Modelling electromagnetic scattering from large non-uniform planar arrays

The scattering from planar arrays has been modelled using Scale changing technique (SCT) by partitioning the cellular geometry in numerous nested domains defined at different scale-levels within the array-plane. Multi-modal networks, called Scale Changing Networks (SCN), are then computed to model the electromagnetic interactions between any two successive partitions. Since the computation of scale changing networks is mutually independent, execution times can be reduced significantly by using multiple processing units. Moreover any single change in the cellular geometry would require the recalculation of SCN corresponding to that scale only which means the entire simulation does not need to be run allover again. Full-wave analysis of both uniform and non-uniform planar arrays has been performed successfully under plane-wave incidence and it is shown that the technique accurately models inter-cellular coupling.