Array pattern synthesis with null steering using genetic algorithms by controlling only the current amplitudes

In this paper, the technique for antenna array pattern synthesis with null steering using the genetic algorithms (GA) by controlling only the excitation current amplitudes is presented. This technique is capable of synthesizing the array pattern with nulls imposed at the directions of undesired interferences while simultaneously maintaining the main beam directed toward the desired signal with prescribed sidelobe level and null depth level. The proposed technique is simple and easy to implement compared to conventional array pattern synthesis techniques. The versatility of the proposed technique is also demonstrated by changing the weighting factors of the fitness function constructed for genetic algorithms. Numerical results show the effectiveness of the proposed technique in comparison with published results.