Research on the RCS of Serrate Gap in Real Aircraft State

Serrate gaps, as weak scattering sources, are distributed on the surface of aircrafts to affect their stealth performance. Therefore, to obtain the accurate RCS of such gaps in the real aircraft state is of great significance. This study proposes a carrier cancellation method to obtain the RCS scattering characteristics of serrate gaps under the real state of the aircrafts. Commercial software such as FEKO and MATLAB are utilized to implement the ISAR imaging validation of the method. The simulation results show that the gap self-scattering can be obtained accurately by the proposed method. Using this technique, the RCS of serrate gaps are computed under electromagnetic wave irradiation under different frequencies and polarizations.