Improved circuit model for left-handed lines loaded with split ring resonators
Aznar Ballesta, Francisco (Universitat Autònoma de Barcelona. Departament d'Enginyeria Electrònica)
Bonache Albacete, Jordi (Universitat Autònoma de Barcelona. Departament d'Enginyeria Electrònica)
Martín, Ferran, (Martín Antolín) (Universitat Autònoma de Barcelona. Departament d'Enginyeria Electrònica)
American Physical Society

Date:	2008
Abstract:	In this letter, an improved lumped element equivalent circuit model for left-handed lines based on split ring resonators (SRRs) is presented and discussed. It is rigorously demonstrated that although the previously accepted circuit model of these metamaterial transmission lines (a π circuit) provides a good description of device behavior, its electrical parameters do not actually describe the physics of the structure. Conversely, the parameters of the improved equivalent circuit model are representative of the different elements of the structure, including the SRRs, the shunt inductive elements and the host line. It is also shown that the proposed model can be transformed to a πmodel which is formally identical to the previous reported model of SRR-based left-handed lines. With this transformation, the main relevant characteristics of these left-handed lines are perfectly interpreted.
Rights:	Tots els drets reservats.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Inductance ; Metamaterials ; Dispersion relations ; Etching ; Band models ; Band structure ; Capacitance ; Permittivity ; Physics demonstrations ; Wave propagation
Published in:	Applied physics letters, Vol. 92, Issue 4 (February 2008) , p. 043512/1-043512/3, ISSN 1077-3118

DOI: 10.1063/1.2839600

4 p, 348.8 KB

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