A metamaterial-based unidirectional non-reciprocal microwave absorber and a generation method thereof

Abstract

A metamaterial-based unidirectional non-reflective non-reciprocal microwave absorber disclosed in the invention includes at least two pair of metamaterial structures perpendicular to each other, thattwo pairs of metamaterial structures bee asymmetrical in X, Y and Z directions. The invention does not need to introduce a nonlinear material, but constructs artificial second-order nonlinear materialby artificially constructing mutually perpendicular metamaterial units to destroy the spatio-temporal parity characteristic of the equivalent permeability. The unidirectional microwave absorber withthe structure can exhibit obvious non-reciprocity characteristic for waves coming in different directions. The unidirectional non-reflective non-reciprocal absorber can work in two working modes, andit can work independently and without interference, which improves the efficiency and stability of the absorber. It has a wide range of applications in filters, sensors and photonic devices. The invention has the characteristics of popular structure, simple process, flexible design, strong functionality and the like.

Description

technical field

[0001] The invention relates to a wave absorber and a production method thereof, in particular to a metamaterial-based one-way non-reciprocal wave absorber and a production method thereof, belonging to the technical fields of electromagnetic communication and microwave devices. Background technique

[0002] Electromagnetic metamaterials refer to some artificial composite structures or composite materials with extraordinary physical properties. Using electromagnetic metamaterials, many exotic physical phenomena have been realized, such as negative refraction, "perfect" imaging and "invisibility cloaks". In addition, many applications of electromagnetic metamaterials have also been proposed, such as miniaturization of antennas, expansion of storage capacity, invisibility of antennas, ultrathin resonant cavities, and miniaturization of microwave devices. The realization of these phenomena and applications depends on the ability of electromagnetic metamaterials ...

Examples

Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings.

[0028] A metamaterial-based unidirectional nonreflective nonreciprocal absorber, such as Figure 4 As shown, it is composed of several units spliced ​​together. Such as figure 1 As shown, the one-way non-reflective non-reciprocal absorber unit is composed of a glass substrate, a dielectric material and metal microstructure units perpendicular to each other. The microstructural unit is figure 2 There are 2 pairs of mutually perpendicular C-shaped metal ring groups and 2 pairs of mutually perpendicular SRR ring groups (split resonant rings). The size and position of each C-shaped metal ring and SRR ring are different so that they can form cross-polarization. The absorbing efficiency and the reflection efficiency of the one-way non-reflection non-reciprocal absorber can be adjusted by adjusting the structure and position of the ring. Such as figure 2 As shown, 2 pa...

technical field

[0001] The invention relates to a wave absorber and a production method thereof, in particular to a metamaterial-based one-way non-reciprocal wave absorber and a production method thereof, belonging to the technical fields of electromagnetic communication and microwave devices. Background technique

[0002] Electromagnetic metamaterials refer to some artificial composite structures or composite materials with extraordinary physical properties. Using electromagnetic metamaterials, many exotic physical phenomena have been realized, such as negative refraction, "perfect" imaging and "invisibility cloaks". In addition, many applications of electromagnetic metamaterials have also been proposed, such as miniaturization of antennas, expansion of storage capacity, invisibility of antennas, ultrathin resonant cavities, and miniaturization of microwave devices. The realization of these phenomena and applications depends on the ability of electromagnetic metamaterials ...

Examples

Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings.

[0028] A metamaterial-based unidirectional nonreflective nonreciprocal absorber, such as Figure 4 As shown, it is composed of several units spliced ​​together. Such as figure 1 As shown, the one-way non-reflective non-reciprocal absorber unit is composed of a glass substrate, a dielectric material and metal microstructure units perpendicular to each other. The microstructural unit is figure 2 There are 2 pairs of mutually perpendicular C-shaped metal ring groups and 2 pairs of mutually perpendicular SRR ring groups (split resonant rings). The size and position of each C-shaped metal ring and SRR ring are different so that they can form cross-polarization. The absorbing efficiency and the reflection efficiency of the one-way non-reflection non-reciprocal absorber can be adjusted by adjusting the structure and position of the ring. Such as figure 2 As shown, 2 pa...

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