Stretching strategy to improve radiation performances sparse array design based on combinatorial cyclic different sets approach

In this paper we proposed a new strategy to improve radiation performance of sparse array antenna design when applied CDS approach with stretching inter-element spacing technique. As an example, the aperture of 32 classic full array elements (d=0.7λ) is stretched with uniform and non-uniform technique and then reduce to 16 elements using CDS approach. The simulation result showed the radiation performances is improved compare to design without stretching strategy.