Bistatic ISAR imaging based on phase synchronization with fiber optic link

Bistatic Inverse synthetic aperture radar (ISAR) offers the advantages to overcome the limitations of monostatic ISAR with separated bistatic sites. However, the spatial separation results in a special requirement of the reduction of phase error between the bistatic sites. In this paper, the impact of phase error on bistatic ISAR is analysed briefly, and a phase synchronization technique via a long round-trip fiber optic link (FOL) is present. The phase errors in the FOL synchronization experiment were used to simulate a bistatic ISAR imaging. The simulation results show that the FOL synchronization technique can be used as a potential synchronization method due to its effective phase error cancellation.