A hybrid uniform geometricatlh eory of diffraction( UTD)-moment method (MOM) approach is introduced to provide an efficient analysis of the electromagnetic radiation/scatteringfr om electricallyl arge, finite, planar periodica rrays. This study is motivated by the fact that conventional numerical methods become rapidly inefficient and even intractable for the analysis of electrically large arrays containing many antenna or frequency-selectivseu rface( FSS) elements.I n the presenth ybrid UTD-MOM approach, the number of unknowns to be solved is drastically reduced as compared to that which is required in the conventional MOM approach. This substantial reduction in the MOM unknownsis essentiallym ade possibleb y introducingr elativelyf ew, specialr ay-type (or UTD) basisf unctionst o efficientlyd escribeth e unknowna rray currents.T he utility of the present hybrid approach is demonstrated here for the simple case of a large rectangular phased array of short and thin metallic dipoles in air, which are excited with a uniform amplitude and linear phase distribution. Some numerical results are presented to illustrate the efficiency and accuracy of this hybrid method
A hybrid uniform geometrical theory of diffraction – moment method for efficient analysis of electromagnetic radiation/scattering from large finite planar arrays
NEPA, PAOLO
2000-01-01
Abstract
A hybrid uniform geometricatlh eory of diffraction( UTD)-moment method (MOM) approach is introduced to provide an efficient analysis of the electromagnetic radiation/scatteringfr om electricallyl arge, finite, planar periodica rrays. This study is motivated by the fact that conventional numerical methods become rapidly inefficient and even intractable for the analysis of electrically large arrays containing many antenna or frequency-selectivseu rface( FSS) elements.I n the presenth ybrid UTD-MOM approach, the number of unknowns to be solved is drastically reduced as compared to that which is required in the conventional MOM approach. This substantial reduction in the MOM unknownsis essentiallym ade possibleb y introducingr elativelyf ew, specialr ay-type (or UTD) basisf unctionst o efficientlyd escribeth e unknowna rray currents.T he utility of the present hybrid approach is demonstrated here for the simple case of a large rectangular phased array of short and thin metallic dipoles in air, which are excited with a uniform amplitude and linear phase distribution. Some numerical results are presented to illustrate the efficiency and accuracy of this hybrid methodI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
