Synthesis of antenna array pattern using ant lion optimization algorithm for wide null placement and low dynamic range ratio

Abstract

This paper proposes pattern synthesis for wide null placement using Ant Lion Optimization. The synthesis is modeled as a current amplitude-only optimization. In addition, the Dynamic Range Ratio (DRR) constraint-based optimization is proposed so as to minimize the complexity of array feed network and to reduce the inter-element coupling in the antenna array. For the synthesis of pattern with wide nulls and reduced Side Lobe Level (SLL), the proposed method offers 3 dB improvement in peak SLL minimization and 4 dB improvement in wide null depth. For DRR constraint-based array pattern synthesis, the proposed method yields superior performance in suppressing the SLL while reducing the DRR from 21.44 to 15.42.