Synthesis of thinned planar arrays with two-fold redundancy for microwave interferometric radiometers

Synthesis of thinned planar arrays with two-fold redundancy for microwave interferometric radiometers

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The synthesis of thinned planar arrays with two-fold redundancy in microwave interferometric radiometers (MIRs) is discussed. Based on (double) difference bases, a deterministic method is proposed for constructing two-fold redundancy planar arrays (TFRPAs). The resulting TFRPAs sample the spatial frequencies at least twice within a given baseline coverage, which contributes to the reliability of MIR systems. A comparative study with two typical TFRPAs (i.e. the open-ended ‘Cross’ and the closed ‘’ array configurations) is carried out, concerning array sampling efficiency in the spatial frequency domain. The numerical examples are presented to demonstrate the effectiveness of the proposed synthesis method.


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