Simulation of negative permittivity and negative permeability by means of evanescent waveguide modes -: Theory and experiment
Simulation of negative permittivity and negative permeability by means of evanescent waveguide modes -: Theory and experiment
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DOI：
10.1109/tmtt.2005.845194
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发表时间：
2005-04-01
影响因子：
4.3
通讯作者：
Márquez-Segura, E
中科院分区：
文献类型：
--
作者：
Esteban, J;Camacho-Peñalosà, C;Márquez-Segura, E
本文通过对填充各向异性等离子体的波导中简正模传播常数的推导，仔细分析了截止以下波导传播与人工等离子体之间等价的理论基础。 Marques 等人提出的波导和电介质等离子体之间的等价关系对于倏逝 TE 模式有效，对于磁性等离子体和倏逝 TM 模式具有双重对应关系。这个新的等式表明负磁导率介质可以通过低于其截止频率的 TM 模式来模拟。还强调了对波导进行各向异性填充以实现等离子体和倏逝模式之间的等效性的需要。为了举例说明这种新等价的适用性，提出了一种实现双负介质的结构。提出了所提出的结构的全波模拟和实验装置的测量结果，两者都证实了新等价式的有效性。
In this paper, the theoretical foundations of the equivalence between waveguide propagation below cutoff and artificial plasmas are carefully analyzed through the derivation of the propagation constants of normal modes in waveguides filled with anisotropic plasmas. The equivalence between waveguide and dielectric plasma proposed by Marques et al, which is valid for evanescent TE modes, has a dual counterpart for magnetic plasmas and evanescent TM modes. This new equivalence states that a negative magnetic permeability medium can be simulated by means of TM modes below their cutoff frequencies. The need of an anisotropic filling of the waveguide for the equivalence between plasmas and evanescent modes is also highlighted. To exemplify the applicability of this new equivalence, a structure that implements a double-negative medium has been proposed. Full-wave simulations of the proposed structure and measurements from an experimental setup are presented, both of which corroborate the new equivalence's validity.