On aircraft antennas and basic scattering studies

This report summaries the work accomplished in each of two areas. The on-aircraft studies involved the GTD (Geometrical Theory of Diffraction) analysis of a strip scatterer in the near field of an antenna. In addition, a method for determining the aperture distribution of a linear array through near field measurements has been developed. The basic scattering studies portion attempts to provide an understanding of ray optical solutions and UTD (Uniform GTD) in particular for the analysis of scattering from basic shapes. Specific examples of scattering from plate models, composite cone frustrums and the near zone effects of a basic aircraft model are presented.