Wave propagation in reconfigurable broadband gain metamaterials at microwave frequencies
Wave propagation in reconfigurable broadband gain metamaterials at microwave frequencies
复制标题
微波频率下可重构宽带增益超材料中的波传播
DOI:
10.1063/1.4949553
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发表时间:
2016-05
影响因子:
3.2
通讯作者:
Cui, Tie Jun
中科院分区:
文献类型:
--
作者:
Rajab, Khalid Z.;Hao, Yang;Zhang, Hao Chi;Cui, Tie Jun
The wave dispersion characteristics for loop array-based metamaterials were analyzed, based on the general transmission line model of a one-dimensional host medium interacting with a chain of coupled loops. By relating the wave propagation constant and the effective parameters of the coupled host medium, we showed that an active medium embedded with non-Foster loaded loop array can be designed to exhibit broadband negative material parameters with positive gain. Accounting for all interactions, the stability of the active medium was investigated, further yielding necessary design specifications for the non-Foster loads. Subsequently, an experimental demonstration was provided to verify the theoretical analysis, showing that stable reconfigurable broadband gain metamaterials at microwave frequencies can be obtained with proper negative impedance converter design.
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