(National University of Defense Technology, Key Laboratory of Science and Technology on Advanced Ceramic Fibers and Composites, Changsha 410073, China)
Keywords:
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CLC:
PACS:
TB 34
DOI:
10.7502/j.issn.1674-3962.2013.08.04
DocumentCode:
Abstract:
Metamaterials have attracted considerable attentions due to their engineered electromagnetic properties and potential applications. One important application of metamaterials is the development of absorbers with nearly unity absorbance. For convenience of the fabrication, most current metamaterials are realized as periodic arrays. However, random metamaterials have gained a growing interest recently, because they exhibit some more desirable electromagnetic properties. Therefore, the influences of disorder on the absorption properties of wire-based metamaterial absorbers were studies here. The numerical and experimental results show that the absorption bandwidth can be enhanced by disordering the wire length, providing a valuable method for designing the wideband absorbers. The absorbers allow a transformation from the absorption of only one linear polarization to that of all polarizations by introducing the disorder degree of the wire spatial orientation, but the random spatial position of wires has little effect on the absorption property. The potential application in the field of engineering was also discussed finally. It is expected that the proposed method has can be used in the design of metamaterial absorbers consisting of other resonators and other frequency bands