Conference Paper

Resonant properties of dielectric metamaterials

Mater. Res. Inst., Pennsylvania State Univ., University Park, PA, USA;
DOI: 10.1109/APS.2005.1552845 Conference: Antennas and Propagation Society International Symposium, 2005 IEEE, Volume: 4B
Source: IEEE Xplore

ABSTRACT We report the results of a study of dielectric structures consisting of higher-permittivity posts embedded periodically in a lower-permittivity host matrix. Such structures can be fabricated by using low temperature co-fired ceramic (LTCC) technology, which allows us to co-process different dielectrics in a single module. We simulate the transmission and reflection characteristics, as well as the field distribution in these structures, and show that they exhibit unusual electromagnetic properties because of interaction between the neighboring dielectric resonators at their respective resonant frequencies.

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    ABSTRACT: Simulation analysis of electromagnetic response of infinite 2D arrays of dielectric ceramic resonators and of parallel 2D arrays comprising 3D metamaterial blocks is presented. Modeling of the arrays has been performed by applying periodic boundary conditions to various unit cells. It was revealed that coupling between elementary magnetic resonances in infinite 2D arrays can affect both the resonance frequency and the resonance Q-factor. Defects in array periodicity were found to cause partial splitting of the resonance modes. It was shown that coupling between parallel 2D arrays stacked in the direction of wave propagation produced a drastic splitting of the resonance modes and led to the formation of the resonance band. The observed effects demonstrate that the uniform medium concept can be not applicable to the description of 3D metamaterial structures.
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    ABSTRACT: In this paper, we present the results of EM field and scattering parameter spectra simulations and measurements for unit cells composed from two cylindrical resonators. The backward wave observations in such unit cells demonstrated a complicated character that has not been reported before.

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