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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Mencagli, M.J. Faenzi, M. Martini, E. Maci, S. |
| Copyright Year | 2014 |
| Description | Author affiliation: Dept. of Inf. Eng., Univ. of Siena, Siena, Italy (Mencagli, M.J.; Faenzi, M.; Martini, E.; Maci, S.) |
| Abstract | Metasurfaces (MTS's) are thin metamaterial layers constituted by a periodic lattice of sub-wavelength elements. They have been recently employed to design leaky-wave antennas or to control the propagation path of guided or surface waves (S. Maci et al., “Metasurfing: addressing waves on impenetrable metasurfaces,” IEEE Antennas Wireless Propag. Lett., vol. 10, pp. 1499-1502, 2011). These applications rely on a proper modulation of the MTS equivalent impedance; for this reason, the capability to efficiently and accurately characterize the MTS impedance is a key step for the design. For same particular geometries of the constituent elements, approximate closed-form expressions are available for the MTS equivalent impedance. This is the case for MTS consisting of square patches, inductive grids or circular patches. However, all these elements provide a quite isotropic equivalent impedance and are therefore limited in their use only to particular applications. Introducing some anisotropy in the MTS behavior leads to a tensorial equivalent impedance and, by providing polarization control, allows one to enlarge the class of synthesizable devices. Application examples are provided by transformation-optics inspired devices (E. Martini and S. Maci, “Metasurface Transformation Theory,” in Transformation Electromagnetics and Metamaterials: Fundamental Principles and Applications, eds. Douglas. H. Werner and Do-Hoon Kwon, Springer, 2013). |
| Starting Page | 96 |
| Ending Page | 96 |
| File Size | 100088 |
| Page Count | 1 |
| File Format | |
| ISBN | 9781479937462 |
| DOI | 10.1109/USNC-URSI.2014.6955478 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2014-07-06 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Surface impedance Closed-form solutions Surface waves Scattering Metamaterials Impedance Antennas |
| Content Type | Text |
| Resource Type | Article |
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