Radio frequency inductively coupled plasma superimposed phase gradient metasurface wave-absorbing structure

Abstract

The invention discloses a radio frequency inductive coupling plasma superposition phase gradient metasurface wave absorbing structure. The structure comprises a plasma coupling phase gradient metasurface structure. The plasma coupling phase gradient metasurface structure comprises a radio frequency inductive coupling plasma source, a phase gradient metasurface and a closed wave-transparent mediumcavity; the radio frequency inductive coupling plasma source is arranged in the closed wave-transparent medium cavity, and the phase gradient metasurface is fixed to the bottom of the outer side of the closed wave-transparent medium cavity. The phase gradient metasurface is of a three-layer structure sequentially composed of a metal copper plate, a dielectric substrate and a metal unit array frombottom to top, and the metal unit array is formed by repeatedly arranging metal units on the dielectric substrate from top to bottom, wherein the metal units are formed by sequentially arranging six H-shaped metal patches from left to right, the widths of the six H-shaped metal patches are equal, and the heights of the six H-shaped metal patches are gradually increased. The problems that an existing plasma wave-absorbing structure is large in thickness, poor in structural applicability and difficult to meet the use requirement, and the attenuation amplitude of electromagnetic waves is small are solved.

Description

technical field [0001] The invention belongs to the field of active stealth technology, and relates to a radio frequency inductively coupled plasma superimposed phase gradient metasurface absorbing structure. Background technique [0002] Anti-stealth radar technology is developing rapidly. The detection threats faced by advanced equipment in the future will expand to ultra-wide frequency bands and multi-angle domains. Reducing the electromagnetic scattering characteristics of targets has become the frontier and focus of target electromagnetic scattering control research. Since the current shape and material stealth technology is mainly aimed at the optical band, and the shape stealth can only reduce the radar scattering characteristics in key directions, the inherent wave-absorbing properties and thickness requirements of material stealth make it difficult to break through broadband stealth, and it is far from being able to achieve wide-angle, wide-band radar stealth. Comp...

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Problems solved by technology

[0004] The purpose of the present invention is to propose a radio-frequency inductively coupled plasma superimposed phase gradient metasurface absorbing structure to solve the problems that the existing plasma absorbing structure has a large thickness and poor structural applicability and is difficult to meet the use requirements, and the current The problem of small attenuation of electromagnetic waves with thin-layer plasma absorbing structures

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