Optimization schemes for scattering of periodic structures

Combining conventional radar absorbing material with periodic patch array structures, say frequency selective surface (FSS) type absorbers, have more freedom of degrees and so can be designed to be more efficient than the conventional radar absorbing material. In this paper, three optimization schemes such as parallel particle swarm optimization (PPSO), binary-coded genetic algorithm (BGA) and decimal-coded genetic algorithm (DGA) are investigated in the design of FSS type absorber. The goal functions are set up based on spectral moment method. Efficiency of three optimization schemes are compared each other. Numerical results showed that PPSO has a much better convergence than DGA and BGA.