Three-dimensional isotropic negative permeability structure and preparation method thereof

Abstract

The invention relates to a negative permeability material, and specifically relates to a three-dimensional isotropic negative permeability structure. The three-dimensional isotropic negative permeability structure consists of three eight-opening resonant rings. An eight-opening resonant ring consists of nesting an aluminum inner ring with an aluminum outer ring; the quartering points of the inner ring and the outer ring are all provided with cut notches; centers of the 4 cut notches in the inner ring are respectively corresponding to the centers of four 1/4 arcs of the outer ring. Three outer sings of three eight-opening resonant rings are orthogonal two by two at the outer ring cut notches; three inner rings are orthogonal two by two at the centers of the inner ring 1/4 arcs. In a three-dimensional space, magnetic resonant behaviors of the structure are not depended on the incident angle of the electromagnetic wave, and the negative permeability characteristic can be achieved within a frequency range of about 4.1GHz, thus having the three-dimensional isotropic characteristics. Meanwhile, proved is that the orthogonal measure of the structure cannot affect the magnetic resonant behavior of the structure, thus being convenient for structure analysis and material preparation.

Description

technical field [0001] The invention relates to a negative magnetic permeability material, in particular to a three-dimensional isotropic negative magnetic permeability structure and a preparation method thereof, belonging to the technical field of magnetic negative "metamaterial" structure design. Background technique [0002] In 1968, Veselago, a former Soviet scientist, conducted in-depth research on media in which the permittivity ε and magnetic permeability μ are negative at the same time, and theoretically proposed the concept of left-handed materials. Despite the many novel electromagnetic properties of left-handed materials, no actual left-handed material exists in nature, and Veselago's work was ignored for nearly 30 years. Until 1999, Pendry et al. in the United Kingdom proposed that periodically arranged metal wires (ROD) can produce a negative dielectric constant under the action of its plasma effect, and found that the magnetic permeability of the metal split re...

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Problems solved by technology

[0005] The purpose of the present invention is to propose a three-dimensional isotropic negative magnetic permeability structure and its preparation method based on the traditional split resonant ring structure. This structure can not only realize the negative magnetic permeability characteristics in the C-band (4.0-8.0GHz) , and can perfectly realize three-dimensional isotropy, it is a good three-dimensional isotropic magnetic negative structure, which solves the complexity of the traditional magnetic negative "metamaterial" preparation and the limitation of the incident direction

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