Microwave absorber based on permeability-near-zero metamaterial made of Swiss roll structures. (13th October 2015)

• Record Type: Journal Article
• Authors: Chen, Ke; Jia, Nan; Sima, Boyu; Zhu, Bo; Zhao, Junming; Feng, Yijun; Jiang, Tian
• Is Part Of: Journal of physics. Volume 48:Number 45(2015)
• Publication Date: 2015-10-13
• Subjects: metamaterial -- permeability-near-zero -- microwave absorber; Physics -- Periodicals; 530
• DOI: 10.1088/0022-3727/48/45/455304
• Languages: English
• ISSNs: 0022-3727

Abstract

Abstract: In this paper, we propose a metamaterial with Swiss roll structure inclusions comprising helically wound metal/dielectric sheets to construct a slab electromagnetic (EM) wave absorber with a thickness of only 1/80 of the working wavelength. The Swiss roll structure, when analyzed under the effective medium theory, exhibits a permeability-near-zero (or mu-near-zero, MNZ) property as the real part of the permeability vanishes to zero, while the imaginary part stays relatively large at a certain frequency band. This property can be utilized to design a microwave metamaterial absorber at deep sub-wavelength thickness. The proposed absorber demonstrates near-perfect absorption at the frequency around 1.3 GHz with incidence angles up to ±45°. A topology of orthogonal arranged Swiss roll structures are introduced to form the polarization insensitive metamaterial absorber. Prototypes have been fabricated and measured either in a TEM cell or in a microwave anechoic chamber to validate the absorption performance as well as the design principle. The proposed design could be easily scaled to work at other frequencies as a MNZ metamaterial or ultrathin EM absorber.