Realizing an ultra-wideband backward-wave metamaterial waveguide (dataset)
Seetharaman, Sathya Sai; Tremain, Benjamin; Barnes, William; et al.Hooper, Ian
Date: 22 November 2018
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University of Exeter
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Abstract
Electro-inductive waves have emerged as an attractive solution for designing metamaterials that support backward propagating waves. Stacked metasurfaces etched with CSRRs have also been shown to exhibit a broadband negative dispersion. We demonstrate, through experiment and numerical modeling, that the operational bandwidth of a CSRR ...
Electro-inductive waves have emerged as an attractive solution for designing metamaterials that support backward propagating waves. Stacked metasurfaces etched with CSRRs have also been shown to exhibit a broadband negative dispersion. We demonstrate, through experiment and numerical modeling, that the operational bandwidth of a CSRR metamaterial waveguide can be improved by restricting cross-polarization effects in the constituent meta-atoms. We report a fractional bandwidth of >56%, which, to the best of our knowledge, is broader than any previously reported value for an electro-inductive metamaterial. We present a traditional coupled-dipole toy-model as a tool to understand the field interactions in CSRR based metamaterials, and to explain the origin of their negative dispersion response.
Physics and Astronomy
Faculty of Environment, Science and Economy
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