A truncated Floquet wave diffraction method for the full-wave analysis of large phased arrays - Part II: Generalization to 3-D cases

This second part of a two-paper sequence deals with the generalization to t hree-dimensional (3-D) arrays of the truncated Floquet wave (TFW) diffracti on method for the full wave analysis of large arrays. This generalization p otentially includes arrays consisting of microstrip excited slots, cavity-b acked apertures, and patches. The formulation is carried out first by deriv ing an appropriate fringe integral equation (IE) and next by defining entir e domain basis functions in terms of global-array functions shaped as TFW d iffracted rays whose analytical expression is derived on the basis of proto type canonical problems. The efficiency and the accuracy of this method is demonstrated by comparison with the results of an element-by-element full w ave approach for a rectangular slot array.