Impact of antenna directing jitter in bistatic SAR

Abstract

Bistatic synthetic aperture radar (SAR) system separated its transmitter and receiver, the spatial separation mode provides many technical challenges. This paper addersses on the issue of antenna directing jitter error, the impact of antenna directing jitter including fast jitter and slow jitter are analyzed respectively. In the case of fast jitter, a generalized mathematic model is employed to analyze the impact of antenna directing error on the echo signal, and concluded that the antenna shaking may produce paired echo, the position and the amplitude of the paired echo are analyzed, in the other case, the modulating effect is ignored, and the illuminating region of antenna beam is mainly considered, the impact of echo signal partly misses is introduced. In the end, the simulation results are presented to verify the analyses.