Transparent broadband random surface

Abstract

The invention discloses a transparent broadband random surface, comprising multiple unit structures. The unit structure comprises the upper transparent conductive film layer, transparent substrate and lower transparent conductive film layer. The upper transparent conductive film layer is located at the upper surface of transparent substrate and the lower transparent conductive film layer is fully covered at the lower surface of transparent substrate; the upper transparent conductive film layer is the double resonance unit structure with random sizes; and the double resonance unit structure is the symmetrical structure, comprising the ring located at the center of unit structure and stub ring located at the periphery of ring. The transparent broadband random surface can realize the light transmittance >=85% within the scope of visible light, effectively shorten the RCS of target object in the X wave band with simple technology, uniform structure and transparent visible light, has excellent electromagnetic scattering properties and play an important role in such fields as invisibility of aircraft cockpit.

Description

Technical field [0001] The invention relates to radar stealth and a new artificial electromagnetic material, in particular to a transparent broadband RCS (Radar Cross Section) reduction surface in a microwave frequency band. Background technique [0002] The new type of artificial electromagnetic material (Metamaterials) involved in the present invention is composed of a certain scale of periodic arrangement of sub-wavelength unit structures. By artificially designing the unit structure, the equivalent dielectric constant, permeability, refractive index, and wave impedance of the material can be controlled And other electromagnetic parameters to realize the properties that the materials that exist in nature do not have. With the deepening of the theoretical research and application development of new artificial electromagnetic materials, its application in the field of radar stealth, especially the application of weapons and platform stealth in military operations, has attracted ...

AI Technical Summary

Problems solved by technology

[0004] However, the current stochastic surface research is mostly limited to polyimide as the dielectric material, and the designed patterns are mostly etched on the dielectric layer by means of metal patches, and then this structure is covered on the metal body to reduce the RCS of the target body

However, since the metal patch / polyimide / metal layer structure cannot be transparent to visible light, it cannot meet the requirements in some special areas such as fighter cabins and cockpit glass.

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