Abstract:

Evaluate the radar cross section (RCS) of the passive countermeasure system composed of maritime multi-corner reflectors in the far field and high frequency environment. Aiming at the problem of high complexity as well as large computation cost, a hybrid rapid method, combining the improved geometrical optics/area projection (GO/AP) with the scattering center composition algorithm, is proposed to estimate the RCS of multi-corner reflectors efficiently. Firstly, each corner reflector’s RCS is obtained by means of the improved GO/AP according to their distribution situation. Secondly, based on the scattering center composition algorithm, take the coherent superposition of each corner reflector’s component as RCS of multi-corner reflectors under the specific distribution situation. Then, the average of different distribution situations is calculated to represent the overall level of RCS under the specific incident direction. Finally, the validity and efficiency of the hybrid method is confirmed by the comparison with FEKO simulation results.