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Spectral Analysis of Negative Refractive Index Metamaterials Utilizing Signal Processing Techniques and Time-Domain
 

Summary: Spectral Analysis of Negative Refractive Index Metamaterials
Utilizing Signal Processing Techniques and Time-Domain
Simulations
Titos Kokkinos, Raviraj S. Adve and Costas D. Sarris
The Edward S. Rogers Sr. Department of Electrical and Computer Engineering
University of Toronto, Toronto, ON, M5S 3G4, Canada
Abstract
In this paper, signal processing techniques, mostly used for the Direction of Arrival (DoA) esti-
mation in smart antenna systems, are combined with time-domain simulations in order to perform
dispersion analysis of Negative Refractive Index (NRI) metamaterials. The time-domain response
of infinite arrays of unit cells giving rise to NRI metamaterials is calculated using the Finite Dif-
ference Time Domain (FDTD) method together with Periodic Boundary Conditions (PBC). Sub-
sequently, the correlation method, the MUSIC algorithm and the Matrix Pencil method are applied
to the FDTD results and the resonances of those structures are estimated. A comparative study of
the aforementioned algorithms is performed and the advantages of the Matrix Pencil algorithm are
pointed out.
1 Introduction
Recently, synthesized structures (artificial dielectrics) exhibiting simultaneously negative dielectric
permittivity and magnetic permeability have been proposed. Such metamaterial structures are char-
acterized by a negative refractive index (NRI). The electromagnetic properties of NRI media have

  

Source: Adve, Raviraj - Department of Electrical and Computer Engineering, University of Toronto

 

Collections: Engineering