The problem of suppressing the scattering from conductive objects is addressed in terms of harmonic contrast reduction. A unique compact closed-form solution for a surface impedance (, ) is found in a straightforward manner and without any approximation as a function of the harmonic index (scattering mode to suppress) and of the frequency regime (product of wavenumber and radius of the cloaked system) at any frequency regime. In the quasi-static limit, mantle cloaking is obtained as a particular case for ≪1 and =0. In addition, beyond the quasi-static regime, impedance coatings for a selected dominant harmonic wave can be designed with proper dispersive behavior, resulting in improved reduction levels and harmonic filtering capability.
Closed-form harmonic contrast control with surface impedance coatings for conductive objects / Labate, Giuseppe; Podilchak, Symon K.; Matekovits, Ladislau. - In: APPLIED OPTICS. - ISSN 1559-128X. - ELETTRONICO. - 56:36(2017), pp. 10055-10059. [10.1364/AO.56.010055]
|Titolo:||Closed-form harmonic contrast control with surface impedance coatings for conductive objects|
|Data di pubblicazione:||2017|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1364/AO.56.010055|
|Appare nelle tipologie:||1.1 Articolo in rivista|