Descripción
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The results of a parametric study and design of an ultrawideband dual-polarized array of differentially-fed tapered slot antenna elements are presented. We examine arrays of bunny-ear antennas and discuss the capabilities and limitations of differential antenna technology. As we focus on radio astronomical applications, the absence of a balancing-feed circuit not only reduces the first-stage noise contribution associated to losses in the feed, but also leads to a cost reduction. Common-modes are supported by the antenna structure when a third conductor is present, such as a ground plane. We demonstrate that anomalies may occur in the differential-mode scan impedance. Knowledge of both types of scan impedances, differential and common mode, is required to properly design differential LNAs and to achieve optimal receiver sensitivity. A compromise solution is proposed based on the partial suppression of the undesired common-mode currents through a (low loss) balancing-dissipation technique. A fully steerable design up to 45 in both principal planes is achieved. | |
Internacional
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JCR del ISI
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Si |
Título de la revista
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IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION |
ISSN
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0018-926X |
Factor de impacto JCR
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2,011 |
Información de impacto
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Volumen
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58 |
DOI
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Número de revista
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1 |
Desde la página
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68 |
Hasta la página
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78 |
Mes
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ENERO |
Ranking
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