Optimization of thinned aperiodic linear phased arrays using genetic algorithms to reduce grating lobes during scanning

Particle Swarm Optimization of Antenna Arrays With Efficiency Constraints

“…Both arrays feature the same beamwidth since their aperture is equal. It can be concluded that the obtained non-uniform arrays, having apertures bigger than the uninform λ/2-spaced dipole array case, present similar radiation characteristics to thinned aperiodic linear arrays [9].…”

“…A number of studies have highlighted the effects of mismatching during the scanning of a phased array and how it can be alleviated by placing restrictions on the driving-point impedance of each radiator [9], or have determined conditions under which mutual coupling can be used to improve array gain [10]. Another important effect of mutual coupling is on the diversity performance of arrays; Wallace and Jensen have developed a rigorous network analysis method for determining the correlation of closely spaced antennas [11], while Broydé and Clavelier have proposed a methodology for designing receiver front-ends that take advantage of coupling to improve diversity performance [12].…”

Design of Phased Antenna Arrays using Evolutionary Optimization Techniques

“…In these documents, the study has been focused mainly to design scannable linear arrays with nonuniform separation (Bray et al, 2002;Bae et al, 2004;Junker et al, 1998;Tian et al, 2005;Lommi et al, 2002;Panduro et al, 2005)., i.e, the performance of the array is improved, in the sense of the side lobe level, optimizing the spacing between antenna elements. In this case, it is presented the design of scannable linear arrays optimizing the amplitude and phase excitations across the antenna elements.…”

“…The antenna arrays optimization for improving performance represents an open line of r e s e a r c h i n t h e a n t e n n a d e s i g n f i e l d . I n the application of evolutionary optimization techniques for designing antenna arrays, it has been considered the design of different phased array structures, such as the linear arrays (Bray et al, 2002;Panduro, 2006) and the circular arrays , among others. The design of planar arrays is dealt with in (Bae et al, 2005).…”

“…The design of planar arrays is dealt with in (Bae et al, 2005). In many design cases, it has been considered the optimization in the design of scannable arrays with non-uniform separation (Bray et al, 2002;Bae et al, 2004;Junker et al, 1998;Tian et al, 2005;Lommi et al, 2002). In this chapter it is considered the case of designing scannable arrays with the optimization of the amplitude and phase excitations for maximum side lobe level reduction in a wide scanning range.…”