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Bounds on Metamaterials in Scattering and Antenna Problems

by: C. Sohl, M. Gustafsson, G. Kristensson
In Antennas and Propagation, 2007. EuCAP 2007. The Second European Conference on (November 2007), pp. 1-4  Key: citeulike:11897902

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Abstract

This paper reports on physical limitations on metamaterials in scattering and antenna problems. A dispersion relation for the extinction cross section is derived from the holomorphic properties of the forward scattering dyadic. The result states that for a given volume, there is only a limited amount of scattering and absorption available in the entire frequency range. The dispersion relation is verified numerically for the perfectly conducting circular disk, and theoretical bounds are illustrated for a plasmonic stratified sphere.


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