A metamaterial with negative magnetic permeability

Abstract

The invention relates to a negative permeability metamaterial which comprises a base plate made of non-metallic materials and a plurality of artificial microstructures distributed periodically and adhered onto the base plate, wherein the artificial microstructures are composed of threads of conducting materials and comprise I-shaped structures and opened ring structures shaped like the Chinese character 'ao' and sleeved outside the I-shaped structures. Each I-shaped structure comprises a middle vertical line, a first cross line and a second cross line, and the first cross line and the second cross line are respectively connected at two ends of the middle vertical line. Each opened ring structure shaped like the Chinese character 'ao' comprises an opened ring and a pair of parallel lines extending from two end points forming openings of the opened ring to the inside of the ring. The middle vertical line of the I-shaped structure is arranged between the pair of parallel lines, the first cross line is arranged outside the opened ring structure shaped like the Chinese character 'ao', and the second cross line is arranged in the opened ring structure shaped like the Chinese character 'ao'. By means of the artificial microstructures, negative permeability of -1 can be achieved in low-frequency electromagnetic fields.

Description

technical field [0001] The invention relates to the field of metamaterials, more specifically, to a negative magnetic permeability metamaterial. Background technique [0002] At present, there have been a lot of research on magnetic permeability in the world, and positive magnetic permeability has been relatively mature, but the society urgently needs negative magnetic permeability metamaterials because it has very special functions. For example, when the magnetic permeability of the material is negative When the value and the dielectric constant are negative, the material has the characteristics of negative refractive index, that is, left-handed material. In the low-frequency magnetic field, only one parameter needs to be negative to achieve the function of negative refraction. At this time, when the magnetic permeability is -1, the refractive index also reaches -1, and the function of a perfect lens can be realized. [0003] Metamaterial, also known as artificial electro...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a negative magnetic permeability whose absolute value is significantly greater than 0 in the required frequency band in view of the above-mentioned defects in the prior art that the magnetic permeability cannot be significantly less than 0 to achieve the negative magnetic permeability characteristic Super material

Images