Estimating the Radar Cross Section of a Cavity

The radar cross section (RCS) characteristics of cavities are considered. Experimental data on simplified models obtained in 1966, but which heretofore have not received very wide dissemination, are reviewed and the results are compared with predictions based on a simplified (and semiempirical) theory for the end-on aspect case combined with a ray tracing procedure for other aspects. This theoretical method for estimation purposes is seen to provide quite adequate results.