Broadband and Low Beam Squint Leaky-Wave Radiation from a Uniaxially Anisotropic Grounded Slab
Grupo de investigación
Grupo Electromagnetismo Aplicado a las TelecomunicacionesÁrea de conocimiento
Teoría de la Señal y las ComunicacionesPatrocinadores
Ministerio de Educación y Ciencia, Ref. TEC2010-21520-C04-04Fecha de publicación
2011-04-01Editorial
American Geophysical Union (AGU)Cita bibliográfica
SHAHVARPOUR, A., CALOZ, C., ÁLVAREZ-MELCÓN, A. Broadband and Low Beam Squint Leaky-Wave Radiation from a Uniaxially Anisotropic Grounded Slab. En Radio Science. Vol. 46, RS4006, April 2011. ISSN: 0048-6604Revisión por pares
SIPalabras clave
MetamaterialsLeaky-wave antenna
Integral equations
Anisotropic slabs
Resumen
The behavior of leaky and surface modes in uniaxially anisotropic grounded slabs is
investigated. First, a transverse magnetic and transverse electric modal parametric
analysis of the structure is performed, based on dispersion relations, comparing the
non-dispersive and Drude/Lorentz dispersive anisotropic slabs with an isotropic
non-dispersive slab. This analysis reveals that in the case of the isotropic slab, the leaky wave
pointing angle is restricted to the end-fire region. In contrast, it is shown, for the first time,
that the proposed anisotropic dispersive grounded slab structure provides efficient (in particular highly directive) leaky wave radiation with a high design flexibility. Toward its
lower frequencies, the dominant leaky mode provides full-space conical-beam scanning.
At higher frequencies, it provides fixed-beam radiation (at a designable angle) with
very low beam squint. A vertical dipole source is placed inside the slab to excite the
relevant leaky wave ...
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