ARRAY ANTENNA PATTERN MODELING METHODS THAT INCLUDE MUTUAL COUPLING EFFECTS

Results from an investigation into methods of modeling the radiation patterns of phased arrays that include the effects of radiative mutual coupling are presented. The approaches are based either on the principle of pattern multiplication or the use of active element patterns. Theoretical derivations of the various active element pattern methods are also presented. In addition, a new method, the hybrid active element pattern method, is introduced which accurately predicts the patterns of small and medium-sized arrays of equally spaced elements. Example arrays of center-fed dipoles are analyzed to verify and illustrate the representations. The results are general, however, and can be applied to arrays of any type of element. The array patterns computed using both the classical pattern multiplication approach and the methods based on active element patterns are compared to those computed using accurate numerical codes based on the method of moments.