Multimode‐Assisted Broadband Impedance‐Gradient Thin Metamaterial Absorber

Metamaterials have become a promising alternative for stealth technology due to their impressive abilities to freely manipulate electromagnetic waves. With the development of radar detection technology, stringent performances are required for metamaterial absorbers (MAs), such as wideband, wide‐angl...

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Bibliographic Details
Published in:Advanced photonics research 2022-10, Vol.3 (10), p.n/a
Main Authors: Wang, Yanzhao, Xu, He-Xiu, Wang, Chaohui, Luo, Huiling, Wang, Shaojie, Wang, Mingzhao
Format: Article
Language:English
Subjects:
Bandwidths
broadbands
impedance gradients
indium tin oxide
metamaterial absorbers
multimodes
Polyethylene terephthalate
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Summary:Metamaterials have become a promising alternative for stealth technology due to their impressive abilities to freely manipulate electromagnetic waves. With the development of radar detection technology, stringent performances are required for metamaterial absorbers (MAs), such as wideband, wide‐angle operation, and thin thickness. Herein, a systematic strategy to achieve thin broadband MAs based on trilayer indium tin oxide (ITO) resistive films with multimodes is proposed. The operation mechanism and bandwidth enhancement are analyzed and discussed in terms of the equivalent circuit model and surface current distributions. Guided by the established impedance‐gradient theory, an absorber with high‐efficiency absorption is achieved. Numerical results show that it achieves operation bandwidth (reflection loss 
ISSN:2699-9293
2699-9293
DOI:10.1002/adpr.202200063