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Descripción
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| Slot array antennas placed over a parallel-plate waveguide (PPWG) are widely used and provide a high gain and efficiency due to their robustness, fabrication simplicity and repeatability. In this kind of antennas the common element is the oversized PPWG which distributes the desired amplitude and phase from the excitation circuit to the radiating elements, with the advantage that it has low losses compared with others feeding systems. A plane wave or quasi-TEM mode is propagated within a PPWG which can be done using several methods: through slots fed by a rectangular waveguide [1] or with an excitation network in microstrip technology [2, 3]. Recently, a new excitation form for PPWG based on a lens which is implemented with metamaterials has been proposed [4]. Metamaterials are periodic artificial structures that can be designed to achieve some novel electromagnetic properties, within a certain range of frequencies, due to their special architecture and not because of the constituent homogeneous materials used to manufacture them. Backward waves propagation, negative refraction and the presence of a forbidden band are some of these properties. In particular, the left-handed (LH) metamaterials exhibit a negative permittivity and permeability simultaneously, leading to a negative refractive index. LH mediums show opposite properties respect conventional mediums, which are called right-handed (RH). | |
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Internacional
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Si |
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Nombre congreso
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2009 IEEE AP-S International Symposium on Antennas and Propagation |
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Tipo de participación
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960 |
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Lugar del congreso
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Charleston (Estados Unidos) |
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Revisores
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Si |
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ISBN o ISSN
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978-1-4244-3647-7 |
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DOI
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Fecha inicio congreso
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01/06/2009 |
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Fecha fin congreso
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05/06/2009 |
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Desde la página
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0 |
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Hasta la página
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0 |
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Título de las actas
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Proceedings del IEEE Conference on Antennas & Propagation |