Theory and Simulations of a Conformal Omni- Directional Subwavelength Metamaterial Leaky-Wave Antenna
Alu, A.
Bilotti, F.
Engheta, N.
Vegni, L.
Univ. of Pennsylvania, Philadelphia;
This paper appears in: Antennas and Propagation, IEEE Transactions on
Publication Date: June 2007
Volume: 55,
Issue: 6, Part 2
On page(s): 1698-1708
Location: St. Petersburg, Russia,
ISSN: 0018-926X
INSPEC Accession Number: 9591205
Digital Object Identifier: 10.1109/TAP.2007.898615
Current Version Published: 2007-06-11
Abstract
The detailed theory of a single subwavelength conformal radiator that exploits the resonant properties of thin cylindrical metamaterial shells supporting leaky waves is presented. It is shown and reviewed analytically and numerically how a circularly symmetric resonant leaky mode may be supported by a properly designed subwavelength homogenous cylindrical shell of low negative permittivity. Some physical insights are provided and numerical simulations with a feed point, considering also the finite-ness of the antenna in the longitudinal direction, are presented and discussed. Moreover, possibilities and limitations of a practical realization of this setup are mentioned, considering in details the possible anisotropies in the metamaterials.
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