A novel Modified Invasive Weeds Optimization for linear array antennas nulls control

In this paper, a novel modified invasive weeds optimization (MIWO) is used for the synthesis of linear array antennas. The synthesis problem discussed in this paper is to find the amplitude excitation of the antenna array elements that are optimum to provide radiation pattern with symmetric wide nulls in both sides of the main beam. The Dynamic Range Ratio (DRR) is taken into account in this study. Unlike other simple algorithms, the Modified Invasive Weeds Optimization (MIWO) uses the mutation in the calculation of standard deviation, which changes the step of search in many directions and positions, from the parent plant, to produce new seeds. This proposed algorithm improves the performance greatly and allows to achieve a maximum reduction in side lobe level in band Nulls and with an acceptable DRR value. To show the performance of the proposed method, our results are compared to other results in the literature. They are also compared to a uniform excited linear.