Title :
Bounds on Metamaterials in Scattering and Antenna Problems
Author :
Sohl, C. ; Gustafsson, Mats ; Kristensson, G.
Author_Institution :
Dept. of Electr. & Inf. Technol., Lund Univ., Lund
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.
Keywords :
metamaterials; microwave antennas; antenna problems; forward scattering dyadic; holomorphic properties; metamaterials; perfectly conducting circular disk; plasmonic stratified sphere; scattering problems; dispersion relation; extinction cross section; metamaterials; optical theorem; physical limitation;
Conference_Titel :
Antennas and Propagation, 2007. EuCAP 2007. The Second European Conference on
Conference_Location :
Edinburgh
Print_ISBN :
978-0-86341-842-6
