Benchmarking of RCS codes

As the control and prediction of the electromagnetic (EM) signatures of air vehicles become more important, the electromagnetic scattering codes are facing more difficult problems. Several sets of targets were built and measured for validating the computational electromagnetic codes as they apply to different problems. The problems include 3-D metallic, and coated targets, 3-D bulk dielectric material, 2-D metallic targets, cavities, and plates close to grazing for edge waves. Two sets of low-cross-section targets were designed and manufactured with a numerical control (NC) mill. The targets are designed to have wide dynamic ranges and very low cross section at certain aspect angles. One set of the targets was metallic and the other set was coated with tapered radar absorbing material. The targets were measured with a band of frequencies and different elevation angles.<>