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EnglishMetasurfaces (MTSs) constitute a class of thin metamaterials used for controlling plane waves and surface waves (SWs). At microwave frequencies, they are constituted by a metallic texture with elements of sub-wavelength size printed on thin grounded dielectric substrates. These structures support the propagation of SWs. By averaging the tangential fields, the MTSs can be characterized through homogenized isotropic or anisotropic boundary conditions, which can be described through a homogeneous equivalent impedance. This impedance can be spatially modulated by locally changing the size/orientation of the texture elements. This allows for a deformation of the SW wavefront which addresses the local wavevector along not-rectilinear paths. The effect of the MTS modulation can be analysed in the framework of transformation optics. This article reviews theory and implementation of this MTS transformation and shows some examples at microwave frequencies.
Martini, E., Mencagli, M., & Maci, S. (2015). Metasurface transformation for surface wave control. PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY OF LONDON SERIES A: MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, 373(2049).
| Titolo: | Metasurface transformation for surface wave control |
| Autori: | |
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| Citazione: | Martini, E., Mencagli, M., & Maci, S. (2015). Metasurface transformation for surface wave control. PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY OF LONDON SERIES A: MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, 373(2049). |
| Anno: | 2015 |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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http://hdl.handle.net/11365/981225
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