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Physical Optics (PO) is used to calculate Radar Cross Section (RCS) of flat plate and dihedral corner reflectors. The numerical results obtained via simulation are used to compare the RCS measured for these targets recovered and non-recovered with Radar Absorbing Materials (RAM). All simulations and experiments are effectuated in a frequency of 10 GHz. Experimental measurements using Radar Cross Section (UCS) confirm the accuracy of the analytical calculation for flat plate and dihedral corner reflectors. The RAM performance is analyzed for each target separately. The RAM used to recover the flat plate and dihedral corner was developed at Divisio de Materiais IAEICTA.

The objective of this study was to illustrate how different methods of obtaining the Radar Cross Section (RCS) of an object may produce different results. RCS diagrams of a metallic airplane model (length, 0.64 m) were obtained in an anechoic chamber, with a Lab-Volt RCS system, and simulated with a simulation software. The measurements and simulations were carried out at the radar frequency of 9.4 GHz. The resulting RCS diagrams show that although there was a good correspondence between the main features in the RCS diagrams, some differences can still be observed, highlighting the need for different techniques to fully represent the RCS of an object.

In this paper, we report the establishment of a new radar measuring facility in Brazil. This facility has a radar operating in the X-, C-and S-bands. To the best of our knowledge, this facility is the first of its kind in Brazil and Latin America. Some of the first RCS measurements carried out in this facility are presented.