An analytic model for estimating the average radar cross section (RCS) for identifying the flickering target

We develop an analytical model for estimating the average RCS which gives good results in identifying flickering targets. The proposed analytical model is applied, specially in the high frequency operating range, by resolving the shape of the complex flicker targets into a number of simple geometric segments, of defined cross-section. Thus the scattered-field contribution from each of these geometric components is in turn attributed to the combination of various analytic and geometric components, and only the major contributors are retained. For simple bodies, these contributions were combined by taking into account the relative phases between the analytic components. However, for a complex body, there may be a large number of components of the same relative magnitude which contribute to the cross section. In this event, small errors in the estimate of the relative phases between these contributors can lead to large errors in the estimated cross section patterns. These large errors are avoided by developing the proposed model based on calculating the average cross section σ_aν. The simulation represents the variation of the average cross section calculated by the proposed analytical technique for the target in question, as a function of the aspect angle and frequency (target frequency signature), illustrating the effect of this analytical technique in estimating an average cross-section approximately equal to the average RCS of the experimental measurement