Genetic Algorithms with PDSS and Adaptive Parameters for Phased Array Synthesis

Abstract:
The optimisation problem considered here is the synthesis of phased array weights to meet a far field sidelobe requirement including a 60dB notch on one side. The antenna is a linear phased array of one hundred half-wavelength spaced radiators. The cost measure to be minimised is the sum of the squares of the excess far field magnitude above the specified sidelobe envelope. This penalises sidelobe above the envelope, while neither penalty nor reward is given for sidelobes below the specification. The lower the cost, the more fit the array distribution.