Design of a Non-Foster Actively Loaded SRR and Application in Metamaterial-Inspired Components
Design of a Non-Foster Actively Loaded SRR and Application in Metamaterial-Inspired Components
复制标题
DOI：
10.1109/tap.2012.2228621
复制
发表时间：
2013-03
影响因子：
5.7
通讯作者：
M. Barbuto;A. Monti;F. Bilotti;A. Toscano
中科院分区：
文献类型：
--
作者：
M. Barbuto;A. Monti;F. Bilotti;A. Toscano
在本文中，我们研究了使用非福斯特有源元件，以增加工作带宽的开口环谐振器（SRR）的超材料启发的组件中可能的应用。首先，我们设计了所需的有源负载的电路拓扑结构，以补偿SRR的固有电抗，并获得宽带响应。然后，我们表明，相同的程序可以成功地应用到的情况下，基于SRR的天线，并在原则上，任何超材料启发的设备采用SRR。最后，集成电磁和电路模拟器，我们提出了一个可能的现实实现的有源负载，就业的基础上，市售的电路元件。所得到的结果（基于SRR的MEMS天线的阻抗带宽提高了7倍）证明，非福斯特有源负载可以成功地用于克服基于SRR的无源超材料和超材料启发组件的固有窄带操作。在所提出的设计中，充分考虑了与电路元件色散、寄生效应和有源电路稳定性相关的实现问题。
In this paper, we investigate on the use of non-Foster active elements to increase the operation bandwidth of a split-ring resonator (SRR) for possible application in metamaterial-inspired components. First, we design the circuit topology of the active load required to compensate the intrinsic reactance of the SRR and get a broadband response. Then, we show that the same procedure can be successfully applied to the case of a SRR-based monopole antenna and, in principle, to any metamaterial-inspired device employing SRRs. Finally, integrating an electromagnetic and a circuit simulator, we propose a possible realistic implementation of the active load, based on the employment of commercially available circuit elements. The obtained results (seven times improvement of the impedance bandwidth of the SRR-based monopole antenna) prove that non-Foster active loads can be successfully used to overcome the inherent narrow-band operation of SRR-based passive metamaterials and metamaterial-inspired components. The implementation issues related to circuit element dispersion, parasitic effects, and stability of the active circuit are fully considered in the proposed design.