraft applications.

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Infrared stealth coating method that addresses existing limitations in military applications. The method involves a novel combination of a specific filler and adhesive system, optimized for infrared detection applications. The filler system, comprising a combination of British powder and zinc acetate, enhances infrared stealth performance while maintaining superior leveling and wear resistance characteristics. This combination enables improved infrared detection capabilities compared to conventional stealth coatings.

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A method for preparing stealth coatings that addresses common challenges in aerospace applications such as moisture, salt spray, high temperature, and mildew resistance. The method employs a nano-absorbent coating comprising inorganic nano-materials and organic polymer materials, where the nano-materials are precisely controlled to achieve optimal absorption performance. This nano-absorbent coating system enables the creation of stealth coatings that maintain their performance characteristics across a wide range of environmental conditions, including extreme temperatures and humidity levels, while maintaining their radar-absorbent properties.

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Aircraft design that integrates stealth features with optimal radiation protection. The aircraft features a dual-profile design where the outer surface is made of a transparent material, while the inner surface is coated with a reflective material. This dual-layer design ensures both aerodynamic performance and radiation protection, with the transparent outer surface providing aerodynamic advantages and the reflective inner surface providing effective radiation shielding.

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A multi-functional stealth coating for aircraft that simultaneously absorbs and attenuates electromagnetic waves and sound waves, reducing reflection and scattering. The coating comprises a matrix of acrylic resin, polyurethane, and aqueous resin, with specific additives including nickel, isophorone diisocyanate, zinc chromate, triethanolamine, and zinc oxide. The coating achieves infrared reflectance and thermal control through its unique composition and processing, enabling effective stealth performance across multiple electromagnetic bands.

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