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Aperiodic Arrays for Spaceborne SAR Applications

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8 Author(s)
Luison, C. ; Eur. Space Agency (ESA), Noordwijk, Netherlands ; Landini, A. ; Angeletti, P. ; Toso, G.
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An innovative three-step procedure for the synthesis of linear phased arrays with nonuniformly spaced elements is presented. The main objective is to obtain an array with a minimal number of elements and an optimal efficiency of the amplifiers driving the elements. The procedure consists of three steps. First of all, a periodic array with a single-amplitude tapering and as much phase tapering as there are required shaped patterns is derived. Then, starting from the results of the first step, an equiamplitude nonperiodic array, with a number of phase tapering equal to the number of required patterns and with a minimum number of radiators is synthesized. Finally, a numerical optimization permits refining the results so as to satisfy the design constraints.

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Antennas and Propagation, IEEE Transactions on  (Volume:60 ,  Issue: 5 )