Mixing Ratio Optimization of Chaff Elements for Wideband Jamming Using PSO

Chaff cloud is widely used in target covering. It contains huge numbers of chaff elements. An optimization method is presented in this letter for determining the mixing ratio of the chaff elements for wideband jamming. The electromagnetic scattering is calculated first for single chaff element with different lengths using the method of moments. Then, the superposition method is adopted to obtain the radar cross section (RCS) of the chaff cloud based on the scattering results of the chaff elements. Finally, the particle swarm optimization algorithm is used to determine the mixing ratio of the chaff elements to minimize RCS fluctuations within the jamming frequency band. Simulations show that the optimized chaff cloud can achieve good jamming performance over a wide frequency range.