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Abstract
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| Multi-frequency radars, which are employed in a plurality of emerging applications, exploit the echoes for different bands that come from illuminated targets. A compact multi-function architecture that makes use of direct sampling could be a preferable choice for these new-generation radar systems, with RF front-end design a first step in their development. Here, within the framework of multi-frequency radars, an analytical tool for simultaneously acquiring the signal bands by using the minimum sub-Nyquist sampling frequency is addressed. Although the dual-band radar scenario is exhaustively analyzed, keys to understand the acquisition of more-than-two-band systems are also provided. Moreover, as the core of the associated RF architecture to carry out arbitrary multi-band signal preselections, a new class of microwave planar multi-passband filters based on stepped-impedance-line signal-interference concepts is reported. Also, for validation, the construction and testing of a microstrip spectrally-asymmetrical dual-passband filter prototype for a specific example of minimum-sampling dual-frequency radar RF front-end are shown. | |
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International
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Si |
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JCR
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Si |
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Title
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IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS |
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ISBN
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0018-9251 |
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Impact factor JCR
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1,095 |
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Impact info
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Volume
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49 |
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Journal number
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2 |
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From page
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774 |
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To page
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785 |
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Month
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ABRIL |
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Ranking
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0 |