Abstract
Methods for measuring the bistatic RCS of objects using near-field scanning and near-field to far-field transformation by mathematical modeling are analyzed. A model two-dimensional problem of diffraction by extended scatterers is considered. A cylindrical scanner is used. One important issue in this case is the possibility of scanning on a truncated surface rather than on the full scanning surface in order to reduce the cost of measurements. Under such conditions the results of the classical method become poorly predictable and an adapted method is required. Two methods based on the expansion in cylindrical waves when scanning on a truncated surface are compared: the classical one, used to measure antenna radiation patterns (the field outside the scanning area is assumed to be zero) [1] and the method proposed by Kim, which allows one to strictly take the truncation of the scanning surface by angle into account [2]. Comparison of the obtained results of both methods confirms the prospects of using the second method.
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Balabukha, N.P., Konyaev, D.A., Shapkina, N.E. et al. Investigation of the Applicability of a Method for Measuring the RCS of Extended Bodies Based on the Expansion of the Near-Field in Terms of Slepian’s Functions by Mathematical Modeling. Moscow Univ. Phys. 76, 1–8 (2021). https://doi.org/10.3103/S0027134921010021
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DOI: https://doi.org/10.3103/S0027134921010021