A Graphite-Based Metamaterial Microwave Absorber

被引：30

作者：

Chen, Xin ^{[1
]}

Jia, Xiubo ^{[2
]}

Wu, Zhuang ^{[3
]}

Tang, Zhixiang ^{[1
]}

Zeng, Yixuan ^{[1
]}

Wang, Xuejiao ^{[1
]}

Fu, Xiquan ^{[1
]}

Zou, Yanhong ^{[3
]}

机构：

[1] Hunan Univ, Coll Comp Sci & Elect Engn, Changsha 410082, Hunan, Peoples R China

[2] Hunan Vocat Inst Technol, Sch New Energy, Xiangtan 411104, Peoples R China

[3] Hunan Univ, Sch Phys & Elect, Changsha 410082, Hunan, Peoples R China

来源：

IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS | 2019年 / 18卷 / 05期

基金：

美国国家科学基金会;

关键词：

Broadband microwave absorption; metamaterial absorber (MMA); ABSORPTION ENHANCEMENT; ULTRATHIN; PERFORMANCE; ANGLE;

D O I：

10.1109/LAWP.2019.2907780

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The absorption of conventional metamaterial absorbers (MMAs), originating from the electric or magnetic resonance induced ohmic loss, usually has a narrow bandwidth because of the limited surface resistance of the structured metal layers. In this letter, we experimentally demonstrate a broadband MMA by using graphite instead of copper to construct the surface pattern structure. Compared with metals, the graphite has a low electric conductivity, and its skin depth is far more than those of metals. As a result, the effective thickness of our graphite-based absorber, which determines the thickness-dependent resonance, is very sensitive to the thickness of the structured graphite layer. Due to the relatively large surface resistance and the sensitive tunable thickness-dependent resonance, our design achieves an absorption bandwidth (less than -10 dB) from 12.7 to 18 GHz. Our results may provide an effective way to tune the thickness-dependent resonance and to broaden the absorption bandwidth of MMA.

引用

页码：1016 / 1020

页数：5

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