Numerical Computation of the Radar Cross Section of a 120-mm Mortar

Report No. ARL-TN-0716
Authors: Christopher S Kenyon and Traian Dogaru
Date/Pages: November 2015; 22 pages
Abstract: This report investigates the modeling of radar scattering from a 120-mm mortar target in 4 radar frequency bands, L, S, C, and X, in a continuation of a previous report on radar cross-section (RCS) modeling of rockets and an artillery round. RCS calculations are performed by 2 different methods, implemented by the FEKO and AFDTD electromagnetic simulation software packages, over all the possible aspect angles. The solutions obtained by the 2 methods are compared for accuracy validation. The RCS analysis includes prediction of the variation with frequency and the azimuth angle, as well as a comparison among the 4 frequency bands of interest. The results indicated RCS returns slightly lower than the previously reported targets but still fairly close. No band stood out with stronger returns. The target signatures calculated in this study are an important tool for the radar engineers in system performance evaluation.
Distribution: Approved for public release
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Last Update / Reviewed: November 1, 2015