An Active Wideband and Wide-Angle Electromagnetic Absorber at Microwave Frequencies
An Active Wideband and Wide-Angle Electromagnetic Absorber at Microwave Frequencies
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DOI：
10.1109/lawp.2016.2544399
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发表时间：
2016-01-01
影响因子：
4.2
通讯作者：
Cui, Tie Jun
中科院分区：
文献类型：
--
作者：
Fan, Yifeng;Zhang, Hao Chi;Cui, Tie Jun
二维(2-D)超材料(MTM)可以用来制造完美的电磁吸波材料。本文提出了一种具有非福斯特负载的新型有源MTM吸振器。对于同时具有横向电(TE)极化和横向磁(TM)极化的斜入射平面波，考虑了材料损耗，解析地证明了其有效电路模型。基于电路模型，引入了稳定性表征，给出了非Foster元件实现宽带广角超材料吸波材料(MA)的设计原则。这些有源元件由基于共振隧穿二极管的二端口非福斯特电路实现。为了验证的目的，给出了一种有源MA设计，与无源MA相比，在微波频率下对TE和TM极化的宽带和广角入射都表现出更高的电磁吸收速率。
Two-dimensional (2-D) metamaterials (MTMs) can be used to create perfect electromagnetic absorbers. In this letter, a novel active MTM absorber with non-Foster loads is proposed. For obliquely incident plane waves with both transverse-electric (TE) and transverse-magnetic (TM) polarizations, its effective circuit model is analytically demonstrated, accounting the material losses. Based on the circuitmodel, a stability characterization is introduced to give the design principles for the non-Foster elements to achieve a wideband and wide-angle metamaterial absorber (MA). These active elements are achieved by a two-port non-Foster circuit based on the resonant tunneling diodes. For the purpose of verification, a sample active MA design is presented, exhibiting a high electromagnetic absorption rate for wideband and wide-angle incidence for both TE and TMpolarizations at microwave frequencies, as compared to its passive counterpart.