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Comparative study of radiation enhancement due to metamaterials
Author(s) -
Khodja Mohamed R.,
Marengo Edwin A.
Publication year - 2008
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/2007rs003803
Subject(s) - metamaterial , piecewise , lossless compression , antenna (radio) , radiation , electromagnetic radiation , physics , core (optical fiber) , shell (structure) , optics , inverse , radiation properties , mathematics , computer science , mathematical analysis , geometry , materials science , telecommunications , algorithm , data compression , composite material
We present a comparative study on radiation enhancement due to metamaterial antenna substrates. The study is performed via electromagnetic inverse source theory and constrained optimization. The aim of the study is to understand the effect of reference antennas on enhancement level estimates. The geometry of the problem is that of a piecewise‐constant, radially symmetric, three‐region system (spherical core‐shell system). Particular attention is given to the case when the core and the shell are made up of lossless materials having oppositely signed constitutive parameters.