Full spatial and polarimetric characterization of a UHF antenna for ultrawide SAR

This paper describes the analysis performed on a developmental ultra-high-frequency (UHF) antenna intended to support ultrawide synthetic aperture radar (SAR) on a Global Hawk platform. Both full-scale and 1/4 -scale test articles were fabricated. The patterns of the 1/4 -scale articles were measured over a full 4/spl pi/ steradians. Full-scale articles were measured over reduced angular regions sufficient to validate scaling. All measurements were fully polarimetric.