Hybrid mechanism electromagnetic metasurface for broadband wide-angle RCS reduction

Abstract

The invention discloses a hybrid mechanism electromagnetic metasurface for broadband wide-angle RCS reduction. The hybrid mechanism electromagnetic metasurface mainly solves the problems that in the prior art, the RCS reduction bandwidth is narrow, and the angle stability is poor. The metasurface is composed of an upper dielectric plate (2) and a lower dielectric plate (3) which are tightly attached to each other, a metasurface structure layer (1) is arranged on the upper surface of the lower dielectric plate, and a metal reflecting plate (4) is arranged on the lower surface. The metasurface structure layer is formed by clockwise rotating 2*2 mixed mechanism metasurface modules along the center of the structure, and each metasurface module is composed of 4*4 mixed mechanism metasurface units. Each mixing mechanism metasurface unit is composed of three sets of L-shaped metal patches with different lengths, two sets of metallized through holes and two sets of lumped resistors welded to the metasurface unit, and the metasurface units and the metal reflecting plate are connected into a whole through the metallized through holes. According to the invention, the reduction bandwidth of the RCS is broadened, the angle stability of the metasurface is improved, and the hybrid mechanism electromagnetic metasurface can be used for reducing the RCS of the broadband wide-angle radar scattering cross section.

Description

technical field [0001] The invention belongs to the field of new artificial electromagnetic materials, and in particular relates to an electromagnetic metasurface structure designed based on a mixing mechanism, which can be used for reducing the RCS of radar scattering cross section with wide bandwidth angle. Background technique [0002] With the rapid development of radio technology and radar detection technology, stealth characteristics have become an important indicator to measure the performance of targets. An important indicator to measure the detectability of targets is the radar cross section RCS. The traditional RCS reduction technology mainly achieves RCS reduction by changing the shape of the target and coating radar absorbing materials. However, due to the limitations of other practical factors, a single shape design cannot achieve wide-band RCS reduction. In addition, coating and absorbing radar absorbing materials will increase the weight and thickness of the t...

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies in the prior art above, and propose a novel hybrid mechanism broadband RCS reduction electromagnetic metasurface, which can control the amplitude and polarization of electromagnetic waves at the same time, and is used to solve the problem of polarization transformation metasurface in the prior art. The surface (PCM) is sensitive to the angle of incidence, and solves the problem that the wide absorption bandwidth and low profile height of the absorber cannot be balanced

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