Title :
On the physical bounds of cloaking and invisibility
Author :
Monticone, F. ; Alu, Andrea
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Texas at Austin, Austin, TX, USA
Abstract :
We discuss fundamental physical bounds on the possibility of achieving electromagnetic invisibility for a given object and a given bandwidth, based on the passivity, causality and linearity of the scattering system. By applying Bode-Fano theory to an equivalent circuit for the scattering coefficients, we derive limitations on bandwidth and scattering reduction uniquely determined by the object to be cloaked and valid for any passive cloaking scheme.
Keywords :
electromagnetic metamaterials; electromagnetic wave scattering; equivalent circuits; invisibility cloaks; Bode-Fano theory; bandwidth limitations; electromagnetic invisibility; equivalent circuit; fundamental physical bounds; passive cloaking; scattering coefficients; scattering reduction; scattering system causality; scattering system linearity; scattering system passivity; Bandwidth; Electromagnetic scattering; Equivalent circuits; Materials; RLC circuits;
Conference_Titel :
Advanced Electromagnetic Materials in Microwaves and Optics (METAMATERIALS), 2013 7th International Congress on
Conference_Location :
Talence
Print_ISBN :
978-1-4799-1229-2
DOI :
10.1109/MetaMaterials.2013.6809055
