Ultrathin broadband RCS reduced coding electromagnetic metasurface

A metasurface and broadband technology, applied in the direction of electrical components, antennas, etc., can solve the problems of narrow bandwidth restriction applications, and achieve the effect of widening the bandwidth of RCS reduction effect

Pending Publication Date: 2022-04-12
BEIJING UNIV OF TECH
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Problems solved by technology

In the microwave frequency band, some artificial electromagnetic conductors (AMC) for RCS reduction have been reported, but their narrow bandwidth problem seriously restricts their application.

Method used

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  • Ultrathin broadband RCS reduced coding electromagnetic metasurface
  • Ultrathin broadband RCS reduced coding electromagnetic metasurface
  • Ultrathin broadband RCS reduced coding electromagnetic metasurface

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Embodiment Construction

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0024] refer to figure 2 As shown, the present invention discloses an ultra-thin broadband coded RCS reduction metasurface, which is composed of two metasurface units with the same reflection amplitude and 180° reflection phase difference arranged according to the optimization rule obtained by the PSO algorithm.

[0025] Further, the super-surface unit structure includes a base metal layer, a middle dielectric layer and a top-layer graphics unit arranged in s...

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Abstract

The invention discloses an ultrathin broadband coding RCS (radar cross section) reduction metasurface, which relates to the technical field of artificial electromagnetic metamaterials and is formed by arranging two metasurface units with the same reflection amplitude and the reflection phase difference of 180 degrees according to an optimization rule obtained by a PSO (particle swarm optimization) algorithm. According to the invention, two AMC structures are designed based on an array theory and are compounded, so that the RCS reduction effect bandwidth is effectively widened; according to a phase cancellation principle, optimization design is carried out by using a particle swarm optimization (PSO) algorithm to obtain an ultra-thin and ultra-wideband coding RCS reduction metasurface. The phase difference of the basic units of the two metasurfaces reaches 180 +/-1 degrees at the full-action bandwidth (21-35 GHz), so that the excellent performance that the relative bandwidth of the coding electromagnetic metasurface reaches 47.2% and the reduction effect exceeds 10 dB is achieved.

Description

technical field [0001] The invention relates to the technical field of artificial electromagnetic metamaterials, in particular to an ultra-thin broadband RCS reduction-coded electromagnetic metasurface. Background technique [0002] In modern warfare, stealth technology is an important part of it, which has a decisive impact on the survival and combat capabilities of various weapons and equipment. The antenna is an important part of various combat platforms, and it is a structure with strong scattering characteristics in the target system. Therefore, effectively controlling the Radar Cross Section (RCS) of the reduced antenna becomes the key to designing a radar system with low detectability. [0003] Novel artificial electromagnetic materials (metamaterials) are artificial composite materials / structures with subwavelength periodic arrangements with widely tunable electromagnetic properties. Through metamaterials, people can realize the regulation of equivalent permittivit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q15/00H01Q15/14
Inventor 张铭席宇鹏王如志王长昊孟宪瑞张持李赛楠马林昊彭凯
Owner BEIJING UNIV OF TECH
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