Failure correction of linear antenna arrays with optimized element position using differential evolution

A novel approach using Differential Evolution (DE) is proposed for linear array failure correction. In presence of the failure of array elements, only the inter-element spacing's between the array elements are adjusted to regain the pattern closed to the original one. The proposed approach is a cost effective method as no additional attenuators or phase shifters are required. A fitness function has been defined suitably and DE algorithm, coded in MATLAB is employed to minimize the cost function using inter-element spacing as optimization parameter vector. Considering a 30 element linear array, the numerical results for the three cases with failure of one. two and three elements are presented and the MATLAB simulated optimized result is validated in FEKO to prove the effectiveness of the proposed entail approach.