Spectral transmission line analysis of a left-handed uniaxially anisotropic meta-substrate
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Grupo de Electromagnetismo Aplicado a las Telecomunicaciones (GEAT)Área de conocimiento
Teoría de la Señal y las ComunicacionesPatrocinadores
Ministerio de Educación y Ciencia, Ref. TEC2007-67630-C03-02. Fundación Séneca, Ref. 08833/PI/08.Fecha de publicación
2010-08-19Editorial
Institute Electrical and Electronics Engineers (IEEE)Cita bibliográfica
SHAHVARPOUR, Attieh; ÁLVAREZ MELCÓN, Alejandro y CALOZ, Christophe. Spectral transmission line analysis of a left-handed uniaxially anisotropic meta-substrate. En: International Symposium on Antenna Technology and Applied Electromagnetics and the American Electromagnetics Conference (14ª: 2010: Ottawa, Canadá). 14th. International Symposium on Antenna Technology and Applied Electromagnetics and the American Electromagnetics Conference: ANTEM/AMEREM 2010. Piscataway: IEEE. 2010. P. 4. ISBN 978-1-4244-5049-7Palabras clave
MetamaterialsSpectral domain analysis
Anisotropic substrates
Antena de fuga de ondas
Metamateriales
Análisis espectral de dominio
Sustratos anisotrópicos
Leaky wave antenna (LWA)
Resumen
The TM spectral transmission line model of a
grounded meta-substrate with uniaxially anisotropic properties,
corresponding to a composite right/left-handed sub-wavelength
mushroom-type structure, is computed. The dispersion relation
is found by the transverse resonance technique. It is analyzed
and compared with the particular case of an isotropic grounded
slab. The study is limited to the left-handed region of the meta-
substrate, which corresponds to the frequency band where the
permittivity and permeability are negative and most dispersive.
The work considers only TM modes, for which the effects of
dispersion and anisotropy are most significant. The leaky-modes
in the anisotropic left-handed meta-substrate are shown to exhibit
a leakage factor which may be conveniently designed to very low
values for super highly directive leaky-wave antennas.
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