Metamaterial imaging device

Abstract

The invention relates to a metamaterial imaging device which comprises a first metamaterial. Echoes reflected by the surface of an object in a scattered manner are collected and imaged by the first metamaterial, the first metamaterial comprises a functional layer consisting of a plurality of parallel sheet layers, each sheet layer comprises a sheet-shaped substrate and a plurality of artificial microstructures arranged on the sheet-shaped substrate in an attached manner, each sheet-shaped substrate is divided into a plurality of unit blocks, each artificial microstructure and the corresponding unit block occupied by the artificial microstructure form a unit cell, each unit cell has anisotropic electromagnetic parameters, the multiple unit cells arranged along a first direction of each sheet layer are divided into a first middle area and a plurality of first banded areas positioned on two sides of the first middle area, the refractive index of each first banded area is continuously increased towards the corresponding first middle area, and the refractive indexes of each two adjacent banded areas are discontinuous. The metamaterial imaging device is provided with the first metamaterial with a collecting function to replace a convex lens for imaging, and has the advantage of simplicity in processing technology.

Description

technical field [0001] The invention belongs to the field of metamaterials, and more specifically relates to a metamaterial imaging device. Background technique [0002] Microwave imaging is to first transmit electromagnetic waves (microwave band) to the target, and then receive the scattered echoes of the target for imaging. In the prior art, the electromagnetic wave is converged to the measured object through the lens, and then part of the electromagnetic wave diffusely reflected is converged and imaged through the lens. The convergence of the lens is realized by the refraction of the spherical shape of the lens. This method needs to obtain high High-resolution imaging requires the manufacture of high-precision converging lenses, which is difficult to achieve in terms of processing technology. And the medium of the lens is easy to age. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a metamaterial imaging dev...

AI Technical Summary

Problems solved by technology

In the prior art, the electromagnetic wave is converged to the measured object through the lens, and then part of the electromagnetic wave diffusely reflected is converged and imaged through the lens. The convergence of the lens is realized by the refraction of the spherical shape of the lens. This method needs to obtain high High-resolution imaging requires the manufacture of high-precision converging lenses, which is difficult to achieve in terms of processing technology

And the medium of the lens is easy to age

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