A three-dimensional isotropic negative magnetic permeability structure and its preparation method

Abstract

The invention relates to a negative magnetic permeability material, in particular to a three-dimensional isotropic negative magnetic permeability structure. The three-dimensional isotropic negative magnetic permeability structure is composed of three eight-split resonant rings. Among them, the eight-slit resonant ring is composed of an aluminum inner ring and an aluminum outer ring nested. There are cutouts at the quarters of the inner ring and the outer ring. The centers of the four cutouts of the inner ring are respectively connected with the The centers of the 4 1 / 4 arcs of the outer ring are placed correspondingly. The three outer rings of the three eight-slit resonant rings are arranged in pairs at the cutouts of the outer rings, and the three inner rings are arranged in pairs at the center of the 1 / 4 arc of the inner ring. In three-dimensional space, the magnetic resonance behavior of the structure does not depend on the incident angle of electromagnetic waves, and can realize magnetic negative characteristics in the frequency range of about 4.1 GHz, and has the characteristics of three-dimensional isotropy. At the same time, it is verified that the orthogonal mode of the structure will not affect the magnetic resonance behavior of the structure, which is convenient for structural 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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