Random phase gradient multi-polarization, polarization-independent wide-angle RCS reduction metasurface

Abstract

The invention belongs to the technical field of novel artificial electromagnetic materials and radar stealth, and discloses a random phase gradient multi-polarization and polarization-independent wide-angle RCS reduction metasurface. The random phase gradient multi-polarization and polarization-independent wide-angle RCS reduction metasurface is composed of multiple types of aperiodic unit structures and comprises a metal pattern layer, a dielectric substrate and a metal back plate, wherein the upper metal pattern layer is located on the upper surface of the dielectric substrate. The multiple types of aperiodic units are composed of two basic units or one basic unit; and the units of other types are composed of at most two basic units, the shape is of a v or x structure, and all the units are randomly distributed on the metasurface. The unit of the metasurface does not have a specific period, the random phase gradient is generated by changing the rotation angle of a metal cutting line on the unit and adopting multiple types of units, incident waves are scattered to any direction by the random phase gradient, and the characteristics of multi-polarization, polarization independence and wide-angle RCS reduction are achieved.

Description

technical field [0001] The invention belongs to the technical field of novel artificial electromagnetic materials and radar stealth, and in particular relates to a random phase gradient multi-polarization, polarization-independent wide-angle RCS reduction metasurface. Background technique [0002] At present, the realization of stealth technology mainly lies in reducing the radar cross section (RCS) of the detected target. The main methods to reduce RCS include radar absorbing materials and scattering field redirection. Radar absorbing materials can absorb electromagnetic waves and reduce the RCS of covered objects. At the same time, multi-layer absorbing materials can be used to expand the RCS reduction bandwidth. Using the scattered field redirection technology, the scattered field can be artificially controlled, so that the RCS can be reduced within the desired range. Artificial magnetic conductors (AMCs) and metamaterials are often used in the scattered field redirection...

AI Technical Summary

Problems solved by technology

[0006] The significance of solving the above problems and defects is that the detection radar is non-directional, and there may be electromagnetic waves in different polarization forms irradiating the target, so there are certain limitations in the structure that can only achieve good performance under specific conditions, so the design has many advantages. RCS reduction metasurfaces with polarization and polarization-independent properties are necessary

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