Hybrid-mechanism electromagnetic metasurfaces for wide bandwidth angular rcs reduction

Abstract

The invention discloses a mixed-mechanism electromagnetic metasurface for wide-bandwidth angular RCS reduction, which mainly solves the problems of narrow bandwidth and poor angle stability for RCS reduction in the prior art. It is composed of two layers of dielectric plates (2, 3) that are closely attached to each other. The upper surface of the lower dielectric plate is provided with a super-surface structure layer (1), and the lower surface is a metal reflection plate (4). The metasurface structure layer is composed of 2×2 mixed mechanism metasurface modules rotating clockwise along the center of the structure, and each metasurface module is composed of 4×4 mixed mechanism metasurface units. Each mixed mechanism metasurface unit is composed of three groups of L-shaped metal patches with different lengths, two groups of metallized through-holes and two groups of lumped resistors welded on the metasurface unit. The metal reflector is connected as a whole. The invention widens the reduced bandwidth of the RCS, improves the angle stability of the metasurface, and can be used for reducing the RCS of the wide-bandwidth angular radar scattering 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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