Exploiting frequency diverse array processing to improve SAR image resolution

Cross-range resolution in spotlight synthetic aperture radar (SAR) is primarily a function of the angular extent (Deltathetas) over which data is collected. In [1], the authors proposed a method for improving cross-range resolution for a given Deltathetas by use of frequency diverse array (FDA) techniques. The goal was to exploit an apparent increase in Deltathetas to improve cross-range resolution while retaining benefits of shorter synthetic apertures and integration times using a linear FDA. This paper extends those efforts and introduces the application of FDA techniques to improve range resolution.