Ultra-wide-band fully-polarized stealth random surface and design method thereof

Abstract

The invention discloses an ultra-wide-band fully-polarized stealth random surface and a design method thereof. Each unit structure comprises an upper-layer metal patch layer, a medium substrate and alower-layer continuous metal backboard, which are combined together in sequence. The designed random surface realizes non-directional scattering of electromagnetic waves through the microstrip reflection array antenna theory. The unit structures of the random surface are same in structure, but different in size. An HFSS automatic parametric modeling method is suitable for continuous establishing of such model. In order to realize automatic generation of different sizes of unit structures and get the ordered arrangement, programming design can be carried out through MATLAB software to finish automatic modeling of the random surface. The random surface is small in difficulty of the design principle, has an ultra-wideband low RCS characteristic, and meanwhile, has a polarization insensitive property; and the random surface has the advantages of very low profile, thinner thickness, light weight and easy processing, and can be widely applied to the field of electromagnetic stealth of each device platform and weapon platform and the like.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic fields and microwaves, and in particular relates to an ultra-wideband fully polarized stealth random surface and a design method thereof. Background technique [0002] Stealth technology is playing an increasingly important role in modern military warfare. Facing the increasingly complex electromagnetic environment in modern military, the stealth performance of weapon platforms plays a vital role in its combat survival probability and penetration capability. At this stage, the stealth technology for aircraft shape is relatively mature. Based on this development status, the radar cross-section (Radar Cross-Section, RCS) of aircraft and other carrier targets can be ideally reduced. As we all know, radar stealth technology plays a decisive role in improving the vertical penetration capability and combat survivability of weapons and equipment, and has always been an important research topic in...

AI Technical Summary

Problems solved by technology

However, the perfect absorbing material also has certain defects. The ideal absorbing characteristics only exist in a narrow band, which is caused by the principle of electromagnetic resonance.

In order to expand the working bandwidth, the structure of multi-layer resonant unit can be used, but the frequency band extension capability of this method is limited, and at the cost of sacrificing the overall thickness

In addition, the method of loading lumped elements can be used, but it still increases the thickness of the material and increases the complexity of the manufacturing process, which is not conducive to mass production applications

There is also a method of loading a resistive sheet. Although it does not significantly increase the overall thickness of the material, it cannot broaden the absorption bandwidth in a large range.

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