On the influence of frequency-domain broadband beamformer on ISAR imaging

Working on imaging mode, broadband phased array radar applies broadband signal. In order for spatial interference rejection, the radar should do broadband beamforming before imaging. However, the broadband beamformers may influence the performance of imaging. This paper first introduces the typical frequency-domain broadband beamformers, and then discusses the influence on pulse compression and ISAR imaging. Experiment results show that the impact of the frequency-domain broadband beamformers on ISAR imaging can be seemed as windowing the data in range and don´t affect the performance severely. These beamformers are suit to practical broadband phased array ISAR imaging systems.