Research on resolution of bistatic forward-looking SAR based on spatial wavenumber of the point target

In this paper, a novel method of spatial resolution analysis for low frequency (LF) ultra-wideband (UWB) bistatic forward-looking SAR (BFSAR) is presented, which is based on the wavenumber domain spectrum support of point target. First, the imaging geometry and signal model of the LF UWB BFSAR are established, and the wavenumber domain spectrum support of the point target is analyzed. Then, the analytical expression of the spatial resolution of LF UWB BFSAR is derived. Finally, the simulation experiment is carried out, and the results prove the correctness and validity of the proposed method of spatial resolution analysis.